10-20-2020, 04:27 PM
The torsional load variation as a function of timing and unlocking is an excellent subject to bring up relevant to bolt lug life.
Its why the gas system really needs to be managed with optimum port diameter and flow rate into the Stoner Expansion System formed by the bolt and carrier.
I like that you mention this with suppressors being a major variable that throws the gas system behavior out of balance.
This is why I use Bootleg carriers for anything suppressed.
I also noticed that cyclic rate on a Ballistic Advantage 12.5 barrel with the smaller port worked really well suppressed, whereas many report unreliable function with the same barrel unsuppressed.
I also like that Growler brings up the often overlooked part, the barrel extension.
AR15 barrel extension tooth length really limits the working pressure of the cartridge once the diameter goes up on the case, unless youre willing to invest in exotic alloys like AerMet for both the extension and bolt.
I actually like the lower pressure behavior of 6.5 Grendel where things arent near the edge of getting away from you.
You really see the benefits of this managing the sight picture through the shot, and on brass life if youre a reloader.
Even if youre not a reloader, spent cases retain value almost as if they are new because it doesnt really matter with 1x firing, especially on Lapua brass.
Its why the gas system really needs to be managed with optimum port diameter and flow rate into the Stoner Expansion System formed by the bolt and carrier.
I like that you mention this with suppressors being a major variable that throws the gas system behavior out of balance.
This is why I use Bootleg carriers for anything suppressed.
I also noticed that cyclic rate on a Ballistic Advantage 12.5 barrel with the smaller port worked really well suppressed, whereas many report unreliable function with the same barrel unsuppressed.
I also like that Growler brings up the often overlooked part, the barrel extension.
AR15 barrel extension tooth length really limits the working pressure of the cartridge once the diameter goes up on the case, unless youre willing to invest in exotic alloys like AerMet for both the extension and bolt.
I actually like the lower pressure behavior of 6.5 Grendel where things arent near the edge of getting away from you.
You really see the benefits of this managing the sight picture through the shot, and on brass life if youre a reloader.
Even if youre not a reloader, spent cases retain value almost as if they are new because it doesnt really matter with 1x firing, especially on Lapua brass.
NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com