Originally Posted by DesertMuleDeer
It's been awhile since I have played with 7mm Mag, and I think I forgot how anemic 7mm load data can be. ..


I am shooting 11 gr more than max per Hodgdon 140 gr H4350 7mmRM.
At 13 gr more than max, I see the threshold of extractor groove growth, a repeatable precursor predictor of loose primer pockets.

I have used that load in factory 7mmRM rifles and in rifles that I reamed the chamber and cut the threads.

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