In the Man Magnum magazine January 2012 edition Paul Phelan describes how he took a 480gr Hornady DGS bullet and lathe turned an extra cannelure into it, 2mm lower than the one it came out with. This enabled him to seat the bullet 2mm out and still be able to crimp it. This in turn gave him some extra case capacity for extra powder and thus higher velocities without excessive pressure and without compressed loads. He obtained 2200fps. Now, if one already has a 458 Win Mag, this obviates the need for a Lott or Express. Except if you really want one.