I wonder if the seating stem is different on rcbs vs redding?
I think its more based on the seating die not being the competition version. I just loaded my 338lm rounds using my competition seater and the majority were .002 or less. So I have a comp seater on the way for my 260...
Bodywerks,
I had a conversation a couple weeks ago with the gentleman that does reloads for me. He mentioned he had been having some issues with run out when pressing Berger's and A-Max. I think he uses Redding equipment but cannot assure. In any case, he did some deep investigating and determined the stem in his 6.5 die was not fitting the more slender Berger and A- Max bullets correctly, which was causing the run out. He just ordered dies with a stem better suited to the bullet type. PM "Hessian" for more precise info.