Of all the rounds mentioned, the 45/70 has the most jam when reloaded, as it can be loaded to the same pressure levels as the others, and is the biggest and will digest the heaviest of bullets. It is easily a 200 yd. moose gun esp. with good irons(peep) or esp. scoped, however many times and places folks are better off with irons, so maybe some kind of QD. mount setup may be best if you want to stretch the range. Any of the cast flat points from over 400 grs. to 600grs. will be best on the big stuff....enjoy!!