A set of 5 different shims that can be fitted to the bolt of the KK500 to adjust the headspace
This is especially useful when changing brands of ammunition with difference rim thicknesses
The shims are sized and marked as such
1.52mm – 1 nick on rim
1.53mm – 2 nicks on rim
1.54mm – 3 nicks on rim
1.55mm – 4 nicks on rim
1.56mm – 5 nicks on rim
