Mixing 223 Headstamps

[ironhead7544]

The Norma cases I used to have were very heavy and were a problem. I finally culled then all. I checked the case capacities on a lot of different brands and mil cases; not enough to make a difference IMHO. With a bench rest barrel it might.

If I were loading maximum I would sort. For general shooting I use a 55 gr with IMR4198 powder. Uses less powder at very good velocity. More bang for the buck.

 

[TexasShooter59]

Rem 700 (.223): same headstamp
M4/AR15: mixed headstamp

I use OCW for the bolt action, but for the others, I shoot groups with increasing charge weights for each group, checking for pressure signs as I go up.

One test I did recently with the semi autos was to have each cartridge in a group a different headstamp. I found a good group that way, and it took the mixed brass factor out of it.