I prefer to shoot a 75-77gr bullet but during the shortage I grabbed some 69gr CC. A guy I work with and I have nearly identical rifles by the same company so I use both guns to test loads. Our chambers share very similar dimensions.

Anyhow, both of these rifles absolutely love 69gr CC and Reloader15 over CCI BR-4 primers. His averages .5-.6MOA and mine has done this twice this week:

Nice group. What is the barrel twist rate? Ever tried a 10-shot group?