After 1 or 2 firings you will be back to your typical remington load is what I have found.
Huh? mtmuleyAfter the case expands to chamber dimensions you can load up the same way your rem cases are loaded.
Knew that. What I'm saying is you can't fireform brass of one manufacturer into the larger capacity of another. The outside dimensions do not change enough. Maybe I'm wrong or am misunderstanding what Lrt307 means. mtmuleyfrom what I've seen the nos brass is a bit thicker... tossed one of my nos 300rum on my scale... 285 grains... a rem at the same case length is 15 grains lighter at 270 grains... more brass weight typically means less internal volume and higher pressure at a given powder charge...
Knew that. What I'm saying is you can't fireform brass of one manufacturer into the larger capacity of another. The outside dimensions do not change enough. Maybe I'm wrong or am misunderstanding what Lrt307 means. mtmuley
Think of it this way. A stick of 7mm brass measures 2.100 new. Once fire formed they will match whatever the chamber dimension is. Say 2.120. Measure the datum line with comparator and it's easy to see. Think of a small block Chevy engine with a 64 cc combustion chamber. Holds less space than a 76cc and creates more psi. Same scenario with brass that has not been fire formed. I have shot 270 7mag and 300 rum with Nosler brass and don't care for the fact you can't use your Remington or Winchester brass loads until you fire form Nosler brass. Once that happens it seems to work fine for me. I have learned the hard way trying to put my Remington and Winchester brass loads in Nosler right off the bat and it will blow the primer pockets out amongst other things.