I went through the same thing with my XD. It seems to have a short throat, or whatever. Anyway, those style bullets I had to seat really deep to get them to chamber.
I ran a test ( different gun that doesnt care ) with W231 seating at 1.125, all the way down to 1.085, and recorded the results from my chrono.
When I get home tonight I can post the results, if that helps you.
JIM
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