Seafire,
That's the plan if I can't get better results with a different shooting form. I have Varget, Re15, and a little 4064 (I think) on hand to try. It's not that I particularly want to use a real slow powder, I'm just looking for accuracy. Velocity and powder choice are secondary, always.
I also noticed that the outside neck of the cases fired with Retumbo have a distinct spot where the soot line moves forward toward the mouth, goes about 60 degrees around the mouth, then back down toward the shoulder, sort-of like a square wave. Soot on the neck doesn't surprise me given the slow powder, but the "square wave" pattern makes me wonder if the chamber is out of round, or something.
I will probably find out eventually what I'm doing wrong. Then it will be like the commercials that say "I could have had a V8!" while slapping my forehead.
