I'm glad to see others confirming what I've seen elsewhere. That 4227 is a decent 357 and 44 magnum powder, but not so good for 38 special. I picked some up cheap ($10 a pound) to use for full boat magnum loads, and will use it for magnums only.
BTW, 14gr isn't too far from the bottom end of the 357 magnum loading range (15.3gr for a 158gr LSWC, IIRC).