FX Crown Harmonic Tuning Guide 

cant go out and shoot if you busy trying to stop someone from bleeding lol

I'm not sure if you guys run the Facebook page aswell but I wanted to say a big thankyou for sharing my video on there and helping my channel grow. I don't normally use Facebook but I might start now! I appreciate it very much. Cheers!

Thanks mate I appreciate your kind words. I hadn't seen anyone else do it so I figured I'd better get on it before anyone else lol

Oh cool! I don't use Facebook so this is wonderful news to me hahaha

Thanks mate! I'm in a similar boat with learning styles, I like to learn and teach through as many different means as possible but I'm mostly a visual/practice learner

Nice! Sounds like you found a sweet spot with such a low es, good mv too. Thanks for watching mate!

Thanks for watching mate! Hope it goes well for ya

Meathead Marksman It did thanks to you 👍🏼👍🏼

I'm always down for fart jokes and South African food! We are separated by 12000km of ocean but.... so probably wont happen any time soon lol

Thanks for the kind words and thanks for watching!

Knighted by a comment from Giles! You honor me sir. Now I rise anew as "Sir Unclehodge, Lord of Cakeshed"

AirgunGearShow oh Giles, we love you. You’re so entertaining 🤣.

You can do both! Hope it goes well for you mate, thanks for watching!

Thanks mate!

now worries mate thanks for watching! Which pellet are you tuning for? I havn't tuned a 22 yet but the factory specs are usually a good indicator of whats possible with a particular reg pressure. 130bar should be plenty. Generallllllly with pellets they are stable up to 930-940fps (depending on the pellet) so your issue with bad groups around 830fps might just be barrel harmonics, if it were going say 20fps faster OR slower the groups could drastically improve. food for thaught.

@@meatheadmarksman2013 22 cal. and JSB 18.13gr. I meant to say that, with the reg pressure set at 120 bar on the Huma, I'm only having groups smaller than 1" when the hst gives me ~830 fps. Above 830, groups are really bad. I used to have groups of 0.6" (avg) at 50m with the factory reg (130 bar) and ~865 fps.

Chrony and a rangefinder are the two thing that will improve your shooting experience more then anything else. Love my chrony!

@@meatheadmarksman2013 i already have a range finder. Now i just need the chrony. I will order one asap. I've found your videos very helpful. Thanks mate

You cant get the stock off with the safety still attached

Oh perfect, I have the impact and planning to get the Crown...thanks!

Cheers mate

Cheers mate! which stock did you go with?

I do enjoy a jaffa cake and a cup of tea every now and then. As far as biscuits go in Australia it's very hard to go past the top two biccys... Tim tams and Monte Carlos! Thanks for watching mate

Yeah for people who don't want to re tune every time they shoot something different I always advise to tune for the heaviest projectile at max and there will be useable settings for the lighter stuff further down on the hammer spring wheel somewhere. As for the gunpowder analogy I think an air fuel mixture might be a better way of thinking about it. Reg pressure is the fuel and the hammer spring is the air, you mix the two in a correct ratio to get explosive power

Thanks for watching mate! I see what your saying about the graphs, I did that because I wanted the lines to all fit in the graph, the line was so messy when I first started that I had to change the scale but I get where your coming from. I also had my chronograph numbers in there somewhere so it all seemed pretty buttoned down at the time. Hopefully I'll be tuning another impact sooner rather then later and ill make another video and keep that in mind.

Brilliant though i love watching you your interesting still playing with my crown cant seem to get any less than 5 deveation on fps

@@theyorkshirelad. I think this is where the impact edges ahead of the crown. If the crown had the valve overtravel adjustment you could probably squeeze that extreme spread down a bit more but when you only have a hammer spring to tune you have to move on to thing like weighing and sorting your ammo and other super fine adjustment tricks that are a bit above my level lol. In reality if your rifle is sub 10fps extreme spread you really are in the top 1% of what's possible with an air gun, or any gun for that matter so you have done a very good job

Nah mate I haven't needed to change the tune cos almost all my shooting is done on power 3 to keep it quiet. Its definitely doable though, if I where you I'd start at 150bar reg pressure and tune your hammer spring wheel from there. 900fps will be somewhere around 150-155bar. Just check your manual to make sure your reg can go that high. No magazine mods where needed for the mkii heavys either, just whack em in and get cracking

@@meatheadmarksman2013 Thanks, sucks u guys cant use suppressors tho. The only thing more badass would be dual wielding hahha, its magical and sorta unnecessary all at the same time i suppose #america.. i bought a chrony a few weeks back and just hooked it up, come to find out one of the censors has a chip in the lens so wont be doing any tuning for a bit. But again thanks for the advice and the video ive watched it like 5 times already. Cheers buddy

If your reg is "creeping" you should have the reg rebuilt (spring washers and o-rings replaced). The procedure for LOWERING the original FX reg is as follows. First you MUST DEGAS the gun. That means you remove the bottle and then you shoot the gun several times to remove the residual air from the reg and the plenum. Once your gun is empty you can lower the reg pressure (I believe that is clockwise) by turning the adjustment screw in all the way. Once it's in all the way, give it one half turn back so that it is not bottomed out, you need to have some pressure flowing through the reg in order to adjust it. Screw the bottle back in and your regulator should show the new setting which will be very low. Now you will begin adjusting the reg pressure UP (counter clockwise) until you reach 100 bar. This is where you can begin your testing and HS adjustment. You can continue to adjust the regulator UP ( ONLY ) which is why I had you start at a very low pressure. Should you decide you need to lower the pressure you will have to once again degas the gun. My .25 cal Crown is set for 130 bar and shooting 25.39 JSBs at 860 fps a very stable and predictable velocity for this gun/pellet combination. Hope this helps.

@@JoePatABC Thanks for the instructions. Reg creep might also be related to faulty gauge, sometimes when tapping it gives different reading -fx´s wika made gauges are notoriously poor quality and inaccurate. (considering replacing them with huma´s)

Thanks for watching mate! I prefer prone/lying down to a bench rest, I find it difficult to get comfortable sitting behind a table. Lying down is more natural for me and I can do it all day without getting a sore back

I hear you... What about a shooting rest/sandbag though? I would think you could improve your groups by having at least a rest for the stock to rest on!? However, you know best. : ). I own the FX Bobcat Mk2 and I am pretty happy with it. I just got it back from FX Airguns and they "tuned" it for me. Well, I should say "serviced". Anyhow. Thinking of getting something new though. Always wanted the Impact, but did not want to wait, so I got the Bobcat. The Wildcat Mk2 Compact looks nice as well... Thanks.

I use a sandbag under the butt of the rifle and usually run the bi-pod on the front. the saying "train the way you play" is a favorite of mine, i like to shoot at the range the same way I shoot in the bush, tight groups are nice and if bench rest is your jam I totally get it but for me practical shooting is what I like. if you like the bob cat you will love the impact, its a whole step up in every way, especially if you decide to sell the bobcat to make up some of the cost

I'm actually a bull haulage truck driver, i mostly deliver lime products with a pneumatic pressure tanker. at this very minute its 01:12am and I'm broken down at a mine site out in the Bush lol so... stay in school kids! I've been getting my ammo from Hermanns guns through shooters delight in qld

Hi guys. Greetings from Sydney. Potter Firearms is the official distributer for JSB pellets in Australia, and they deal directly with the manufacturer. Unfortunately, ‘cheap’ and JSB pellets don’t exist in Australia, something to do with being on the opposite side of the planet, plus The cost of the inspection processes at the pellet factory. The only way to reduce cost is to find a good batch number and order them in bulk, and Potter will mail order on viewing a copy of your shooters license. Less people in between helps keep the costs down. I have found them to be really good to deal with. I hope this helps fellow FX oz airheads. Dave

Awefffreereesome! Thanks for watching mate!

All good mate happy to help were I can. I beliebe the 30 is tuned for the 44gr jsb from the factory around 850ish from memory. Its listed in some of the fx brochures

Test and see how it shoots before changing anything, you might find that you get good results just by changing the transfer port to 17/22 setting and using a lower setting on the hammer spring wheel. If not, fx crown from the factory comes at 115 to 120 bar reg pressure and about 18.5mm of hammer spring gap

That's weird... It's good speed and nicely fine tuned so you should be getting closer to 100 shots. My first stop would be to check your gauges just to make sure they are not faulty

Meathead Marksman Thanks for the reply. But how do I check if they are correct or faulty, sorry if that’s a daft question!

@@Johnnywoo7 that is a good question, you can swap them around and see if they read different - if you put your bottle gauge on the reg and it reads higher then your previously specified 125 bar you'll know it's wrong. They are usually out a fair way, I've had to replace mine under warranty

Yes I believe the huma regulators will function the same way. I havnt ever tuned a bobcat but I'd be very surprised if FX didnt have some method of adjusting the hammer spring tension. You probably have to take apart the rifle to get at it. Maybe send an email or message to ernest rowe, hes the dude with all the know how. Hope it goes well for ya mate!

Apakah Anda berbicara bahasa Inggris?

emang anda mengerti bahasa indonesia

@@wahyusedotchannel1024 tidak pak, hanya menggunakan google translate. saya tidak mengerti komentar Anda sebelumnya jadi saya mencoba id sia-sia

I havnt tuned a 22 yet so I can't really comment with any authority, I would suggest following Rolf and Gerhard from the air hunters channel on youtube and Instagram because those dude are basically specialized 22 slug shooters/tuners. As for 25 is say start as high as your comfortable with, more reg pressure is generally better especially with a short barrel. I'd run it up to 150bar and take the hammer spring through is range of motion and see where the sweet spot is, I'd expect to see 870 to 900fps, then take it out and shoot some groups

You my friend are the best. Thank you.

Probably not the same reg pressure but the procedure will be the same. What pressure is it set on now and how fast is it shooting? 10bar more in reg pressure with the hammer spring set properly will get you about 30fps more muzzle velocity

I was told to put it to 140 bar and the hammer spring shouldn’t need touching so think will still trying your method over a crono

@@fxking.25 before you change anything shoot a magazine through the chrony and record your starting numbers. Theres a good chance it's already got a great tune from the factory. You only need to tune it up if your shooting a different pellet then the one fx recommends for your gun

anyone know what a fx recommends for .177 fx crown??

@@allenbowles1303 jsb exact 8.44gr but the smooth twist x barrel in your crown is less fussy then the old smooth twists so most pellets will work well or did you mean regulator pressure?

The process is the same but you may have to experiment with different regulator pressures

Microsoft Excel mate, made it myself

if you were to shoot it out of the stock the point of impact and group size would definitely be different, but thats not really what we are concerned with when were tuning like this, we just wanna make sure we have a nice low extreme spread and that the shots are efficient so that each round doesn't use too much air. after youve done that then you have to check how it shoots in the stock and if your group size is too big or not very consistant then you would tune again but go for around 10fps faster or slower and see how it groups

No worries mate thanks for watching! There's many a deep rabbit hole to fall down in the air gunning world...

its all about balancing speed with how many shots per fill you want to get, so if you want max speed and dont mind having to refill your gun more often youll get the highest speeds (900-920fps maybe a little less) out of 145 to 150 bar, but you should be able to get good usabble and accurate speeds like 860 to 880ish from 135 to 145bar, and then even less pressure if you decide to tune for the 25 king instead of the 25KHMKII

@@meatheadmarksman2013 ah I understand thanks that makes sence. Have you found that the 33gr mark II have a preferable speed?

@@seanbehan7761 faster the better in my guns, 930fps was 5 through the same hole at 50m in my impact, but lots of people have had great results around the 860 to 880fps mark

@@meatheadmarksman2013 Perfect it's all ahead of me so. Thanks for the information it's much appreciated. Great channel thanks again for your response.

@@seanbehan7761 no worries mate good luck with it all, if you run into any weirdness give me a yell

mine didn't, it was a gen 2 not the latest one with the amp regulator. I actually found it faster and easier to just take the bottle off and dump the reg pressure then shoot lower, shoot lower etc etc - my impact has the amp reg and i still just dump the air and adjust it instead of lowering under pressure

@@meatheadmarksman2013Ahhhh.. You are the Guru! Great vids, keep up the good work!👌

I used 140bar because that was Ted's suggested starting point. But in 25 cal 10 bar more of reg pressure with the correct hammer spring tune will net you about 30fps more muzzle velocity. More muzzle velocity means your shot will be affected less by external factors during flight but you must keep pellets under their maximum stable flight speed, too fast and they wobble or tumble and wont be accurate. Watch matt dubbers airgun ballistics 101 to learn more. I'll do some research and make a video about caliber specific regulator pressure choices soon

if any part of your manual says don't go above 150 bar that would be my advice to stick to. FX just released a bunch of guns with the new AMP regulator that can go much higher then the generation of regulators that are in yours and mine, id be very surprised to see rifles coming out of fx with the old regulators actually set to 160bar, its much more likely that its crept up over time. the previous generation can be a little creepy, mine creeps up to 155ish if i let it sit for a day or two but returns to my setting of 145 after the first shot. generally you can get good speed out of 150 bar even with the 30cal but if you want more power have a look at the huma regulators, they are the bees knees and can go up to 190bar i think and pretty much never creep

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-h6T4MoBNrro.html Impact for me now mate. Ended up selling the crown

My gap measures 15.75mm but that doesn't mean your gap should be the same. It might get you close but it wont be perfect

Thanks for the reply! Yea I expect to get out to the range and fine tune it more but thanks for the head start. Sounds like your country has the same rules here in Canada the silencer and airstripper are not used so it's nice for the info you provide being a little closer to this Crown version. Harmonically speaking. Your video has helped tremendously 😀 I would have wasted so much time and pellets. The hammer was set to the factory setting of 18 mm and I was getting terrible groups, I was going to guess at a setting of maybe 17 mm. Thanks mate!

Meathead Marksman just did some experimenting and I got the 33.9 gr. JSB shooting fairly good ~139 bar and 16.08 mm hammer spring, but still trying to get a better tune I'm at 700 meters elevation so settings are different than for someone at sea level.

@@Lorwildrose nice! I think I'm pretty close to sea level...

Meathead Marksman all thanks to you! Cheers mate, beer time. I appreciate all your videos and the work you put in. Just a update got really good results with the same reg and hammer setting(mm) but on Setting 3 with the JSB 25.4 gr and quiet too.

That may just be the limit for a really good extreme spread. I havnt seen an unmodified crown or impact hit 900fps in 30cal yet, it's very easy to do with a 700mm barrel but standard reg and 600mm seems to be max 890fps on the top performers

thats good to know i must have put the imperial one in my metric set

It took a fair few patches to get all that goo in the barrel out but I did that when I first got it. I haven't gone that high in mv yet because it's already doin so well at 870fps. When you say 895~905 do you mean with the 33gr mk2's? I'd imagine as long as you don't shoot them to fast and destabilize them you'll do well anywhere over 850ish

Nah mate sounds like its bang on to me! Just take it out and shoot it now :D

@@meatheadmarksman2013 Thanks man, will do!!

Which gap do you mean mate? On mine you cant access the screw without removing the stock and you cant remove the stock with the safety and the hammer spring wheel still installed.

Maybe it is not the same as on the Impact. I watched Stivs video on Impact and he did not unscrew hamer spring wheel, it is much simpler to max out tension on Impact then on Crown.

@@darthnihilus4553 yeah its a little different on the crown, the stock covers up that bit.

Do you want more or less speed?

@@meatheadmarksman2013 more speed of course

@@thangngaihte7519 I would lift reg pressure to 125-130 bar and tune the hammer spring, you should get 920 to 950ish out of that with the 25gr. If you go much faster then that it might not be accurate because of pellet stability

@@meatheadmarksman2013 thanks a lot Sir. One more thing sir...can you give me the ideal setting for shooting .177 jsb 8.44 grain...reg pressure /hammer spring tension settings ..etc.

@@thangngaihte7519 I've never done one in .177 but you should start at 100 to 105 bar and tune the hammer spring, if it's not fast enough bump it up 5 bar and tune

Yeah mate I'm a Queenslander. What problems have you had with the impact?

Meathead Marksman Basically grouping in all calipers .177 .22 and .25 I have been running the H&N pellets, field target trophy have been the best so far. The other styles are all over the shop. I have had a bit of a go at tuning you have given me some ideas with the hammer spring tension which at the moment I have maxed out. Anyway a lot more homework to do your tutorial has so far been the best I’ve seen.👍

@@gus1966 thanks mate! If your gunna run multiple calibers without re-tuning the gun each time you switch you wanna make sure your hammer spring tension is bang on for the biggest caliber and run it much lower on your smaller calibers, experiment with the transfer port too cos that's easy to switch back. Although other ammo can be good Fx designed the standard liners for jsb ammo and they are generally the easiest to use and seem to be more consistant in weights and shape

Yup search for "the meathead Marksman channel"

This was mentioned in the video and the accuracy test was pretty good so I'm happy with the barrel harmonics. Thanks for watching mate!

I'm not sure i understand the question, I will make a video about tuning the impact next weekend so hopefully that will help answer your question

What is the best fx impacte x fx crown ?

@@eldairfirmiano7181 oh okay, it depends what is more important to you. The impact has bigger magazine, can make more power and shoot bigger calibers, has picatinny rails and is smaller in size, but the crown is much cheaper and still very good. So if money is no problem go for the impact, but if you can only afford the crown you will still be very happy with it.

Did you swap the transfer port or the regulator? Or both?

I'm with you there mate, the people who make the laws in Australia have literally no idea what they are doing. They only care about fear mongering so they can say they have a strong stance on gun control and get votes from all the other people who are scared or ignorant about firearms and how nuanced the subject can be

Did you read my reply to your last comment mate? I think I'm gunna hve to make a video to explain this because it's seems like a very very very hard concept for some people to grasp that it's not a supressor and it's illegal for me to have one and that's why its loud. It's very frustrating giving to explain this over and over again lol

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-7PT8NBwzsP4.html

Is that at 150bar?

Nah just under a quarter turn between each shot or rather the amount it allows to spin it. Small adjustments allow for a more detailed graph to better diagnose where you wanna be

@@meatheadmarksman2013 Thanks! That's what I thought, but I wanted to confirm since you were saying "a turn".

All good questions! More hammer spring isn't always better, this video shows you how to find the most effective hammer spring tension for a particular regulator pressure, if you just max out the hammer spring without changing the regulator pressure it will actually loose power in most cases, you have to find the sweet spot, balancing the hammer spring and regulator pressure to get the most power. Congrats on the prize win that's an awesome thing to win! Your dreamline should be sweet right out of the box so shoot it before you start messing with the tune so you know weather or not you actually need to tune it

@@meatheadmarksman2013 Ok, great. Thank you!