Springfield Krag rifle builder.

[butlersrangers]

God's praises to those, who own guns and use proper fitting screwdrivers!

A 'Field Gauge' with a rim thickness of .073 or .074 inches is probably the most useful with U.S. Krags.
A 'Go Gauge' is relatively useless, unless fitting a newly manufactured barrel to an action.

Many Krag's may close on a 'No-Go Gauge', but, be totally safe, gentle on Brass, and have many years of shooting left in them.

"Grandpa's Gun Parts" has original NOS model 1898 Krag bolts available for around $60.

Neck-Sizing .30-40 Brass, by backing-off the re-sizing Die one turn, extends case life and avoids needlessly 'working' the case-shoulder.