If you send Lee Shaver a picture of your Mother in Law's behind ,....bent over weeding ( or whatever
) he can set up a set of inserts to perfectly outline the shape, in three incremental sizes.
Not that I'm suggesting (as much as most of us at one time or another have THOUGHT about it) that one would shoot his MIL in her more than ample derrier'.
I think he offers a complete set of his apertures in that Pedersoli size, lazer cut, or photo etched.
Get offa' the 50 and 100 yard range, and stretch that rifle's range a bit, once you're again looking at a decent sight picture.
GTC