Win 296 + 310gr. cast

H110 is the same powder as 296, I hope that little tidbit might find some info.

I used to use a copious quantity of H110 under a 300 grain Meister cast bulet in a S&W Mountain Gun I had but I can't find the notes. As I recall it was a compressed charge, and I know for sure I wrecked the gun with it. Shot it loose in a hurry, less than 3500 rounds and it rattled like a GI 1911. The front sight pins used to break regularly too, it would fly off into wherever things go that you never find again....

300's in a 44 have always shot well for me too.

Not H110/296, but according to author, VVO N-110 has the edge. Here are the links: http://www.beartoothbullets.com/tech_notes/archive_tech_notes.htm/45 , http://www.vihtavuori-lapua.com/vihtavouri.asp . Onty.

With Dry Creeks 310gr Keith 21.5gr of H110 (twin to 296) at 1.749" OAL does 1,275 fps from a 6" S&W. A 300gr LTC at a shorter 1.639" OAL and the same powder charge did right about 1,400 fps from a 6.5" M44 Taurus, that one seems a bit on the warm side and I didn't fire very many of them.

I'd start at 19.0gr and see how fast they shoot in your gun with that particular bullet and work up if you want more velocity and/or accuracy.