FX Impact MKII Harmonic tuning 

Thanks mate! That might be the most eloquent compliment I've ever received cheers haha

Thanks mate! That might be the most eloquent compliment I've ever received cheers haha

No worries mate thanks for watching

Thanks for watching mate!

your welcome sir, thanks for watching

Many years of high level computerer training and graphic design went into those pictures. Hardcore special effects lol

@@meatheadmarksman2013 Well it was very good to watch and for my little brain to understand with pictures. Nice one... Respect from Tynemouth, UK.

700mm is definatly the way to go for bullpups, so much more out of so much less!

Your a man of fine taste then! Good fashion sense Haha

@@meatheadmarksman2013 Takes one to know one ;-)

Thanks for watching mate!

Very nice mate! Yeah my method is on the conservative side, you'll probably find you can get more power and still be reasonably consistant with a few more turns of the hammer spring, I just think that staying back from the cliff edge a little bit is good for shot count/ consistency

That must be with the 25 grain pellet. 909 fps is around 46 FPE

Cheers mate thanks for watching

Thanks mate! I taught alot of people to drive in a past life... maybe that's the crossover

I forgot to talk about stability at high speeds actually... oh well I'll add it when this gets updated

Thanks for watching mate!

Very good! I rekon your gunna love it

@@meatheadmarksman2013 I am sure I will. I have the Crown in .22 as well and I am tagging them starlings out to 97 yards consistently. Just looking to get into some slugs shooting with the Impact in the near future. You have great videos and a great sense of humour, I enjoyed very much.

@@ARP-airriflepestings thanks mate! I would recommend the 700mm barrel if your looking to shoot slugs from your impact, much easier to get big power outta the slugs with the longer barrel

@@meatheadmarksman2013 i thought about it but 700mm might be too long for my pesting need. I will try out the 600mm and see how it goes. thanks.

Your gunna love it mate! Thanks for watching

Thank you for your kind words mate and thanks for watching! I'm planning on doing a slug tune in the near future. Hopefully a new user manual will be downloadable soon, I'd be happy with an up to date pdf from fx.

Following your recipe, I think I did pretty good for a first time PCP guy. My set up is near yours with a MK2 and 25 Caliber (using the exact same pellet i.e. JSB King Heavy MK2 @ 33.95 gr.), however I do have the Donny Fl moderator, and I'm using a SWFA 3X15X42 first focal scope. In my adventure it took approximately 135 shots into the bag to speed tune it and get the following final settings: • Final Valve Stop was at .40 inches • Mean speed was an 916.23 FPS the last ten shots • The Standard Deviation was 2.16 fps • The Extremes were 6.10 spread (low = 913.9 and high = 919) BTW I heard you say something about clay or sand dust... try some rubber mulch. At least rubber mulch around the sand. :) The regulator pressure was set at 138-ish (right side of needle on the 140 gauge mark). It took 6 shots to get the scope near zero, where I started shooting groups. 5-Shot Groups at 30 Yards. 91 F°/56% Humidity, Winds swirling at 10 MPH - Aug. 4, 2019. Group 1 0.280” (7.112 mm) Group 2 0.200” ( 5.080 mm) Group 3 0.200” (5.080 mm) I was going to reset the turrets, but I think I will wait on the slug barrel (still on back-order). I do plan on shooting with slugs 99% of the time. Anyway... pretty easy to follow your MO. I would like to hear your thoughts on Part B, tuning for groups... I will assume once you get the speed about right, then I would think you trade the chronograph for group sizes, and each adjustment is micro-moved at this point. But right now, I'm sort of happy, so I'm not going to fiddle with it anymore until the slug liner gets here. Again Uncle Hodge, thank you - I felt better doing this with a solid method, and data. Joe

@@josephmcguigan8273 good stuff! Group tuning basically follows the same method, if it's not grouping well then you just tune it up 5 to 10 fps- or down 5 to 10fps to have the pellet/slug exit the barrel in slightly shorter or longer amounts of time in order to leave the end of the barrel at the perfect node within it's vibration wave. I rekon yours will group just fin if it's shooting like that at 30m, stretch it out to 50, 75 and 100 on a calm day and see how it goes before changing anything. Make sure you weigh and sort your pellets to eliminate variables aswell. Good job on the tune and Wright up. Cheers mate

@@meatheadmarksman2013 Thanks Hodge. I have word from FX about the manual and the pressures. I will quote: "​We recommend the maximum pressure on the regulator to 165-170 bars on the MK2, they will take 180-210 but they will not be as precise at such a high pressure. Regarding the Manual, ​there will be a Mk2 Version out on our website within the next 2 weeks."

@@josephmcguigan8273 wonderful news! Good to know there's so much juice left... I'd imagine 170bar down the 700mm barrel would be dam near supersonic with a 25 cal... impressive! I'll certainly be downloading the manual when it's available

No worries mate thanks for watching

A couple of questions: when I start shooting I notice that the first shot and sometimes the second are lower velocity then by the third shot it gets consistent, is this typical? Is it sort or like cold bore shot in center fire and I should delete? Also I ran some mkii 34 gr for a 15 round string at the same settings, velocity dropped to an avg of 833 fps, extreme spread of 12 and an SD of 3. These numbers seem ok to me or is this really too low a velocity for the 34s? I only have access to my 10 yard range at home right now so no significant distance to check accuracy but at 10 they were all in the same hole.

Nice! Thanks for watching mate. Which barrel length/caliber did you go for?

I’m getting the standard length barrel in .177 and .22, tuning is a bit tricky as I’m in the UK and need a fire arms certificate to go above 12 ft pounds which I intend to do.

@@richardwaddams6598 I think you might need different internals to upgrade an sub 12. Defo worth double checking of you planning on converting to fac

Thanks for watching mate!

No worries mate thanks for watching

Send pictures to me on instagram im @unclehodge. Good to hear it's grouping nicely!

Thanks for watching mate! Whattayarekon? Air gun tuna stickers? Does anyone get my dodgy wordplay? Lol

@@meatheadmarksman2013 I would buy a few just get a giggle as I walk past the car. Love the idea

Cheers mate!

There WILL be a test lol

@@meatheadmarksman2013 Aw crud

cheers mate! i appreciate your kind words. thanks for watching

Haha I don't think you tube will allow me to make videos on gun AND with no pants on lol already kinda skating on thin ice haha thanks for watching mate and thanks for the shout out to the guns shop, if enough word of mouth gets around I'll be able to make more videos on cool stuff that I can't afford

That's a good question... I'm not really sure, my suggestion would be try it without mods first and see how it goes. You can always upgrade later. If you can get 900fps+ out of it with your chosen slug then I'd say you probably don't need upgrades. But if it's not fast enough to group nicely at long range then it's a green light for upgrades

pretty much as good as it gets im not gunna lie....

Meathead Marksman I’m going to get the .35 cal when it comes out then buy the rest of calibers eventually.

@@fathertimencUSA the 35 cal is nuts! So juicy

No worries mate thanks for watching. glad to hear it worked out for ya! Those are good numbers

I know rite! And so humble too lol

If it's consistent when it's maxed out then that's fine. What setting is your valve adjuster on? (The little one above the air tank and below the barrel) that should be wide open before you start tuning and when you find a good spot you wind it in until speed drops off

That’s good to know, I’ll leave my preload how it is. My valve adjuster is wide open. I am going to do some harmonic tuning with slugs when weather permits (50mph winds here in the UK).

I opened it all the way out again. My reg pressure gage was showing that it had settled a little bit lower then where is left it so I cranked it up a little bit again aswel

Groove completely

Turned out that my bottle gauge was reading about 25bar higher then what the pressure actually was. Highly recommend pumping up your gun to 250 bar and then tuning down to 175ish and fill again so you dont get too close to your reg pressure. I was actually "off the reg" when i did that, since replacing that bottle gauge (free under warranty) the valve adjuster has only made things better. Its a very useful part of the gun for tuning. You could also try swapping your reg pressure gauge with your bottle gauge and record what the pressyre difference is, just make sure you fill the bottle both tines and compare it to the filler gauge so its the same

Very silly rule... single shot loader from CARM will make your life much easier! Very affordable too

That's a good question, first off always always always do what it says to do in your user manual, that way you won't void your warranty. But it's my understanding that you can drop it something like a quarter turn, fire a shot, drop it another quarter turn, fire a shot etc etc. Even though I have a mkii It doesn't say that in my user manual... so if I have to drop my reg I'll be depressureing as per the instructions in the manual

@@meatheadmarksman2013 I will remove my credibility statement. lol... you seem rather knowledgable... good stuff !

@@shawnsponds I'm flattered that you thaught i had any credibility to begin with haha! if youd like to look into the different reg types just search "fx AMP regulator" and you'll be able to find the differences in the diffrrent generations of fx regulators. My advice remains the same though, just follow your user manual and you will have no trouble

Yes, the gun comes with the hard case. It's a nice case I like it

i havnt actually counted but id say 50 to 60. once you start throwing heavies down range at 900+ you chew up alot more air then if you run the 25gr

Usually when the mood takes me and I do weigh out ammo I make that decision based on what the spread of weights are and how many storage containers I have. I use those cheap Chinese food containers to separate them into 0.1gr increments and then put then into empty labelled pellet tins in whatever groupings that make sense with the number of pellets in each container

no. illegal for normal shooters

This is what I'm using: www.eurooptic.com/schmidt-bender-pmii-5-25x56-l-p-p4-fine-mrad-dt-ccw.aspx Cheaper option: www.opticswarehouse.co.uk/product/optisan-evx-4-16x44f1-mil-fhm16-reticle-riflescope/

Nope, they come to us either with no shroud at all (skinny inner barrel only) or as pictured in this video with the barrel support which looks like a shroud but has no effect on sound. Very loud

@@meatheadmarksman2013 barrel support .... I thought it was the shroud ! Anyway , excellent video!!

@@carsmax just for looks

@@meatheadmarksman2013 Thanks for infos !! Keep doing great vids !!!

@@meatheadmarksman2013 Sounds like the only thing you lack is the internal air stripper to direct much of the air into the inside of the support.

Wowee that a hot loaded 223! Haha sounds like a good dust free media to catch stuff with but

Whatever they are they still suck lol, not a huge deal but. I'm getting a new one under warranty so hopefully I'll get one that's accurate enough before the warranty runs out. If not I'll switch to huma

Thanks for watching mate! Standard kings I normally use the factory settings which is 125 to 130bar which will get you over 900fps

In my impact x .25 my reg is 110bar Bumper on 3 line And iam doing 880 ish with kings ,like to push it a bit more. I know my reg setting is low Is 920 to high for the Kings? Thanks once again Great channel

@ 920 seems fine, it's a good spot to aim for. Usually from the factory they come at 910 to 930ish, I wouldn't go any faster then 930 just to avoid stability issues bit 910 to 930 is pretty quick and doesn't use much air per shot

Great, i aim for 920 and see what grouping i get. Thanks

I like my impact better. The crown is great but you can do more stuff with the impact.

More tweakable, if that’s a word

@@martendavies yes! A longer barrel in a shorter package, bigger magazines, more power, built in rails etc etc

The big wooferdog is happy and warm in her bed giving me a dirty look for getting up so early and breaking her beauty sleeep haha thanks for watching mate

I need Your favour Bro.

@@syedmuftymehemud9981 sorry mate I did reply but it looks like it didn't post properly. Id say take it back and show the people you bought it off and see if they can fix it if possible, if not what is the actual problem? is the action not closing when you have a loaded magazine in the gun?

I use the hammer spring wheel like a volume knob, mine is very quiet on minimum power

@@meatheadmarksman2013 So, if I understand correctly, you are using the hammer spring adjustment SCREW to (finely) set the tension to optimum and use the knob for coarse adjustments (I.E. low power for in-barn pesting). Question: Once you have the Impact fine tuned to a particular pellet does twiddling the hammer spring adjustment not throw the whole balance and accuracy out the window?

@@hankvana2149 basically I tune it so the max setting is at the most powerful and efficient setting for what I want to use it for and then the lower settings are slower and quieter. Because they are lower then the balance point they are still useful and stable, just slower and quieter

What have you set your reg too? I'd probably start around 120 to 130 bar and do the hammer spring tune. I havnt tuned a 22 yet

@@meatheadmarksman2013 I am glad you answered buddy my reg now is 125 power wheel max gap power wheel 17.8mm from hammer line 4

I do have too huma extra high reg, but I can't get nice group after 60 meter

@@MrRavaneda what speed is it shooting?

Cheers mate! I have 25 and 30cal for this one

The starting point is tunded from the factory for jsb pellets, king 25. So if you are tuning fir a heavier pellet or slug you'll need more reg pressure and more hammer spring, if you are tuning for something lighter then that it will be less

@@meatheadmarksman2013 thank you. My reg pressure was set at around 155 when the gun was new so I recently re-set it down to about 140. I was sending jsb 25 grains out the barrel around 970 pfs. Since I re set my reg pressure, I need a starting point for my hammer spring and valve spring. Those are the values that I did not know where to start from.

Thats a good idea! I'm actually planning on making a heavy steel deflector type trap. Big wood box with an angled steel deflector that sends them into a nice deep thick wood box with sand or whatever else in the bottom. No more pita sandbag nonsense lol

@@meatheadmarksman2013 Haha that explains the welding helmet!.

Great video. If you get a chance try the original JSB 33.95. My Impact .25 700mm is more accurate with them at higher FPS. Mine is around 875 FPS. I never tried shooting as fast as you are. Maybe I’ll try it. Again I really enjoy your videos.

@@meatheadmarksman2013 If you are looking for a backstop of some kind; you could use seatbelts. A few layers of seatbelt wil stop most airgun pellets... Seatbelt-material is sometimes sold as sort of a tree-aligning-rope on a big roll for pretty cheap. Also, for my own backstop I'm saving up to buy a laptop-bag-insert from bulletproofeveryone.com It's just a rectangular pad that's bulletproof against small arms fire..

Tree aligning rope stuff on a roll: www.toolstation.nl/boomband/p18648

For your next gun or the next gun I tune? I'm not sure really if you mean for me haha, just whatever comes my way. Definatly gunna play with the impact for a while, make a few more crown videos and then sell the crown. I like the impact better, 700mm barrel is the bomb

Get both if you can afford it, if not go with the impact!

Great!!

SOme say the impact has numerous leaking issues..... Is this true?

amen mate!! I guess we have to enjoy what we can't take with us!!!Thanks for all the airgunning juju!!

Thanks for watching mate!

Your Crown and Impact tuning guide are the best on the Internet . I learnt a few things for my Impact

@@katrinacrown4148 Thanks mate! im glad they are well recieved. which caliber are you running with?

Nice! That's a great result for a number of different weights but seriously epic with the 26.8's. Your pretty much bang on there, so consistent that the only thing that could improve it is buying a more accurate chronograph. Excellent work mate well done

The Chrony is the Fx Radar finally got it to work with the rubber band holder.Set is 5 high power and 20% read The FX reads 7 to 10 FPS higher than a Chrony BETA. Bought the Huma Digital gauges and the Reg pressure reads 147 Digital and about 152 thereabouts on the factory Reg gauge. FX needs help there.Thanks again for the Tutorial. I appreciate it. T

I'll have to figure it out first mate, I havnt done mine yet cos it's already very nice

My quiet tune is about 30fpe. We dont have sub 12 here, basically for any airgun no matter the power level you need a proper gun licence anyway. I think it would be pretty tricky to get sub 12 out of a 25 or 30 with a power plenum haha

@@meatheadmarksman2013 you could go back to a standard plenum? Then do the "quiet rifle"? You are probably the best person on the interweb who is airgun Tuna. I'm an engineer and understand how it works. Your feeling it through is loads better than dry sticks.

I cant 100% remember but the manual I think says about 50bar

Thank you for your reply. Coz when i bought may fx and read the manual it says dont fire the gun below the minimum pres. setting but then i cant see in the manual what is the minimum pres. setting. Is it true if you continuily firing the gun below that minimum setting it will somehow damage the gun.

And additional question how to remove pressure on the regulator after removing the air tank?

Wouldn't be nice to have an underwater airgun lair... your hammer spring gap will almost certainly be different to everyone else's but if your shooting jsb king heavy mkii 25 cal try 145bar @15 To 18mm hsg

It’s 1013 mbar or hpa, which equates to 29.92 inhg. Both are the ISA(international standard atmosphere) if you balanced the entire world out at sea level and 15 degrees celcius. A go to amount if you don’t have a real time value. Even in aviation

In Australia it is $3300

send me a message on Facebook if you want, if you send me the numbers we might be able to make an educated decision on where to set the hammer spring and fine tune from there

Meathead Marksman i dont have facebook acount , can i send it by email.

hearing it fill is normal but that does seem a little bit heavy on the air, I would check the gauges against your fill source gauge to make sure they are reading correctly. also measure the gap between the front of the hammer spring screw housing block and the front of the little track that it runs in and let me know what that measurement is. should be like 18mm or somewhere near it

@@meatheadmarksman2013 My reading glasses say 16.3 mm. I adjusted the hammer spring when I was shooting today, I loosened it so I guess it was around 17. I adjusted until the speed dropped to 260 m/s then i tightened it a bit again. And the valve knob is 10.4 mm.

@@meatheadmarksman2013 Check the gauge, right. My hand pump gauge says... (lol) Sorry, I don't have a tank yet, maybe on Monday if I can find one. My pump also broke down. And the gunsmith managed to invert the filling sequence so that it fills when the handles goes up as if it wasn't tough enough to fill it before.

@@Bogi708 yeah thats rough I did not enjoy hand pumping up my crow when I had it haha it sounds like its about where it should be, 16 to 18mm is what they usually set them to at the factory. your valve nob is basically wide open at +10mm but, closing that down a bit will up the shot count but it will also drop the velocity. the thing about those king heavies is they use quite alot of air no matter which way you cut it. the jump from the 25gr king to the 34gr heavies is like 30% or there abouts, if you are hand pumping you might be better off with the 25gr pellet just cos youll get way more shots and have to hand pump less

@@meatheadmarksman2013 A tank is definitely a must have :) What is your shot count with the king heavies? With the previous set up (no power plenum) @140 bar regulator pressure I shot two magazines and the pressure dropped to around 170 bar from 250 bar and I shot them at 265 m/s and that equals 1.1 bar pr shot. And the hammer spring has been at max in both set ups.

Interesting! I'll keep that in mind, I actually had to send the gun back cos a seal or something in the back end failed and air was blasting out the back lol it did shot very well for a while after tuning though so I might not have had the same problem. Also my bottle pressure gauge was reading like 30bar too high which was giving me all sorts of confusing chrony results until I figured it out

I havnt done a 22 yet mate but have a look at the factory setting chart and if your shooting a heavier pellet then standard start with 5-10 bar more reg pressure, use a little less if your shooting a lighter then standard pellet

@@meatheadmarksman2013 ok, thank you for your reply, Im shooting 18.1gr jsb. The gauges are not at all accurate ive heard so my reg is sitting at (what looks like) around 145 bar. And with a hammer spring gap at like 15mm. Valve stop at like 3.5line.

@@meatheadmarksman2013 btw its shooting at around 870fps.

@@jamestaylor7782 is the shot string consistent with a nice low extreme spread? 870 is not bad, should be stable and quick enough to get the job done. I'd imagine you'd get close to 900 if you cranked up the reg and tuned it but with the short barrel I'd say that would probably be as much as you could get so if your happy with 870 I'd just leave it where it is

@@meatheadmarksman2013 thank you again pal, much appreciated. Il double check the shot string as my ES isnt as good as yours last time i checked, however i have power wheel set to level 4 (15mm gap).

ive seen other impacts shoot 25 cal 34gr jsb over 1000fps which is about 80ft-lbs, I dont need that much cos i have other guns that can do that, so id rather keep this one around 900 and get more shots per fill

@@meatheadmarksman2013 for me I tune my kalibrgun cricket to 62fpe and now I am witing for my 700mm slug barrel to push my .25 mk2 to the limit

@@fathifathi490 Sounds potent! thats right around what im shooting at the moment, i think 34gr at 917 averave mv is 63 ft lbs. I like the cricket but it seems like they dont sell them in australia :(

Depends on how heavy the pellet your tuning for is. I havnt actually counted mine out but it would be 60 to 70, somewhere around there I think. I might be wrong tho... Will have to check

What barrel you use? 700mm? Mk2 34gr

@@lasseeneroth8189 yup. 700mm/34gr. You'll get way more shots if you shoot the 25gr

Ok thats why, its like 40fps more in700bareel

@@lasseeneroth8189 yes, the 700mm barrel is a game changer. You can get a whole lot more power out of a whole let less regulator pressure

It depends on the particular slug but as a general rule 900+ your probably gunna get your best results. In most cases your pushing then as fast as you can. What caliber/gun are you using?

Meathead Marksman bought a .25 Impact MK2 still waiting on it. But wanted to get ahead of things LOL. I was thinking of the 29 Grain Nielsens.really appreciate you taking the time to answer my question

@@frankgonzalvo7651 no worries mate! Highly recommend getting the 700mm barrel for any slugs and in 25 and 30cal stick to the lighter ones where possible. Once you start getting up around the 40gr mark you'll be chewing through some serious air. 29gr nsa should be really good, easy to push them with an impact mkii

Meathead Marksman uh oh, got the 600mm. Again, thanks for the help. Cant wait to get my hands on the gun lol

Had Superlative results with theNEW 26.8 gr NSAIn a 25cal 700 mm Markll using slug liner See post above Tom

$3300aud for the gun

There are several different regulators fitted to the fx impact depending on when it was made, if youd like to search around and learn about them just google " fx amp regulator" and have a read of what comes up. Personally I like to decompress and do it the old way cos its quicker, but for small adjustments it might be quicker to do the shoot, adjust, shoot, adjust method, but onky with the amp reg, if you try that with the previous generation you you could damage it

gotcha... i didn't hear you say tune 1/4 and shoot, etc.. I have the newest version I suppose I will be safe and decompress anyway .. thanks for the video!