So I bought a big of mixed headstamp 222 a few months ago, and as I'm going through it I find a bunch of pieces that are already primed, sized ,chamfered and ready to shoot. So I think this great and start loading all of these for my load development on the new 222. So my now I have shot and loaded over 50 of these brass and I'm getting crummie groups. So I happened to be talking with my guru last night and he tells me you can't used mixed head stamped brass for load development because each different case will have a different capacity, giving different degrees of ignition.
So I had some new brass that I went and neck sized and re-did the loads that were lousy and VOILA a couple of real nice groups.
Lesson learned. FS
So I had some new brass that I went and neck sized and re-did the loads that were lousy and VOILA a couple of real nice groups.
Lesson learned. FS