Load Specifications
Load data in caliber 7 mm Rem. SA Ultra Mag. with .284 | 173gr | RWS H-Mantel 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, Norma MRP and Vihtavuori N560.
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% | 57,653 psi | 89% | 2585 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 58,479 psi | 90% | 2664 fps | 99.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,811 psi | 87% | 2717 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 57,957 psi | 89% | 2638 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,347 psi | 85% | 2707 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 54,984 psi | 85% | 2802 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 86% | 57,754 psi | 89% | 2674 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,101 psi | 86% | 2753 fps | 99.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,217 psi | 88% | 2805 fps | 98.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 36,825 psi | 57% | 2487 fps | 96.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,348 psi | 88% | 2795 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 58,624 psi | 90% | 2694 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,332 psi | 85% | 2667 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,840 psi | 86% | 2756 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,246 psi | 88% | 2776 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,463 psi | 85% | 2743 fps | 99.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,362 psi | 87% | 2802 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,316 psi | 82% | 2726 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,398 psi | 71% | 2674 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 57,522 psi | 88% | 2867 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,822 psi | 80% | 2733 fps | 98.7% |
| Bofors RP3 | <<locked>> | 84% | 56,014 psi | 86% | 2664 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 42,235 psi | 65% | 2598 fps | 96.1% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,362 psi | 87% | 2802 fps | 99.3% |
| Bofors RP7 | <<locked>> | 90% | 58,813 psi | 90% | 2707 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,021 psi | 71% | 2615 fps | 97% |
| Hodgdon H380 | <<locked>> | 84% | 56,188 psi | 86% | 2680 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,159 psi | 88% | 2756 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 88% | 56,985 psi | 88% | 2720 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 98% | 57,435 psi | 88% | 2749 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,115 psi | 86% | 2733 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,260 psi | 87% | 2680 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,551 psi | 89% | 2710 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,353 psi | 70% | 2713 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 90% | 57,754 psi | 89% | 2799 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 56% | 1640 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,928 psi | 89% | 2671 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,072 psi | 88% | 2654 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,173 psi | 86% | 2648 fps | 99.8% |
| IMR 4350 | <<locked>> | 92% | 56,144 psi | 86% | 2690 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,869 psi | 87% | 2680 fps | 99.8% |
| IMR 4831 | <<locked>> | 92% | 55,608 psi | 86% | 2697 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,753 psi | 87% | 2694 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 58,813 psi | 90% | 2736 fps | 98.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,563 psi | 84% | 2779 fps | 98.2% |
| Lovex S060 | <<locked>> | 82% | 58,479 psi | 90% | 2635 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 57,348 psi | 88% | 2644 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,956 psi | 88% | 2677 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 58,320 psi | 90% | 2720 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,239 psi | 73% | 2579 fps | 99.5% |
| Norma 201 | <<locked>> | 82% | 58,813 psi | 90% | 2657 fps | 100% |
| Norma 203B | <<locked>> | 84% | 58,262 psi | 90% | 2703 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,203 psi | 88% | 2746 fps | 99.1% |
| Norma MRP | <<locked>> | 98% | 56,028 psi | 86% | 2825 fps | 99.9% |
| Norma URP | <<locked>> | 92% | 57,246 psi | 88% | 2736 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,274 psi | 85% | 2680 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,158 psi | 85% | 2799 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 92% | 56,202 psi | 86% | 2746 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,240 psi | 76% | 2680 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,318 psi | 57% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,985 psi | 86% | 2667 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,782 psi | 87% | 2766 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,100 psi | 85% | 2730 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,087 psi | 88% | 2808 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,223 psi | 70% | 2707 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 82% | 55,970 psi | 86% | 2612 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,202 psi | 86% | 2661 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,711 psi | 89% | 2723 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 98% | 58,407 psi | 90% | 2782 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 90% | 58,813 psi | 90% | 2707 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,956 psi | 88% | 2677 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 57,348 psi | 88% | 2644 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 58,320 psi | 90% | 2720 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,798 psi | 89% | 2720 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 58,581 psi | 90% | 2690 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,826 psi | 87% | 2543 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,710 psi | 87% | 2635 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,914 psi | 89% | 2779 fps | 99.4% |
| Somchem S355 | <<locked>> | 86% | 55,912 psi | 86% | 2654 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,782 psi | 86% | 2671 fps | 97.6% |
| Somchem S365 | <<locked>> | 94% | 57,029 psi | 88% | 2740 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 58,813 psi | 90% | 2756 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 82% | 56,376 psi | 87% | 2566 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,565 psi | 87% | 2585 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,159 psi | 88% | 2628 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,999 psi | 86% | 2684 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,592 psi | 84% | 2684 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 84% | 58,030 psi | 89% | 2625 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 58,610 psi | 90% | 2740 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,985 psi | 86% | 2749 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,246 psi | 87% | 2818 fps | 98.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,211 psi | 74% | 2680 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,143 psi | 85% | 2648 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,479 psi | 88% | 2759 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,834 psi | 75% | 2795 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 58,798 psi | 90% | 2694 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,187 psi | 85% | 2700 fps | 99% |
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% | 53,940 psi | 83% | 2539 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,430 psi | 79% | 2566 fps | 99% |
| Accurate 3100 | <<locked>> | 82% | 31,009 psi | 48% | 2257 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 51,140 psi | 79% | 2549 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,262 psi | 60% | 2448 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 94% | 47,703 psi | 73% | 2684 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 48,095 psi | 74% | 2533 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 37,956 psi | 58% | 2431 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 92% | 43,903 psi | 68% | 2579 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 98% | 34,592 psi | 53% | 2431 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,577 psi | 82% | 2743 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,762 psi | 75% | 2556 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,837 psi | 80% | 2618 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,087 psi | 59% | 2454 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,279 psi | 67% | 2569 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 37,797 psi | 58% | 2431 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,000 psi | 58% | 2477 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,036 psi | 43% | 2238 fps | 98.1% |
| Alliant Reloder-25 | <<locked>> | 86% | 29,863 psi | 46% | 2300 fps | 95.6% |
| Alliant Reloder-26 | 50.1 gr | 80% | 29,892 psi | 46% | 2343 fps | 96.7% |
| Bofors RP15 | <<locked>> | 90% | 37,521 psi | 58% | 2464 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 49,066 psi | 75% | 2566 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 39,494 psi | 61% | 2543 fps | 95.1% |
| Bofors RP5 | <<locked>> | 88% | 38,000 psi | 58% | 2477 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 43,178 psi | 66% | 2457 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 96% | 40,161 psi | 62% | 2500 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 49,269 psi | 76% | 2579 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 41,075 psi | 63% | 2490 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 80% | 43,947 psi | 68% | 2507 fps | 97.4% |
| Hodgdon H4831 | <<locked>> | 92% | 47,108 psi | 72% | 2589 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,064 psi | 71% | 2572 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,708 psi | 55% | 2352 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,911 psi | 83% | 2661 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,478 psi | 58% | 2536 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 40,045 psi | 62% | 2507 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,383 psi | 42% | 1463 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,592 psi | 84% | 2625 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,604 psi | 78% | 2562 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,721 psi | 81% | 2595 fps | 99.5% |
| IMR 4350 | <<locked>> | 80% | 38,769 psi | 60% | 2392 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,527 psi | 69% | 2484 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 37,666 psi | 58% | 2402 fps | 99.2% |
| IMR 4895 | <<locked>> | 80% | 53,185 psi | 82% | 2644 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 45,992 psi | 71% | 2533 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 92% | 42,061 psi | 65% | 2556 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 55,143 psi | 85% | 2592 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,908 psi | 78% | 2559 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,003 psi | 65% | 2438 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 40,219 psi | 62% | 2421 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 30,327 psi | 47% | 2241 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 55,143 psi | 85% | 2608 fps | 100% |
| Norma 203B | <<locked>> | 80% | 51,198 psi | 79% | 2605 fps | 100% |
| Norma 204 | <<locked>> | 80% | 38,261 psi | 59% | 2418 fps | 95.2% |
| Norma MRP | 51.1 gr | 84% | 34,664 psi | 53% | 2431 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 38,943 psi | 60% | 2441 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 80% | 51,837 psi | 80% | 2631 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 41,626 psi | 64% | 2562 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 37,884 psi | 58% | 2434 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 92% | 36,970 psi | 57% | 2448 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,920 psi | 43% | 1499 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,284 psi | 76% | 2569 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,934 psi | 71% | 2612 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,117 psi | 60% | 2467 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,782 psi | 58% | 2477 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,301 psi | 53% | 2457 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 52,736 psi | 81% | 2566 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,282 psi | 71% | 2520 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 41,959 psi | 65% | 2464 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 84% | 36,854 psi | 57% | 2411 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 43,178 psi | 66% | 2457 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,003 psi | 65% | 2438 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 50,908 psi | 78% | 2559 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,219 psi | 62% | 2421 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,543 psi | 73% | 2572 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,998 psi | 85% | 2641 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,326 psi | 73% | 2418 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,046 psi | 63% | 2385 fps | 97.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 36,506 psi | 56% | 2408 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 46,485 psi | 72% | 2516 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 45,614 psi | 70% | 2507 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 35,534 psi | 55% | 2402 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,070 psi | 54% | 2346 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 53,040 psi | 82% | 2523 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,011 psi | 82% | 2539 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,367 psi | 68% | 2448 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,306 psi | 62% | 2434 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 36,840 psi | 57% | 2379 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 51,126 psi | 79% | 2536 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,726 psi | 61% | 2441 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 31,125 psi | 48% | 2306 fps | 98.1% |
| Vihtavuori N560 | 56 gr | 92% | 46,006 psi | 71% | 2648 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 96% | 42,076 psi | 65% | 2569 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,392 psi | 61% | 2408 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,292 psi | 64% | 2493 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,860 psi | 38% | 2224 fps | 97.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 55,143 psi | 85% | 2648 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,276 psi | 60% | 2434 fps | 95.7% |
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 97 powders for 7 mm Rem. SA Ultra Mag. loaded with the .284 | 173gr | RWS H-Mantel. Alliant Reloder-26 delivers the highest muzzle velocity at 2,867 fps; across all powders the maximum-charge window runs from 1,640 fps to 2,867 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 173.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, ADI AR 2225 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, Norma MRP, Vihtavuori N560 rank at the top here: for 7 mm Rem. SA Ultra Mag. with the .284 | 173gr | RWS H-Mantel 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.