I have used from day one 180 abonds, with imr4350@64 grains, in my nosler sporter. The 180 partitions were pretty good also. The abonds were a tad bit better.
russ
Congrats on your new bang stick. You will love it. I have no regrets on mine. I just wish they could modify it to the detachable mag. Might have to get another one.
Russ.