Load Specifications
Bullet Manufacturer:MRR
Bullet Weight:176 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:1:10.5
Load data in caliber .300 Rem. SA Ultra Mag. with .308 | 176gr | MRR Green Long Range 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 ReloadSwiss RS 52.
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% | 55,390 psi | 85% | 2651 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 57,159 psi | 88% | 2720 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 56,797 psi | 87% | 2713 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,463 psi | 85% | 2736 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 57,087 psi | 88% | 2723 fps | 97.3% |
| Accurate 4064 | <<locked>> | 94% | 56,637 psi | 87% | 2759 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,649 psi | 81% | 2785 fps | 99.4% |
| Accurate LT-30 | <<locked>> | 82% | 57,711 psi | 89% | 2635 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 58,204 psi | 90% | 2664 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 58,073 psi | 89% | 2799 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 55,593 psi | 86% | 2749 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,000 psi | 88% | 2749 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 57,798 psi | 89% | 2723 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,288 psi | 85% | 2802 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 57,885 psi | 89% | 2920 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 58,784 psi | 90% | 2815 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 58,581 psi | 90% | 2697 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,854 psi | 86% | 2789 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,430 psi | 79% | 2799 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,927 psi | 86% | 2887 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,143 psi | 56% | 2533 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,147 psi | 62% | 2677 fps | 96.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 57,203 psi | 88% | 2638 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 57,899 psi | 89% | 2815 fps | 99.8% |
| Bofors RP3 | <<locked>> | 94% | 55,564 psi | 85% | 2782 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 56,130 psi | 86% | 2753 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,651 psi | 86% | 2690 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,362 psi | 87% | 2782 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 58,711 psi | 90% | 2881 fps | 100% |
| Hodgdon H322 | <<locked>> | 84% | 57,914 psi | 89% | 2743 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,245 psi | 85% | 2720 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 56,971 psi | 88% | 2795 fps | 99.5% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 56,173 psi | 86% | 2841 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 98% | 57,217 psi | 88% | 2805 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 90% | 58,697 psi | 90% | 2808 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,398 psi | 73% | 2677 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 57,928 psi | 89% | 2841 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 57,566 psi | 89% | 2884 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,056 psi | 54% | 1650 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,391 psi | 87% | 2762 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 58,320 psi | 90% | 2782 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 58,639 psi | 90% | 2779 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,347 psi | 85% | 2713 fps | 97.8% |
| IMR 4198 | <<locked>> | 84% | 58,494 psi | 90% | 2651 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,649 psi | 81% | 2723 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 98% | 58,088 psi | 89% | 2782 fps | 98.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,140 psi | 77% | 2733 fps | 99.2% |
| IMR 4895 | <<locked>> | 92% | 57,276 psi | 88% | 2818 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 57,000 psi | 88% | 2749 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 57,159 psi | 88% | 2736 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 57,537 psi | 89% | 2772 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 57,783 psi | 89% | 2726 fps | 100% |
| Lovex S062 | <<locked>> | 94% | 58,030 psi | 89% | 2772 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 57,072 psi | 88% | 2776 fps | 99% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,331 psi | 84% | 2756 fps | 97.9% |
| Norma 201 | <<locked>> | 90% | 56,608 psi | 87% | 2743 fps | 100% |
| Norma 202 | <<locked>> | 90% | 57,043 psi | 88% | 2743 fps | 100% |
| Norma 203B | <<locked>> | 94% | 58,523 psi | 90% | 2825 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 52,112 psi | 80% | 2779 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 92% | 55,695 psi | 86% | 2802 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,155 psi | 79% | 2776 fps | 98% |
| Ramshot TAC | <<locked>> | 88% | 57,493 psi | 88% | 2772 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 88% | 56,884 psi | 88% | 2789 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 86% | 58,305 psi | 90% | 2756 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,505 psi | 55% | 1693 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,695 psi | 87% | 2733 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 57,493 psi | 88% | 2782 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 56,304 psi | 87% | 2854 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,709 psi | 86% | 2887 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,663 psi | 81% | 2815 fps | 99.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,692 psi | 81% | 2838 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 88% | 57,130 psi | 88% | 2720 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 56,797 psi | 87% | 2736 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,419 psi | 85% | 2772 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 56,130 psi | 86% | 2753 fps | 97.4% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 57,072 psi | 88% | 2776 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 90% | 57,537 psi | 89% | 2772 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 58,030 psi | 89% | 2772 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,331 psi | 84% | 2756 fps | 97.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,449 psi | 87% | 2707 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 57,363 psi | 88% | 2835 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,115 psi | 86% | 2674 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,869 psi | 86% | 2749 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,347 psi | 87% | 2769 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 58,537 psi | 90% | 2684 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 58,479 psi | 90% | 2677 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 58,001 psi | 89% | 2733 fps | 98.1% |
| Somchem S321 | <<locked>> | 86% | 58,523 psi | 90% | 2785 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 57,653 psi | 89% | 2680 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,303 psi | 85% | 2740 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 55,854 psi | 86% | 2769 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,470 psi | 71% | 2730 fps | 100% |
| Vihtavuori N130 | <<locked>> | 86% | 58,030 psi | 89% | 2644 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 58,653 psi | 90% | 2664 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,681 psi | 87% | 2703 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 57,609 psi | 89% | 2720 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 57,580 psi | 89% | 2749 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,795 psi | 84% | 2776 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 88% | 57,841 psi | 89% | 2753 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,680 psi | 86% | 2720 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,838 psi | 83% | 2782 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,943 psi | 60% | 2602 fps | 97.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,782 psi | 86% | 2762 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 57,653 psi | 89% | 2799 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 56,449 psi | 87% | 2848 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,198 psi | 50% | 2513 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 90% | 56,173 psi | 86% | 2779 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% | 45,745 psi | 70% | 2516 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,111 psi | 77% | 2625 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,927 psi | 58% | 2438 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,266 psi | 70% | 2589 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 46,659 psi | 72% | 2562 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 35,897 psi | 55% | 2428 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 34,389 psi | 53% | 2457 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 54,273 psi | 83% | 2592 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 54,694 psi | 84% | 2618 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 42,206 psi | 65% | 2546 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 35,969 psi | 55% | 2402 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,309 psi | 68% | 2556 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 44,208 psi | 68% | 2543 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,808 psi | 80% | 2753 fps | 100% |
| Alliant Power Pro 2000-MR | 48.3 gr | 80% | 38,043 psi | 59% | 2562 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,099 psi | 54% | 2415 fps | 98% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,605 psi | 79% | 2605 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,913 psi | 58% | 2480 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,157 psi | 54% | 2474 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 30,269 psi | 47% | 2375 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,037 psi | 46% | 2372 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,405 psi | 58% | 2615 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,417 psi | 82% | 2589 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,220 psi | 63% | 2546 fps | 97.7% |
| Bofors RP3 | <<locked>> | 80% | 34,548 psi | 53% | 2418 fps | 98% |
| Bofors RP7 | <<locked>> | 92% | 46,253 psi | 71% | 2595 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,195 psi | 71% | 2546 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,670 psi | 66% | 2569 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,384 psi | 73% | 2710 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 80% | 50,662 psi | 78% | 2644 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,648 psi | 79% | 2674 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 35,636 psi | 55% | 2421 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 92% | 43,062 psi | 66% | 2625 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 94% | 50,270 psi | 77% | 2700 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 42,554 psi | 65% | 2556 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,124 psi | 46% | 2323 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,421 psi | 59% | 2526 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 94% | 46,180 psi | 71% | 2700 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,063 psi | 40% | 1476 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,828 psi | 63% | 2510 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 42,134 psi | 65% | 2552 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,739 psi | 58% | 2434 fps | 97.5% |
| IMR 4166 Enduron | <<locked>> | 82% | 42,917 psi | 66% | 2507 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 52,127 psi | 80% | 2569 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 46,528 psi | 72% | 2625 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,600 psi | 70% | 2585 fps | 95.7% |
| IMR 4831 | <<locked>> | 88% | 33,518 psi | 52% | 2418 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 38,841 psi | 60% | 2510 fps | 98.2% |
| IMR 8208 XBR | <<locked>> | 80% | 44,309 psi | 68% | 2556 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 49,850 psi | 77% | 2635 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,973 psi | 63% | 2523 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,656 psi | 66% | 2490 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 37,449 psi | 58% | 2438 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 39,189 psi | 60% | 2474 fps | 95.6% |
| Lovex S070 | <<locked>> | 92% | 42,163 psi | 65% | 2549 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 41,147 psi | 63% | 2497 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 41,394 psi | 64% | 2507 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,318 psi | 57% | 2467 fps | 97.8% |
| Norma URP | <<locked>> | 88% | 35,128 psi | 54% | 2464 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 36,651 psi | 56% | 2477 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 39,276 psi | 60% | 2556 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 44,092 psi | 68% | 2556 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,540 psi | 67% | 2579 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,761 psi | 73% | 2602 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,324 psi | 40% | 1509 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,792 psi | 77% | 2635 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,379 psi | 64% | 2516 fps | 95.4% |
| ReloadSwiss RS 52 | 46.9 gr | 80% | 39,697 psi | 61% | 2579 fps | 97.9% |
| ReloadSwiss RS 60 | 47.6 gr | 80% | 32,285 psi | 50% | 2444 fps | 98.9% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,432 psi | 53% | 2477 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,434 psi | 58% | 2543 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 44,889 psi | 69% | 2539 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,247 psi | 60% | 2454 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 32,460 psi | 50% | 2362 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 92% | 46,253 psi | 71% | 2595 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,189 psi | 60% | 2474 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,973 psi | 63% | 2523 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,449 psi | 58% | 2438 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 42,163 psi | 65% | 2549 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,446 psi | 81% | 2651 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,692 psi | 52% | 2415 fps | 96.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,649 psi | 81% | 2628 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,235 psi | 65% | 2530 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,770 psi | 63% | 2516 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,743 psi | 66% | 2457 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,346 psi | 54% | 2329 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 44,266 psi | 68% | 2526 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 47,645 psi | 73% | 2628 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,279 psi | 65% | 2461 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,945 psi | 65% | 2526 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 33,489 psi | 52% | 2372 fps | 97.2% |
| Somchem S365 | <<locked>> | 82% | 25,701 psi | 40% | 2251 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 48,414 psi | 74% | 2516 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,047 psi | 66% | 2454 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,493 psi | 59% | 2438 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,305 psi | 60% | 2448 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,821 psi | 49% | 2313 fps | 98% |
| Vihtavuori N160 | <<locked>> | 86% | 34,476 psi | 53% | 2415 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 44,338 psi | 68% | 2552 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 37,797 psi | 58% | 2438 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 36,071 psi | 55% | 2467 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 94% | 31,966 psi | 49% | 2444 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,342 psi | 47% | 2293 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 43,743 psi | 67% | 2592 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 43,062 psi | 66% | 2625 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,110 psi | 46% | 2444 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,161 psi | 62% | 2520 fps | 98.9% |
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 107 powders for .300 Rem. SA Ultra Mag. loaded with the .308 | 176gr | MRR Green Long Range. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,920 fps; across all powders the maximum-charge window runs from 1,650 fps to 2,920 fps. Accurate 4350 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 176.0 gr projectile in 0.308" calls for a 1:10.5 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, ReloadSwiss RS 52 rank at the top here: for .300 Rem. SA Ultra Mag. with the .308 | 176gr | MRR Green Long Range 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.