Based on the Nosler data, I'd use IMR4320 as I have it on hand and it proposes to be accurate at the top end of the data*
Merry Christmas
Jeff
NRA Life
From the Nosler Website:
dia Wgt profile B.C. S.D. Bullet Length
.308"150Gr. Spitzer 0.435 0.226 OAL 1.2803015030
.308"155Gr. Hollow Point 0.450 0.233 OAL 1.1755315530
.308"150Gr. Spitzer 0.435 0.226 OAL 1.2805115030
.308"150Gr. Spitzer 0.435 0.226 OAL 1.2305671930
.308"150Gr. Spitze r0.387 0.226 OAL 1.10016329
Case Type:Cart. Max. AOL

rimer Type:Barrel Length/Make:Barrel Twist:
Nosler 2.810" Fed 210M 24" Lilja1-10"
Powder Type

owder Charge Muzzle Velocity:
Grains F.P.S. / M.P.S. Load Density
IMR4831 Max. 52.0 2750/ 838 112%
50.0 2660/ 810 107%
48.0* 2570/ 783 103%
IMR4895 Max. 44.5 2802/ 854 99%
42.5 2673/ 814 94%
40.5* 2544/ 775 90%
IMR4320 Max. 47.0* 2842/ 866 102%
45.0 2727/ 831 98%
43.0 2612 / 796 93%
Viht N135 Max. 45.0* 2863 / 872 106%
43.0 2740/ 835 101%
41.1 2617/ 797 96%
Nosler, Inc.
107 SW Columbia St. Bend, OR
97702 U.S.A.
800-285-3701