I've been told Peterson brass is comparable to Lapua so I picked up 150 pieces of once fired large rifle primer 6 creedmoor brass from True Ballistics. After loading some up I instantly noticed the case capacity is nowhere near the Hornady brass I was loading. With the Hornady cases I could easily load over book max with IMR4831 and still wouldn't be compressed or hit pressure with a 105gr VLD, with the Peterson around 45gr tops the case off. Hodgdon's min-max for this combo is 41.2-45, I'm seeing pressure before I get to 43gr.. All cases were wet tumbled, full length resized with .002 shoulder bump, trimmed, chamfered, and deburred. Every charge weighed on RCBS triple beam, always checked at zero with a calibration weight.
Is the difference just that noticeable because it's a smaller cartridge? Am I just going to have to deal with this "awesome" brass giving me no noticeable benefit (so far), just less velocity?
Is the difference just that noticeable because it's a smaller cartridge? Am I just going to have to deal with this "awesome" brass giving me no noticeable benefit (so far), just less velocity?