Load Specifications
Bullet Manufacturer:Hammer
Bullet Weight:166 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:1:12.5
Load data in caliber .300 Rem. SA Ultra Mag. with .308 | 166gr | Hammer Stone Hammer bullet and 107 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% | 55,854 psi | 86% | 2756 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 58,059 psi | 89% | 2835 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 57,638 psi | 89% | 2822 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,478 psi | 87% | 2851 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 57,798 psi | 89% | 2831 fps | 97.2% |
| Accurate 4064 | <<locked>> | 94% | 57,261 psi | 88% | 2867 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,795 psi | 83% | 2904 fps | 99.4% |
| Accurate LT-30 | <<locked>> | 82% | 58,146 psi | 89% | 2743 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 58,639 psi | 90% | 2772 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 58,784 psi | 90% | 2913 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 56,144 psi | 86% | 2858 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,856 psi | 89% | 2864 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 58,421 psi | 90% | 2831 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,840 psi | 86% | 2917 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,824 psi | 84% | 2976 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,767 psi | 86% | 2877 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,651 psi | 86% | 2762 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,710 psi | 87% | 2904 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,996 psi | 80% | 2907 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 98% | 57,058 psi | 88% | 3005 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,796 psi | 57% | 2635 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,915 psi | 63% | 2782 fps | 96.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 57,696 psi | 89% | 2743 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,042 psi | 85% | 2874 fps | 99.6% |
| Bofors RP3 | <<locked>> | 94% | 56,521 psi | 87% | 2894 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 56,826 psi | 87% | 2864 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,144 psi | 86% | 2799 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 57,072 psi | 88% | 2894 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,405 psi | 85% | 2940 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 58,595 psi | 90% | 2854 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,854 psi | 86% | 2831 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 57,769 psi | 89% | 2907 fps | 99.5% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 56,985 psi | 88% | 2956 fps | 98% |
| Hodgdon H4350 | <<locked>> | 98% | 57,986 psi | 89% | 2920 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 88% | 55,753 psi | 86% | 2871 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,066 psi | 74% | 2782 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 58,755 psi | 90% | 2953 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 58,508 psi | 90% | 2999 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,186 psi | 54% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 57,130 psi | 88% | 2874 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,550 psi | 85% | 2854 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,535 psi | 85% | 2838 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,912 psi | 86% | 2822 fps | 97.7% |
| IMR 4198 | <<locked>> | 82% | 55,651 psi | 86% | 2720 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,330 psi | 82% | 2831 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,463 psi | 85% | 2844 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,923 psi | 78% | 2841 fps | 99.2% |
| IMR 4895 | <<locked>> | 92% | 58,189 psi | 90% | 2933 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 57,856 psi | 89% | 2864 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 57,885 psi | 89% | 2844 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 58,392 psi | 90% | 2884 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 58,334 psi | 90% | 2838 fps | 100% |
| Lovex S062 | <<locked>> | 94% | 58,624 psi | 90% | 2881 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 57,928 psi | 89% | 2887 fps | 99% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,129 psi | 85% | 2867 fps | 97.8% |
| Norma 201 | <<locked>> | 90% | 57,203 psi | 88% | 2854 fps | 100% |
| Norma 202 | <<locked>> | 90% | 57,928 psi | 89% | 2854 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,854 psi | 86% | 2890 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 52,968 psi | 81% | 2890 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 92% | 56,623 psi | 87% | 2917 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,851 psi | 80% | 2881 fps | 97.9% |
| Ramshot TAC | <<locked>> | 88% | 58,291 psi | 90% | 2884 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 88% | 57,870 psi | 89% | 2900 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 86% | 58,798 psi | 90% | 2864 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,592 psi | 55% | 1768 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 57,188 psi | 88% | 2841 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 58,073 psi | 89% | 2887 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 57,159 psi | 88% | 2969 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 56,739 psi | 87% | 3002 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,650 psi | 83% | 2927 fps | 99.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,693 psi | 83% | 2953 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 88% | 57,841 psi | 89% | 2831 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 57,667 psi | 89% | 2851 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 56,057 psi | 86% | 2881 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 56,826 psi | 87% | 2864 fps | 97.3% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 57,928 psi | 89% | 2887 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 90% | 58,392 psi | 90% | 2884 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 58,624 psi | 90% | 2881 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,129 psi | 85% | 2867 fps | 97.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 57,101 psi | 88% | 2815 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 58,523 psi | 90% | 2949 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,768 psi | 87% | 2789 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,478 psi | 87% | 2858 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 57,058 psi | 88% | 2881 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,637 psi | 86% | 2746 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,666 psi | 86% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 58,668 psi | 90% | 2841 fps | 98% |
| Somchem S321 | <<locked>> | 84% | 55,434 psi | 85% | 2844 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 58,175 psi | 89% | 2789 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,159 psi | 86% | 2851 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 56,536 psi | 87% | 2881 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,224 psi | 73% | 2838 fps | 100% |
| Vihtavuori N130 | <<locked>> | 86% | 58,610 psi | 90% | 2753 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,811 psi | 86% | 2733 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 57,435 psi | 88% | 2812 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 58,595 psi | 90% | 2835 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 58,262 psi | 90% | 2858 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,869 psi | 86% | 2890 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 88% | 58,334 psi | 90% | 2861 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,608 psi | 87% | 2831 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,723 psi | 84% | 2894 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,798 psi | 61% | 2707 fps | 97.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,652 psi | 87% | 2874 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 58,233 psi | 90% | 2910 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 57,305 psi | 88% | 2959 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,619 psi | 50% | 2605 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 90% | 57,043 psi | 88% | 2890 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% | 46,122 psi | 71% | 2618 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,488 psi | 78% | 2730 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,479 psi | 59% | 2533 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,847 psi | 71% | 2690 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,253 psi | 73% | 2667 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 36,390 psi | 56% | 2526 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,143 psi | 54% | 2556 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 54,897 psi | 84% | 2700 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 55,317 psi | 85% | 2730 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 42,525 psi | 65% | 2644 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 80% | 36,201 psi | 56% | 2493 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,672 psi | 69% | 2657 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 44,817 psi | 69% | 2648 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,272 psi | 80% | 2861 fps | 99.9% |
| Alliant Power Pro 2000-MR | 51.3 gr | 80% | 38,711 psi | 60% | 2667 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,723 psi | 55% | 2516 fps | 98% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,127 psi | 80% | 2713 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,276 psi | 59% | 2575 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,723 psi | 55% | 2575 fps | 95.7% |
| Alliant Reloder-17 | 50.5 gr | 80% | 30,690 psi | 47% | 2470 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,371 psi | 47% | 2461 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 38,043 psi | 59% | 2717 fps | 95.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 54,070 psi | 83% | 2697 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,829 psi | 64% | 2648 fps | 97.6% |
| Bofors RP3 | <<locked>> | 80% | 35,085 psi | 54% | 2513 fps | 97.9% |
| Bofors RP7 | <<locked>> | 92% | 46,818 psi | 72% | 2700 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,601 psi | 72% | 2648 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,395 psi | 67% | 2677 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,037 psi | 74% | 2822 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 80% | 51,372 psi | 79% | 2756 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,156 psi | 80% | 2779 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,042 psi | 55% | 2516 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 92% | 43,584 psi | 67% | 2726 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 94% | 51,024 psi | 78% | 2808 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 42,931 psi | 66% | 2654 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,574 psi | 47% | 2415 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,986 psi | 60% | 2625 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 94% | 46,920 psi | 72% | 2805 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,020 psi | 40% | 1542 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,423 psi | 64% | 2612 fps | 98.8% |
| IMR 3031 | <<locked>> | 80% | 42,482 psi | 65% | 2654 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,985 psi | 58% | 2526 fps | 97.3% |
| IMR 4166 Enduron | <<locked>> | 84% | 46,064 psi | 71% | 2657 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 52,634 psi | 81% | 2677 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 47,195 psi | 73% | 2726 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,963 psi | 71% | 2684 fps | 95.5% |
| IMR 4831 | <<locked>> | 88% | 34,026 psi | 52% | 2513 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 39,218 psi | 60% | 2608 fps | 98.1% |
| IMR 8208 XBR | <<locked>> | 80% | 44,672 psi | 69% | 2657 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 50,343 psi | 77% | 2740 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,423 psi | 64% | 2625 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 42,873 psi | 66% | 2585 fps | 98.7% |
| Lovex S062 | <<locked>> | 80% | 37,695 psi | 58% | 2533 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 39,769 psi | 61% | 2572 fps | 95.4% |
| Lovex S070 | <<locked>> | 92% | 42,902 psi | 66% | 2654 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 41,626 psi | 64% | 2598 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 42,076 psi | 65% | 2612 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,623 psi | 58% | 2562 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 35,650 psi | 55% | 2562 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 37,289 psi | 57% | 2579 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 94% | 42,540 psi | 65% | 2713 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 44,657 psi | 69% | 2661 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,005 psi | 68% | 2677 fps | 98.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,428 psi | 75% | 2707 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,266 psi | 40% | 1578 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,328 psi | 77% | 2743 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,872 psi | 64% | 2615 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,161 psi | 62% | 2677 fps | 97.7% |
| ReloadSwiss RS 60 | 50.5 gr | 80% | 32,721 psi | 50% | 2539 fps | 98.8% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,027 psi | 54% | 2575 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,985 psi | 58% | 2641 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 45,295 psi | 70% | 2641 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,552 psi | 61% | 2549 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 32,837 psi | 51% | 2454 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 92% | 46,818 psi | 72% | 2700 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,769 psi | 61% | 2572 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,423 psi | 64% | 2625 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 37,695 psi | 58% | 2533 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 92% | 42,902 psi | 66% | 2654 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 53,214 psi | 82% | 2762 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,040 psi | 52% | 2507 fps | 96.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 53,156 psi | 82% | 2740 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,670 psi | 66% | 2628 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,176 psi | 63% | 2615 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,149 psi | 66% | 2559 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,723 psi | 55% | 2425 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 44,947 psi | 69% | 2628 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 48,312 psi | 74% | 2736 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,743 psi | 66% | 2559 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,583 psi | 66% | 2631 fps | 98.6% |
| Somchem S355 | <<locked>> | 80% | 33,895 psi | 52% | 2467 fps | 97% |
| Somchem S365 | <<locked>> | 84% | 27,804 psi | 43% | 2395 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 48,849 psi | 75% | 2621 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,482 psi | 67% | 2552 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,943 psi | 60% | 2536 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,711 psi | 61% | 2546 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,155 psi | 49% | 2405 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 86% | 35,027 psi | 54% | 2513 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 44,889 psi | 69% | 2654 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 38,218 psi | 59% | 2533 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 36,637 psi | 56% | 2566 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 94% | 32,590 psi | 50% | 2539 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,676 psi | 47% | 2379 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 44,367 psi | 68% | 2697 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 43,801 psi | 67% | 2730 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,618 psi | 47% | 2543 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,654 psi | 63% | 2621 fps | 98.8% |
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 121 powders for .300 Rem. SA Ultra Mag. loaded with the .308 | 166gr | Hammer Stone Hammer. Alliant Reloder-17 delivers the highest muzzle velocity at 3,005 fps; across all powders the maximum-charge window runs from 1,729 fps to 3,005 fps. Accurate 3100 gives the best case fill at 100 %, and 121 of the 121 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 48–90 %, leaving at least 10 % headroom. The 166.0 gr projectile in 0.308" calls for a 1:12.5 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. 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 | 166gr | Hammer Stone Hammer they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 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.