B,
I think Kragman was referring to rimfires.. but darn nice group.Reminds me I have to try sone Varget in my new .308
Off a bench or other solid rest, I personally believe a heavy barrel makes more difference in grouping in a centerfire than a rimfire rifle. Recoil and barrel harmonics being much more violent/erratic in the centerfires.
As to the CZ rimifires ,going back about 15 years when the m452 varmints and Americans first were being used in great numbers, shooters reported that the Americans were at least as accurate and maybe a bit more so than the Vamint models.
I think this had more to do with the difference in the bedding and action screw setup between the two models.
The American had two action screws-rear one at the tang with the dovetailed recoil lug and the front action screw just behind the magazine. The barrels were free floated.
The Vamints had one action screw behind the mag and the front screw in the dovetailed recoil lug ON THE BARREL.
I think the Varmint models were more touchy as to how well bedded they were at the factory, and that may have accounted for the accuracy issues with some of them. The bedding could be a bit uneven and caused some stress on the action and barrel in places.
Properly glass bedded - almost any CZ 452 usually shoots lights out with good ammo .