.300 Dakota
Well-Known Member
Because the question is which is "the most versatile for handloaders..." with all those animals and situations in mind, you HAVE to pick the 338 Win Mag. Brass is easier to come by than any other 338 caliber, cheaper with larger bullet selection than anything bigger, and decidedly more potent when loaded properly for the largest bears (and capable of thumping coyotes when loaded properly the other way). Easily the MOST versatile for every critter on NA continent.