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308 subsonic

ii open

Private
Full Member
Minuteman
Jun 7, 2013
8
3
PNW
So a friend sold me 1k plated 308 150gn bullets for cheap and I figure I'd play with it for subsonic ammo. Started off at 10.5gn trail boss, then 10gn, 9.5gn and 9gn. All were 5 shot groups each. Anyway, each group had all stabilize but 1. 16.25 barrel 1:11 twist

From left to right: 10.5gn, 10gn, 9.5gn, 9gn
2m27y3a.jpg


Not really looking for accuracy, just don't want to ruin my suppressor.

Any ideas why all but 1 stabilize?