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To get into the rabbit hole deeper, a tuner would tighten groups and lessen vertical stringing of groups.
That said, with ammo lot testing for the .22lr, I would prefer less variables. Not that the human variable isn't the biggest difference in group sizes.
My new to me CZ 457 seems to like CCI SV (5 shots at 50 yards today, not too windy at Koko Head)
I have shot fewer than 50 rounds through this rifle but I think I'll stick with CCI SV for now.
A quick fix for sticky rubber is dusting it with talcum powder.
Give me $50 and I'll zero your rifle.
40 CPR? Dayum, you must be shooting some primo stuff!
I am guessing at least a few here are as well in order to keep this valuable pipeline operating.
Seeing what others have is always a factor, especially if the initial experience with them is positive.