Ryan, Thanks for the above tip on loading data. That's a great site. I just returned from the range with the newly 9.3x57. I tried two modest loads with IMR4895 and Varget. Both gave satisfactory groups. I found in loading that I need more throat in the new chamber. The Hornady 286 gr. had to be seated all the way to the cannelure in order for the bolt to close. I'm looking forward to trying it again when I can seat bullets out a bit further.

Bill Ferguson