DTA SRS 26" 1:8 twist
Silencer Tech suppressor
Nosler 140 RDFs at 2.203" to ogive
41.2 grains Reloder 16
CCI BR2 primers
Hornady twice fired brass
Avg MV: 2856 fps (Magnetospeed V3)
ES: 4
SD: 1.49
Yeah, I know those spread and dev numbers are pure luck, planets aligning, etc., but I'll take them for today! I tested 41.2, 41.5, and 41.8 grains. Avg MVs of 41.5 and 41.8 were excellent (2871 and 2887, respectively). SDs were under 10, and ES was low for 41.5, but at 41.8 the spread was 23 fps and groups started opening up. No pressure signs on the brass itself at 41.5 grains. Slight flattening and cratering at 41.8 grains.
Silencer Tech suppressor
Nosler 140 RDFs at 2.203" to ogive
41.2 grains Reloder 16
CCI BR2 primers
Hornady twice fired brass
Avg MV: 2856 fps (Magnetospeed V3)
ES: 4
SD: 1.49
Yeah, I know those spread and dev numbers are pure luck, planets aligning, etc., but I'll take them for today! I tested 41.2, 41.5, and 41.8 grains. Avg MVs of 41.5 and 41.8 were excellent (2871 and 2887, respectively). SDs were under 10, and ES was low for 41.5, but at 41.8 the spread was 23 fps and groups started opening up. No pressure signs on the brass itself at 41.5 grains. Slight flattening and cratering at 41.8 grains.