I posted this in another thread here yesterday. Today I'm going to run some more with 66.7gr N165 at a longer 3.3020" COAL.
Just ran some N165 thru my 22" proof barrel (~130rnds) ,
175gr ALBRs seated to 3.2600" COAL, or 2.5855" Ogive
Fed 215 primers
Hornady once-fired brass
Temp 52 F
The group averaged 2MOA, but I was in a rush because it was starting to rain. The last two rounds settled in closely. I also changed the neck bushing in my sizing die from .312 to .310, giving me aabout 0.004" neck grip. Maybe a bit much, but the .312 felt really light when seating. That said, I ran ALBRs, seated out to 3.300" with Staball HD and got 3/4" group with the .312 bushing.