Load Specifications
Load data in caliber .300 Rem. SA Ultra Mag. with .308 | 165gr | Barnes X BT bullet and 100 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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>> | 84% | 56,797 psi | 87% | 2746 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 58,813 psi | 90% | 2822 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 56,565 psi | 87% | 2782 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 56,927 psi | 88% | 2835 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 57,479 psi | 88% | 2808 fps | 96.9% |
| Accurate 4064 | <<locked>> | 90% | 55,999 psi | 86% | 2822 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 58,392 psi | 90% | 2946 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 88% | 58,726 psi | 90% | 2890 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 56,057 psi | 86% | 2838 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 57,464 psi | 88% | 2838 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 58,494 psi | 90% | 2812 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 58,146 psi | 89% | 3012 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,260 psi | 87% | 2864 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,855 psi | 87% | 2884 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,376 psi | 85% | 2943 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,507 psi | 87% | 2979 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,422 psi | 62% | 2690 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,976 psi | 69% | 2848 fps | 97.7% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 58,363 psi | 90% | 2907 fps | 99.7% |
| Bofors RP3 | <<locked>> | 92% | 57,406 psi | 88% | 2884 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 56,942 psi | 88% | 2844 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,999 psi | 86% | 2776 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 57,087 psi | 88% | 2874 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 58,798 psi | 90% | 2969 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 82% | 58,189 psi | 90% | 2831 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 58,102 psi | 89% | 2894 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 98% | 57,072 psi | 88% | 2940 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 96% | 57,725 psi | 89% | 2897 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 86% | 55,825 psi | 86% | 2851 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,721 psi | 80% | 2822 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 58,523 psi | 90% | 2933 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 57,856 psi | 89% | 2972 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,839 psi | 55% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,594 psi | 87% | 2848 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 55,753 psi | 86% | 2835 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,564 psi | 85% | 2822 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,492 psi | 85% | 2795 fps | 97.4% |
| IMR 4198 | <<locked>> | 82% | 58,450 psi | 90% | 2736 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,652 psi | 87% | 2864 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 96% | 58,523 psi | 90% | 2874 fps | 97.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,810 psi | 84% | 2881 fps | 99.4% |
| IMR 4895 | <<locked>> | 90% | 58,291 psi | 90% | 2913 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 57,464 psi | 88% | 2838 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 58,697 psi | 90% | 2835 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,550 psi | 85% | 2825 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 57,928 psi | 89% | 2812 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 55,782 psi | 86% | 2822 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 58,305 psi | 90% | 2871 fps | 98.9% |
| Lovex S070 | <<locked>> | 98% | 55,724 psi | 86% | 2854 fps | 97.7% |
| Norma 201 | <<locked>> | 88% | 57,986 psi | 89% | 2841 fps | 100% |
| Norma 202 | <<locked>> | 88% | 58,146 psi | 89% | 2838 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,086 psi | 86% | 2874 fps | 99.9% |
| Norma 204ᴾ | <<locked>> | 100% | 57,551 psi | 89% | 2913 fps | 95.9% |
| Norma URPᴾ | <<locked>> | 100% | 56,768 psi | 87% | 2927 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 90% | 56,318 psi | 87% | 2894 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,550 psi | 85% | 2923 fps | 98.3% |
| Ramshot TAC | <<locked>> | 86% | 57,827 psi | 89% | 2858 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 86% | 57,406 psi | 88% | 2877 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 58,523 psi | 90% | 2841 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,434 psi | 56% | 1772 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 57,101 psi | 88% | 2822 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 58,088 psi | 89% | 2871 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 57,145 psi | 88% | 2949 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,318 psi | 87% | 2982 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 57,595 psi | 89% | 2966 fps | 99.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 57,072 psi | 88% | 2989 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 84% | 56,028 psi | 86% | 2779 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 58,436 psi | 90% | 2838 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 57,217 psi | 88% | 2874 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 56,942 psi | 88% | 2844 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 58,305 psi | 90% | 2871 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,550 psi | 85% | 2825 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,782 psi | 86% | 2822 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 55,724 psi | 86% | 2854 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 58,175 psi | 89% | 2927 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,637 psi | 87% | 2838 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,913 psi | 88% | 2861 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,535 psi | 85% | 2726 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 58,769 psi | 90% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 58,798 psi | 90% | 2825 fps | 97.9% |
| Somchem S321 | <<locked>> | 82% | 55,390 psi | 85% | 2825 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 58,537 psi | 90% | 2772 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,898 psi | 86% | 2828 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 57,305 psi | 88% | 2871 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,285 psi | 79% | 2881 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 58,624 psi | 90% | 2733 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,593 psi | 86% | 2710 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 57,899 psi | 89% | 2799 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 58,407 psi | 90% | 2812 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 58,378 psi | 90% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,637 psi | 86% | 2871 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 86% | 58,276 psi | 90% | 2841 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,797 psi | 87% | 2815 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 58,450 psi | 90% | 2930 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,280 psi | 68% | 2772 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 56,057 psi | 86% | 2851 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 58,030 psi | 89% | 2887 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 57,072 psi | 88% | 2940 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,680 psi | 56% | 2697 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,724 psi | 87% | 2871 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% | 50,546 psi | 78% | 2657 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 55,100 psi | 85% | 2769 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,396 psi | 68% | 2602 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,111 psi | 77% | 2733 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 50,691 psi | 78% | 2700 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 41,858 psi | 64% | 2595 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 34,925 psi | 54% | 2523 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 46,151 psi | 71% | 2687 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 39,566 psi | 61% | 2543 fps | 97.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,022 psi | 74% | 2690 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 48,646 psi | 75% | 2684 fps | 100% |
| Alliant Power Pro 2000-MR | 50.7 gr | 80% | 42,119 psi | 65% | 2720 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,523 psi | 61% | 2572 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,076 psi | 65% | 2628 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 84% | 34,751 psi | 53% | 2523 fps | 95% |
| Alliant Reloder-17 | 49.9 gr | 80% | 34,243 psi | 53% | 2539 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 32,314 psi | 50% | 2487 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 37,101 psi | 57% | 2664 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,339 psi | 70% | 2690 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 39,566 psi | 61% | 2582 fps | 98.8% |
| Bofors RP7 | <<locked>> | 90% | 47,747 psi | 73% | 2690 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,734 psi | 77% | 2677 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,384 psi | 73% | 2723 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,459 psi | 79% | 2858 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 80% | 54,665 psi | 84% | 2782 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,074 psi | 62% | 2575 fps | 96.2% |
| Hodgdon H414 | <<locked>> | 90% | 44,382 psi | 68% | 2720 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 92% | 51,155 psi | 79% | 2792 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 46,615 psi | 72% | 2700 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 30,342 psi | 47% | 2375 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,641 psi | 66% | 2674 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 92% | 47,137 psi | 73% | 2789 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,876 psi | 41% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,628 psi | 69% | 2651 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 46,282 psi | 71% | 2694 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,568 psi | 64% | 2575 fps | 98% |
| IMR 4166 Enduron | <<locked>> | 82% | 46,427 psi | 71% | 2641 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 55,187 psi | 85% | 2697 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 47,572 psi | 73% | 2713 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,354 psi | 71% | 2671 fps | 95.3% |
| IMR 4831 | <<locked>> | 86% | 35,911 psi | 55% | 2530 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 43,018 psi | 66% | 2657 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 80% | 48,022 psi | 74% | 2690 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 55,013 psi | 85% | 2782 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 45,963 psi | 71% | 2677 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,180 psi | 71% | 2625 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 41,887 psi | 64% | 2589 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 41,263 psi | 63% | 2575 fps | 95.6% |
| Lovex S070 | <<locked>> | 90% | 44,121 psi | 68% | 2651 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 45,847 psi | 71% | 2648 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 45,832 psi | 71% | 2654 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,481 psi | 64% | 2618 fps | 98.4% |
| Norma 204 | <<locked>> | 98% | 53,780 psi | 83% | 2858 fps | 95.1% |
| Norma URP | <<locked>> | 84% | 34,925 psi | 54% | 2516 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 40,886 psi | 63% | 2631 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 92% | 43,439 psi | 67% | 2707 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 48,109 psi | 74% | 2700 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,543 psi | 73% | 2720 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,822 psi | 80% | 2740 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,267 psi | 42% | 1581 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 53,737 psi | 83% | 2772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,757 psi | 66% | 2608 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,005 psi | 68% | 2730 fps | 98.4% |
| ReloadSwiss RS 60 | 49.9 gr | 80% | 36,245 psi | 56% | 2605 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 36,753 psi | 57% | 2589 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 38,885 psi | 60% | 2638 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 50,270 psi | 77% | 2690 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,700 psi | 67% | 2602 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 37,289 psi | 57% | 2526 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 47,747 psi | 73% | 2690 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 41,263 psi | 63% | 2575 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,963 psi | 71% | 2677 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,887 psi | 64% | 2589 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 44,121 psi | 68% | 2651 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,652 psi | 58% | 2566 fps | 97.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,731 psi | 72% | 2677 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,614 psi | 69% | 2657 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,775 psi | 72% | 2595 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,189 psi | 60% | 2467 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,905 psi | 71% | 2621 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 52,185 psi | 80% | 2776 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,514 psi | 72% | 2598 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,166 psi | 71% | 2674 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 37,942 psi | 58% | 2530 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 28,152 psi | 43% | 2372 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 52,417 psi | 81% | 2651 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,949 psi | 72% | 2585 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,149 psi | 66% | 2585 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,265 psi | 67% | 2585 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,969 psi | 55% | 2464 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 36,303 psi | 56% | 2516 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 48,428 psi | 75% | 2694 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 41,959 psi | 65% | 2582 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 35,853 psi | 55% | 2520 fps | 95% |
| Vihtavuori N555 | <<locked>> | 90% | 32,706 psi | 50% | 2513 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,053 psi | 49% | 2388 fps | 96.1% |
| Winchester 748 | <<locked>> | 80% | 47,979 psi | 74% | 2736 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 44,382 psi | 68% | 2720 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 94% | 30,719 psi | 47% | 2513 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,092 psi | 68% | 2661 fps | 99.2% |
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 116 powders for .300 Rem. SA Ultra Mag. loaded with the .308 | 165gr | Barnes X BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,012 fps; across all powders the maximum-charge window runs from 1,729 fps to 3,012 fps. Accurate 3100 gives the best case fill at 100 %, and 116 of the 116 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, ADI AR 2209 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. Alliant Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for .300 Rem. SA Ultra Mag. with the .308 | 165gr | Barnes X BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.