Hornady - LNL Rim Thickness Gauge 17-22 Rings Machined internally to accept 3/8"

Machined internally to accept 3/8" dia

Utilizes case shoulders to center & trim(Not for use on straight wall cases)

you will need a Modified Case (sold separately) to fit your firearm's chamber and thread it onto the gauge

equipment is not waterproof and is not intended for use in the rain

Hornady - LNL Rim Thickness Gauge 17-22 Rings Machined internally to accept 3/8"Sorting ammo by rim thickness will provide ammo with similar ignition qualities for improved accuracy. This proven technique is used by competitive shooters and varmint hunters. The rimfire gauge attaches to your caliper and includes bushings for use with most (not compatible with 17 WSM) . 17 and . 22 caliber rimfire ammo.