Re: 375 h&h + 250 ttsx
Have been loading shooting the 375 H&H for years. Currently shooting the 270 Grn Barnes in one with IMR 4064 , 70.0 Grns. Powder seems very temp stable. My other "longer range load" used is H4831sc with the 260 Grn Nosler Accubond, Norma brass. I believe 78.2 grns (double check) out of 26 inch tube at 2744 fps no pressure. Groups in the .75 inch range considering the bullet diameter is .375 I'll take it! The Accubond has a pretty good BC and I have been shooting it to 800 yards very consistently. Overall I have had the best luck with 4064 and go back to that most of the time max loads are not compressed in the 70 grn range with 250 Grn Bullets and seems less pressure. Of course work your way up as I know I am close to max by most books.