Thanks for all the great info. I did finally get the 230 RN to finally touch the rifling and push the rim up out of the chamber but it was barely in the case mouth anymore and mic'ed over 1.4 to get it. I also recently purchased a chrony so I know what my velocities are and can actually test with real results. I made some dummy rounds at 1.27 and they feed fine from the mag.
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