It chambers and ejects a standard factory .30-40 round. The barrel gauges .30 as with other .30 barrels. Order some Cerrosafe from Brownells. Following direction make a cast of the bore/muzzle as well as a chamber cast. That will confirm you preliminary findings. Much better than an experiment that ends in boom rather than bang. The Krag is fine with normal SAAMI ammo. The receiver does not have a high margin of strength. Possibly the barrel is from a 03-A3 which typically had a odd sort of profile with a section milled in about the middle of the barrel that might be seen as a step, certainly not as stepped as mauser barrels. These 03-A3 barrels could be and not uncommonly were, set back and rechambered and then fitted to Krag receivers. That was a common fix for .30-40 barrels that were in poor condition. JMHO. Sincerely. bruce.
Last edited by bruce; 05-24-2022 at 12:49.
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