Well after some struggle to figure out why my BCM mk12 wasn't holding groups, i finally figured out my scope rings were loose. Anyway shot 18 shots through the chrono today and only had two errors. Stats are as follows.
Ammunition: SWA Run N Gun 77gr SMKs
http://www.southwestammunition.com/product_p/55677smk-rng - case.htm
Distance: 100yds
Rifle: BCM MK12 MOD 1 18" bbl
Temperature: 57F
Chrono results:
2708
2682
2737
2707
2717
2714
2686
2658
2583
2647
2685
2700
2706
2708
2688
2679
Avg: 2687fps
SD:35.8 ES:154
I'm not sure if that's good for a gas gun or not, my bolt gun's loads have a SD of 4.5 and ES of 11. I guess i could throw the oddball out that was 2583? Group to the left is mine to the right my friends. If i only could've held the 4th shot
the shots on the left group not in the 4 shot group were sighters.
Ammunition: SWA Run N Gun 77gr SMKs
http://www.southwestammunition.com/product_p/55677smk-rng - case.htm
Distance: 100yds
Rifle: BCM MK12 MOD 1 18" bbl
Temperature: 57F
Chrono results:
2708
2682
2737
2707
2717
2714
2686
2658
2583
2647
2685
2700
2706
2708
2688
2679
Avg: 2687fps
SD:35.8 ES:154
I'm not sure if that's good for a gas gun or not, my bolt gun's loads have a SD of 4.5 and ES of 11. I guess i could throw the oddball out that was 2583? Group to the left is mine to the right my friends. If i only could've held the 4th shot
the shots on the left group not in the 4 shot group were sighters.
Last edited: