My first experiences with salvaging primer pockets that were deemed "...too loose" by several of my early mentors were with Norma cases for my 220 Swift. At that point, the Swift had been mostly ignored by WW and RP for brass and Norma was all there was available. And while the runout and overall dimensional quality was great, they would rattle the primer pockets loose by the second or third firing.
The first thing I tried was
not uniforming the pockets before firing them the first time....letting the pockets 'settle', for lack of a better term. That gave me another 2-3 firings before they got loose. That's a practice I still do today, even with the excellent Lapua cases.
In the end, since they never leaked and dinged up the bolt face, I just quit worrying about it.
I still have a couple of Hart primer pocket tightening tools in a drawer of my tool box.
Good shootin' -Al
