I quit all primer-pocket cleaning, flash-hole deburring, etc. etc. many years ago, after testing its effects in a very accurate .223 that averaged 1/4" 5-shot groups at 100 yards. The only factor I found that made any difference was sorting or turning case necks for uniform thickness.
But a lot of handloaders like to dink with stuff, and apparently it keeps them happy.
I'm one of those handloaders who likes to dink with stuff. I have found a repeatable process that works for me and gives me peace of mind. I like to manage the variables that I can manage.
