Below are the dimensions I have copied from actual US GI gages. Some of these dimension may have changed slightly over time as changes may have been made to cartridges, primers, and bolts.
- M1 & M14............ Min. .044...............Max. .060
- M16 ......................Min. .028...............Max. .036
- M60 ......................Min. .035...............Max. .043
- .30 BMG...............Min. .060...............Max. .068
- .50 BMG M2........ Min. .073 ..............Max. .080
- M203 G/L............ Min. .032 ..............Max. .047