mine also has a 20" barrel had great luck with h4350, rl17 and rl22
ran these for you on quickload obviously start low and work up
Cartridge : .30-06 Spring. (SAAMI)
Bullet : .308, 168, Nosler BalTip 30168
Useable Case Capaci: 59.819 grain H2O = 3.884 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 20.0 inch = 508.0 mm
Powder : Hodgdon H380
Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !
Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms
-20.0 74 41.60 2101 1647 28214 8424 87.5 1.445
-18.0 76 42.64 2153 1729 30001 8706 88.8 1.408
-16.0 78 43.68 2205 1814 31898 8984 90.0 1.372
-14.0 79 44.72 2258 1901 33912 9255 91.1 1.337
-12.0 81 45.76 2310 1990 36050 9520 92.2 1.303
-10.0 83 46.80 2362 2082 38320 9776 93.2 1.266
-08.0 85 47.84 2415 2175 40730 10024 94.2 1.230
-06.0 87 48.88 2467 2270 43289 10263 95.1 1.194
-04.0 89 49.92 2519 2368 46007 10490 95.9 1.160
-02.0 90 50.96 2572 2467 48896 10707 96.7 1.127
+00.0 92 52.00 2624 2568 51968 10912 97.3 1.095 ! Near Maximum !
+02.0 94 53.04 2676 2671 55236 11104 97.9 1.064 ! Near Maximum !
+04.0 96 54.08 2728 2776 58715 11281 98.5 1.034 ! Near Maximum !
+06.0 98 55.12 2780 2883 62421 11445 98.9 1.006 !DANGEROUS LOAD-DO NOT USE!
+08.0 100 56.16 2832 2991 66373 11592 99.3 0.978 !DANGEROUS LOAD-DO NOT USE!
+10.0 102 57.20 2883 3101 70591 11724 99.6 0.951 !DANGEROUS LOAD-DO NOT USE!
Cartridge : .30-06 Spring. (SAAMI)
Bullet : .308, 168, Nosler BalTip 30168
Useable Case Capaci: 59.819 grain H2O = 3.884 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 20.0 inch = 508.0 mm
Powder : Ramshot Big Game
Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !
Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms
-20.0 71 41.60 2086 1623 26473 8363 88.6 1.456
-18.0 73 42.64 2137 1703 28114 8644 89.9 1.420
-16.0 74 43.68 2187 1784 29855 8918 91.1 1.384
-14.0 76 44.72 2238 1868 31702 9186 92.2 1.350
-12.0 78 45.76 2289 1954 33662 9446 93.3 1.316
-10.0 80 46.80 2340 2042 35743 9697 94.3 1.283
-08.0 81 47.84 2390 2131 37952 9938 95.2 1.248
-06.0 83 48.88 2441 2223 40296 10168 96.0 1.214
-04.0 85 49.92 2492 2316 42792 10387 96.8 1.181
-02.0 87 50.96 2542 2411 45432 10593 97.5 1.148
+00.0 89 52.00 2593 2507 48262 10785 98.1 1.117
+02.0 90 53.04 2643 2605 51243 10964 98.6 1.086 ! Near Maximum !
+04.0 92 54.08 2693 2705 54390 11128 99.1 1.057 ! Near Maximum !
+06.0 94 55.12 2742 2805 57727 11276 99.4 1.029 ! Near Maximum !
+08.0 96 56.16 2792 2907 61272 11407 99.7 1.002 !DANGEROUS LOAD-DO NOT USE!
+10.0 97 57.20 2841 3011 65041 11522 99.9 0.975 !DANGEROUS LOAD-DO NOT USE!