As was just said, it is a very easy conversion. I just had a .458 Win mag Model 70 done and I think it cost me something in the $80 dollar range. Prices in your area may vary. Nowadays one can get 2150 fps. from a .458 WM with a 500 gr. bullet with careful reloading. However, you can get 2250 fps. from the Lott without breaking a sweat.

Geronimo