If consistency is what creates tight groups, then consistency in primer pocket prep is as key as properly measured powder charges. If primers just go bang and the left over primer residue in reality make little or no diff., then why would anyone use bench rest primer?? Certainly the minor improvement of pressure consistency would be as unimportant as the residue that prevents the proper depth of primer seat to be had. Why trim the case .003 OAL if the .003 depth idiosyncrasy in primer pocket that you will likely have, shot to shot doesn't make a difference. I assume all the guys with race guns that set world records probably just knock the crap out of the pockets as you suggest, just because it's not important.
Also ,please quote an individual as was spoken (or typed), do not state things that are not claimed.
I did NOT say this: “Milling primer pockets will not give a 50% gain in accuracy of factory re-assembled ammo."
To quote myself “I de-burr flash hole as well, trim OAL, de-burr mouth in and out and outside turn for concentricity. My Savage shot a 5 round .192 group with this prep in wind on a rainy day from a bench. I believe I could have unloaded 5 rounds of factory Remington ammo, prepped the cases same way, reloaded and gotten a 50% improvement in factory groups due to prep".
I have specified that I can take a factory case and do a full prep on it, not just clean the PP, and get a 50% increase in performance. Please be advised, the prep is substantial, not just one step.
I have yet to throw 16gr's of 4227 thru my 8 inch 357, thats a stout max load, behind 158G JHP's and have a pocket loosen, after 10 reloads. I clean them all each reload (pp's I mean), ream them once (first reload). Trim every reload for OAL. I also get groups that I have spec'd on this forum that exceed the average or very good handgun, by a long shot, under any conditions.
Additionally, the tools that every BR shooter uses to compete, like the flash hole deburrer is probably insignificant and doesn't improve my groups either. I mean, it's just a hole that fire comes out of, right?? Why should it be unshrouded for top performance on a full case of slow burning powder?? The burrs certainly can't make a difference, right??
Accurate shooting is 95% prep (physical and mental) and 5% you squeeze the trigger. Why is this forum discussing the finite mad science of melted lead, lube, application methods, crisco shortening, etc if minor prep changes don't make a diference?????
HMM?? Am I chatting in the wrong forum??