It sounds like you are running this one pretty hot. You are likely sizing to the point that bolt close has light drag, if you are like me. As the brass hardens, it is my understanding that it doesn’t spring back much. Since factory actions usually stretch some, I think you are likely getting longer each firing and not able to bump it back much due to it getting harder.
I check my sizing after firing, after sizing, and before loading. I was running .002 - .003 setback, bumped it down to .004 setback for after last resizing. I guess hot depends on which published load data to believe. I do tend to run close to the top of published data. Like I said in my last post I will go all the way down a couple of more gn's. At this point I am doubting it is rounds and am leaning more toward a receiver/ bolt issue. But am willing to shotgun my approach trying everything. I still have to find a slower powder that has had success in other peoples rifles, still researching that
I would bet you are not to that point in the other rifles, or the case/die designs have slightly more leverage.
I have some Rem .260 that has over 15 firings, the 6BR brass last week was on it's 3rd
BTW, I’m not telling you to buy the AMP...my Annealeez works just fine.
I have a Annealeeze sitting on my bench. Have not used it in a year but will give it a try on 5 rounds this afternoon just to see. If that cures the issue I will will go back to annealing after every firing and rethink my opinion on annealing, if it do I will go all the way and get a AMP. In my opinion it is the best design, but that is just my opinion and we all know the old saying about opinions and odor lol
thanks for the suggestions
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