I know how to use the tools.
2.145 is max length at ogive touching the lands.
2.725 is the overall length with that bullet touching the lands.
Factory Federal Gold Medal is benchmark factory loaded ammunition recommended by GAP along with the Black Hills Gold.
The FGM 168s measure 2.8 OAL which has a .0725 jam. I have some 175s coming to measure and test also.
The FGM factory loads shoot VERY well in this rifle so I intended to replicate and improve its performance.
It is there .075 jam which threw me a little.
This is a GA Precision built rifle and they know how to build rifles.
I guess I will call GAP and ask them why the spec the rifle for jam with the recommended factory loads.
I'm curious how you determined that FGM 168s are jammed .075"? Is that just from comparing OAL with your loads? Better measure that again; the ogives may be different between the 168 SMK you measured and the FGM ammo. Even different batches can vary some, although not generally that much.
I have a hard time believing they'd chamber without significant effort at .075" jam; you'd have to push on the bolt handle hard enough to seat the bullet deeper. Are you closing the bolt with a mallet? If not, that .075" number is probably not correct.
