Doug, I just got back from a range session with Dennis Fleischer, fellow Wisconsin XP100 handgun shooter. So here is your target picture that you emailed to me.
Looks pretty good. I love it when they shoot that well right off the bat without any load development.
For the record, that was the conservative starter load that I suggested. My personal clone rifle uses a few more grains of the same powder and bullet but work up carefully.
Remember, Doug. The velocity with a given weight of powder will continue to increase as the round count goes up to maybe 60 rounds. So wait a while to start collecting drop data for use in ordering your custom Huskemaw