IM curious, why the idea of the 458 LOTT was abandoned?
personlly I have owned and used all three calibers and if you handload the 458 LOTTS certainly a good choice, for plains game I think the 375 gets the nod, but the 416 rem is a good compromise.
you might want too look at the 378 wby, has a flatter trajectory than any of the calibers you mentioned and with the better premium bullets its an excellent stopper, hard to beat a 300 grain bullet pushed to about 2900fps for stopping power

Last edited by 340mag; 02/25/08.