7.89 gauge gun bore/muzzle wear with ramrod

gauge gun bore/muzzle wear with ramrod. A quick and accurate indication of barrel/throat wear.

The kit is designed for quick measurement of the diameter along the bore fields of a rifled weapon to assess the degree of its wear.

Provides match shooters and varmint hunters an easy, convenient method to determine remaining barrel life.

For calibre:

8x57 IS (JS)
8x57 IS IRS
8x64S
8x68S
8x33

Kit specification:

gauges qtty 8pcs
gauges length 75mm
gauges tolerance ±0.002mm

gauges dia:
nominal diameter 1 pcs + 6 pcs with a step of 0.01mm + 1 pcs with a step of 0.1mm

rod length 150mm with thread 3x0.5 or 4x0.7