I’m my AT im running the 168 sierra tmk with an oal of 2.915, cbto is 2.235. I’m my chamber this puts me .030 off the lands. Shoots very well. It also shoots the 175 mk equally well at the standard 2.81.
I use 41.6 grains of ar comp in Norma brass with a br-2 primer for the 168 and 40.3 for the...