So after bedding my MPA and the scope base and lapping the rings, my groups definitely shrunk, and although they are not all that impressive I think if I can figure out where the vertical stringing is coming from this can be a .25” - .33” gun. I may need to mess around with the brake, as JBartons experience has indicated.
In the photo with 6 groups, those are 2” dots. They are 1” in the other three.
I’m shooting from a rest on an old rickety wooden spool, so that’s one of my problems I need to address. I’ll be shooting from an RRS ascend/anvil normally, but for load development I wanted free recoil. I was also racing the rain that day so I might have been subconsciously rushing the trigger too. First set of groups are what I was getting before bedding/lapping.
Range is 100
Load: ELD220 on 76.2 Gr. of R25 in Hornady brass with CCI #34 primers (all I have) bullets seated .002” from the lands.
Rifle:
MPA BA ultralite
Bighorn Origin
Proof Carbon prefit
TT special
PA hypertap brake
Vortex AMG 6-24 in Seekins rings (picture is from another day)