i see leupold makes a specific shotgun- muzzleoader scope for 199$ i believe its 2x7x33. the thing you have to understand is most rifle scopes are paralaxed for 150 yards where a shotgun- muzzleoader is usually 75 yards so there is a difference. on the cheap look into the bushnell banner. i like the fixed 4 power. thats around 69$