First of all, welcome to the forums.

Second, you bumped a 3 year old thread to ask your question. You would have been better off starting a new thread with your question on 296.

Finally, to answer your question, 296 is a great 44 Mag powder for high velocity loads, especially in a rifle. The non-vented chamber of a rifle along with the long barrel gives complete combustion with 296 or H110 (same powder, different name). I've had real good results with it and 240 grain bullets out of my Browning B92, which has a 20 inch barrel.