Load Specifications
Bullet:.284 | 140gr | Barnes X S
Bullet Manufacturer:Barnes
Bullet Weight:140 gr
Bullet Diameter:0.284"
Bullet Length:<<locked>>
Case Length (l3):2.026"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:72.6 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 7 mm Rem. SA Ultra Mag. with .284 | 140gr | Barnes X S bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-16 and Hodgdon Superformance.
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 2495 | <<locked>> | 84% | 58,001 psi | 89% | 2864 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,696 psi | 89% | 2907 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,561 psi | 79% | 2897 fps | 98.7% |
| Accurate 4064 | <<locked>> | 86% | 57,827 psi | 89% | 2913 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,566 psi | 89% | 3009 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 55,999 psi | 86% | 2933 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,724 psi | 87% | 2930 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 57,711 psi | 89% | 3031 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,986 psi | 89% | 2923 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,608 psi | 86% | 3054 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,711 psi | 89% | 2959 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,856 psi | 89% | 2979 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,334 psi | 88% | 3058 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 58,668 psi | 90% | 3084 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 56,811 psi | 87% | 3022 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,792 psi | 78% | 2966 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,921 psi | 74% | 2913 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,322 psi | 65% | 2825 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,578 psi | 84% | 3104 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,622 psi | 86% | 2946 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 55,405 psi | 85% | 2930 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,792 psi | 78% | 2966 fps | 96.4% |
| Bofors RP7 | <<locked>> | 92% | 58,044 psi | 89% | 2953 fps | 98.4% |
| Hodgdon BL-C2 | <<locked>> | 82% | 58,044 psi | 89% | 2959 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 55,506 psi | 85% | 2936 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 55,492 psi | 85% | 2995 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 90% | 55,550 psi | 85% | 2956 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 82% | 56,623 psi | 87% | 2940 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 57,551 psi | 89% | 2976 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,391 psi | 87% | 2976 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,506 psi | 85% | 3031 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,622 psi | 56% | 1821 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,232 psi | 88% | 2940 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,927 psi | 88% | 2917 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,246 psi | 87% | 2913 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,521 psi | 85% | 2890 fps | 98.5% |
| IMR 4350 | <<locked>> | 96% | 58,102 psi | 89% | 2976 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,999 psi | 86% | 2927 fps | 98.5% |
| IMR 4831 | <<locked>> | 96% | 57,537 psi | 89% | 2995 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,825 psi | 86% | 2956 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 57,986 psi | 89% | 2923 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,492 psi | 87% | 2907 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,957 psi | 89% | 2900 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,695 psi | 87% | 2910 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,260 psi | 87% | 2927 fps | 99.4% |
| Lovex S070 | <<locked>> | 94% | 57,551 psi | 89% | 2966 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,424 psi | 67% | 2749 fps | 97.2% |
| Norma 201 | <<locked>> | 84% | 58,595 psi | 90% | 2930 fps | 100% |
| Norma 202 | <<locked>> | 84% | 58,697 psi | 90% | 2920 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,130 psi | 88% | 2966 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,521 psi | 85% | 2976 fps | 97% |
| Norma MRPᴾ | <<locked>> | 100% | 53,635 psi | 83% | 3051 fps | 98.4% |
| Norma URP | <<locked>> | 94% | 55,753 psi | 86% | 2989 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 57,595 psi | 89% | 2989 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 57,812 psi | 89% | 3038 fps | 99.4% |
| Ramshot TAC | <<locked>> | 82% | 58,073 psi | 89% | 2949 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 58,088 psi | 89% | 2966 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,101 psi | 57% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,463 psi | 85% | 2917 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,926 psi | 85% | 2992 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 58,378 psi | 90% | 3084 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,710 psi | 87% | 3025 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,172 psi | 85% | 3051 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 55,883 psi | 86% | 2881 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 58,798 psi | 90% | 2972 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,970 psi | 86% | 2946 fps | 96% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,217 psi | 86% | 3009 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 92% | 58,044 psi | 89% | 2953 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,260 psi | 87% | 2927 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,492 psi | 87% | 2907 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,695 psi | 87% | 2910 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,551 psi | 89% | 2966 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,173 psi | 86% | 2972 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,261 psi | 88% | 2933 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,711 psi | 89% | 2953 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,535 psi | 85% | 2802 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,217 psi | 86% | 2805 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,057 psi | 86% | 2874 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,695 psi | 86% | 3005 fps | 97.4% |
| Somchem S335 | <<locked>> | 82% | 55,477 psi | 85% | 2805 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,637 psi | 87% | 2920 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 58,523 psi | 90% | 2963 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 58,001 psi | 89% | 3041 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,290 psi | 88% | 2992 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 82% | 55,854 psi | 86% | 2785 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,579 psi | 86% | 2835 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,767 psi | 86% | 2851 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,318 psi | 87% | 2890 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 57,899 psi | 89% | 2979 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,327 psi | 76% | 2844 fps | 96.5% |
| Vihtavuori N530 | <<locked>> | 82% | 58,479 psi | 90% | 2923 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 57,348 psi | 88% | 2894 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,145 psi | 88% | 2989 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,925 psi | 83% | 2999 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 57,421 psi | 88% | 2946 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,840 psi | 86% | 3002 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,511 psi | 67% | 2959 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 57,711 psi | 89% | 2959 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,476 psi | 82% | 2920 fps | 96.7% |
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 2495 | <<locked>> | 80% | 51,213 psi | 79% | 2769 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,921 psi | 74% | 2743 fps | 96.4% |
| Accurate 3100 | <<locked>> | 90% | 37,623 psi | 58% | 2628 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 48,428 psi | 75% | 2772 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,782 psi | 57% | 2628 fps | 97% |
| ADI AR 2206H | <<locked>> | 80% | 52,692 psi | 81% | 2877 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,875 psi | 69% | 2726 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 94% | 48,022 psi | 74% | 2864 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,578 psi | 84% | 2874 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,733 psi | 75% | 2936 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,411 psi | 70% | 2759 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,399 psi | 74% | 2822 fps | 99.6% |
| Alliant Reloder-16 | 46.1 gr | 80% | 35,462 psi | 55% | 2618 fps | 96.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,740 psi | 61% | 2749 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 47,471 psi | 73% | 2858 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 47,703 psi | 73% | 2907 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,398 psi | 44% | 2441 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 94% | 35,636 psi | 55% | 2654 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 86% | 34,084 psi | 52% | 2664 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,098 psi | 80% | 2890 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 45,992 psi | 71% | 2772 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 47,703 psi | 73% | 2907 fps | 95.7% |
| Bofors RP7 | <<locked>> | 82% | 43,236 psi | 67% | 2687 fps | 95.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 54,636 psi | 84% | 2910 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 46,122 psi | 71% | 2772 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 40,509 psi | 62% | 2713 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 84% | 46,253 psi | 71% | 2789 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 53,301 psi | 82% | 2890 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,199 psi | 51% | 2523 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,559 psi | 76% | 2871 fps | 100% |
| Hodgdon Superformance | 55.1 gr | 84% | 42,250 psi | 65% | 2779 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 42% | 1627 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,589 psi | 78% | 2831 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,650 psi | 83% | 2871 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,195 psi | 73% | 2762 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,197 psi | 76% | 2782 fps | 97.4% |
| IMR 4350 | <<locked>> | 86% | 43,149 psi | 66% | 2710 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,640 psi | 64% | 2657 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 35,302 psi | 54% | 2579 fps | 96.7% |
| IMR 4895 | <<locked>> | 80% | 49,632 psi | 76% | 2854 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 80% | 54,578 psi | 84% | 2874 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 53,084 psi | 82% | 2858 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,619 psi | 79% | 2802 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,703 psi | 73% | 2766 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,653 psi | 61% | 2615 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 40,292 psi | 62% | 2648 fps | 95.4% |
| Lovex S071 | <<locked>> | 94% | 36,260 psi | 56% | 2595 fps | 95% |
| Norma 201 | <<locked>> | 80% | 51,909 psi | 80% | 2828 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,156 psi | 80% | 2825 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,790 psi | 74% | 2812 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 48,704 psi | 75% | 2858 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 41,321 psi | 64% | 2808 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 36,274 psi | 56% | 2615 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 80% | 47,659 psi | 73% | 2828 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 37,289 psi | 57% | 2648 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 54,520 psi | 84% | 2894 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 54,447 psi | 84% | 2913 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,992 psi | 43% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,064 psi | 71% | 2753 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,547 psi | 79% | 2936 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,134 psi | 65% | 2808 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,911 psi | 55% | 2631 fps | 96.4% |
| ReloadSwiss RS 70 | 50.5 gr | 80% | 35,244 psi | 54% | 2631 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 49,719 psi | 76% | 2782 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,497 psi | 67% | 2720 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 96% | 52,576 psi | 81% | 2890 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 94% | 46,412 psi | 71% | 2838 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 82% | 43,236 psi | 67% | 2687 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,653 psi | 61% | 2615 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,084 psi | 82% | 2858 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,703 psi | 73% | 2766 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 40,292 psi | 62% | 2648 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,714 psi | 67% | 2762 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,548 psi | 82% | 2877 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,937 psi | 78% | 2848 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,388 psi | 81% | 2759 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,367 psi | 68% | 2625 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 41,452 psi | 64% | 2615 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,963 psi | 71% | 2831 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 52,272 psi | 80% | 2759 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,011 psi | 82% | 2864 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,540 psi | 67% | 2713 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 32,851 psi | 51% | 2575 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 42,047 psi | 65% | 2720 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 52,765 psi | 81% | 2743 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,458 psi | 76% | 2749 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,603 psi | 76% | 2759 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,684 psi | 64% | 2648 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 37,550 psi | 58% | 2612 fps | 97.1% |
| Vihtavuori N165 | <<locked>> | 98% | 46,267 psi | 71% | 2792 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 54,955 psi | 85% | 2874 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 47,892 psi | 74% | 2753 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,144 psi | 57% | 2615 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 30,966 psi | 48% | 2523 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,753 psi | 57% | 2582 fps | 98.8% |
| Winchester 760 | <<locked>> | 82% | 40,683 psi | 63% | 2717 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 86% | 28,572 psi | 44% | 2530 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,749 psi | 78% | 2851 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,789 psi | 72% | 2802 fps | 95.1% |
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 99 powders for 7 mm Rem. SA Ultra Mag. loaded with the .284 | 140gr | Barnes X S. Alliant Reloder-26 delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,821 fps to 3,104 fps. Accurate 3100 gives the best case fill at 100 %, and 99 of the 99 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 140.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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 70, Alliant Reloder-16, Hodgdon Superformance rank at the top here: for 7 mm Rem. SA Ultra Mag. with the .284 | 140gr | 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.