You can probably have screw in choke tubes installed (along with a new bead), the hole you drilled for the sight may not be an issue at all. More info sent via PM.
Hardships are quickly forgotten. Intense heat, bitter cold, rain and snow, fatigue, and luckless hunting fade quickly into memories of great fellowship, thoughts of beautiful country, pleasant camps, and happy campfires.
Fred Bear 1902-1988