Load Specifications
Bullet:.308 | 180gr | Speer RN
Bullet Manufacturer:Speer
Bullet Weight:180 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:1:16.0
Load data in caliber .300 Rem. SA Ultra Mag. with .308 | 180gr | Speer RN 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, ReloadSwiss RS 70 and Hodgdon Superformance.
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>> | 82% | 55,680 psi | 86% | 2648 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 58,218 psi | 90% | 2720 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 56,188 psi | 86% | 2740 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,710 psi | 87% | 2733 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,353 psi | 70% | 2651 fps | 97.8% |
| Accurate 4064 | <<locked>> | 90% | 58,479 psi | 90% | 2772 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 58,711 psi | 90% | 2871 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 58,233 psi | 90% | 2805 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,593 psi | 86% | 2756 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,736 psi | 81% | 2795 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,913 psi | 88% | 2749 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 58,436 psi | 90% | 2720 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 58,233 psi | 90% | 2930 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,663 psi | 81% | 2795 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,115 psi | 86% | 2779 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 56,391 psi | 87% | 2799 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,738 psi | 86% | 2871 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 57,217 psi | 88% | 2904 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,880 psi | 80% | 2785 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,830 psi | 66% | 2674 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,637 psi | 58% | 2575 fps | 96.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,370 psi | 74% | 2848 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 58,189 psi | 90% | 2825 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 56,811 psi | 87% | 2795 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,463 psi | 87% | 2772 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 58,407 psi | 90% | 2730 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,797 psi | 87% | 2785 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 57,508 psi | 88% | 2808 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 96% | 57,435 psi | 88% | 2867 fps | 99% |
| Hodgdon H4350 | <<locked>> | 94% | 57,682 psi | 89% | 2828 fps | 98% |
| Hodgdon H4895 | <<locked>> | 84% | 55,172 psi | 85% | 2762 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,695 psi | 86% | 2795 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 58,711 psi | 90% | 2848 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 58,146 psi | 89% | 2910 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,853 psi | 55% | 1683 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,362 psi | 87% | 2766 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,666 psi | 86% | 2743 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 58,566 psi | 90% | 2785 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 58,436 psi | 90% | 2776 fps | 99% |
| IMR 4350 | <<locked>> | 98% | 57,014 psi | 88% | 2802 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 94% | 58,334 psi | 90% | 2802 fps | 98.9% |
| IMR 4831 | <<locked>> | 98% | 55,245 psi | 85% | 2808 fps | 99.9% |
| IMR 4895 | <<locked>> | 88% | 57,856 psi | 89% | 2825 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 56,913 psi | 88% | 2749 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 58,334 psi | 90% | 2776 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 57,246 psi | 88% | 2726 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 58,798 psi | 90% | 2782 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 58,059 psi | 89% | 2795 fps | 99.6% |
| Lovex S070 | <<locked>> | 96% | 55,506 psi | 85% | 2782 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,695 psi | 58% | 2507 fps | 95.8% |
| Norma 201 | <<locked>> | 86% | 56,811 psi | 87% | 2746 fps | 100% |
| Norma 202 | <<locked>> | 86% | 57,479 psi | 88% | 2743 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,593 psi | 86% | 2785 fps | 100% |
| Norma 204 | <<locked>> | 98% | 57,812 psi | 89% | 2851 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 47,964 psi | 74% | 2802 fps | 97.5% |
| Norma URP | <<locked>> | 98% | 57,188 psi | 88% | 2851 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 56,275 psi | 87% | 2812 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 55,999 psi | 86% | 2854 fps | 99.3% |
| Ramshot TAC | <<locked>> | 84% | 57,348 psi | 88% | 2779 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 84% | 56,956 psi | 88% | 2792 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 57,580 psi | 89% | 2753 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,390 psi | 56% | 1722 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 57,783 psi | 89% | 2795 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 57,159 psi | 88% | 2867 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 56,927 psi | 88% | 2900 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 58,247 psi | 90% | 2890 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 57,450 psi | 88% | 2923 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 84% | 57,769 psi | 89% | 2723 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 57,508 psi | 88% | 2746 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,608 psi | 87% | 2785 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 54,708 psi | 84% | 2769 fps | 95.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,676 psi | 78% | 2769 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 94% | 56,463 psi | 87% | 2772 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 58,059 psi | 89% | 2795 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 58,334 psi | 90% | 2776 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 58,798 psi | 90% | 2782 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,506 psi | 85% | 2782 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 58,378 psi | 90% | 2848 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,956 psi | 86% | 2759 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,463 psi | 87% | 2776 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 58,247 psi | 90% | 2684 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 58,523 psi | 90% | 2680 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 58,262 psi | 90% | 2753 fps | 98.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,183 psi | 77% | 2762 fps | 96.5% |
| Somchem S321 | <<locked>> | 82% | 58,378 psi | 90% | 2782 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 57,537 psi | 89% | 2677 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,376 psi | 85% | 2746 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 56,826 psi | 87% | 2782 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 55,637 psi | 86% | 2854 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,300 psi | 79% | 2746 fps | 97.5% |
| Vihtavuori N130 | <<locked>> | 82% | 57,754 psi | 89% | 2638 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 58,566 psi | 90% | 2664 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 57,276 psi | 88% | 2703 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,914 psi | 89% | 2723 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 58,436 psi | 90% | 2762 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 56,275 psi | 87% | 2802 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 57,551 psi | 89% | 2753 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 56,043 psi | 86% | 2720 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 58,726 psi | 90% | 2854 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,471 psi | 73% | 2749 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,028 psi | 86% | 2772 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 57,899 psi | 89% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 57,740 psi | 89% | 2871 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,377 psi | 59% | 2700 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 56,565 psi | 87% | 2782 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% | 52,359 psi | 81% | 2605 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,020 psi | 69% | 2539 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,605 psi | 81% | 2690 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,743 psi | 67% | 2520 fps | 95.5% |
| Accurate 3100 | <<locked>> | 94% | 36,869 psi | 57% | 2487 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 42,612 psi | 66% | 2539 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,589 psi | 49% | 2379 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 48,153 psi | 74% | 2651 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 41,104 psi | 63% | 2510 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 96% | 46,354 psi | 71% | 2684 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,256 psi | 77% | 2654 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,343 psi | 79% | 2631 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,237 psi | 68% | 2697 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 46,340 psi | 71% | 2684 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,944 psi | 63% | 2533 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,801 psi | 67% | 2595 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,763 psi | 49% | 2392 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,505 psi | 55% | 2516 fps | 98.7% |
| Alliant Reloder-19 | <<locked>> | 96% | 45,730 psi | 70% | 2677 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,717 psi | 43% | 2310 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 98% | 35,491 psi | 55% | 2523 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 90% | 33,881 psi | 52% | 2533 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,514 psi | 73% | 2661 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 40,886 psi | 63% | 2539 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 41,539 psi | 64% | 2516 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,924 psi | 80% | 2638 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,588 psi | 76% | 2680 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,437 psi | 64% | 2543 fps | 98% |
| Hodgdon H414 | <<locked>> | 84% | 38,638 psi | 59% | 2536 fps | 95% |
| Hodgdon H4350 | <<locked>> | 86% | 44,918 psi | 69% | 2615 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 48,675 psi | 75% | 2661 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,269 psi | 45% | 2297 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,020 psi | 69% | 2644 fps | 100% |
| Hodgdon Superformance | 59.7 gr | 86% | 40,596 psi | 62% | 2602 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,774 psi | 41% | 1503 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,760 psi | 72% | 2618 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 48,747 psi | 75% | 2648 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,178 psi | 66% | 2543 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,426 psi | 70% | 2562 fps | 96.8% |
| IMR 4350 | <<locked>> | 88% | 41,655 psi | 64% | 2539 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,480 psi | 62% | 2493 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 30,719 psi | 47% | 2343 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 44,904 psi | 69% | 2621 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 50,256 psi | 77% | 2654 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,964 psi | 74% | 2635 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,935 psi | 74% | 2589 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 43,236 psi | 67% | 2546 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 35,433 psi | 55% | 2392 fps | 95.3% |
| Lovex S070 | <<locked>> | 84% | 38,305 psi | 59% | 2474 fps | 95.1% |
| Lovex S071 | <<locked>> | 98% | 35,331 psi | 54% | 2454 fps | 95% |
| Norma 201 | <<locked>> | 80% | 47,166 psi | 73% | 2602 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,645 psi | 73% | 2605 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,178 psi | 66% | 2582 fps | 99.5% |
| Norma 204 | <<locked>> | 92% | 47,181 psi | 73% | 2680 fps | 95.3% |
| Norma MRP | <<locked>> | 96% | 41,945 psi | 65% | 2684 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 31,966 psi | 49% | 2382 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 43,004 psi | 66% | 2602 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 37,710 psi | 58% | 2526 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 50,343 psi | 77% | 2674 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,082 psi | 77% | 2690 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 54,085 psi | 83% | 2703 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,137 psi | 42% | 1539 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,655 psi | 64% | 2526 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,775 psi | 72% | 2703 fps | 99.6% |
| ReloadSwiss RS 60 | 52.6 gr | 80% | 37,797 psi | 58% | 2575 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,504 psi | 52% | 2451 fps | 95.9% |
| ReloadSwiss RS 70 | 56.1 gr | 84% | 35,766 psi | 55% | 2513 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 51,256 psi | 79% | 2631 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,904 psi | 69% | 2556 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,464 psi | 59% | 2487 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 98% | 51,111 psi | 79% | 2713 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 96% | 44,367 psi | 68% | 2657 fps | 95% |
| Rottweil R 907 | <<locked>> | 84% | 41,539 psi | 64% | 2516 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,433 psi | 55% | 2392 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,964 psi | 74% | 2635 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,236 psi | 67% | 2546 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 38,305 psi | 59% | 2474 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,465 psi | 61% | 2536 fps | 98.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,820 psi | 75% | 2651 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,789 psi | 72% | 2625 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,370 psi | 74% | 2546 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,538 psi | 62% | 2421 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,639 psi | 61% | 2444 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 46,818 psi | 72% | 2703 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 54,505 psi | 84% | 2730 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 47,950 psi | 74% | 2546 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,399 psi | 74% | 2641 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 39,015 psi | 60% | 2487 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 28,703 psi | 44% | 2339 fps | 97.7% |
| Somchem S385 | <<locked>> | 94% | 42,163 psi | 65% | 2585 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 54,404 psi | 84% | 2595 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 48,776 psi | 75% | 2536 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,773 psi | 69% | 2530 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,223 psi | 70% | 2543 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,260 psi | 57% | 2428 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 33,199 psi | 51% | 2382 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 80% | 50,589 psi | 78% | 2654 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,526 psi | 67% | 2536 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,750 psi | 50% | 2385 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 86% | 29,936 psi | 46% | 2382 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,779 psi | 50% | 2359 fps | 98% |
| Winchester 748 | <<locked>> | 80% | 50,734 psi | 78% | 2700 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 38,827 psi | 60% | 2543 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,760 psi | 43% | 2385 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,485 psi | 72% | 2631 fps | 99.9% |
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 | 180gr | Speer RN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,930 fps; across all powders the maximum-charge window runs from 1,683 fps to 2,930 fps. Accurate 3100 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 55–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:16.0 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. ReloadSwiss RS 60, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for .300 Rem. SA Ultra Mag. with the .308 | 180gr | Speer RN 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.