Load Specifications
Bullet:.308 | 180gr | Barnes X S
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:1:12.0
Load data in caliber .300 Rem. SA Ultra Mag. with .308 | 180gr | Barnes X S bullet and 102 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Hodgdon H414.
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% | 56,014 psi | 86% | 2608 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,941 psi | 86% | 2644 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 56,043 psi | 86% | 2694 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,565 psi | 87% | 2680 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,281 psi | 70% | 2605 fps | 97.3% |
| Accurate 4064 | <<locked>> | 88% | 55,622 psi | 86% | 2690 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 58,247 psi | 90% | 2822 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 57,928 psi | 89% | 2756 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 58,479 psi | 90% | 2749 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,025 psi | 80% | 2733 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,608 psi | 87% | 2703 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 57,928 psi | 89% | 2674 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 57,261 psi | 88% | 2874 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 51,692 psi | 80% | 2730 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,550 psi | 85% | 2730 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 56,072 psi | 86% | 2749 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 58,102 psi | 89% | 2861 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 55,956 psi | 86% | 2848 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,010 psi | 78% | 2723 fps | 95.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,815 psi | 66% | 2631 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,645 psi | 73% | 2789 fps | 99.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 57,421 psi | 88% | 2769 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 56,811 psi | 87% | 2753 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,188 psi | 86% | 2717 fps | 97.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 58,204 psi | 90% | 2684 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,391 psi | 87% | 2736 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 57,928 psi | 89% | 2828 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 57,116 psi | 88% | 2759 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 96% | 56,594 psi | 87% | 2812 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 94% | 56,782 psi | 87% | 2766 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 86% | 58,537 psi | 90% | 2766 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,636 psi | 84% | 2743 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 57,682 psi | 89% | 2795 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 56,869 psi | 87% | 2844 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,274 psi | 56% | 1654 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,782 psi | 86% | 2713 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 58,726 psi | 90% | 2743 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 58,247 psi | 90% | 2736 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 57,798 psi | 89% | 2717 fps | 98.5% |
| IMR 4350 | <<locked>> | 98% | 56,231 psi | 87% | 2743 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 94% | 57,667 psi | 89% | 2743 fps | 98.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 58,218 psi | 90% | 2805 fps | 99.9% |
| IMR 4895 | <<locked>> | 88% | 57,450 psi | 88% | 2779 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 56,608 psi | 87% | 2703 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 58,276 psi | 90% | 2733 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,884 psi | 88% | 2680 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 58,581 psi | 90% | 2736 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 57,653 psi | 89% | 2743 fps | 99.3% |
| Lovex S070 | <<locked>> | 98% | 58,436 psi | 90% | 2776 fps | 98.8% |
| Norma 201 | <<locked>> | 86% | 57,130 psi | 88% | 2707 fps | 100% |
| Norma 202 | <<locked>> | 86% | 57,101 psi | 88% | 2700 fps | 100% |
| Norma 203B | <<locked>> | 90% | 58,784 psi | 90% | 2785 fps | 100% |
| Norma 204 | <<locked>> | 98% | 56,594 psi | 87% | 2785 fps | 96.7% |
| Norma MRPᴾ | <<locked>> | 100% | 47,485 psi | 73% | 2746 fps | 96.7% |
| Norma URP | <<locked>> | 98% | 56,289 psi | 87% | 2799 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 88% | 55,622 psi | 86% | 2762 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 58,407 psi | 90% | 2848 fps | 99.3% |
| Ramshot TAC | <<locked>> | 84% | 56,652 psi | 87% | 2723 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 84% | 56,666 psi | 87% | 2746 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 57,493 psi | 88% | 2707 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,695 psi | 56% | 1690 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 57,130 psi | 88% | 2740 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 56,536 psi | 87% | 2815 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 55,738 psi | 86% | 2844 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 57,217 psi | 88% | 2838 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 56,347 psi | 87% | 2861 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 84% | 58,334 psi | 90% | 2684 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 57,580 psi | 89% | 2703 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,608 psi | 87% | 2743 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 49,966 psi | 77% | 2710 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 94% | 56,188 psi | 86% | 2717 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 96% | 57,653 psi | 89% | 2743 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 58,276 psi | 90% | 2733 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 58,581 psi | 90% | 2736 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 58,436 psi | 90% | 2776 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 57,508 psi | 88% | 2795 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,796 psi | 86% | 2710 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,043 psi | 86% | 2726 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 57,812 psi | 89% | 2635 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 57,856 psi | 89% | 2631 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 57,812 psi | 89% | 2697 fps | 98.4% |
| Somchem S321 | <<locked>> | 82% | 58,146 psi | 89% | 2736 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 57,609 psi | 89% | 2638 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 58,595 psi | 90% | 2746 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 56,637 psi | 87% | 2736 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,447 psi | 84% | 2802 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,039 psi | 79% | 2697 fps | 96.9% |
| Vihtavuori N130 | <<locked>> | 82% | 57,566 psi | 89% | 2592 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 57,943 psi | 89% | 2615 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 57,101 psi | 88% | 2661 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,696 psi | 89% | 2677 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 57,667 psi | 89% | 2710 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,303 psi | 85% | 2746 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 84% | 57,072 psi | 88% | 2700 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,666 psi | 86% | 2677 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 57,943 psi | 89% | 2802 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,282 psi | 73% | 2707 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 58,798 psi | 90% | 2769 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 57,246 psi | 88% | 2749 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 56,594 psi | 87% | 2812 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,624 psi | 59% | 2654 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 86% | 56,086 psi | 86% | 2736 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% | 52,634 psi | 81% | 2566 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,847 psi | 72% | 2520 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,649 psi | 81% | 2648 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 46,934 psi | 72% | 2530 fps | 95.7% |
| Accurate 3100 | <<locked>> | 94% | 37,521 psi | 58% | 2457 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 44,208 psi | 68% | 2520 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,880 psi | 51% | 2365 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 48,515 psi | 75% | 2612 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,292 psi | 64% | 2470 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 98% | 49,095 psi | 76% | 2684 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,386 psi | 78% | 2612 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,140 psi | 79% | 2589 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,092 psi | 68% | 2651 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 48,863 psi | 75% | 2684 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,437 psi | 64% | 2497 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,309 psi | 68% | 2559 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,460 psi | 50% | 2362 fps | 95.2% |
| Alliant Reloder-17 | 48.9 gr | 80% | 35,882 psi | 55% | 2477 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,254 psi | 74% | 2677 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,848 psi | 44% | 2293 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,476 psi | 53% | 2500 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,398 psi | 73% | 2615 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 41,684 psi | 64% | 2510 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 44,396 psi | 68% | 2520 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,909 psi | 80% | 2595 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,617 psi | 76% | 2638 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 54,389 psi | 84% | 2779 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 42,105 psi | 65% | 2510 fps | 97.7% |
| Hodgdon H414 | 51.5 gr | 86% | 41,408 psi | 64% | 2552 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 88% | 47,572 psi | 73% | 2618 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 48,936 psi | 75% | 2621 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,153 psi | 46% | 2274 fps | 96.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,744 psi | 69% | 2598 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 43,482 psi | 67% | 2615 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,079 psi | 42% | 1473 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,586 psi | 72% | 2569 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 48,863 psi | 75% | 2608 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,395 psi | 67% | 2500 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,571 psi | 70% | 2516 fps | 96.2% |
| IMR 4350 | <<locked>> | 90% | 44,295 psi | 68% | 2546 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,076 psi | 66% | 2500 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 31,734 psi | 49% | 2323 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 45,324 psi | 70% | 2585 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 50,386 psi | 78% | 2612 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,327 psi | 74% | 2595 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,935 psi | 74% | 2543 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 43,830 psi | 67% | 2510 fps | 99.8% |
| Lovex S065 | <<locked>> | 80% | 36,550 psi | 56% | 2369 fps | 95.1% |
| Lovex S070 | <<locked>> | 86% | 41,249 psi | 63% | 2487 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 48,051 psi | 74% | 2569 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,892 psi | 74% | 2569 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,700 psi | 67% | 2549 fps | 99.3% |
| Norma 204 | <<locked>> | 94% | 49,893 psi | 77% | 2680 fps | 95.3% |
| Norma MRP | <<locked>> | 98% | 44,411 psi | 68% | 2684 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 32,764 psi | 50% | 2359 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 42,960 psi | 66% | 2559 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 38,130 psi | 59% | 2490 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 50,111 psi | 77% | 2621 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,922 psi | 77% | 2644 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 53,911 psi | 83% | 2657 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,528 psi | 42% | 1509 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,047 psi | 65% | 2487 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,630 psi | 72% | 2657 fps | 99.4% |
| ReloadSwiss RS 60 | 48.9 gr | 80% | 38,014 psi | 58% | 2536 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,214 psi | 53% | 2425 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 36,158 psi | 56% | 2474 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 52,214 psi | 80% | 2598 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,803 psi | 70% | 2523 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 39,450 psi | 61% | 2461 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 98% | 46,862 psi | 72% | 2657 fps | 95% |
| Rottweil R 907 | <<locked>> | 86% | 44,396 psi | 68% | 2520 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,550 psi | 56% | 2369 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,327 psi | 74% | 2595 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,830 psi | 67% | 2510 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 41,249 psi | 63% | 2487 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,624 psi | 61% | 2500 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,066 psi | 75% | 2605 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,760 psi | 72% | 2582 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,559 psi | 75% | 2507 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,843 psi | 63% | 2385 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,743 psi | 66% | 2454 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 54,491 psi | 84% | 2687 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 48,617 psi | 75% | 2513 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,341 psi | 74% | 2595 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 39,943 psi | 61% | 2461 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 29,646 psi | 46% | 2320 fps | 97.6% |
| Somchem S385 | <<locked>> | 96% | 45,034 psi | 69% | 2595 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 54,346 psi | 84% | 2552 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 48,820 psi | 75% | 2497 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,179 psi | 70% | 2497 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,527 psi | 70% | 2507 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,985 psi | 58% | 2398 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 33,968 psi | 52% | 2356 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 50,604 psi | 78% | 2608 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,961 psi | 68% | 2500 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,634 psi | 52% | 2362 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 86% | 31,038 psi | 48% | 2365 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,417 psi | 51% | 2329 fps | 97.7% |
| Winchester 748 | <<locked>> | 80% | 50,227 psi | 77% | 2651 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,408 psi | 64% | 2552 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,834 psi | 44% | 2365 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,398 psi | 71% | 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 102 powders for .300 Rem. SA Ultra Mag. loaded with the .308 | 180gr | Barnes X S. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,874 fps; across all powders the maximum-charge window runs from 1,654 fps to 2,874 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:12.0 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 Reloder-17, ReloadSwiss RS 60, Hodgdon H414 rank at the top here: for .300 Rem. SA Ultra Mag. with the .308 | 180gr | Barnes X S 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.