Even low risk activities should be avoided when you are dealing with rare or valuable firearms like an original 1894 Krag.

I had a well known gunsmith/armorer tell me a technique he uses to check bolts to find hidden or small cracks. It involves wiping the bolt with some chemical which allows a die to penetrate small hairline cracks that can then be easily seen. Obviously it is a concern for certain situations but is very rarely seen today.

Just be careful with what ammunition you shoot and you should be fine.