I like IMR 4227 and I don't know why. It doesn't meter quite as well as many other suitable powders. It doesn't yield quite the velocities that other suitable powders can produce in the straight-walled magnum revolvers. It isn't clean burning, leaving a lot of "crumbs" of yellow-green powder residue in the bore, on the cylinder face, and inside the frame. Despite all this it has proved to be quite accurate for me in the .44 Magnum, .357 Magnum, and even the .38 Special. It appears to be well-mannered in near-max to max load applications. It works well with both cast and jacketed bullets.

It is first rate when used in the .22 Hornet and gives reasonable performance in the .30 Carbine (H 110 is best in my view).