Check out CorBon ammo - they make three .45 Colt "Magnum" loadings (265gr JHP., 300 gr. hard cast and 305 hard) - all of which equal or excede .44 Mag. loadings with respect to muzzle velocities and energies- all are intended for hunting and are to be used in certain firearms only - i.e. those that are also chambered in .44 Mag. I got a box of the 265 gr. loadings to use in my Taurus Model 450 Titanium snub nose - and let me tell you, they are a double handful and then some with such a light weight piece and the muzzle flash was, well, startling to say the least. Good close-in bear or predator round - but don't count on follow-up nor being able to hear for a couple hours, if not wearing hearing protection.