09-29-2022, 05:41 AM
Short answer to that is gas port location absolutely has an impact on......
Cyclic rate
Cyclic rate has major impact on.....
Early extraction or correct window for extraction relative to carrier velocity and bolt unlocking.
20 RLGS is one of the most well-behaved gas system/barrel length configurations.
CLGS anything is one of the more difficult to deal with, always has been since the XM177, XM177E1 (10 guns early-mid 1960s), pretty well worked-out with the 11.5 XM177E2.
Alexander Arms early catalog of options included 10.5 6.5 Grendels.
Now imagine a school-trained engineer from MoD, who got specific guest instruction from Eugene Stoner himself, who also was charged with repairing/depot-level overhaul on UK SOF Deimaco Colt Commando carbines.
When doing his due diligence on the short CLGS models, he builds full-auto test apparatus/guns, pressure test breech, and develops his own proof loads along the way.
You think that maybe he worked out these details? Gas port diameters, chamber specs, has to work with standard carrier weight and buffers so when people slap them on their lowers, everything works.
These are the kinds of thinking and background that went into 6.5 Grendel development. It wasnt just 28 barrel target rifles, 24, and 20, but a wide range of barrel lengths and gas port locations.
This was all coordinated with Saber Defense, Les Baer, Precision Firearms, and anyone who wanted to license reamers before making their own rifles and ammo.
So there is a very professionally-developed TDP for every barrel length and gas port location combination that AA did along the way.
The short barrels and CLGS can be made to run well without any of these issues.
Port size is one of the biggest factors in getting that right, along with FSB or gas block seating on the journal.
The rest of the gun starts off with the assumption of a TDP spec, which very few AR-15s adhere to.
Cyclic rate
Cyclic rate has major impact on.....
Early extraction or correct window for extraction relative to carrier velocity and bolt unlocking.
20 RLGS is one of the most well-behaved gas system/barrel length configurations.
CLGS anything is one of the more difficult to deal with, always has been since the XM177, XM177E1 (10 guns early-mid 1960s), pretty well worked-out with the 11.5 XM177E2.
Alexander Arms early catalog of options included 10.5 6.5 Grendels.
Now imagine a school-trained engineer from MoD, who got specific guest instruction from Eugene Stoner himself, who also was charged with repairing/depot-level overhaul on UK SOF Deimaco Colt Commando carbines.
When doing his due diligence on the short CLGS models, he builds full-auto test apparatus/guns, pressure test breech, and develops his own proof loads along the way.
You think that maybe he worked out these details? Gas port diameters, chamber specs, has to work with standard carrier weight and buffers so when people slap them on their lowers, everything works.
These are the kinds of thinking and background that went into 6.5 Grendel development. It wasnt just 28 barrel target rifles, 24, and 20, but a wide range of barrel lengths and gas port locations.
This was all coordinated with Saber Defense, Les Baer, Precision Firearms, and anyone who wanted to license reamers before making their own rifles and ammo.
So there is a very professionally-developed TDP for every barrel length and gas port location combination that AA did along the way.
The short barrels and CLGS can be made to run well without any of these issues.
Port size is one of the biggest factors in getting that right, along with FSB or gas block seating on the journal.
The rest of the gun starts off with the assumption of a TDP spec, which very few AR-15s adhere to.
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