Load Specifications
Load data in caliber 7 mm Rem. SA Ultra Mag. with .284 | 160gr | Speer Magnum Tip Soft Point bullet and 97 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 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.
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 2495 | <<locked>> | 82% | 56,173 psi | 86% | 2684 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,203 psi | 88% | 2759 fps | 99.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,317 psi | 85% | 2805 fps | 99.9% |
| Accurate 4064 | <<locked>> | 84% | 56,623 psi | 87% | 2740 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,725 psi | 89% | 2854 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 57,464 psi | 88% | 2949 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 86% | 56,521 psi | 87% | 2772 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 58,450 psi | 90% | 2900 fps | 99% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,072 psi | 86% | 2897 fps | 97.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,869 psi | 86% | 2894 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,464 psi | 88% | 2795 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,624 psi | 89% | 2818 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 58,175 psi | 89% | 2904 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,999 psi | 86% | 2881 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,638 psi | 89% | 2887 fps | 99% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,056 psi | 85% | 2894 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,996 psi | 80% | 2822 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,208 psi | 70% | 2756 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,999 psi | 86% | 2963 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,488 psi | 78% | 2818 fps | 98% |
| Bofors RP3 | <<locked>> | 86% | 58,508 psi | 90% | 2812 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,056 psi | 85% | 2894 fps | 98.8% |
| Bofors RP7 | <<locked>> | 90% | 57,450 psi | 88% | 2799 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 84% | 55,027 psi | 85% | 2779 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 55,985 psi | 86% | 2854 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 88% | 55,593 psi | 86% | 2812 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 98% | 56,043 psi | 86% | 2838 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,810 psi | 84% | 2822 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 58,552 psi | 90% | 2828 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,318 psi | 87% | 2812 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,106 psi | 68% | 2785 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 90% | 56,217 psi | 86% | 2890 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,463 psi | 56% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,797 psi | 87% | 2772 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,956 psi | 86% | 2756 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 58,523 psi | 90% | 2792 fps | 99.7% |
| IMR 4350 | <<locked>> | 94% | 58,711 psi | 90% | 2838 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,724 psi | 86% | 2776 fps | 99.5% |
| IMR 4831 | <<locked>> | 94% | 57,856 psi | 89% | 2841 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,535 psi | 85% | 2792 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,696 psi | 89% | 2828 fps | 97.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,447 psi | 82% | 2867 fps | 97.4% |
| Lovex S060 | <<locked>> | 82% | 57,566 psi | 89% | 2740 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 56,188 psi | 86% | 2746 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,970 psi | 86% | 2776 fps | 99.9% |
| Lovex S070 | <<locked>> | 92% | 57,319 psi | 88% | 2818 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,992 psi | 71% | 2661 fps | 99% |
| Norma 201 | <<locked>> | 82% | 57,464 psi | 88% | 2756 fps | 100% |
| Norma 202 | <<locked>> | 82% | 58,305 psi | 90% | 2753 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,913 psi | 88% | 2802 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,883 psi | 86% | 2838 fps | 98.6% |
| Norma MRPᴾ | <<locked>> | 100% | 58,740 psi | 90% | 2979 fps | 99.8% |
| Norma URP | <<locked>> | 92% | 56,188 psi | 86% | 2838 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,769 psi | 89% | 2831 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,722 psi | 83% | 2884 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 94% | 58,450 psi | 90% | 2890 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,095 psi | 74% | 2762 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,188 psi | 57% | 1759 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 58,523 psi | 90% | 2818 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,347 psi | 85% | 2867 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 57,305 psi | 88% | 2874 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,796 psi | 86% | 2907 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,077 psi | 68% | 2782 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 84% | 58,262 psi | 90% | 2759 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 58,668 psi | 90% | 2808 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,492 psi | 87% | 2815 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 98% | 57,116 psi | 88% | 2877 fps | 99% |
| Rottweil R 907 | <<locked>> | 90% | 57,450 psi | 88% | 2799 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,970 psi | 86% | 2776 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 56,188 psi | 86% | 2746 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,319 psi | 88% | 2818 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,347 psi | 87% | 2815 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,232 psi | 88% | 2789 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 58,204 psi | 90% | 2684 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,753 psi | 86% | 2644 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,564 psi | 85% | 2730 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,623 psi | 87% | 2871 fps | 98.9% |
| Somchem S335 | <<locked>> | 82% | 57,841 psi | 89% | 2680 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 58,378 psi | 90% | 2805 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 58,291 psi | 90% | 2812 fps | 97.4% |
| Somchem S365 | <<locked>> | 94% | 55,651 psi | 86% | 2838 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,450 psi | 88% | 2848 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 82% | 58,769 psi | 90% | 2664 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 58,581 psi | 90% | 2710 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,434 psi | 85% | 2687 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,202 psi | 86% | 2730 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 58,378 psi | 90% | 2831 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,185 psi | 82% | 2769 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 84% | 56,927 psi | 88% | 2730 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 57,377 psi | 88% | 2838 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 58,102 psi | 89% | 2897 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,897 psi | 84% | 2910 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 57,899 psi | 89% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,985 psi | 86% | 2854 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,065 psi | 72% | 2887 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,566 psi | 89% | 2795 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,885 psi | 89% | 2844 fps | 98.9% |
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% | 52,663 psi | 81% | 2638 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,270 psi | 77% | 2654 fps | 98.4% |
| Accurate 3100 | <<locked>> | 84% | 32,213 psi | 50% | 2379 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 49,922 psi | 77% | 2644 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,290 psi | 59% | 2530 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 96% | 50,067 psi | 77% | 2831 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 47,108 psi | 72% | 2628 fps | 100% |
| ADI AR 2209 | <<locked>> | 88% | 42,293 psi | 65% | 2621 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 94% | 45,847 psi | 71% | 2720 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,330 psi | 81% | 2841 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,601 psi | 73% | 2651 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,865 psi | 78% | 2717 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,130 psi | 57% | 2536 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,279 psi | 65% | 2657 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,771 psi | 64% | 2612 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,320 psi | 60% | 2605 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,282 psi | 42% | 2300 fps | 97% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,024 psi | 48% | 2421 fps | 95.2% |
| Alliant Reloder-26 | 52.1 gr | 80% | 29,051 psi | 45% | 2405 fps | 95.2% |
| Bofors RP15 | <<locked>> | 94% | 41,597 psi | 64% | 2651 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 47,993 psi | 74% | 2661 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 39,320 psi | 60% | 2605 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 42,206 psi | 65% | 2539 fps | 96.9% |
| Hodgdon H380 | <<locked>> | 80% | 48,196 psi | 74% | 2671 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 40,277 psi | 62% | 2575 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 43,033 psi | 66% | 2592 fps | 96.5% |
| Hodgdon H4831 | <<locked>> | 94% | 49,124 psi | 76% | 2726 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,080 psi | 74% | 2710 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,751 psi | 53% | 2434 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,895 psi | 81% | 2762 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 38,899 psi | 60% | 2664 fps | 95.3% |
| Hodgdon Superformance | 53.8 gr | 80% | 39,131 psi | 60% | 2585 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,224 psi | 42% | 1532 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,359 psi | 82% | 2723 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,559 psi | 76% | 2657 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,750 psi | 80% | 2690 fps | 99.1% |
| IMR 4350 | <<locked>> | 80% | 37,753 psi | 58% | 2470 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,540 psi | 67% | 2569 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 36,811 psi | 57% | 2484 fps | 98.6% |
| IMR 4895 | <<locked>> | 80% | 52,170 psi | 80% | 2743 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,906 psi | 74% | 2667 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 96% | 46,659 psi | 72% | 2749 fps | 95.7% |
| Lovex S060 | <<locked>> | 80% | 54,157 psi | 83% | 2690 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,821 psi | 77% | 2654 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,046 psi | 63% | 2520 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 39,450 psi | 61% | 2507 fps | 97% |
| Lovex S071 | <<locked>> | 88% | 31,285 psi | 48% | 2356 fps | 95% |
| Norma 201 | <<locked>> | 80% | 53,983 psi | 83% | 2707 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,781 psi | 84% | 2703 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,198 psi | 77% | 2703 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,685 psi | 66% | 2608 fps | 95.8% |
| Norma MRP | <<locked>> | 86% | 36,100 psi | 56% | 2559 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 38,087 psi | 59% | 2523 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 50,676 psi | 78% | 2726 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 43,584 psi | 67% | 2697 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 36,883 psi | 57% | 2513 fps | 96.9% |
| Ramshot Magnum | <<locked>> | 94% | 38,551 psi | 59% | 2575 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,934 psi | 43% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,153 psi | 74% | 2657 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,904 psi | 69% | 2710 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,942 psi | 58% | 2546 fps | 98.5% |
| ReloadSwiss RS 70 | 51.7 gr | 80% | 36,883 psi | 57% | 2556 fps | 98% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 35,766 psi | 55% | 2582 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 51,692 psi | 80% | 2667 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,324 psi | 70% | 2612 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 43,758 psi | 67% | 2598 fps | 95% |
| Rottweil R 905 | <<locked>> | 88% | 40,872 psi | 63% | 2595 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 42,206 psi | 65% | 2539 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,046 psi | 63% | 2520 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 49,821 psi | 77% | 2654 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,450 psi | 61% | 2507 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,412 psi | 71% | 2664 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,838 psi | 83% | 2740 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,911 psi | 84% | 2641 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,514 psi | 72% | 2516 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,248 psi | 62% | 2467 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,495 psi | 62% | 2592 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 54,433 psi | 84% | 2638 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,397 psi | 70% | 2605 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 47,732 psi | 73% | 2644 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 34,403 psi | 53% | 2480 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 36,564 psi | 56% | 2474 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 55,477 psi | 85% | 2621 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 52,011 psi | 80% | 2625 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,098 psi | 80% | 2641 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,526 psi | 67% | 2543 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,407 psi | 61% | 2520 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 38,392 psi | 59% | 2507 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 50,096 psi | 77% | 2635 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,754 psi | 60% | 2520 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 30,110 psi | 46% | 2375 fps | 97.1% |
| Vihtavuori N560 | <<locked>> | 94% | 48,008 psi | 74% | 2789 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,479 psi | 59% | 2490 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 40,277 psi | 62% | 2575 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,163 psi | 37% | 2274 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,824 psi | 83% | 2743 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 40,930 psi | 63% | 2566 fps | 95.5% |
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 97 powders for 7 mm Rem. SA Ultra Mag. loaded with the .284 | 160gr | Speer Magnum Tip Soft Point. Norma MRP delivers the highest muzzle velocity at 2,979 fps; across all powders the maximum-charge window runs from 1,719 fps to 2,979 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 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 160.0 gr projectile in 0.284" calls for a 1:12.5 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. Alliant Reloder-26, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for 7 mm Rem. SA Ultra Mag. with the .284 | 160gr | Speer Magnum Tip Soft Point 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.