Maybe a Sierra, .458 350 grain HPBT Matchking for your Creedmoor rifle. Supposedly good for 1-12" twist, with a .805 bc.
Sir Larry, In what multiverse ? Maybe a .458-.375 sabot ?
Unfortunately it would have to be a sabot. I misread their labeling. Disappointed abounds. Dang, I thought it was a .458". Scratch that idea. I guess the single load CEB types will be the option. Unless there is are other custom options.