Found some stuff for Canadian residents. Small for low pressure pneumatics but possibly useful.

https://www.shawcustombarrels.com/shop/ ... blanks/270

That stubby made me smile! Wild proportions!

So interesting! I was also considering modifying a current coax muzzleloader to have a longer barrel... if successful there is huge potential for adding rifling or choke or simply barrel length.

I've been thinking (uh oh) again about barrels. First, rifled chokes. I have a scrap .22 cal that maybe could be used as a rifled choke on the end of a smoothbore barrel. There is a hypothesis that a high speed slug slamming into the rifling might be bad for accuracy, but at pneumatic velocities pro...

twice scrap rate nice!

has anyone here tried a 10' muzzleloader? I whine about loading a 3'

Don't get me wrong, I love the elegance of the coaxial, but after I am finished my works-in-progress I think I will confine them to short barrel applications.

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Looking forward to seeing progress!

looks fun... I really need to make one too

propane doesn't behave with some rubbers; might be swelling the o-rings

When we switched from acetylene to propane at work we had some torch heads and regulators get fussy

lift off valve, sear release:)

Trigger feel as you design the trigger-sear geometry

Also saves on a blow gun ( I am extremely cheap)

I have wanted to do this for many years... thought 12 g hulls would be fun

I love it, and the breech is interesting too. I have often wondered why the electric airsoft guns didn't use a sear. It would give the trigger a more realistic feel, completing the firing cycle rather than starting it, and would allow better reduction through the gears so a weaker motor could be use...

I agree, that is a pretty extreme choke. I have used 1/2" valve on 20mm barrel. Valve has less than half the flow of the barrel, still good for velocities around 499 fps at bicycle pump pressures with light projectiles. If you want a significant portion of the velocity available then more flow is ne...

"Also included are two new categories of firearms that exceed safe civilian use. These are characterized by the following physical attributes: a 20 mm bore or greater and the capacity to discharge a projectile with a muzzle energy greater than 10 000 joules " Since that refers to 2 new categories it...