Load Specifications
Load data in caliber 7 mm Rem. SA Ultra Mag. with .284 | 150gr | 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 60, Alliant Reloder-26 and ReloadSwiss RS 70.
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>> | 82% | 56,927 psi | 88% | 2749 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,579 psi | 87% | 2799 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,433 psi | 84% | 2851 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 56,797 psi | 87% | 2799 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,637 psi | 87% | 2900 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 57,899 psi | 89% | 2864 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 58,682 psi | 90% | 2864 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,623 psi | 87% | 2930 fps | 98% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,288 psi | 84% | 2917 fps | 96.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 58,102 psi | 89% | 2992 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,623 psi | 87% | 2844 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,782 psi | 87% | 2867 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,289 psi | 87% | 2943 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 57,711 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,825 psi | 86% | 2917 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,142 psi | 82% | 2920 fps | 97.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,444 psi | 78% | 2861 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,425 psi | 68% | 2789 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,682 psi | 89% | 3054 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,740 psi | 89% | 2881 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,153 psi | 76% | 2851 fps | 96.7% |
| Bofors RP3 | <<locked>> | 86% | 57,711 psi | 89% | 2864 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,142 psi | 82% | 2920 fps | 97.7% |
| Bofors RP7 | <<locked>> | 90% | 56,898 psi | 88% | 2844 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 86% | 57,957 psi | 89% | 2881 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 58,073 psi | 89% | 2943 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 90% | 57,827 psi | 89% | 2900 fps | 98.5% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 58,146 psi | 89% | 2920 fps | 96.4% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 56,826 psi | 87% | 2904 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 82% | 58,552 psi | 90% | 2871 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,869 psi | 87% | 2871 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 58,784 psi | 90% | 2910 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 58,247 psi | 90% | 2982 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,738 psi | 57% | 1759 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,970 psi | 86% | 2822 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 58,465 psi | 90% | 2848 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,595 psi | 89% | 2831 fps | 99.2% |
| IMR 4350 | <<locked>> | 94% | 57,232 psi | 88% | 2871 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,972 psi | 89% | 2867 fps | 99.2% |
| IMR 4831 | <<locked>> | 94% | 56,579 psi | 87% | 2887 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 58,189 psi | 90% | 2894 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,173 psi | 86% | 2854 fps | 96.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,112 psi | 80% | 2894 fps | 95.9% |
| Lovex S060 | <<locked>> | 82% | 56,492 psi | 87% | 2782 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,854 psi | 86% | 2802 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 58,421 psi | 90% | 2867 fps | 99.8% |
| Lovex S070 | <<locked>> | 92% | 56,376 psi | 87% | 2858 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,730 psi | 70% | 2707 fps | 98.3% |
| Norma 201 | <<locked>> | 82% | 57,276 psi | 88% | 2812 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,363 psi | 88% | 2802 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,086 psi | 86% | 2854 fps | 100% |
| Norma 204 | <<locked>> | 94% | 58,088 psi | 89% | 2927 fps | 98.1% |
| Norma MRPᴾ | <<locked>> | 100% | 56,594 psi | 87% | 3009 fps | 99.3% |
| Norma URP | <<locked>> | 94% | 58,378 psi | 90% | 2933 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,449 psi | 87% | 2874 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,054 psi | 80% | 2900 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 94% | 56,913 psi | 88% | 2930 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,978 psi | 72% | 2789 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,536 psi | 58% | 1801 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,537 psi | 89% | 2858 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,624 psi | 89% | 2933 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,334 psi | 88% | 2966 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,956 psi | 86% | 2920 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,914 psi | 89% | 2999 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,511 psi | 67% | 2805 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 84% | 57,725 psi | 89% | 2808 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,899 psi | 89% | 2861 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 58,392 psi | 90% | 2897 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 98% | 55,347 psi | 85% | 2907 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 56,898 psi | 88% | 2844 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 58,421 psi | 90% | 2867 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 55,854 psi | 86% | 2802 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,376 psi | 87% | 2858 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 58,552 psi | 90% | 2913 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,347 psi | 87% | 2835 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,464 psi | 88% | 2733 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 58,088 psi | 89% | 2733 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 58,233 psi | 90% | 2818 fps | 99.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 58,581 psi | 90% | 2959 fps | 98.5% |
| Somchem S335 | <<locked>> | 82% | 57,508 psi | 88% | 2736 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,435 psi | 88% | 2851 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 56,739 psi | 87% | 2838 fps | 96.1% |
| Somchem S365 | <<locked>> | 96% | 57,290 psi | 88% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,391 psi | 87% | 2887 fps | 98.8% |
| Vihtavuori N133 | <<locked>> | 82% | 57,841 psi | 89% | 2713 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,914 psi | 89% | 2766 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 58,044 psi | 89% | 2782 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,303 psi | 85% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,797 psi | 87% | 2871 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,837 psi | 80% | 2802 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 56,318 psi | 87% | 2782 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,202 psi | 86% | 2881 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,869 psi | 87% | 2943 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,840 psi | 87% | 2992 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,188 psi | 86% | 2838 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 58,392 psi | 90% | 2946 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,919 psi | 71% | 2923 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,391 psi | 87% | 2841 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,014 psi | 86% | 2874 fps | 97.9% |
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% | 53,432 psi | 82% | 2703 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,821 psi | 77% | 2690 fps | 97.5% |
| Accurate 3100 | <<locked>> | 86% | 35,128 psi | 54% | 2490 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 50,488 psi | 78% | 2710 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,769 psi | 60% | 2585 fps | 98.3% |
| ADI AR 2206H | <<locked>> | 80% | 54,781 psi | 84% | 2815 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 46,615 psi | 72% | 2671 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 44,222 psi | 68% | 2707 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 98% | 51,213 psi | 79% | 2861 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,821 psi | 78% | 2881 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,311 psi | 73% | 2700 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,459 psi | 78% | 2766 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,014 psi | 57% | 2579 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,756 psi | 64% | 2703 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,888 psi | 68% | 2703 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 44,280 psi | 68% | 2756 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,007 psi | 43% | 2356 fps | 96.2% |
| Alliant Reloder-25 | <<locked>> | 92% | 35,128 psi | 54% | 2569 fps | 95.9% |
| Alliant Reloder-26 | 51.7 gr | 82% | 31,604 psi | 49% | 2516 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 54,128 psi | 83% | 2828 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 43,497 psi | 67% | 2736 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 48,066 psi | 74% | 2717 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 44,280 psi | 68% | 2756 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 42,293 psi | 65% | 2585 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 48,138 psi | 74% | 2723 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 39,914 psi | 61% | 2615 fps | 96% |
| Hodgdon H4350 | <<locked>> | 80% | 42,714 psi | 66% | 2631 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 98% | 54,447 psi | 84% | 2864 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,548 psi | 82% | 2848 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 55,347 psi | 85% | 2825 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,795 psi | 54% | 2480 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,866 psi | 80% | 2812 fps | 100% |
| Hodgdon Superformance | <<locked>> | 80% | 38,870 psi | 60% | 2621 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 42% | 1568 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,591 psi | 81% | 2772 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,052 psi | 75% | 2703 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,995 psi | 78% | 2726 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 40,103 psi | 62% | 2562 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,265 psi | 67% | 2608 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 37,072 psi | 57% | 2536 fps | 97.9% |
| IMR 4895 | <<locked>> | 80% | 51,677 psi | 80% | 2795 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,823 psi | 81% | 2802 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 98% | 48,892 psi | 75% | 2835 fps | 95% |
| Lovex S060 | <<locked>> | 80% | 53,403 psi | 82% | 2736 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,617 psi | 76% | 2707 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,292 psi | 64% | 2569 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 39,595 psi | 61% | 2552 fps | 96% |
| Lovex S071 | <<locked>> | 90% | 34,229 psi | 53% | 2467 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 53,809 psi | 83% | 2762 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,215 psi | 83% | 2759 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,850 psi | 77% | 2756 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,860 psi | 69% | 2700 fps | 95.3% |
| Norma MRP | <<locked>> | 88% | 38,421 psi | 59% | 2661 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 37,884 psi | 58% | 2569 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 80% | 49,661 psi | 76% | 2769 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,762 psi | 75% | 2841 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 36,753 psi | 57% | 2556 fps | 95.9% |
| Ramshot Magnum | <<locked>> | 96% | 41,104 psi | 63% | 2671 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,065 psi | 43% | 1608 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,776 psi | 74% | 2700 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 54,056 psi | 83% | 2881 fps | 100% |
| ReloadSwiss RS 60 | 49.3 gr | 80% | 44,164 psi | 68% | 2756 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,884 psi | 58% | 2595 fps | 97.8% |
| ReloadSwiss RS 70 | 50 gr | 80% | 36,709 psi | 56% | 2592 fps | 96.9% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,712 psi | 63% | 2740 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 51,590 psi | 79% | 2720 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,252 psi | 70% | 2664 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 48,617 psi | 75% | 2736 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 90% | 43,033 psi | 66% | 2687 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 42,293 psi | 65% | 2585 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,292 psi | 64% | 2569 fps | 97.6% |
| Shooters World Precision | <<locked>> | 80% | 49,617 psi | 76% | 2707 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,595 psi | 61% | 2552 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,745 psi | 70% | 2710 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,982 psi | 82% | 2785 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,259 psi | 83% | 2690 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,079 psi | 71% | 2566 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,625 psi | 63% | 2516 fps | 96.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 42,656 psi | 66% | 2680 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 54,099 psi | 83% | 2690 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,397 psi | 70% | 2661 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 53,432 psi | 82% | 2785 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 34,592 psi | 53% | 2533 fps | 99.6% |
| Somchem S385 | <<locked>> | 88% | 41,408 psi | 64% | 2625 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 54,607 psi | 84% | 2671 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,517 psi | 79% | 2680 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,343 psi | 79% | 2690 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,279 psi | 67% | 2589 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,349 psi | 61% | 2566 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 94% | 43,062 psi | 66% | 2648 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 49,879 psi | 77% | 2690 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,972 psi | 60% | 2572 fps | 98% |
| Vihtavuori N555 | <<locked>> | 80% | 30,719 psi | 47% | 2438 fps | 96.4% |
| Vihtavuori N560 | <<locked>> | 98% | 53,098 psi | 82% | 2933 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,218 psi | 59% | 2533 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 39,914 psi | 61% | 2615 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,672 psi | 41% | 2395 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,997 psi | 82% | 2792 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,963 psi | 71% | 2707 fps | 95.8% |
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 107 powders for 7 mm Rem. SA Ultra Mag. loaded with the .284 | 150gr | Barnes X S. Alliant Reloder-26 delivers the highest muzzle velocity at 3,054 fps; across all powders the maximum-charge window runs from 1,759 fps to 3,054 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 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 150.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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 Reloder-26, ReloadSwiss RS 70 rank at the top here: for 7 mm Rem. SA Ultra Mag. with the .284 | 150gr | Barnes X S they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 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.