Load Specifications
Bullet:.308 | 181gr | RWS H-Mantel
Bullet Manufacturer:RWS
Bullet Weight:181 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:1:14.0
Load data in caliber .300 Rem. SA Ultra Mag. with .308 | 181gr | RWS H-Mantel bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, Hodgdon Superformance 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>> | 84% | 57,638 psi | 89% | 2654 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 56,797 psi | 87% | 2684 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 58,407 psi | 90% | 2749 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,259 psi | 85% | 2690 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,540 psi | 67% | 2602 fps | 97.3% |
| Accurate 4064 | <<locked>> | 90% | 56,492 psi | 87% | 2730 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 56,724 psi | 87% | 2825 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 56,681 psi | 87% | 2762 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 57,653 psi | 89% | 2762 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 51,358 psi | 79% | 2749 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,608 psi | 86% | 2713 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 56,710 psi | 87% | 2680 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 56,594 psi | 87% | 2887 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 50,923 psi | 78% | 2746 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 57,783 psi | 89% | 2782 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 58,363 psi | 90% | 2805 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 57,522 psi | 88% | 2874 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 55,114 psi | 85% | 2858 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 50,212 psi | 77% | 2736 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,437 psi | 64% | 2631 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,325 psi | 71% | 2792 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 56,652 psi | 87% | 2782 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 58,682 psi | 90% | 2799 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 58,537 psi | 90% | 2779 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 57,087 psi | 88% | 2690 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,042 psi | 85% | 2743 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 57,348 psi | 88% | 2844 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 55,854 psi | 86% | 2766 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 96% | 55,695 psi | 86% | 2822 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 94% | 56,260 psi | 87% | 2785 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 86% | 57,261 psi | 88% | 2772 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,838 psi | 83% | 2753 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,985 psi | 88% | 2805 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 56,246 psi | 87% | 2861 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,723 psi | 55% | 1663 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 58,334 psi | 90% | 2772 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 57,377 psi | 88% | 2746 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,101 psi | 88% | 2746 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,884 psi | 88% | 2730 fps | 98.6% |
| IMR 4350 | <<locked>> | 98% | 55,463 psi | 85% | 2756 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,884 psi | 88% | 2759 fps | 98.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 57,014 psi | 88% | 2812 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 56,289 psi | 87% | 2785 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 55,608 psi | 86% | 2713 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 56,695 psi | 87% | 2740 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,014 psi | 86% | 2690 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 56,985 psi | 88% | 2740 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 56,347 psi | 87% | 2749 fps | 99.4% |
| Lovex S070 | <<locked>> | 98% | 57,246 psi | 88% | 2785 fps | 98.9% |
| Norma 201 | <<locked>> | 86% | 55,506 psi | 85% | 2710 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,115 psi | 86% | 2707 fps | 100% |
| Norma 203B | <<locked>> | 90% | 57,595 psi | 89% | 2792 fps | 100% |
| Norma 204 | <<locked>> | 98% | 55,970 psi | 86% | 2805 fps | 97% |
| Norma MRPᴾ | <<locked>> | 100% | 46,195 psi | 71% | 2749 fps | 96.8% |
| Norma URP | <<locked>> | 98% | 55,376 psi | 85% | 2808 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 90% | 58,552 psi | 90% | 2822 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 58,015 psi | 89% | 2861 fps | 99.4% |
| Ramshot TAC | <<locked>> | 84% | 55,825 psi | 86% | 2736 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,593 psi | 86% | 2753 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 56,246 psi | 87% | 2713 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,274 psi | 56% | 1703 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 58,668 psi | 90% | 2740 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 56,043 psi | 86% | 2749 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,506 psi | 85% | 2822 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 58,740 psi | 90% | 2907 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 56,202 psi | 86% | 2844 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 55,419 psi | 85% | 2874 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 84% | 56,275 psi | 87% | 2684 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,956 psi | 86% | 2707 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 58,537 psi | 90% | 2792 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 48,791 psi | 75% | 2717 fps | 96% |
| Rottweil R 907 | <<locked>> | 96% | 58,537 psi | 90% | 2779 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 56,347 psi | 87% | 2749 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 86% | 56,695 psi | 87% | 2740 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,985 psi | 88% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 57,246 psi | 88% | 2785 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 56,797 psi | 87% | 2805 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 58,102 psi | 89% | 2769 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 58,798 psi | 90% | 2789 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,884 psi | 88% | 2644 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 57,087 psi | 88% | 2641 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 56,608 psi | 87% | 2707 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 48,327 psi | 74% | 2713 fps | 95.9% |
| Somchem S321 | <<locked>> | 82% | 56,985 psi | 88% | 2746 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 56,260 psi | 87% | 2644 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 57,725 psi | 89% | 2756 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 58,653 psi | 90% | 2789 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 53,693 psi | 83% | 2812 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 49,545 psi | 76% | 2697 fps | 97% |
| Vihtavuori N130 | <<locked>> | 82% | 56,521 psi | 87% | 2605 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 57,174 psi | 88% | 2628 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,811 psi | 86% | 2667 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 56,405 psi | 87% | 2684 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 56,565 psi | 87% | 2720 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 58,102 psi | 89% | 2805 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 55,956 psi | 86% | 2710 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 58,175 psi | 89% | 2730 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 57,087 psi | 88% | 2812 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,701 psi | 70% | 2703 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 58,233 psi | 90% | 2782 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 56,289 psi | 87% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 55,695 psi | 86% | 2822 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,130 psi | 57% | 2648 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 58,740 psi | 90% | 2795 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% | 51,039 psi | 79% | 2569 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,743 psi | 67% | 2503 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,937 psi | 78% | 2651 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,699 psi | 66% | 2480 fps | 95% |
| Accurate 3100 | <<locked>> | 96% | 38,029 psi | 59% | 2497 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 41,336 psi | 64% | 2503 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 32,721 psi | 50% | 2395 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 47,094 psi | 72% | 2615 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 39,856 psi | 61% | 2467 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 98% | 48,138 psi | 74% | 2694 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,139 psi | 76% | 2618 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 49,893 psi | 77% | 2595 fps | 100% |
| Alliant Power Pro 2000-MR | 51.6 gr | 80% | 42,873 psi | 66% | 2654 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 47,805 psi | 74% | 2694 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,856 psi | 61% | 2493 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,714 psi | 66% | 2556 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,908 psi | 48% | 2352 fps | 95% |
| Alliant Reloder-17 | 50.8 gr | 80% | 34,316 psi | 53% | 2470 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 98% | 47,137 psi | 73% | 2684 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,645 psi | 44% | 2320 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 92% | 34,969 psi | 54% | 2546 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,398 psi | 71% | 2621 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 39,581 psi | 61% | 2500 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 42,844 psi | 66% | 2520 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,560 psi | 78% | 2598 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,109 psi | 74% | 2641 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 53,243 psi | 82% | 2785 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,234 psi | 62% | 2503 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 40,074 psi | 62% | 2552 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 88% | 46,441 psi | 71% | 2625 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 47,529 psi | 73% | 2625 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,398 psi | 44% | 2257 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,511 psi | 67% | 2598 fps | 99.9% |
| Hodgdon Superformance | 59.1 gr | 88% | 42,235 psi | 65% | 2618 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,585 psi | 41% | 1483 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,469 psi | 70% | 2575 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 47,355 psi | 73% | 2608 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,872 psi | 64% | 2500 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,266 psi | 68% | 2523 fps | 96.3% |
| IMR 4350 | <<locked>> | 90% | 43,076 psi | 66% | 2549 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 41,945 psi | 65% | 2503 fps | 95.6% |
| IMR 4831 | <<locked>> | 82% | 31,836 psi | 49% | 2356 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 43,787 psi | 67% | 2585 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 49,139 psi | 76% | 2618 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,325 psi | 71% | 2589 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,847 psi | 72% | 2549 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 42,105 psi | 65% | 2507 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 36,767 psi | 57% | 2405 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 39,421 psi | 61% | 2480 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 46,021 psi | 71% | 2566 fps | 100% |
| Norma 202 | <<locked>> | 80% | 46,456 psi | 71% | 2569 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,090 psi | 65% | 2546 fps | 99.3% |
| Norma 204 | <<locked>> | 94% | 48,936 psi | 75% | 2690 fps | 95.5% |
| Norma MRP | <<locked>> | 96% | 40,437 psi | 62% | 2631 fps | 95% |
| Norma URP | <<locked>> | 82% | 32,924 psi | 51% | 2392 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 41,597 psi | 64% | 2556 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 36,651 psi | 56% | 2484 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 49,037 psi | 75% | 2631 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,675 psi | 75% | 2648 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,736 psi | 81% | 2664 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,948 psi | 41% | 1519 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 54,868 psi | 84% | 2687 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,582 psi | 62% | 2487 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,121 psi | 69% | 2657 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,521 psi | 56% | 2533 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 32,460 psi | 50% | 2408 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 34,592 psi | 53% | 2464 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 49,995 psi | 77% | 2595 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,758 psi | 67% | 2516 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 37,159 psi | 57% | 2444 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 45,716 psi | 70% | 2664 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 86% | 42,844 psi | 66% | 2520 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 82% | 36,767 psi | 57% | 2405 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,325 psi | 71% | 2589 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,105 psi | 65% | 2507 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 39,421 psi | 61% | 2480 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,058 psi | 59% | 2493 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,427 psi | 73% | 2608 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,324 psi | 70% | 2582 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,152 psi | 73% | 2510 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,407 psi | 61% | 2385 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 40,930 psi | 63% | 2451 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 45,295 psi | 70% | 2657 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 53,316 psi | 82% | 2697 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,862 psi | 72% | 2513 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,210 psi | 73% | 2602 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 37,985 psi | 58% | 2451 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 27,702 psi | 43% | 2297 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 43,540 psi | 67% | 2595 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 53,084 psi | 82% | 2559 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,558 psi | 73% | 2500 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,453 psi | 67% | 2493 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,874 psi | 67% | 2503 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,056 psi | 55% | 2385 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 32,271 psi | 50% | 2346 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 49,269 psi | 76% | 2615 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,337 psi | 65% | 2497 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 33,953 psi | 52% | 2398 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 88% | 30,864 psi | 47% | 2392 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,981 psi | 49% | 2323 fps | 97.5% |
| Winchester 748 | <<locked>> | 80% | 49,081 psi | 76% | 2657 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 40,074 psi | 62% | 2552 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 26,905 psi | 41% | 2336 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,020 psi | 69% | 2589 fps | 99.8% |
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 104 powders for .300 Rem. SA Ultra Mag. loaded with the .308 | 181gr | RWS H-Mantel. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,907 fps; across all powders the maximum-charge window runs from 1,663 fps to 2,907 fps. Accurate 3100 gives the best case fill at 100 %, and 104 of the 104 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 181.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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 Power Pro 2000-MR, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .300 Rem. SA Ultra Mag. with the .308 | 181gr | RWS H-Mantel 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.