I've started comparing 55 gr vs. 77 gr performance in my FS2000.
The 55 gr I am using for comparison is PMC X-TAC. The 77 gr is Black Hills OTM.
The 77 gr groups much better, 1/2 to 3/4 overall group size of the 55 gr at 100 yds, but I have been surprised that the 77 gr shoots about 4 in. lower than the 55 gr at 100 yds. Has anyone else had similar experience with this?
Also I've been worried about loading the 77 gr ammo in aluminum (AL) magazines due to the length of the 77 gr cartridge and the reduced internal space of AL mags so I used SS mags for both (ASC SS mags).
The 55 gr feeds no problem but I get ~ 2 Fail To Feed jams on the 77 gr per mag. It is a simple jam. I rack the charging handle back and lock it, drop the mag and the failed cartridge falls out. It usually has a big dent in the body from where it hung up on the ramp and sometimes the bullet is jammed into the casing. Anyone have increased jams with 77 gr ammo?
I know Brownell mags are put forward as the best of the best mags but they appear to be AL only. Any concerns with reduced internal dimensions of AL mags and 77 gr ammo?
Thanks for any feedback.