My "most" fun gun is a Ruger American standard in 243 Win with a 9 twist. It shoots both 80g Hammer Hunters and 70g Varmageddons at 1/2" at 100 yards with the same POI. I just got rid of the rotary mags and put an AI mag kit in it, got it from Ruger customer service shipped for $25. Shot it today for the first time and it feeds and functions great, much better than the junk rotary mags.