Fischer, I think the bullet is ok, you're just pushing it too fast. That same bullet at 18-1900 fps. would be ok for deer.

Nothing wrong with a 300 gr. bullet, I use a 300 gr. nosler partition for practically all my hunting, out of my 45-70, but even nosler says don't go above 2300 fps, or the bullet won't work like it's supposed to. If you need a tougher bullet, for that speed, you may want to look at the Barnes offerings. JMHO.

maddog