Load Specifications
Bullet:.308 | 180gr | Barnes MRX BT
Bullet Manufacturer:Barnes
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:1:11.5
Load data in caliber .300 Rem. SA Ultra Mag. with .308 | 180gr | Barnes MRX BT bullet and 106 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, Alliant Reloder-17 and ReloadSwiss RS 60.
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% | 57,551 psi | 89% | 2654 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,767 psi | 86% | 2684 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,796 psi | 86% | 2677 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 58,247 psi | 90% | 2749 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,651 psi | 86% | 2690 fps | 97.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 39,378 psi | 61% | 2526 fps | 95.8% |
| Accurate 4064 | <<locked>> | 92% | 55,709 psi | 86% | 2723 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,811 psi | 86% | 2812 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 88% | 56,637 psi | 87% | 2759 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 57,754 psi | 89% | 2759 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,912 psi | 86% | 2713 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 56,536 psi | 87% | 2680 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 57,667 psi | 89% | 2815 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 56,608 psi | 87% | 2881 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 57,595 psi | 89% | 2779 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,971 psi | 88% | 2654 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 58,479 psi | 90% | 2805 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,737 psi | 83% | 2818 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 58,784 psi | 90% | 2904 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,174 psi | 59% | 2562 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,496 psi | 65% | 2713 fps | 98.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 56,623 psi | 87% | 2779 fps | 99.9% |
| Bofors RP3 | <<locked>> | 94% | 58,291 psi | 90% | 2795 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 58,436 psi | 90% | 2772 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 86% | 57,522 psi | 88% | 2694 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,940 psi | 85% | 2740 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 57,319 psi | 88% | 2844 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 56,536 psi | 87% | 2703 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 57,566 psi | 89% | 2730 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,666 psi | 86% | 2759 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 98% | 55,129 psi | 85% | 2812 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 96% | 56,130 psi | 86% | 2776 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 88% | 57,203 psi | 88% | 2769 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,806 psi | 77% | 2694 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 56,739 psi | 87% | 2802 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 56,347 psi | 87% | 2854 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,288 psi | 54% | 1647 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 58,653 psi | 90% | 2772 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 57,348 psi | 88% | 2749 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 57,334 psi | 88% | 2746 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 57,377 psi | 88% | 2730 fps | 98.4% |
| IMR 4198 | <<locked>> | 82% | 57,203 psi | 88% | 2615 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,129 psi | 85% | 2746 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 96% | 56,898 psi | 88% | 2753 fps | 98.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,620 psi | 81% | 2753 fps | 99.7% |
| IMR 4895 | <<locked>> | 90% | 56,188 psi | 86% | 2785 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 55,912 psi | 86% | 2713 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,709 psi | 86% | 2694 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 56,420 psi | 87% | 2736 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 56,231 psi | 87% | 2690 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 56,884 psi | 88% | 2736 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,970 psi | 86% | 2743 fps | 99.2% |
| Lovex S070ᴾ | <<locked>> | 100% | 56,971 psi | 88% | 2779 fps | 98.6% |
| Norma 201 | <<locked>> | 88% | 55,216 psi | 85% | 2703 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,970 psi | 86% | 2707 fps | 100% |
| Norma 203B | <<locked>> | 92% | 57,638 psi | 89% | 2792 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 55,869 psi | 86% | 2795 fps | 96.6% |
| Norma URPᴾ | <<locked>> | 100% | 54,984 psi | 85% | 2802 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 92% | 58,595 psi | 90% | 2822 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 53,737 psi | 83% | 2799 fps | 98.8% |
| Ramshot TAC | <<locked>> | 86% | 56,173 psi | 86% | 2736 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,695 psi | 86% | 2753 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 56,739 psi | 87% | 2717 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,752 psi | 55% | 1686 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,317 psi | 85% | 2694 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 56,101 psi | 86% | 2746 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,274 psi | 85% | 2822 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 58,610 psi | 90% | 2904 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 55,593 psi | 86% | 2838 fps | 99.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,405 psi | 85% | 2867 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 86% | 56,173 psi | 86% | 2684 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,666 psi | 86% | 2703 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 58,146 psi | 89% | 2789 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 58,436 psi | 90% | 2772 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,970 psi | 86% | 2743 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 56,420 psi | 87% | 2736 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 56,884 psi | 88% | 2736 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 56,971 psi | 88% | 2779 fps | 98.6% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 58,711 psi | 90% | 2717 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 56,478 psi | 87% | 2802 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 58,146 psi | 89% | 2677 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 58,378 psi | 90% | 2769 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 58,798 psi | 90% | 2785 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 57,217 psi | 88% | 2648 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 57,406 psi | 88% | 2644 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 56,623 psi | 87% | 2700 fps | 98.3% |
| Somchem S321 | <<locked>> | 84% | 57,000 psi | 88% | 2746 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 56,173 psi | 86% | 2641 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 57,783 psi | 89% | 2756 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 58,465 psi | 90% | 2785 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,211 psi | 76% | 2749 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 56,608 psi | 87% | 2605 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 57,493 psi | 88% | 2631 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,709 psi | 86% | 2667 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 56,478 psi | 87% | 2684 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 56,507 psi | 87% | 2717 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 57,682 psi | 89% | 2799 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 86% | 56,318 psi | 87% | 2713 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 58,131 psi | 89% | 2730 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 56,594 psi | 87% | 2805 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,568 psi | 64% | 2631 fps | 98.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 58,465 psi | 90% | 2782 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 56,275 psi | 87% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 55,448 psi | 85% | 2815 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,866 psi | 52% | 2556 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 90% | 58,726 psi | 90% | 2792 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% | 47,819 psi | 74% | 2526 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,199 psi | 80% | 2635 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,987 psi | 62% | 2451 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,311 psi | 73% | 2598 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 45,455 psi | 70% | 2530 fps | 95.3% |
| Accurate 3100 | <<locked>> | 98% | 36,854 psi | 57% | 2477 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 37,869 psi | 58% | 2448 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 31,676 psi | 49% | 2375 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 44,063 psi | 68% | 2562 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 80% | 37,391 psi | 58% | 2415 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,166 psi | 71% | 2569 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 46,514 psi | 72% | 2552 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 54,172 psi | 83% | 2766 fps | 100% |
| Alliant Power Pro 2000-MR | 49.6 gr | 80% | 39,943 psi | 61% | 2592 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,854 psi | 57% | 2438 fps | 98.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 53,563 psi | 82% | 2612 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,711 psi | 61% | 2500 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 84% | 32,430 psi | 50% | 2392 fps | 95.3% |
| Alliant Reloder-17 | 48.9 gr | 80% | 31,821 psi | 49% | 2405 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 92% | 29,617 psi | 46% | 2349 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 34,200 psi | 53% | 2523 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,192 psi | 66% | 2566 fps | 98.5% |
| Bofors RP3 | <<locked>> | 80% | 36,347 psi | 56% | 2438 fps | 98.8% |
| Bofors RP7 | <<locked>> | 90% | 45,339 psi | 70% | 2566 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,964 psi | 74% | 2559 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,773 psi | 69% | 2589 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,792 psi | 77% | 2733 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 80% | 52,837 psi | 81% | 2654 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 53,940 psi | 83% | 2684 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,289 psi | 57% | 2444 fps | 96.4% |
| Hodgdon H414 | <<locked>> | 90% | 42,322 psi | 65% | 2595 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 90% | 46,340 psi | 71% | 2618 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 44,440 psi | 68% | 2572 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 27,818 psi | 43% | 2244 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,509 psi | 62% | 2546 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 92% | 45,252 psi | 70% | 2671 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,252 psi | 40% | 1470 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,612 psi | 66% | 2523 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 44,063 psi | 68% | 2562 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,218 psi | 60% | 2448 fps | 98.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,698 psi | 64% | 2467 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 54,056 psi | 83% | 2575 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 45,571 psi | 70% | 2592 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 41,872 psi | 64% | 2500 fps | 95.1% |
| IMR 4831 | <<locked>> | 86% | 33,011 psi | 51% | 2388 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 40,698 psi | 63% | 2530 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 80% | 46,166 psi | 71% | 2569 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 52,141 psi | 80% | 2648 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,960 psi | 66% | 2539 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,092 psi | 68% | 2500 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 38,972 psi | 60% | 2451 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 36,143 psi | 56% | 2392 fps | 95% |
| Lovex S070 | <<locked>> | 90% | 41,423 psi | 64% | 2520 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 43,018 psi | 66% | 2513 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 43,294 psi | 67% | 2520 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,059 psi | 60% | 2487 fps | 98.6% |
| Norma 204 | <<locked>> | 96% | 48,733 psi | 75% | 2680 fps | 95% |
| Norma URP | <<locked>> | 84% | 32,401 psi | 50% | 2382 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 38,566 psi | 59% | 2500 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 38,580 psi | 59% | 2526 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 45,934 psi | 71% | 2575 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,585 psi | 70% | 2595 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,719 psi | 76% | 2615 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,542 psi | 41% | 1506 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,779 psi | 80% | 2644 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 40,509 psi | 62% | 2484 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,814 psi | 64% | 2598 fps | 98.7% |
| ReloadSwiss RS 60 | 48.9 gr | 80% | 33,939 psi | 52% | 2470 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 33,997 psi | 52% | 2451 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 36,724 psi | 56% | 2513 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 46,615 psi | 72% | 2546 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,785 psi | 63% | 2467 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 34,185 psi | 53% | 2385 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 45,339 psi | 70% | 2566 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,143 psi | 56% | 2392 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,960 psi | 66% | 2539 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,972 psi | 60% | 2451 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 90% | 41,423 psi | 64% | 2520 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 54,665 psi | 84% | 2664 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,302 psi | 54% | 2434 fps | 97.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 54,621 psi | 84% | 2635 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,208 psi | 68% | 2549 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,511 psi | 65% | 2530 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,353 psi | 68% | 2467 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,796 psi | 57% | 2339 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 43,323 psi | 67% | 2493 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 49,806 psi | 77% | 2644 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,063 psi | 68% | 2470 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,947 psi | 68% | 2546 fps | 99.3% |
| Somchem S355 | <<locked>> | 80% | 35,143 psi | 54% | 2392 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 25,237 psi | 39% | 2221 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 50,140 psi | 77% | 2520 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,744 psi | 69% | 2457 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,263 psi | 62% | 2448 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,104 psi | 63% | 2461 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,417 psi | 51% | 2333 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 33,866 psi | 52% | 2385 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 46,209 psi | 71% | 2566 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 39,465 psi | 61% | 2451 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,315 psi | 51% | 2388 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 90% | 29,747 psi | 46% | 2369 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,544 psi | 45% | 2260 fps | 96.2% |
| Winchester 748 | <<locked>> | 80% | 45,977 psi | 71% | 2608 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 42,322 psi | 65% | 2595 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 94% | 27,818 psi | 43% | 2365 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,945 psi | 65% | 2536 fps | 99.4% |
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 106 powders for .300 Rem. SA Ultra Mag. loaded with the .308 | 180gr | Barnes MRX BT. Alliant Reloder-17 delivers the highest muzzle velocity at 2,904 fps; across all powders the maximum-charge window runs from 1,647 fps to 2,904 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .300 Rem. SA Ultra Mag. with the .308 | 180gr | Barnes MRX BT 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.