Your 700 7mmSaum was quite a workhorse for you, factory chambering then the 9.3 Barsness Sisk on the 350 case, and then the 6.5 PRC . Was it throated shorter than SAAMI, or just worked out most accurate loaded that way ?
The 6.5 PRC chamber is SAAMI standard--but the action's magazine is too short to allow bullets to be seated out to the SAAMI max of 2.950" overall length. Instead of installing a longer magazine, I decided to test how the rifle would shoot with bullets seated to fit in the magazine--and it turned out the two I wanted to use most (the 127 Barnes LRX and 129 Nosler AccuBond Long Range) were noticeably more accurate when seated deeper.
