Hornady rimfire thickness gauge

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Hornady rimfire thickness gauge - RF17

Sorting ammo by rim thickness will provide ammo with similar ignition qualities for improved accuracy. This proven technique is used by competitive shooters & varmint hunters. The rimfire gauge attaches to your caliper & includes bushings for use with all .17 & .22 rimfire calibers. Wear lanyard around your neck & attach caliper to promote safety.