Currently shooting a .338 Super, Winchester S/S Pre 64 Action, Douglas Fluted Barrel, Zeiss Diavari Z 3-12 X 56 MC Scope. I have to shoot .340 Weatherby ammo and fire form the cases and have them reloaded, or shoot .340 Weatherby Ammo and I don't think it is as accurate. Going to downsize to a >300 Weatherby or possibly a .7mm mag. Should I use the same scope on my new rifle, or is there a better choice? (Haven't kept up w/ the new products out there now)