I may not be a good reference for this but here goes. I own An 1100 yard range and shoot prs. I shoot a lot at 1000-1200 yards. For my match rifles my brass pre/loading process is pretty simple. I run A 6mm creedmoor and use Hornady brass and Berger 105gr vld hunters. Honestly never trimer, never chamber, and never debur. I spray the brass down with Hornady one shot lube, run it through a Hornady fl bushing die with the neck tension set at .003 and bump the shoulder back about .003 prime my cases with an old rcbs ram primer dump my powder charge a little then trickle till I hit My charge weight then seat to .02 jump off the lands with a Hornady micrometer seater. My SD is 3 speed is 3077. Groups very well but I dont really shoot for groups any more since I got Away from bench rest and fclass. I used To do more brass prep than I do now but I’m kinda lazy and this minimum effort approach is working pretty good for me. I usually Place pretty high in club matches in my area, up around 7th outta 40 so I’m pretty happy with my brass prep method. But again that’s whats been working for me.
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