O.S.O.K. 1961
Active Member
I have chosen SS-109 version of M855 62 grain penetrator rounds for my prepper stores. I've found that this stuff (Privi Partisan in particular) is very accurate in my AR - it has 1:7" twist and 14.5" barrel (with pinned flash hider to make it over 16").
I did see an interesting youtube about M855 vs M193 with fmj bt 55 grain bullet and it basically showed that the older version actually created more disruption in the media than the 62 grain M855 - though the new round did penetrate a little further. It also found that the 55 grain version was more accurate - or made smaller groups.
I've found that my rifle puts 5 rounds into 1-1.25" at 100 yards consistently - with a scope and from a rest.
I decided to settle on one specific type so that I wouldn't have much variation in point of impact changing from one lot or case to another. The SS019 Privi Partisan can be found for a good price too. But I do have Federal as well.
I could have heavier rounds as well - they'd stabilize in my carbine due to it's fast twist and I could just record the difference in drop and record the clicks needed to adjust, but I use KISS as much as possible with my preps.
What's your choice? Or do you have multiple types?
I did see an interesting youtube about M855 vs M193 with fmj bt 55 grain bullet and it basically showed that the older version actually created more disruption in the media than the 62 grain M855 - though the new round did penetrate a little further. It also found that the 55 grain version was more accurate - or made smaller groups.
I've found that my rifle puts 5 rounds into 1-1.25" at 100 yards consistently - with a scope and from a rest.
I decided to settle on one specific type so that I wouldn't have much variation in point of impact changing from one lot or case to another. The SS019 Privi Partisan can be found for a good price too. But I do have Federal as well.
I could have heavier rounds as well - they'd stabilize in my carbine due to it's fast twist and I could just record the difference in drop and record the clicks needed to adjust, but I use KISS as much as possible with my preps.
What's your choice? Or do you have multiple types?