im having a 7rem mag bored and chambered for a .416 taylor.... i'll need a small base die for resizing.... can i take a 7rem small base die and cut the top off of it????..... i have a full length set to do the resizing for the shoulder and neck.... none of my browning auto's like reloads......i'm using nickle .458 win mag brass.....ideas????

get the belted mag "above the belt" resizer .. or have someone make you one from 7/8 all thread .. .510, right?