Rereading your original post gave me another idea. The .44 Magnum chamber can take a wide range of charges, from .44 Russian to Special to Magnum... if you reload. If you want a 'bigger' bore, with some decent possibilities, consider a 625 in .45 ACP. You can buy the ammo anywhere, and commercial 230gr ball ammo isn't much more dear than the reloading cost. Of course, you can load light to heavy there as well. The revolver is rated for the 22+ kpsi .45 ACP cartridge, quite a bit over the 14kpsi SAAMI spec for the .45 Colt. I have a 625JM, a 4" bargain-trove of extra goodies. I reload, so mine gets .45 Colt-ish 255gr LSWC at 880+ fps, over .45 Colt SAAMI speeds, from the 4" barrel in the .45 Auto Rim cases. Some folks get more oomph than that. The larger diameter bullet at a lower pressure generally means a bit less recoil. The added plus of moonclipped ACP rounds for fast reloads really is fun, too. Another 'choice'...
Stainz