Airgun Experts DONT know this...PCP Hammer Spring 

Adjusting the hammer spring as done in the video is actually used to increase/decrease the velocity of the pellet, (use a chronometer to check the velocity). A byproduct of increasing/decreasing the velocity is increasing/decreasing the hammer tension because you're adjusting the trigger to release more or less air during the shot. More air released means more trigger pressure, (Trigger Pull Weight) to release the amount of air to get the higher velocity. One thing to remember about adjusting the velocity is just like anything else... you drive the pellet too fast and the flight can become unstable and erratic, just like too little velocity can do the same thing. The goal is to find the sweet spot where the pellets you like to use fly the same with the best consistency. After all, consistency is what we want. One last thought... what is good for one pellet, may not work for the next. This is the reason we do so much tuning with the different pellets, record the information and set the rifle to the best setting depending upon which pellet we're shooting. Once the velocity is set where you want it, you can then adjust the "Trigger Weight Adjustment" screw to increase or decrease the "Trigger Pull Weight" were you like it. There are 3 Trigger adjustments under the rifle in and around the trigger guard. There are holes in the trigger guard to provide access to these adjustment screws. The first adjustment is the trigger sear, which makes the trigger "more touchy" and can lead to accidental trigger actuation if adjusted too light. The second adjustment is for the Trigger Weight, which makes the trigger harder or easier to pull, (this is what was being measured in the video) and lastly is the Trigger Travel Adjustment. The travel adjustment simply moves the position of the trigger backwards or forwards and makes the trigger "feel" like it's not travelling that far to actuate a shot. This information is in the instruction manual as to the location of each adjustment with a very brief uninformative description of how each adjustment works. I'm not trying to chop up the video... just trying to provide more information on all the trigger adjustments available on the avenger. Great Video by the way..

The king now that's funny.

Adjusting the hammer spring has always made the trigger harder on all airguns typically and it has been talked about a lot especially in Crossman where people put adjustable Hammer Springs on them

when you increase the hammer spring tension on a sear type trigger the trigger weight will always increase its just a fact of life unfortunantly

Appreciate the video bud.. I pretty much have kept mine very close to what came from the factory as for setting. However I have added a walnut stock, aluminum barrel band, and a upgraded barrel end cap with built-in baffles that extend down into the shourd about 5 inches , which tightens up any kind of play or movement . I'm very happy with this rifle. It's been a real nail driver

U can a adjust the trigger itself to make it liter

I love thus trigger, idgaf what anyone says, 10 years in the army, many weapon platforms and this pcp is perfect for me.

Adjusting the hammer spring I saw in another demonstration also increased velocity.

Please go through the process of adjusting the 3 trigger screws. I would like to get the let off weight close to 1 pound.

you should have titled this beginners don't know. if the trigger is what holds the compressed spring and you increase the pressure what do you think is going to happen? and it got lighter when decreased? no way. lol it's most likely more apparent in a cheap 300 $ pcp.

Once you have the HS adjusted to your liking, can you re-adjust the trigger pull to what you feel comfortable with? Thanks for the info

In the video and comments I keep seeing or hearing “tension”, that adjustment is altering the compression of that spring, not the tension, two totally different forces.

The Sear holds the hammer the more load you put on the hammer the more friction it puts on the mating surface between the sear and the hammer. Polish it and see this improve significantly.

I wouldn’t think a couple of oz trigger pu;; would make that much difference unless it also altered the way the trigger reacts such as first pull or break , Thanks for the info though >

Es lógico que se ponga algo más pesado el gatillo, por otro lado si dejas el resorte al mínimo tu válvula no abrirá completamente con presiones de más de 1500psi.

That aint so bad, better than the 8lb trigger on my crossman break barrel np

what does that do for FPS

Excellent video.

Excellent presentation!! thanks. new sub . . . kept forgetting to hit SUBSCRIBE, but your videos are DataDriven, like mine, and i respect DATA DRIVEN content! You do not exercis conjecture, so thank you. Happy Grouping Therapy!

Increased tension equals more friction? Mind blown!

Awesome info I wonder if it does that for all pcp air guns 🤔

Thats with every sear type trigger. Of course, when you increase hammer spring tension it's harder for the sear to break.

This is info for beginners, explain to us the operation of a balanced valve and electronics in Daystate AG theirs solenoid hammer ...

Here a question you might be able to answer. I have new qb cheif with adjusting allen key . What is the factory pre set on it . Mine has zero preload on it with bolt closed . But when you put the bolt arm out and move it back about 4 to 5 mm. It starts preload. Why i am asking is it seems a air hog .my gauge on my gun might be off . I use the gauge on the pump to 2000 the gun shows 1700 . Here what going on the first four or five shot are hot and hit 2 inches high at 20 yd then by 6or 7 it settles for 10 or so even shots then start to fall fast . So my shot count is about 18 for a 22 cal . It should be more right. Ca you give me some advice.

how to adjust velocity in an pcp air rifle adjust the trigger tension in or out?

Your results are specific to the Avenger so far. Food for thought though.

Chris Kyle American sniper said he liked his trigger about 2 lbs. He said he liked it to surprise him.

Well, Tom Gaylord is the Godfather of air guns but ...............................King?

HEY JAMES..U REALLY ARE THE AIRGUN SCIENTIST NICE JOB 😋👍 ⭐ ⭐ ⭐ ⭐ ⭐..BUDDY

So all you would have to do is adjust the trigger

Dude, it barely has a full pound of adjustment. Not even actually. I'd have thought it would be tunable from 4 or 5 lbs down to 2 or just under. That was all at the same regulator pressure setting though right? Isnt there a relationship between between reg setting, hammer spring, and where the trigger weight falls? I would think they have an effect on each other in some way. I know you mentioned turning the reg up from stock to get the velocity you wanted down range. What did you turn your reg up to and what are you getting fps? That would tell me a lot from there. I know what the trigger does now based on where you're at. But if you tune the reg back down and don't move your hammer spring will the trigger weight stay the same?

You're confusing ounces with tenths of an ounce.

It's about 20%

I can't get to move the hammer spring bolt...already twist three Allen wrenches. Any idea why?

Welcome, your majesty 👑

How much will the FPS change from the lowest to the Highest settings on the hammer spring

I will give amazing advice... PLEASE don't use chroma

Hey James how many Hammer Springs turns does your Umarex origin have mine only has about 4 and 1/2 turns is all the turns that i get out of it.

What bothers me the most is the creep..