Re: 6mm Ackley Improved question
With a 1-10 twist but different cartridge, I was doing better than 0.5 MOA at 500yds with the 75 SMK. 75 gr bullets have a low BC and you need calm days to get very far out with them, unless of course you just enjoy the shooting which can be a lot of fun when the winds are tricky. Currently being rebarreled to a 1-8 twist for 105-107 gr bullets.
The Smokin Fur Rifle Club