This group looks promising.

That's a nice one for sure!!!👍👍

I'd test a tenth or two either side of that and see if it holds together.
This was actually a seating depth test. The SDs were fantastic on all groups shot, so I'm happy with the 71.5 grn of 7828ssc I'm using. As far as seating is concerned, the next group that had the bullets seated 0.006"deeper was 0.40" group. I think I'm onto something!
 
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