To avoid bullet setback, I load up some dummy rounds and chamber them multiple times after getting a caliper measurement on the overall length. When I had a setback problem after 6 or 7 chamberings, I slightly reduced the diameter of the expander plug (chucked in a drill press and polished the diameter down just a bit using red and/or gray ScotchBrite) until there were no more setback problems.
Cloudpeak
I carry my own (Wait for it...Here it comes)