You only have one set of eyes and fingers. Shotguns are cheap by comparison. Get the gun checked by someone competent to evaluate its safety, and if there is any doubt about it, make it a wallhanger and get a gun that's proofed to be safe with modern loads to shoot.
Mindset - Skillset - Toolset. In that order!
Attitude and skill will get you through times of no gear, better than gear will get you through times of no attitude and no skill.