Varget is the easy button. H4895 also works well.
A2460 does wonders with the 130TTSX. Running mine at 3135 fps out of a 18" bolt gun. Barrel gained 50 FPS after 200 rounds. Was at 3085 and recently I noticed high impact on shots. Hooked up magnettospeed and sure enough up in speed now to 3135 with SD of 9.I also shoot the Barnes 130 TTSX. While I couldn't get my rifle to shoot great with Varget, it does shoot sub .5moa @ 400yds with a healthy dose of 8208XBR. That little bullet just SHOOTS.
AR Comp. By far the most accurate powder out of the 8 I tried in my AR 10 with 165-168 grain bullets. It is also my preferred in both of my 6.5 Grendels. If I could only have one powder for these two calibers, AR Comp would be it.I have loaded some 168TMK with RL15 and some with Varget, for M70, but have yet to test them
Any suggestions for AR-10 20inch and FAL 20inch? (First is DI, second is piston)