I currently am using RCBS full length sizing die, have been reading about using a collet die in place of the full length resizing die. Is it worth me switching? They are expensive, here is what i've been looking at. http://www.natchezss.com/product.cfm?contentID=productDetail&prodID=LEE90712 This is for my 6.5x55, will be for target shooting and deer hunting. How much can i expect my brass life to improve?