Struggled myself with the 7-08 with near a full box till I got it,,tips;
* I needed ALOT of jump! .120 as a matter of fact (deep neck H&R), the story is to seat to the middle of the top ring on the bullet, with just a touch of crimp,,and I mean just a touch,, re set the die after seating the bullet too crimp. I went back after I got that advise (it worked) and tried to seat closer by .020,,.100 off the lands and the group opened.
* those things copper foul alot,,even if Barnes says they don't as bad as the originals, 15 rounds and the bore needs cleaning for copper fouling.
I ended getting near MOA at 200,, 2- 2 1/2"s if I do my part