Some ammo always shoots better than others, but I never thought to measure rimfire bullet diameters.
I just checked two brands with my cheapo $10.00 Sears mic's and found a CCI Stinger at .224 and a
Rem target at .225. Actual diameter may be off but the Rem is definately .001 bigger.

I just joined this forum today and it has paid off in the first few minutes. (My check will be in the mail today).
I will pay attention to this newly recognized variable and hopefully select better ammo. This may be useful for selecting
good batches of ammo from not so good. Great topic. This should get results.

I just bought a Savage Mark II, FVXP. Just finished cleaning all the preservative from the bore and am on the way to the
range