Your 12" .44mag barrel doesn't provide enough whoomp? Says who, or what? A 325g LBT LFN hardcast @1600fps will cleanly harvest and thouroughly penetrate any game animal on this continent with ease. This length barrel and some H110 will do this with no muss, no fuss, and no strain, not counting your wrist of course. If you don't reload, federal has a premium "Cast Core Performance" load. It is "only" a 300g at 1375fps or so, but is more than adequate for Elk and the like inside a 125yds or so. It is the larger meplat, .340", WFN bullet, as aposed to the LFN's .300" meplat diameter, so it's shocking power is not at all sacrificed.
My last years wild boar hunt, using lowly 280g WFN's @ 1275 fps, with friends was a success. All game died within sight of the shooter and there were no recovered bullets.
.44mag reloading and buying is the cheapest compared to any .480, .454, .460, and performance is not sacrificed at all, especially in a closed breech gun.
If you want a flat shooting gun the .44mag using 300g LFN's, BC is about .245, @ 1700 or so will allow you to reach out and touch something with more than enough slap to penetrate an moose
If you don't reload I would sell the .460 barrel and get a RCBS kit.
My hunting loads are about .25 cents a piece. Federal Premiums are about a dollar a shot.
Bang!