Ive been testing some 44 mag loads in a 29-10 w/ a 6-1/2'' barrel using some 300 grain nosler JSP and Win 296 (with federal mag primers) and am wondering if im getting the full effect with this load.

I am following some data posted on noslers site with a min of 20.0 grains, and a max of 21.0. I am loading about 20.1 of 296. With this load i am getting powder (unburned? ill include a pic) in my cases, and some in the barrel. I am also not experiencing much of a muzzle flash like alot say happens with slow powders.

It will be a bit till i can get out on the range to experiment some more, so i figured id ask you all in the meantime.

Any suggestions?