Gas block closed vs open velocity loss or gain

[David Milisock]

Wonder if 6arc has more bolt thrust than people that shoot 450 BM from an AR. I think those are like 38,000 PSI though but a 308 sized case head and heavier 250-275gr bullet. I shoot those from a bolt made for it at 52,000 psi.

I'm pretty sure there's a link to a bolt thrust calculator on the form.
My only concern when looking for a replacement CQB general purpose rifle was that it handle like an M2 30 Carbine in close, (the AR15 platform meets the weight requirement) reach out 600 yards+ accurately and operate at 52,000 PSI or less. The bolt thrust was just a product of meetings those needs and something to be mindful of.

The 52,000 PSI operating pressure allows long shot strings without throatling the bore on the first mag, maintaining long tern accuracy.