TalonP, talon tunes heavy hammer, tuning

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MrP

MrP

Member
Apr 29, 2020
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New Lebanon, NY, USA
I’ve asked this before but am asking again in case someone with information missed this. I’m wondering if anyone here has any specific experience with tuning the talon P and the heavy hammer with the “slap mod” that quiets the hammer noise when it strikes the breech slide. 


My question is, is this hammer really too heavy for this gun? Stock was 65g I think, this is 30g heavier.

it seems to work well enough but not with the reduced top hat. I was trying that out today shooting with the very smallest top hat valve cap and noticed that when I dialed up the power, the gun got much louder but the pellet didn’t have much more energy. I am guessing the heavy hammer is bouncing and extra air is getting released when it happens. Makes me think either a) the heavy hammer is a mistake in general or b) it is pointless to use high spring tension with a greatly restricted valve cap. I am leaning towards “b” because with larger caps it has good power range with the power wheel.


So I’m wondering if anyone has a suggestion for a combination that worked best for them, given the options of the stock or heavy hammer, the ring loc valve kit, and maybe some O-rings behind the top hat?

i have a chronograph and am slowly collecting data but can’t yet make sense if it. 
 
I have an older talon. But I won’t run a tiny insert with full spring kinda counter intuitive. But at least you now know that doesn’t work. I’d imagine your correct it’s bouncing..

Btw have you found an Airforce forum walk-through guide if you will I’m jumping into the Air Force rifles but I’m about a decade too late, and now that OC Bolding has passed, he was my greatest resource for the Air Force guns. I know I’m lost. 
 
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Doing some more chronograph testing but not recording entire shot strings to look at fine tuning. That’s next.


Still enjoying messing around with the top hats and heavy hammer and spring tension settings. It’s a lot to sort out without a controlled approach. I have a plastics chronograph with an aperture to set your muzzle in. I wish I had one I could just shoot over - would lend itself better to getting lots of data as it allows more natural shooting. 


Shooting with the largest aperture top hat, the lowest power I get (in the peak tank pressure range) is around 38 FPE. This is shooting jsb exact kings and h and n grizzlies. I don’t think the talonP shoots the grizzly slugs fast enough. Pretty much in the mid to upper 700’s and am I wrong to thing that this is too slow for a bullet shaped projectile? Accuracy is as good as pellets at 10 -12 m (limit of my garage range) but I suspect they won’t be accurate at 30 or 50 m.


I want to get a .22 LW barrel for this - 18” ideally or a 12” possibly. Guess I should post in the classified section... want to avoid any scammers. Worry a bit about getting a damaged barrel or something and not having the knowledge to tell until it is too late.


of any of you have suggestions for sourcing a used .22 barrel for a TalonP I’m all ears. 
 
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Read recently you can buy a BRAND NEW 20 cal 12" barrel for $55 from Talon Tunes. I'd try the 15.9 JSB Heavies for that.
Click to expand...

I went looking for that but don’t see much in the way of barrels for sale. A 30 cal kit and one other unrelated barrel. Some FX barrel liners. 


maybe this is something he offers through word of mouth?


Honestly I was going for .22 in part because of pellet price and availability so I think in that sense .20 will be harder to stock than .25? Or am I way off?
 
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I certainly can’t find anything wrong with it especially because I am not a marksman and not bitten by the “most expensive gear” bug yet... i only paid $425 for it new, and with a hand pump I am having decent pcp fun for not a whole lot of money.


Well one thing. Loud. Don’t want to spend $150 on a moderator and $50 on a simple adapter... just doesn’t seem reasonable. But I will get one eventually I know... in the meanwhile de tune to 20 FPE and the noise is not bad at all. Just need light pellets like h and n field trophy or else I will be shooting at 600FPS which can’t be good, right? 
 
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New Talon P owner here. Been doing some testing and thinking and this is the conclusion I’ve come to with the gun.

The fastest it can shoot is around 900 to 950 FPS due to barrel length. Regardless of how much air gets released, the pallet leaves the barrel too soon for it to accelerate fully. With that being said, I believe the reason it can turn up so high is so that it can shoot heavy slugs at 800 to 900 FPS. I was reading, and one guy said he was getting 72FPE with 46 gr slugs, I believe. So the heavy hammer mod would allow for 50 to 60 gr slugs to be shot at 900 FPS. The reason I believe this is because when I Chrono’d the gun with the 26 gr pellets, the gun got louder and released more air the more I turned it up, but the pellets didn’t go any faster. Just a guess I ordered the heavy hammer mod, and I am going to test it and see the results.
 
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It has been a while since I’ve chronographed that airgun.

The velocity depends very much on the weight of the pellet - a more useful piece of information is the muzzle energy.


I recall getting 60-70 fpe, up to 80 with heavy slugs. So 48 grain slugs I cast shot in the 800’s. Jsb’s at over 1000 fps no problem.

Air Force guns are a little different than others in that the weight of the projectile influences how much energy you get out of the valve more than usual. Has to do with back pressure keeping the valve open while the projectile is in the barrel. Heavy projectiles spend more time in the barrel so the valve stays open for more time and more energy is transferred to the bullet.

So when you look at the energy you get out of a heavy projectile like a 50 or 60 grain slug, you won’t be able to shoot lighter pellets at the same energy levels.
 
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