Loads that work great in my R700 tactical 20" barrel
168 A-Max, 45.8 varget, winchester case and primer OAL 2.825 = 2674fps
175 SMK, 44.5 varget, winchester case and primer OAL 2.825 = 2550fps
At 100y the 175 smk load almost always holds 1/2 moa, if it doesnt I know its something I did... and it works well for two other 20" tactical owners that I know of.
Held .5 mil wind. 5 shots 8" spread counting the one I knew I pulled low, 4 were less than 5". Not bad for a factory Remington Tactical and 10x nikon... 700 yards.
Just worked up the A-max load and it is looking like another contender.
Forgot my hunting load: 168 berger vld, 45.8 varget, Lapua brass, winchester primer, OAL 2.815 = 2640fps
Took a mule deer this past season at 175 yards and it worked perfect. It doesn't shoot quite as tight as the 175 but still good at ~1/2-3/4 moa at 100y, and I have taken it out as far as 1000 on steel.