[este]

I'm debating whether or not simply having an adjustable gas head is going to cut it. I have not made any determination on port size on the barrel yet.

With a heavy contour 10" barrel I plan to put the gas block at 1.5" to 3" before the muzzle, and always shoot with the suppressor. I don't care if it won't cycle with the suppressor, actually I would prefer it.

I have no doubt supers will function. I'm just curious if 208, 220, and 240gr subs will eject, load a new round, and lock back on empty.


Does anyone have any experience with piston semis? I know Frank did a 552 but it sounded to me like anything lighter than 240s wouldn't work 100%.