A lot would depend on the type of break, and the caliber of the gun. Krider made some large caliber plains type rifles, some with back action locks. If this is what you are talking about, shooting it might be problematic. I examined a Krider years ago with similar damage. It was .58 cal. With a back action lock, and a short barrel of about 28" that was 1-1/4" across the flats. This guns short forearm, and heavy barrel, combined with the inherent issues common with a back action lock, forced me to pass it up. I was focused on shootable antiques back then, and didn't see this gun as ever being safely shootable.
Hungry Horse