I did shoot today and will post a full report when I get to a PC (on my iPhone now at the pool) but I don't know off hand what happened to your groups, but 200gr XTP over 9.2gr LS should probably be 8.2gr. I've shot up to 9.4gr but HORNADY max is 8.2.
Is that a typo?
Also, I will day that your case splits look like a brass defect not a over pressure but I could be wrong.
I'll get on an post this evening with a full report as promised but I will say, in short, Gator378 and I had a great day at the range!
10 Ring #1033 - Longslide #1045 - 10mm Loader #1066
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Why do I carry a 10mm?
“Because a 9mm only kills your body… the 10mm kills your soul.”