Re: 2 rifles and one scope?
I have no issue at all switching scopes between my rifles using picatinny rails.
Bolt it on.
Bore sight if you like. But, mine always seem to be on paper at 100yds with the first shot.
Adjust the turrets and the second shot is dead on.
If you're using custom BDC turrets for each rifle, then you have an extra step or two.
It's not something you'll want to do in the field, but it is workable with quality optics.
And, if you use 20 MOA slope, then you'll want the same on all rifles.