Hi
I have used a Sako Quad with the Burris quad scope in Millett rings, using .22LR and .17HMR barrels. Could not use a bigger scope AND change barrels. Return to zero was close, but not exact-- still got 1" groups at 50 yds though. Accuracy was great. With .17HMR and Federal ammo, 3-shot groups at 100 yds averaged under 0.4" . Was talked out of that rifle and now have one with just .17HMR barrel. Have a larger scope , 4-16 Weaver, so find gopher heads a bit easier. Ran out of Federal ammo, but groups with Hornady are OK, about 0.5" at 100yds. Have ordered the newer 9-Rd mags. I don't particularly like the stock, but performance is the main idea! Trigger is good, which certainly helps.