Well I did an H-1000 ladder test today and I was not disappointed. Started at 76-and went to 78. I never had an SD over 5. Seated out to 3.600 (mag length).
76 was at 2910 with an SD of 3.6.
76.5 was at 2915, with an SD of 4.6.
77 was at 2941 with an SD of 4.6. It was also about 3/8” group
77.5 was at 2960 with an SD of 2, but slight pressure, very slight ejector swipe, and a small crater. 3/8” group.
78 was at 2980 with an SD of 5. A little too much pressure though. Ejector mark was deeper, and crater was deeper.
I think I am going to try the 77 grains. There was a very slight primer crater, but nothing else.
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