04-11-2017, 05:09 PM
The best way to approach adjustable gas is away from the port, like Savage did with the MSR-10 using a cylinder in the block, as opposed to a set screw over the port.
The problem with choking the port and increased erosion is that you end up chasing your port erosion with more choke, especially on softer steels like many stainless barrels are made from.
Since Grendel has such low working pressure from the start, I doubt you'll see rapid erosion on RLGS, but on MLGS and CLGS, it will happen faster, especially if the port is too large from the start.
Another problem with adjustable gas is carbon-welding, which has been really problematic for me using the set screw designs.
It would be interesting to do a length borescope analysis series of checks over a long round count, looking at port erosion between 2 different barrels of the same make, one choked, the other not.
The problem with choking the port and increased erosion is that you end up chasing your port erosion with more choke, especially on softer steels like many stainless barrels are made from.
Since Grendel has such low working pressure from the start, I doubt you'll see rapid erosion on RLGS, but on MLGS and CLGS, it will happen faster, especially if the port is too large from the start.
Another problem with adjustable gas is carbon-welding, which has been really problematic for me using the set screw designs.
It would be interesting to do a length borescope analysis series of checks over a long round count, looking at port erosion between 2 different barrels of the same make, one choked, the other not.
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