Ah... maybe it's just me, but I don't think I'd put a fixed 10x on a lever action .45-70. Other than maybe for load development at the range.
It's kind of a waste of the scope IMHO, and limits the usefulness of the gun.
If it were me, I'd look at something like a Weaver V3 (1" 1-3x20mm) for a scope to give you quick-n-dirty close-in capability, along w/ a touch of magnification for a little longer shots (say, 200-300yds w/ that kind of
As always, this advice is worth exactly what ya paid for it ;)