I can finally pick up mine tomorrow!10 months wait.
I have the steel challenge. I'm first going to sight-in with my 147 loads and run a match this weekend.
Already have a 70 and a 60 lock pieces ordered. Going to do some testing with different PF factors versus bullet weight. I would like to eventually run cheaper 115. Looking for minimal dot movement versus recoil. Recoil has never been a problem with 9mm.