The 458 winnie is a sweetie if you reload I have a client getting close to 2200 out of a 24 inch bbl with 500s plus if you reload its so much cheaper to feed as far as price of brass on another note have you thought about haveing your 375 h&h rebarreled to 416 remington magnum very easy and cheap to do you'll have lott preformance with far cheaper brass and theres no flies on it