Thanks for the info. I've been using Barnes bullets up till now. This is my spring bear gun and with the Barnes bullets it kills like Thor's hammer! But not being able to leave well enough alone, I just can't resist tinkering.Most of the time I've had better luck w/ IMR4831 w/ the 150's-160+ grain bullets, and RL22. IMR7828 for the 175 NPT which I know a lot of people may think it's outdated, same might say for the 150 BT, but they still just plain work.
RL26 is basically RL25 which is/was a very slow powder, I'd assume you'd want a fast twist with a heavy for caliber bullet.
Oh, I have used H4350 to fire form loads, it's better suited to the 140-150 grain bullets IMO, but I have tried it w/the 162 ELD-X. So-so for me, but my rifle is only a 1:10". I didn't see a real need to burn up bullets, or the powder down my barrel anymore, been there done that years ago with this gun, and why I went to test all the newer stuff was beyond me!
I am a big fan of the 7mm roundsI have a load I developed years ago when the TSX's first came out I still use to this day w/RL22 and the 160 TSX FB in my 280 AI, works great.... nothing has ever walked away.