Load Specifications
Bullet Manufacturer:Speer
Bullet Weight:150 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Case Length (l3):2.003"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:74 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:15.0
Load data in caliber .300 Rem. SA Ultra Mag. with .308 | 150gr | Speer Boat-Tail bullet and 105 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR and Alliant Reloder-17.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 56,144 psi | 86% | 2913 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 58,378 psi | 90% | 2995 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 58,349 psi | 90% | 2986 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,739 psi | 87% | 3005 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 57,943 psi | 89% | 2982 fps | 96.5% |
| Accurate 4064 | <<locked>> | 94% | 58,001 psi | 89% | 3031 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,954 psi | 83% | 3051 fps | 99% |
| Accurate LT-30 | <<locked>> | 82% | 58,160 psi | 89% | 2900 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 58,581 psi | 90% | 2930 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 55,347 psi | 85% | 3015 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 94% | 56,115 psi | 86% | 3009 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,885 psi | 89% | 3018 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 58,465 psi | 90% | 2992 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,927 psi | 86% | 3074 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,882 psi | 84% | 3133 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,014 psi | 86% | 3031 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,738 psi | 86% | 2920 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,695 psi | 87% | 3058 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,199 psi | 80% | 3058 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,971 psi | 88% | 3159 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,072 psi | 57% | 2762 fps | 97.1% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 57,624 psi | 89% | 2897 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,998 psi | 85% | 3025 fps | 99.2% |
| Bofors RP3 | <<locked>> | 94% | 56,913 psi | 88% | 3051 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 57,000 psi | 88% | 3012 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,260 psi | 87% | 2953 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 57,203 psi | 88% | 3048 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,550 psi | 85% | 3097 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 84% | 58,682 psi | 90% | 3015 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,970 psi | 86% | 2986 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 57,957 psi | 89% | 3061 fps | 99.1% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 57,261 psi | 88% | 3107 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 98% | 57,943 psi | 89% | 3068 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 88% | 55,869 psi | 86% | 3028 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,428 psi | 75% | 2930 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 58,740 psi | 90% | 3114 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 58,755 psi | 90% | 3150 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,201 psi | 54% | 1841 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 57,217 psi | 88% | 3028 fps | 99.9% |
| IMR 3031 | <<locked>> | 88% | 55,593 psi | 86% | 3012 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,753 psi | 86% | 2995 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,941 psi | 86% | 2969 fps | 97% |
| IMR 4198 | <<locked>> | 82% | 55,593 psi | 86% | 2877 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,606 psi | 82% | 2979 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,376 psi | 85% | 2989 fps | 96.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,111 psi | 79% | 2986 fps | 98.7% |
| IMR 4895 | <<locked>> | 92% | 58,146 psi | 89% | 3091 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 57,885 psi | 89% | 3018 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 58,262 psi | 90% | 3005 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 58,697 psi | 90% | 3045 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 58,436 psi | 90% | 2992 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 55,361 psi | 85% | 2989 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 57,972 psi | 89% | 3035 fps | 98.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,405 psi | 85% | 3015 fps | 97.2% |
| Norma 201 | <<locked>> | 90% | 57,493 psi | 88% | 3012 fps | 100% |
| Norma 202 | <<locked>> | 90% | 57,928 psi | 89% | 3012 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,854 psi | 86% | 3041 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 53,040 psi | 82% | 3038 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 92% | 56,739 psi | 87% | 3071 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,098 psi | 80% | 3031 fps | 97.3% |
| Ramshot TAC | <<locked>> | 88% | 58,494 psi | 90% | 3038 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 88% | 57,870 psi | 89% | 3058 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,245 psi | 85% | 2963 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,578 psi | 55% | 1883 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 57,464 psi | 88% | 3002 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 58,320 psi | 90% | 3041 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 57,203 psi | 88% | 3127 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 56,869 psi | 87% | 3163 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,751 psi | 83% | 3074 fps | 98.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,896 psi | 83% | 3100 fps | 98.6% |
| Rottweil R 901 | <<locked>> | 88% | 58,465 psi | 90% | 2995 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 57,856 psi | 89% | 3009 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 56,478 psi | 87% | 3038 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 57,000 psi | 88% | 3012 fps | 96.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 57,972 psi | 89% | 3035 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 90% | 58,697 psi | 90% | 3045 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,361 psi | 85% | 2989 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,405 psi | 85% | 3015 fps | 97.2% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 57,188 psi | 88% | 2972 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 58,566 psi | 90% | 3104 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,637 psi | 87% | 2946 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,869 psi | 87% | 3012 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 57,174 psi | 88% | 3035 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,622 psi | 86% | 2900 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,622 psi | 86% | 2894 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,245 psi | 85% | 2933 fps | 96.9% |
| Somchem S321 | <<locked>> | 84% | 55,651 psi | 86% | 2999 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 58,349 psi | 90% | 2946 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,130 psi | 86% | 3002 fps | 99.7% |
| Somchem S355 | <<locked>> | 96% | 56,666 psi | 87% | 3035 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,616 psi | 73% | 2989 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 86% | 58,755 psi | 90% | 2910 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,753 psi | 86% | 2887 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 57,348 psi | 88% | 2972 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 58,610 psi | 90% | 2989 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 58,639 psi | 90% | 3018 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,796 psi | 86% | 3038 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 88% | 58,595 psi | 90% | 3022 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,739 psi | 87% | 2986 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,839 psi | 84% | 3041 fps | 98.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,190 psi | 62% | 2848 fps | 97.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,739 psi | 87% | 3022 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 58,407 psi | 90% | 3068 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 57,551 psi | 89% | 3114 fps | 97.5% |
| Winchester StaBALL Match | <<locked>> | 90% | 57,276 psi | 88% | 3048 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 46,514 psi | 72% | 2769 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,981 psi | 78% | 2887 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,363 psi | 61% | 2687 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,035 psi | 71% | 2838 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 50,734 psi | 78% | 2864 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 37,217 psi | 57% | 2674 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 38,218 psi | 59% | 2756 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 54,810 psi | 84% | 2854 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 55,216 psi | 85% | 2884 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 43,018 psi | 66% | 2792 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 36,564 psi | 56% | 2631 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,034 psi | 69% | 2805 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 44,889 psi | 69% | 2799 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,591 psi | 81% | 3018 fps | 99.8% |
| Alliant Power Pro 2000-MR | 54.4 gr | 80% | 38,899 psi | 60% | 2805 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,911 psi | 55% | 2651 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,475 psi | 81% | 2874 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,754 psi | 60% | 2720 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 90% | 38,334 psi | 59% | 2766 fps | 95.7% |
| Alliant Reloder-17 | 54.9 gr | 82% | 33,199 psi | 51% | 2661 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 32,793 psi | 50% | 2648 fps | 95.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 54,244 psi | 83% | 2848 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,163 psi | 65% | 2792 fps | 97% |
| Bofors RP3 | <<locked>> | 80% | 35,491 psi | 55% | 2651 fps | 97.3% |
| Bofors RP7 | <<locked>> | 94% | 50,314 psi | 77% | 2900 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,804 psi | 72% | 2795 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,656 psi | 67% | 2822 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,153 psi | 74% | 2969 fps | 98.7% |
| Hodgdon H322 | <<locked>> | 80% | 51,372 psi | 79% | 2910 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,475 psi | 81% | 2936 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 39,001 psi | 60% | 2713 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 94% | 46,905 psi | 72% | 2930 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 96% | 54,360 psi | 84% | 3009 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 43,366 psi | 67% | 2805 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 32,880 psi | 51% | 2595 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,117 psi | 60% | 2766 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 96% | 50,647 psi | 78% | 3015 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,179 psi | 40% | 1647 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,553 psi | 64% | 2753 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 42,641 psi | 66% | 2805 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,377 psi | 59% | 2667 fps | 96.6% |
| IMR 4166 Enduron | <<locked>> | 86% | 49,298 psi | 76% | 2858 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 52,518 psi | 81% | 2835 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 50,299 psi | 77% | 2920 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 49,023 psi | 75% | 2881 fps | 95.4% |
| IMR 4831 | <<locked>> | 90% | 36,869 psi | 57% | 2707 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 39,697 psi | 61% | 2753 fps | 97.5% |
| IMR 8208 XBR | <<locked>> | 80% | 45,034 psi | 69% | 2805 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 50,894 psi | 78% | 2894 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,829 psi | 64% | 2769 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 43,178 psi | 66% | 2730 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 38,218 psi | 59% | 2674 fps | 98.3% |
| Lovex S065 | <<locked>> | 90% | 42,772 psi | 66% | 2766 fps | 95.4% |
| Lovex S070 | <<locked>> | 94% | 46,108 psi | 71% | 2851 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 42,177 psi | 65% | 2746 fps | 99% |
| Norma 202 | <<locked>> | 80% | 42,221 psi | 65% | 2756 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,145 psi | 59% | 2707 fps | 97% |
| Norma URP | <<locked>> | 90% | 38,319 psi | 59% | 2753 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 37,536 psi | 58% | 2713 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 96% | 45,803 psi | 70% | 2913 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 44,991 psi | 69% | 2802 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,382 psi | 68% | 2825 fps | 98.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,573 psi | 75% | 2854 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,411 psi | 41% | 1683 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,502 psi | 78% | 2894 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 44,991 psi | 69% | 2812 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,292 psi | 62% | 2818 fps | 97% |
| ReloadSwiss RS 60 | 53.6 gr | 80% | 33,127 psi | 51% | 2674 fps | 98.1% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 37,942 psi | 58% | 2769 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 41,046 psi | 63% | 2841 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 45,963 psi | 71% | 2795 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,943 psi | 61% | 2690 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 80% | 33,373 psi | 51% | 2592 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 94% | 50,314 psi | 77% | 2900 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 42,772 psi | 66% | 2766 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,829 psi | 64% | 2769 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 38,218 psi | 59% | 2674 fps | 98.3% |
| Shooters World SW4350 | <<locked>> | 94% | 46,108 psi | 71% | 2851 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 53,330 psi | 82% | 2913 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,360 psi | 53% | 2641 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 53,258 psi | 82% | 2897 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,149 psi | 66% | 2772 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,365 psi | 64% | 2756 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,511 psi | 67% | 2703 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,056 psi | 55% | 2562 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 48,254 psi | 74% | 2822 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 48,733 psi | 75% | 2887 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 43,192 psi | 66% | 2707 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,917 psi | 66% | 2772 fps | 98.1% |
| Somchem S355 | <<locked>> | 80% | 34,432 psi | 53% | 2605 fps | 96.3% |
| Somchem S365 | <<locked>> | 86% | 30,110 psi | 46% | 2582 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 49,124 psi | 76% | 2776 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,758 psi | 67% | 2700 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,334 psi | 61% | 2684 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,972 psi | 61% | 2687 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 32,619 psi | 50% | 2536 fps | 97.2% |
| Vihtavuori N160 | <<locked>> | 88% | 37,681 psi | 58% | 2703 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 44,962 psi | 69% | 2799 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 38,595 psi | 59% | 2674 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 39,566 psi | 61% | 2759 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 96% | 35,288 psi | 54% | 2733 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 33,199 psi | 51% | 2566 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 44,599 psi | 69% | 2848 fps | 99.7% |
| Winchester 760 | <<locked>> | 94% | 46,905 psi | 72% | 2930 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,741 psi | 63% | 2756 fps | 98.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 105 powders for .300 Rem. SA Ultra Mag. loaded with the .308 | 150gr | Speer Boat-Tail. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,163 fps; across all powders the maximum-charge window runs from 1,841 fps to 3,163 fps. Accurate 4350 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, Alliant Reloder-17 rank at the top here: for .300 Rem. SA Ultra Mag. with the .308 | 150gr | Speer Boat-Tail they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.