Sounds like you have a good start on getting the results you want.

There is a lot of variance between barrels. I have 3 Savage .308 WIN barreled rifles. I checked all three with a Hornady Lock-N-Load-OAL Gauge. It's a really handy tool. The average measurement for 155 AMAX bullets varies from 2.785 (Savage Palma) to 2.842 (Shilen Barrel) to 2.830 (Savage 12 BVSS) inches. All three guns shoot very well (under 1/2 MOA), but use different bullets (and powder) to get there. The Palma gun works with 155 AMAX over N150. The Shilen-barreled gun likes Berger 155's over Varget and the BVSS likes Hornady Zombie Max -I'm not kidding.

The point is that you can get as OCD as you like tinkering with combinations. And what works with your gun may not work with mine. I did a lot of experimentation with my Palma gun before I found what it likes best. Or, you can find something that works reasonably well - such as Zombie Maxes for the BVSS -and go on to the next thing.

So long as you keep the pressures safe, you'll be ok.

Good luck.