Grouse, get you some Crush ribs (not the shorties) for those .458's. They work beautifully for my .458 lehighs out of my TC. I got a ton of them to load up for the SOCOM and found they shoot pretty dang sporty from my front stuffer as well. Aint legal here for deer (not an expanding design) which is incredibly stupid as I had them tested on some hogs with my SOCOM while I was down and the reports were amazing damage to the internals with little damage on entrance and exit to the meat. But anywho, give the long petal CR's a swing with them and you will probably find a winner.