Load Specifications
Bullet:.308 | 165gr | Geco STAR
Bullet Manufacturer:Geco
Bullet Weight:165 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:1:13.0
Load data in caliber .300 Rem. SA Ultra Mag. with .308 | 165gr | Geco STAR 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 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>> | 86% | 55,883 psi | 86% | 2766 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 57,754 psi | 89% | 2838 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 57,261 psi | 88% | 2828 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,159 psi | 86% | 2854 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 57,725 psi | 89% | 2841 fps | 97.1% |
| Accurate 4064 | <<locked>> | 94% | 57,232 psi | 88% | 2877 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,708 psi | 83% | 2910 fps | 99.4% |
| Accurate LT-30 | <<locked>> | 82% | 58,247 psi | 90% | 2753 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 58,682 psi | 90% | 2782 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 58,479 psi | 90% | 2917 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 56,144 psi | 86% | 2864 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,580 psi | 89% | 2867 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 58,421 psi | 90% | 2841 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,898 psi | 86% | 2923 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 58,798 psi | 90% | 3045 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,782 psi | 86% | 2887 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 58,813 psi | 90% | 2812 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,391 psi | 87% | 2907 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,953 psi | 80% | 2913 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,971 psi | 88% | 3012 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,767 psi | 57% | 2641 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,814 psi | 63% | 2785 fps | 96.7% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 57,682 psi | 89% | 2753 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,013 psi | 85% | 2884 fps | 99.6% |
| Bofors RP3 | <<locked>> | 94% | 56,492 psi | 87% | 2904 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 56,797 psi | 87% | 2871 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,912 psi | 86% | 2802 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 57,058 psi | 88% | 2900 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,405 psi | 85% | 2946 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 58,653 psi | 90% | 2864 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,883 psi | 86% | 2838 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 57,725 psi | 89% | 2917 fps | 99.4% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 56,884 psi | 88% | 2963 fps | 98% |
| Hodgdon H4350 | <<locked>> | 98% | 57,928 psi | 89% | 2927 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 88% | 55,477 psi | 85% | 2874 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,022 psi | 74% | 2789 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 58,653 psi | 90% | 2963 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 58,349 psi | 90% | 3005 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,012 psi | 54% | 1732 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 57,145 psi | 88% | 2884 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,274 psi | 85% | 2858 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,521 psi | 85% | 2848 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,927 psi | 86% | 2831 fps | 97.6% |
| IMR 4198 | <<locked>> | 82% | 55,709 psi | 86% | 2730 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,272 psi | 82% | 2838 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,419 psi | 85% | 2851 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,850 psi | 78% | 2848 fps | 99.1% |
| IMR 4895 | <<locked>> | 92% | 57,827 psi | 89% | 2940 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 57,580 psi | 89% | 2867 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 57,885 psi | 89% | 2854 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 58,320 psi | 90% | 2890 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 58,363 psi | 90% | 2848 fps | 100% |
| Lovex S062 | <<locked>> | 94% | 58,639 psi | 90% | 2890 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 57,885 psi | 89% | 2894 fps | 99% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,071 psi | 85% | 2874 fps | 97.8% |
| Norma 201 | <<locked>> | 90% | 57,174 psi | 88% | 2861 fps | 100% |
| Norma 202 | <<locked>> | 90% | 57,580 psi | 89% | 2861 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,550 psi | 85% | 2894 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 52,910 psi | 81% | 2897 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 92% | 56,565 psi | 87% | 2923 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,764 psi | 80% | 2890 fps | 97.9% |
| Ramshot TAC | <<locked>> | 88% | 58,262 psi | 90% | 2894 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 88% | 57,798 psi | 89% | 2910 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 86% | 58,798 psi | 90% | 2874 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,404 psi | 54% | 1772 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 57,188 psi | 88% | 2851 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 58,015 psi | 89% | 2897 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 57,072 psi | 88% | 2976 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 56,652 psi | 87% | 3012 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,519 psi | 82% | 2933 fps | 99.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,577 psi | 82% | 2959 fps | 99% |
| Rottweil R 901 | <<locked>> | 88% | 57,856 psi | 89% | 2838 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 57,334 psi | 88% | 2854 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,999 psi | 86% | 2890 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 56,797 psi | 87% | 2871 fps | 97.3% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 57,885 psi | 89% | 2894 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 90% | 58,320 psi | 90% | 2890 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 58,639 psi | 90% | 2890 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,071 psi | 85% | 2874 fps | 97.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,768 psi | 87% | 2822 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 58,146 psi | 89% | 2953 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,507 psi | 87% | 2792 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,463 psi | 87% | 2867 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 57,014 psi | 88% | 2890 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,347 psi | 85% | 2753 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,666 psi | 86% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 58,595 psi | 90% | 2848 fps | 98% |
| Somchem S321 | <<locked>> | 84% | 55,390 psi | 85% | 2851 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 58,204 psi | 90% | 2799 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,144 psi | 86% | 2861 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 56,507 psi | 87% | 2887 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,152 psi | 73% | 2844 fps | 100% |
| Vihtavuori N130 | <<locked>> | 86% | 58,639 psi | 90% | 2759 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,579 psi | 86% | 2736 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 57,101 psi | 88% | 2818 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 58,262 psi | 90% | 2838 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 58,218 psi | 90% | 2867 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,767 psi | 86% | 2897 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 88% | 58,349 psi | 90% | 2871 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,289 psi | 87% | 2835 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,636 psi | 84% | 2900 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,682 psi | 61% | 2713 fps | 97.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,565 psi | 87% | 2881 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 58,189 psi | 90% | 2917 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 57,203 psi | 88% | 2966 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,561 psi | 50% | 2612 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 90% | 57,014 psi | 88% | 2900 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% | 46,166 psi | 71% | 2628 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,488 psi | 78% | 2740 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,276 psi | 59% | 2539 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,614 psi | 70% | 2697 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 50,328 psi | 77% | 2726 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 36,216 psi | 56% | 2530 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 34,896 psi | 54% | 2559 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 54,665 psi | 84% | 2707 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 55,085 psi | 85% | 2736 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 42,583 psi | 66% | 2654 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 80% | 36,245 psi | 56% | 2503 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,730 psi | 69% | 2664 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 44,614 psi | 69% | 2654 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,344 psi | 81% | 2871 fps | 99.9% |
| Alliant Power Pro 2000-MR | 51.4 gr | 80% | 38,479 psi | 59% | 2671 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,563 psi | 55% | 2520 fps | 97.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,214 psi | 80% | 2723 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,276 psi | 59% | 2585 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,549 psi | 55% | 2579 fps | 95.6% |
| Alliant Reloder-17 | 50.7 gr | 80% | 30,690 psi | 47% | 2477 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,371 psi | 47% | 2470 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,956 psi | 58% | 2720 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 54,070 psi | 83% | 2703 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,829 psi | 64% | 2654 fps | 97.6% |
| Bofors RP3 | <<locked>> | 80% | 34,896 psi | 54% | 2516 fps | 97.8% |
| Bofors RP7 | <<locked>> | 92% | 46,833 psi | 72% | 2707 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,644 psi | 72% | 2657 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,163 psi | 66% | 2680 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,051 psi | 74% | 2828 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 80% | 51,126 psi | 79% | 2762 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,156 psi | 80% | 2789 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 35,868 psi | 55% | 2520 fps | 95% |
| Hodgdon H414 | <<locked>> | 92% | 43,526 psi | 67% | 2733 fps | 95% |
| Hodgdon H4350 | <<locked>> | 94% | 50,995 psi | 78% | 2818 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 42,960 psi | 66% | 2664 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,414 psi | 47% | 2418 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,798 psi | 60% | 2631 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 94% | 46,833 psi | 72% | 2815 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,107 psi | 40% | 1549 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,234 psi | 63% | 2615 fps | 98.8% |
| IMR 3031 | <<locked>> | 80% | 42,525 psi | 65% | 2664 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,014 psi | 58% | 2536 fps | 97.2% |
| IMR 4166 Enduron | <<locked>> | 84% | 46,064 psi | 71% | 2664 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 52,475 psi | 81% | 2684 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 46,905 psi | 72% | 2730 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,948 psi | 71% | 2694 fps | 95.4% |
| IMR 4831 | <<locked>> | 88% | 34,026 psi | 52% | 2520 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 39,233 psi | 60% | 2615 fps | 98% |
| IMR 8208 XBR | <<locked>> | 80% | 44,730 psi | 69% | 2664 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 50,357 psi | 77% | 2746 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,437 psi | 64% | 2631 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 42,902 psi | 66% | 2595 fps | 98.7% |
| Lovex S062 | <<locked>> | 80% | 37,739 psi | 58% | 2539 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 39,784 psi | 61% | 2579 fps | 95.3% |
| Lovex S070 | <<locked>> | 94% | 45,440 psi | 70% | 2710 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 41,452 psi | 64% | 2605 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 41,901 psi | 64% | 2615 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,666 psi | 58% | 2572 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 35,447 psi | 55% | 2566 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 37,101 psi | 57% | 2582 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 94% | 42,511 psi | 65% | 2720 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 44,672 psi | 69% | 2667 fps | 96.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,990 psi | 68% | 2687 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,428 psi | 75% | 2713 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,339 psi | 41% | 1585 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,096 psi | 77% | 2746 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,901 psi | 64% | 2621 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,161 psi | 62% | 2684 fps | 97.7% |
| ReloadSwiss RS 60 | 50.7 gr | 80% | 32,721 psi | 50% | 2546 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 37,420 psi | 58% | 2638 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,956 psi | 58% | 2648 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 45,368 psi | 70% | 2651 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,581 psi | 61% | 2559 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 32,851 psi | 51% | 2461 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 92% | 46,833 psi | 72% | 2707 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,784 psi | 61% | 2579 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,437 psi | 64% | 2631 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 37,739 psi | 58% | 2539 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 94% | 45,440 psi | 70% | 2710 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,968 psi | 81% | 2766 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,055 psi | 52% | 2516 fps | 96.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 53,200 psi | 82% | 2749 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,656 psi | 66% | 2638 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,205 psi | 63% | 2621 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,221 psi | 66% | 2566 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,766 psi | 55% | 2431 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 44,933 psi | 69% | 2635 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 48,327 psi | 74% | 2746 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 42,525 psi | 65% | 2566 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,569 psi | 65% | 2638 fps | 98.6% |
| Somchem S355 | <<locked>> | 80% | 33,736 psi | 52% | 2470 fps | 96.9% |
| Somchem S365 | <<locked>> | 84% | 27,659 psi | 43% | 2398 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 48,921 psi | 75% | 2631 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,555 psi | 67% | 2562 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,986 psi | 60% | 2546 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,726 psi | 61% | 2552 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,198 psi | 50% | 2411 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 86% | 34,838 psi | 54% | 2516 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 44,672 psi | 69% | 2661 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 38,043 psi | 59% | 2539 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 36,622 psi | 56% | 2572 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 94% | 32,372 psi | 50% | 2543 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,661 psi | 47% | 2388 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 44,367 psi | 68% | 2707 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 43,787 psi | 67% | 2736 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,560 psi | 47% | 2546 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,451 psi | 62% | 2625 fps | 98.7% |
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 119 powders for .300 Rem. SA Ultra Mag. loaded with the .308 | 165gr | Geco STAR. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,045 fps; across all powders the maximum-charge window runs from 1,732 fps to 3,045 fps. Accurate 3100 gives the best case fill at 100 %, and 119 of the 119 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 165.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, ADI AR 2209 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, Alliant Reloder-17 rank at the top here: for .300 Rem. SA Ultra Mag. with the .308 | 165gr | Geco STAR they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.