About a year ago I thought about that exact same thing, but Hornady told me that bullet is designed for shooting out of the .458 win mag and would not reliably expand at velocities an NEF/H&R would be capable of, so I sold the box of bullets for what I had in em which I got on closeout at a local shop going out of business. If you want to shoot heavy loads, I would suggest either the 460gr Cast Performance WLNGC or the 525gr Beartooth Pile Driver, both are excellent performing bullets designed for the 45-70.
I've got a Bushnell Elite 3200 10x40 Mildot on one of my BCs, got it used for $125, IIRC, new one sells for $174..
http://theopticzone.com/detail.aspx?ID=3252If you're a stock crawler, I wouldn't recommend any scope with less than 4" of eye relief, 5" would be better, though. Doubt you'll find anything new for $100, too.