K&M - Custom Gauge Pin Size:0.2015 Keeps firing pin and all

Keeps firing pin and all moving parts working as low as -50F below zero

making them 100% brass free and 100% barrel safe

Chamfers the inside case mouth to an angle of 14°

At the same time it “bumps” the shoulder of the case to maintain excellent case neck concentricity

Illuminated reticle - Yes

K&M - Custom Gauge Pin Size:0.2015 Keeps firing pin and allMeasures neck inside diameter Checking your Case Neck with Gage Pins: After expanding use the corresponding gage pins to confirm the neck sized as expected. The feel you are looking for is a light drag on the gage pin. When sized properly the gage pin will act as a piston as you push the pin into the case neck while holding your finger or thumb over the primer pocket. You can actually feel the air compress inside the case. Quite often the brass can be