Okay so I got a 300 PRC Christensen Mesa a while back. I'm just getting around to working a load up for it before elk hunting and while trying to come up with a seating depth, I made an odd discovery. The lands in my rifle are at 2.910 based on my hornady gauge. I measured this literally 10 times thinking I was doing something wrong and the result was always the same. This seemed short so I measured a factory Precision Hunter 212gr eldx and came up with a measurement of 2.915. This suggests that I'm jammed into the lands on factory ammo... Additionally, if I load .010 off the lands with my 200gr Terminal Ascent bullets, I'm under the min OACL specified by SAAMI. I'm not really sure what to make of this yet as I haven't fired any test loads yet but I wanted to know if anyone else finds this strange. I am trying to look through the drawings on saami's website but I'm having a hard time figuring out what numbers I should be looking at.
The factory ammo didn't seem to be showing pressure signs in the form of flattened primers and as far as bolt lift goes, it's a brand new rifle so I have no baseline. I started my load workup halfway between min and max and I'll definitely be making some loads all the way down to minimum now to be on the safe side.
Can anyone tell me based on these drawings what distance I'm supposed to have to the lands? This just seems too short and really hamstrings my ability to load for it. saami
I found a post on another forum where people seemed to be having the same types of issues with their guns having super short chambers also so I'm not super optimistic..
The factory ammo didn't seem to be showing pressure signs in the form of flattened primers and as far as bolt lift goes, it's a brand new rifle so I have no baseline. I started my load workup halfway between min and max and I'll definitely be making some loads all the way down to minimum now to be on the safe side.
Can anyone tell me based on these drawings what distance I'm supposed to have to the lands? This just seems too short and really hamstrings my ability to load for it. saami
I found a post on another forum where people seemed to be having the same types of issues with their guns having super short chambers also so I'm not super optimistic..