Skin and butcher the antelope asap. freezing too soon keeps the meat from aging and getting tender. depends on the weather. doesn't hurt meat to be in icy water in an ice chest if you drain it daily and replenish the ice. cleans it and allows it to age a bit.
Any thoughts re: grizzly hunting with 458 Win Mag vs.458 Lott? I have a Win M70 in Super Express Grade in 458 Win Mag. Is it worthwhile to have it reamed to 458 Lott?