I use H4227 almost exclusively , the powder Steve and Bob used to develop the cartridge originally. I use 22.0/H4227/100 Gr Plinker to fire form brass, use remington or Federal less internal taper and no neck reaming. I then use 26.0/H4227/Speer 110 RN --the original hunting load for this round, warning warm load work up to it. The best load I have found is 24.0/H4227/125BT does 2325 out of my 30 year old barrel and shoots into 1" or so when I do my part. You can use the Speer 110 grain HP varmiter with the 26 grain load and it also works well. You have a very nice caliber and in my opinion one of the best in the 10" barrel. I have a 14" 30/30 and like it but I also like my 10" 30H! A lot of meat came home to the freezer because of it.The 125 BT load shot diagonally through a 250# hogs chest and dropped him on the spot, not to mention deer ,turkey, javelina,coyotes and antelope that have fell to the 30H. Great round , there are more powerful rounds but few better balanced for most game up to mule deer.