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CZ 457 Varmint

I also have a CZ 457 Varmint, very accurate but always looking for that little bit more. Does anyone measure / sort ammo by rim thickness for consistency and accuracy?
 
I also have a CZ 457 Varmint, very accurate but always looking for that little bit more. Does anyone measure / sort ammo by rim thickness for consistency and accuracy?
This is the latest thing. Sorting rimfire ammo by rim thickness. Don't know if it works have not gone down that particular rabbit hole.
 
Some of the people I shoot with weigh match grade amo, one to the closest 0.02 grains. I can stay with him using my Walther KKM against his Annie. I also haven't gone there yet.
 

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