I just use CCI standards, as they're subsonic anyway. Never really understood why they have a standard that is below the sound barrier and a subsonic variety.
I'd like to try the subs and see if they're more accurate than standards as they could be better. CCI standard and winchester subss are both about the same accuracy in my 22 but I get the odd winchester round that doesn't cycle my 10/22 so stopped buying them.
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