Load Specifications
Bullet:.308 | 170gr | Geco PLUS
Bullet Manufacturer:Geco
Bullet Weight:170 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:1:15.5
Load data in caliber .300 Rem. SA Ultra Mag. with .308 | 170gr | Geco PLUS bullet and 100 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, Hodgdon Superformance 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.
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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>> | 84% | 56,608 psi | 87% | 2740 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,535 psi | 85% | 2766 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 57,406 psi | 88% | 2835 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 58,392 psi | 90% | 2828 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,728 psi | 66% | 2671 fps | 96.6% |
| Accurate 4064 | <<locked>> | 90% | 55,782 psi | 86% | 2818 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,579 psi | 86% | 2904 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 86% | 55,912 psi | 86% | 2848 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 56,971 psi | 88% | 2848 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 58,305 psi | 90% | 2848 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,811 psi | 86% | 2769 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,506 psi | 85% | 2969 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,985 psi | 88% | 2871 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 57,609 psi | 89% | 2894 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,507 psi | 87% | 2956 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 58,160 psi | 89% | 2995 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,625 psi | 63% | 2700 fps | 99.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,629 psi | 70% | 2864 fps | 98.7% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,709 psi | 86% | 2864 fps | 99.8% |
| Bofors RP3 | <<locked>> | 92% | 57,928 psi | 89% | 2887 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 57,522 psi | 88% | 2858 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,333 psi | 87% | 2776 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 57,957 psi | 89% | 2877 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 56,202 psi | 86% | 2927 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 58,726 psi | 90% | 2904 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 98% | 58,378 psi | 90% | 2953 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 94% | 55,172 psi | 85% | 2861 fps | 97% |
| Hodgdon H4895 | <<locked>> | 86% | 56,463 psi | 87% | 2858 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,823 psi | 81% | 2831 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,014 psi | 86% | 2890 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,303 psi | 85% | 2936 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,621 psi | 55% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 57,725 psi | 89% | 2861 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 56,637 psi | 87% | 2838 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 56,217 psi | 86% | 2828 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,260 psi | 87% | 2812 fps | 98.2% |
| IMR 4350ᴾ | <<locked>> | 100% | 57,914 psi | 89% | 2884 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,043 psi | 86% | 2838 fps | 98.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,159 psi | 86% | 2897 fps | 99.8% |
| IMR 4895 | <<locked>> | 88% | 55,376 psi | 85% | 2867 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 58,305 psi | 90% | 2848 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 58,726 psi | 90% | 2831 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,709 psi | 86% | 2822 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 58,537 psi | 90% | 2822 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 56,362 psi | 87% | 2828 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,608 psi | 86% | 2831 fps | 99.1% |
| Lovex S070 | <<locked>> | 98% | 56,318 psi | 87% | 2864 fps | 98.5% |
| Norma 201 | <<locked>> | 88% | 57,928 psi | 89% | 2838 fps | 100% |
| Norma 202 | <<locked>> | 88% | 58,537 psi | 90% | 2838 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,768 psi | 87% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 98% | 55,085 psi | 85% | 2881 fps | 96.4% |
| Norma MRPᴾ | <<locked>> | 100% | 45,455 psi | 70% | 2818 fps | 96% |
| Norma URPᴾ | <<locked>> | 100% | 58,189 psi | 90% | 2943 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 90% | 57,580 psi | 89% | 2907 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,884 psi | 88% | 2940 fps | 99.1% |
| Ramshot TAC | <<locked>> | 86% | 58,682 psi | 90% | 2871 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 58,465 psi | 90% | 2890 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,419 psi | 85% | 2795 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,114 psi | 56% | 1768 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 57,711 psi | 89% | 2825 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,361 psi | 85% | 2831 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 58,291 psi | 90% | 2963 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 57,928 psi | 89% | 2995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,114 psi | 85% | 2923 fps | 99.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 58,798 psi | 90% | 3015 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 84% | 55,564 psi | 85% | 2772 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 58,639 psi | 90% | 2841 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 57,783 psi | 89% | 2881 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 57,522 psi | 88% | 2858 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,608 psi | 86% | 2831 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,709 psi | 86% | 2822 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,362 psi | 87% | 2828 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,318 psi | 87% | 2864 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,695 psi | 86% | 2887 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 57,232 psi | 88% | 2851 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 57,696 psi | 89% | 2867 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,101 psi | 86% | 2730 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,246 psi | 87% | 2726 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,811 psi | 86% | 2785 fps | 98.1% |
| Somchem S321 | <<locked>> | 82% | 56,014 psi | 86% | 2828 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 58,726 psi | 90% | 2772 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,840 psi | 87% | 2838 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 57,740 psi | 89% | 2874 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,489 psi | 81% | 2890 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 48,675 psi | 75% | 2772 fps | 96.3% |
| Vihtavuori N130 | <<locked>> | 82% | 55,709 psi | 86% | 2690 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,391 psi | 87% | 2713 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 58,349 psi | 90% | 2799 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,535 psi | 85% | 2769 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,869 psi | 86% | 2805 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 57,072 psi | 88% | 2887 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 84% | 55,245 psi | 85% | 2795 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 57,305 psi | 88% | 2815 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,941 psi | 86% | 2890 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,686 psi | 69% | 2772 fps | 99.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 57,406 psi | 88% | 2864 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,347 psi | 85% | 2844 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 58,682 psi | 90% | 2959 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,361 psi | 56% | 2707 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 88% | 57,740 psi | 89% | 2877 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% | 50,299 psi | 77% | 2654 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,859 psi | 66% | 2579 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,256 psi | 77% | 2736 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 44,802 psi | 69% | 2605 fps | 95% |
| Accurate 3100 | <<locked>> | 98% | 39,784 psi | 61% | 2612 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 40,567 psi | 62% | 2579 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 34,229 psi | 53% | 2510 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 46,180 psi | 71% | 2690 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 39,436 psi | 61% | 2543 fps | 97.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,269 psi | 74% | 2697 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 48,979 psi | 75% | 2677 fps | 100% |
| Alliant Power Pro 2000-MR | 53.4 gr | 80% | 42,206 psi | 65% | 2726 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,117 psi | 60% | 2566 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,872 psi | 64% | 2628 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 84% | 34,490 psi | 53% | 2526 fps | 95.9% |
| Alliant Reloder-17 | 52.6 gr | 80% | 33,808 psi | 52% | 2536 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 29,863 psi | 46% | 2431 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 92% | 34,447 psi | 53% | 2605 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,440 psi | 70% | 2694 fps | 98.8% |
| Bofors RP3 | <<locked>> | 80% | 38,899 psi | 60% | 2572 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 44,933 psi | 69% | 2644 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,067 psi | 77% | 2684 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,384 psi | 73% | 2720 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,576 psi | 81% | 2871 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 80% | 39,566 psi | 61% | 2572 fps | 96.9% |
| Hodgdon H414 | <<locked>> | 88% | 41,989 psi | 65% | 2674 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 90% | 48,704 psi | 75% | 2753 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 46,659 psi | 72% | 2700 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 29,689 psi | 46% | 2369 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,873 psi | 66% | 2677 fps | 99.6% |
| Hodgdon Superformance | 62.5 gr | 90% | 44,512 psi | 68% | 2746 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,571 psi | 41% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,860 psi | 69% | 2654 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 46,499 psi | 72% | 2690 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,394 psi | 64% | 2579 fps | 98.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,714 psi | 67% | 2595 fps | 95.6% |
| IMR 4350 | <<locked>> | 92% | 45,078 psi | 69% | 2671 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 43,801 psi | 67% | 2625 fps | 95.5% |
| IMR 4831 | <<locked>> | 84% | 33,272 psi | 51% | 2470 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 42,931 psi | 66% | 2657 fps | 99.1% |
| IMR 8208 XBR | <<locked>> | 80% | 48,269 psi | 74% | 2697 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 54,969 psi | 85% | 2782 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 45,730 psi | 70% | 2671 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,195 psi | 71% | 2628 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 41,394 psi | 64% | 2582 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 38,450 psi | 59% | 2523 fps | 95.6% |
| Lovex S070 | <<locked>> | 88% | 41,249 psi | 63% | 2602 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 45,252 psi | 70% | 2641 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 45,658 psi | 70% | 2648 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,263 psi | 63% | 2615 fps | 98.8% |
| Norma 204 | <<locked>> | 96% | 51,445 psi | 79% | 2822 fps | 95.6% |
| Norma MRP | <<locked>> | 98% | 42,511 psi | 65% | 2759 fps | 95.1% |
| Norma URP | <<locked>> | 84% | 34,635 psi | 53% | 2513 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 40,930 psi | 63% | 2631 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 88% | 38,363 psi | 59% | 2602 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 48,356 psi | 74% | 2707 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,964 psi | 74% | 2726 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,040 psi | 80% | 2746 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,905 psi | 41% | 1581 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 54,056 psi | 83% | 2772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,871 psi | 61% | 2556 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,440 psi | 68% | 2736 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,998 psi | 55% | 2605 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 34,113 psi | 52% | 2530 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 36,405 psi | 56% | 2589 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 49,284 psi | 76% | 2680 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,076 psi | 66% | 2595 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 36,593 psi | 56% | 2516 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 44,933 psi | 69% | 2644 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 38,450 psi | 59% | 2523 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,730 psi | 70% | 2671 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,394 psi | 64% | 2582 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 41,249 psi | 63% | 2602 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,565 psi | 58% | 2566 fps | 98% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,717 psi | 72% | 2684 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,831 psi | 69% | 2661 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,557 psi | 72% | 2592 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,885 psi | 60% | 2461 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,105 psi | 66% | 2575 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 52,272 psi | 80% | 2776 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,122 psi | 71% | 2592 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,296 psi | 71% | 2677 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 37,246 psi | 57% | 2520 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 27,253 psi | 42% | 2356 fps | 96.3% |
| Somchem S385 | <<locked>> | 98% | 45,730 psi | 70% | 2720 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 52,475 psi | 81% | 2648 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,905 psi | 72% | 2582 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,757 psi | 66% | 2575 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,308 psi | 67% | 2585 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,534 psi | 55% | 2457 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 33,823 psi | 52% | 2461 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 48,544 psi | 75% | 2694 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,669 psi | 64% | 2572 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 35,563 psi | 55% | 2516 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 90% | 32,198 psi | 50% | 2507 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,357 psi | 48% | 2382 fps | 96.7% |
| Winchester 748 | <<locked>> | 80% | 48,457 psi | 75% | 2740 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 41,989 psi | 65% | 2674 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 94% | 29,950 psi | 46% | 2510 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,425 psi | 68% | 2667 fps | 99.6% |
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 100 powders for .300 Rem. SA Ultra Mag. loaded with the .308 | 170gr | Geco PLUS. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,015 fps; across all powders the maximum-charge window runs from 1,729 fps to 3,015 fps. Accurate 3100 gives the best case fill at 100 %, and 100 of the 100 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 170.0 gr projectile in 0.308" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, 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. Alliant Power Pro 2000-MR, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .300 Rem. SA Ultra Mag. with the .308 | 170gr | Geco PLUS 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.