yes sir
This is what I have been doing also after using a Lyman M die to save deburring and chamfering each case.
For bulk loading, it seems to be adequate.
I have seen movement for years. I do not mandrel any gas gun loads anymore. I have a custom-honed die that leaves about .006 tension. I would see about .001-.003 movement of the bullet after chambering (sometimes more, was kind of bullet/seating depth dependent). The crimp seems to solve the issue.
That’s good to hear. Always like to see or hear about results from multiple people. Thanks for sharing your experience as well.
That’s a pretty good FYI. I would have never thought a bullet would move with six thousands neck tension.
A couple thousandths can open up a group with a mag length round? Again, for a couple/few thousandths, it's going to change pressure how?
Yes. Try it for yourself. The OP found it to be true and I have myself with similar testing.
I've done lots of seating depth tests with mag length rounds over 15 thousandths difference in OAL. Sometimes, there's a very small change but usually I can't detect any change. This is with rounds that have optimized powder charges.
Have you measured to see how much of that neck tension remains after bullet seating? Your bullet winds up being a mandrel on that much neck tension. Do you anneal, and if yes, how often?
Have you done this in an AR15?
I stopped annealing for gas guns, didn’t see the results on paper or seating enough to matter for my uses and amount of firings I get out of my brass (pockets get loose).
Yes. I use a 223 AR 'spacegun' for competition. It's actually the only rifle, other than a 10/22, that I have.
