I would try several powders such as Varget, RL-15, 4064, 8208 etc. and see what works best. I just purchased a Savage 308 model 10 FCP to go against my friend's new Savage model 10 also in 308. I too was looking for good powder to use as this is my first 308 and tried Varget, 8208, 4320, RL-15.
We both tried the 4 powders with various results. XBR (8208) worked very well with my friends rifle. He out shot me at 200 yards with 40 grain load of XBR, Lapua Brass, CCI 200, and 168 SMK, & 167 Lapua bullets. He tried with Varget, IMR 4320, & RL-15 too of various weights. Second best for him was IMR 4320 but nothing as close to his 40 grain load of XBR. He managed to put 4 out of 5 in the x ring at 200, those 4 touching with an XBR load. I was very impressed (have to buy breakfast next weekend) and so next day tried some loads myself.
I used Nosler brass, CCI 200, 168 SMK & 168 AMAX, w various weights of Varget, XBR, & RL-15. At 100 yds. I couldn't get anything to work with Varget under .9 and gave up on Varget for my 308. I tried the 4320 but seemed to get one always out from the others by almost an inch. My rifle seems to like the AMAX better for some reason too.
I was really bummed out as so many friends said it was their "best" powder was Varget and swore by it. But as I noticed RL-15 consistently threw 3 touching around .5 inches, with some nice .2 to .3 groups for my best of the day from 42 grains up to 44 grains of RL-15 with the AMAX, I decided to work with it mostly and compare it to XBR.
The RL-15 was definitely better in my rifle putting 5 shot groups into one ragged hole when I did my part and I still can get some very nice groups into the .2s.
But the point here is both Savage rifles and both same model seem to like totally different powders. I would buy several 1lb types if you are serious and keep everything else the same. You should be able to find which powder it will liked best as soon as you try them near a full load watching for pressure signs. One powder should do well and maybe you'll be lucky to find another powder that works well too.
Try several types and once you find one that seems more consistent than the others, try moving that charge up/down to see if you get better groups. Also, I noticed my groups went down a lot based on seating depth. My rifle definitely likes the bullets into the lands and I'm going to ask about that in another post.
Good luck,
d-rat