My Recent Range Trip, one problem.
Posted: Tue Sep 10, 2019 7:11 pm
My 300 BLK build is a BA 8.4" barrel with a Standard pistol length gas system. Not adjustable. Also I am running a standard Toolcraft BCG, I do have a Bootleg BCG for the pistol if I ever suppress it. I also have a LaRue MBT-2s trigger. The first time I went to the range with the gun I had numerous problems, failure to feed and last round not locking back, etc. I scrubbed the chamber extremely well, and changed the Geissele Super 42 spring and H2 buffer to a standard carbine spring and standard buffer. I just returned from the range and was delighted that I only had issues with one brand of ammo. The 205 gr Sig Sauer Subsonic hunting ammo. This ammo was in an DH Magazine branded 300 BLK. This ammo is really strange looking, it has a relatively flat point with a plastic tip and the cartridge is about 1/8" longer than the Fiocchi 220 gr Subsonic I also shot. The Fiocchi was an absolute joy to shoot, virtually no recoil and much quieter than the supersonics I was shooting.
The issue I had with the Sig ammo was the first two rounds would fire and chamber, then the third round would jam with the point up in front of the chamber. I also had a few instances of the last round (even with Supers) not locking the bolt back. Not regularly but about three times with 9 different magazines. I have a Nemo light weight recoil spring, would that help the issue? Do you think the issue is magazine related? This magazine has a red follower and doesn't seem to be as anti tilt and smooth as my 300 BLK Lancer magazines. I didn't get a chance to try the ammo in multiple magazines as I only had a few rounds of this ammo (over $1 per each), but I will schedule another range trip to try any ideas you suggest so I can shoot this ammo.
The other Subsonic ammo, the Fiocchi was so nice to shoot, I started looking at suppressors on the way out of the range. I'm looking at the SilencerCo Harvester 300 suppressor. What are your feelings on this choice?
Thanks, Rick
The issue I had with the Sig ammo was the first two rounds would fire and chamber, then the third round would jam with the point up in front of the chamber. I also had a few instances of the last round (even with Supers) not locking the bolt back. Not regularly but about three times with 9 different magazines. I have a Nemo light weight recoil spring, would that help the issue? Do you think the issue is magazine related? This magazine has a red follower and doesn't seem to be as anti tilt and smooth as my 300 BLK Lancer magazines. I didn't get a chance to try the ammo in multiple magazines as I only had a few rounds of this ammo (over $1 per each), but I will schedule another range trip to try any ideas you suggest so I can shoot this ammo.
The other Subsonic ammo, the Fiocchi was so nice to shoot, I started looking at suppressors on the way out of the range. I'm looking at the SilencerCo Harvester 300 suppressor. What are your feelings on this choice?
Thanks, Rick