I was using a 10% reduced charge of H335 with a 123 gr bullet. This part of fire forming went fine, but after one or two firings of the formed case with a worked-up load with IMR 8028 and a 123 Hornady, the primer pockets seemed loose when priming.
I realize the reformed cases were of a different internal volume than my Hornady 6.5 G cases, but I started low and worked up, but never could get any good velocity as the primer pockets were enlarged.
Gave up on the effort, and stayed with my Hornady cases. My barrel is Stainless steel 18" from Brownells, with matching head-spaced bolt head.