AS far as loading the 7-08, some of us have been having success withIMR 4350 at mid to max loadings. Some perfer Varget. I tried it with no luck. Same with H380. Each gun is an idividual, and will tell you what it likes best.
I also tried the 139 gr. Hornadys. They shot reasonably well, but when I tried the 140 Accubonds, the gun really perked up. This ought to give you a place to start if you want.....