My wife asked me what I wanted for Christmas. I'm wanting a scope for my inline muzzleloader cause my eyes aren't as good as they used to be. I have never bought a scope or know much about them. I have a 50 Cal. CVA muzzleloader. I shoot 295 grain powerbelts with 100 grains of Pyrodex pellets. What should I look for in a scope for shots of 100 yards in. I don't feel comfortable shooting over that. Any help is appreciated.

Thanks
Chad