Justin - How much have you shot that Savage LRH with that scope? How do you like the scope? My guess is that you will like a 28" barrel in the 6.5-.284 Norma, but some guys are using a 30" barrel. I expect a 30-incher to rob some velocity, but world-class accuracy is somewhere out there in the longer barrels. The Norma is getting a reputation as a barrel burner at about 1,000 to 1,500 rounds, and the best accuracy often comes after the first shortening. Each gun is different, but lots of reports of 27" to 29" being the best.
Cold Trigger Finger - I doubt I would use a boat-tailed FMJ slug on fox at close range. I guess fur is your priority? Something that stops inside him and does not blow an exit wound out the back might work better. I like a .22-250 on fox and coyote at mid-ranges (200 - 600 yds), with a semi-metal jacketed slug, a .25-'06 out at longer ranges (500 - 800), and that 6.5-.284 Norma for longer work (500 - 1,200) with a Barnes Triple-Shok on coyote and fox. Of course, I can't make an appointment with the critters and have the gun of choice and the perfect load every time either.... :-( The medium-light slugs and lighter loads in .25-'06 with a fairly quick expanding slug might do exactly the job on a fox.
Good luck, and I'd like to hear back on that.