Why I need 2 threaded holes on muzzleloader is that when I picked up a TC Hawkins 45 cal. barrel with 1-66 twist it came with a 4 power brass scope 33 inch long mounted . Problem is someone put the front base to far forward and I can't move scope back enough for better eye relief.Just had a idea might work. Since the holes are already there I think I'll make a base that I can attach the original base to and screw the old to new.Just need to get scope a few inches rearwards.