Piledriver Carbine .457

very nice !!! i bet its going to be awesome !!

Looks much better with the short barrel. I'd rather loose power than carry that lone barrel around too.

Be sure to keep us updated. Really curious how the accuracy will be affected more so than power. Are you changing any springs or whatnot to use less air? I would think ( usually gets me in trouble) that the factory tune is set up for the added barrel volume and reducing that could mean wasted air because the slug is exiting the barrel much earlier than before.

FWIW mine loves the NSA 350~ BT-HP for accuracy and the knurled bthp’s are my top choice hunting round. 

Yes SqrlHntr is correct. WIth the short barrel there will be a huge blast of air behind the slug, which is going to destabilize it and waste air. Tune the hammer spring down then work you way back up.

Just thought of another thing, might be too much to matter or im just dead wrong so ill pound sand if it is or i am.. but the 34” barrel has a 3rd harmonic at about 22.6” so another inch and a half or so off would put the muzzle real close to a node. When you said 10” it made me look where I tuned a limbsaver resonator, and its right on/at about that 3rd harmonic spot about 12” from the muzzle…Just a thought if its squirrely even after some hs adjustments. Here I go thinkin’ about airguns again and on a Sunday morning when I should be in church praying for a 60/60 FT card. 

Don't read into that Node stuff. Different guns, different barrel thickness, different tension on the barrel, different pressures, different valve timing; there is no way of telling. Besides its unregulated. Pressures and so called "nodes" will be changing at every shot. 

Don't read into that Node stuff. Different guns, different barrel thickness, different tension on the barrel, different pressures, different valve timing; there is no way of telling. Besides its unregulated. Pressures and so called "nodes" will be changing at every shot.

Click to expand...

Hear ya loud n clear. Pretend it never got posted. No need for that rabbit hole here, apologies all. 

That's a lot of barrel still, with the right slug and tune. Let us know how it works out as far as accuracy, fps numbers and final slug weight goes.

Make sure the crown is good. 

Looks so much better with the shorter barrel, and you still have plenty length in that barrel

Yea, it's good!

Cutting 10" seems like a bold move. Would you mind putting up projectile/chrono details for before & after the mod?

nice work buddy ... cant wait to see your deer this year

nice.... i have not see poop with how hot its been ...

Great work! Looks like you got a keeper! Still a lot of power there!