11-05-2014, 10:27 PM
It will be load dependent on the margins if you have a buffer and recoil spring weight that is more tailored for one type of charge weight and bullet weight.
With the RLGS and a .094" port, they are usually pretty forgiving, so that anything from a carbine 2.9oz buffer, up to an H3 will work.
Since you have the Tubbs spring, I think a carbine or H2 will be fine. I use H2's with the 16" MLGS, .078" gas port, with a SAAMI chamber done by AA. I think Bill A. said he has good results with that combo as well.
I have seen plenty of 20" guns that run well with carbine springs and 2.9oz carbine buffers, and I have also seen 20" guns run well with standard rifle buffers (5.2oz), as well as JP SCS, and Enidine buffers with the Tubbs spring. Since the port pressure is more tame on a RLGS, and the volume and dwell time are good with .094" port/20" pipe, it seems to be more stable than say an 18" MLGS.
When you buffer it up and go to the range, use Hornady 123gr A-MAX or SST as your baseline if you can. Start with one round in the magazine, and see if it chambers ok, fires, extracts, ejects, and locks the bolt face back against the bolt catch, not the bolt carrier face.
Then look specifically at what clock direction the brass has ejected to diagnose your gas system and cyclic rate. You preferably want 3:30-4:00 ejection pattern.
With the RLGS and a .094" port, they are usually pretty forgiving, so that anything from a carbine 2.9oz buffer, up to an H3 will work.
Since you have the Tubbs spring, I think a carbine or H2 will be fine. I use H2's with the 16" MLGS, .078" gas port, with a SAAMI chamber done by AA. I think Bill A. said he has good results with that combo as well.
I have seen plenty of 20" guns that run well with carbine springs and 2.9oz carbine buffers, and I have also seen 20" guns run well with standard rifle buffers (5.2oz), as well as JP SCS, and Enidine buffers with the Tubbs spring. Since the port pressure is more tame on a RLGS, and the volume and dwell time are good with .094" port/20" pipe, it seems to be more stable than say an 18" MLGS.
When you buffer it up and go to the range, use Hornady 123gr A-MAX or SST as your baseline if you can. Start with one round in the magazine, and see if it chambers ok, fires, extracts, ejects, and locks the bolt face back against the bolt catch, not the bolt carrier face.
Then look specifically at what clock direction the brass has ejected to diagnose your gas system and cyclic rate. You preferably want 3:30-4:00 ejection pattern.
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