I record everything with o-give but measuring with calipers OAL is about 3.665. I jump it at exactly .010 which is just barely under mag length for me. I seat based on jump rather oal. I have had the most luck with 76.5 gr h-1000. I also set neck tension at .02 and I am pretty meticulous with brass prep.
Also as is common sense anybody reading this make sure you work up to this load just because it works safely in my gun doesn’t mean it will do the same for you.
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