We chrono'd a few different rounds today in a new gun, BCM 11.5 SBR, SOCOM RC mounted. The numbers came in a bit lower than expected. Such as:
Federal XM193 2766 fps
SSA 70gr TSX 2295 fps
BH 50gr TSX Optimized 2931 fps
SSA 77gr SMK 2178 fps
SSA 55gr TSX 2470 fps
10 rd strings, average fps. 700ft elevation, 60 deg. The barrel has less than 200 rds on it. All are 5.56 loads.
These are lower than (unverified) velocities for these loads I have seen reported in other reputable places for an 11.5. The XM193 is within 100fps of said reports, but the others are quite a bit slower.
Does anyone have any comparable data for any of these?
These velocities put frag ranges for the XM193 at 25 yards and the 77 SMK comes out of the bore slower than the frag threshold. Tolerable for expansion ranges for the BH50 and SSA 70, (153 and 218 yards respectively). Not great, but ok as these are my two SD rounds.
Federal XM193 2766 fps
SSA 70gr TSX 2295 fps
BH 50gr TSX Optimized 2931 fps
SSA 77gr SMK 2178 fps
SSA 55gr TSX 2470 fps
10 rd strings, average fps. 700ft elevation, 60 deg. The barrel has less than 200 rds on it. All are 5.56 loads.
These are lower than (unverified) velocities for these loads I have seen reported in other reputable places for an 11.5. The XM193 is within 100fps of said reports, but the others are quite a bit slower.
Does anyone have any comparable data for any of these?
These velocities put frag ranges for the XM193 at 25 yards and the 77 SMK comes out of the bore slower than the frag threshold. Tolerable for expansion ranges for the BH50 and SSA 70, (153 and 218 yards respectively). Not great, but ok as these are my two SD rounds.