.67 MOA group is AWESOME from any rifle, and very awesome from a repeater. I'd love to try that recipe if you don't mind sharing it...a pm would be cool if you don't want to put it here out front. That is a great!
Not much luck here with IMR-4064 with either 150 or 165 gr Sierra Game Kings. I'll have to try this powder with the 168 gr a-max. The a-max did do well with Reloader 15. What powder charge weight did you use and what is your COLTO (cartridge overall length to ogive)?