Load Specifications
Load data in caliber 7 mm Rem. SA Ultra Mag. with .284 | 165gr | Remington SP Core-Lokt bullet and 96 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% | 57,595 psi | 89% | 2657 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 58,523 psi | 90% | 2740 fps | 99.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,753 psi | 87% | 2789 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 57,798 psi | 89% | 2710 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,303 psi | 85% | 2779 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 55,274 psi | 85% | 2877 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 86% | 57,508 psi | 88% | 2746 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,028 psi | 86% | 2828 fps | 99% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,348 psi | 88% | 2881 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 36,970 psi | 57% | 2549 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,464 psi | 88% | 2874 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 58,595 psi | 90% | 2769 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,158 psi | 85% | 2740 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,796 psi | 86% | 2828 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,392 psi | 88% | 2854 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,347 psi | 85% | 2812 fps | 98.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,507 psi | 87% | 2874 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,388 psi | 82% | 2799 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,354 psi | 71% | 2740 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 57,740 psi | 89% | 2943 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,837 psi | 80% | 2802 fps | 98.5% |
| Bofors RP3 | <<locked>> | 84% | 56,028 psi | 86% | 2736 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,507 psi | 87% | 2874 fps | 99.2% |
| Bofors RP7 | <<locked>> | 90% | 58,813 psi | 90% | 2782 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,890 psi | 71% | 2677 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 84% | 56,405 psi | 87% | 2759 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,261 psi | 88% | 2831 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 88% | 56,971 psi | 88% | 2792 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 98% | 57,667 psi | 89% | 2825 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,391 psi | 87% | 2808 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,420 psi | 87% | 2759 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,769 psi | 89% | 2785 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,484 psi | 70% | 2782 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 90% | 57,667 psi | 89% | 2871 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,622 psi | 56% | 1696 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 58,073 psi | 89% | 2749 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,232 psi | 88% | 2730 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,985 psi | 86% | 2717 fps | 99.7% |
| IMR 4350 | <<locked>> | 92% | 56,304 psi | 87% | 2762 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,739 psi | 87% | 2753 fps | 99.7% |
| IMR 4831 | <<locked>> | 92% | 55,492 psi | 85% | 2769 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,594 psi | 87% | 2766 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,347 psi | 85% | 2756 fps | 97.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,781 psi | 84% | 2854 fps | 98% |
| Lovex S060 | <<locked>> | 82% | 58,479 psi | 90% | 2710 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 57,508 psi | 88% | 2723 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,043 psi | 88% | 2749 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 58,494 psi | 90% | 2795 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,442 psi | 73% | 2648 fps | 99.4% |
| Norma 201 | <<locked>> | 82% | 58,755 psi | 90% | 2730 fps | 100% |
| Norma 203B | <<locked>> | 84% | 58,291 psi | 90% | 2779 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,159 psi | 88% | 2818 fps | 99% |
| Norma MRP | <<locked>> | 98% | 56,202 psi | 86% | 2900 fps | 99.8% |
| Norma URP | <<locked>> | 92% | 57,479 psi | 88% | 2815 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,390 psi | 85% | 2756 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,187 psi | 85% | 2871 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 92% | 56,159 psi | 86% | 2818 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,385 psi | 76% | 2749 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,362 psi | 57% | 1736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,101 psi | 86% | 2743 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,739 psi | 87% | 2841 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,114 psi | 85% | 2802 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,145 psi | 88% | 2884 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,237 psi | 70% | 2772 fps | 98.9% |
| Rottweil R 902 | <<locked>> | 82% | 55,970 psi | 86% | 2687 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,173 psi | 86% | 2736 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,653 psi | 89% | 2795 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 98% | 58,523 psi | 90% | 2858 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 90% | 58,813 psi | 90% | 2782 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,043 psi | 88% | 2749 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 57,508 psi | 88% | 2723 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 58,494 psi | 90% | 2795 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,812 psi | 89% | 2795 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 58,581 psi | 90% | 2766 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,724 psi | 87% | 2615 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,652 psi | 87% | 2707 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 58,030 psi | 89% | 2851 fps | 99.3% |
| Somchem S355 | <<locked>> | 86% | 55,912 psi | 86% | 2726 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,666 psi | 86% | 2736 fps | 97.3% |
| Somchem S365 | <<locked>> | 94% | 57,087 psi | 88% | 2815 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,477 psi | 85% | 2779 fps | 99.4% |
| Vihtavuori N135 | <<locked>> | 82% | 56,231 psi | 87% | 2641 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,463 psi | 87% | 2657 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,319 psi | 88% | 2703 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,970 psi | 86% | 2759 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,476 psi | 84% | 2753 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 84% | 58,291 psi | 90% | 2703 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 58,595 psi | 90% | 2812 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,188 psi | 86% | 2828 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,333 psi | 87% | 2894 fps | 97.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,312 psi | 74% | 2749 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,288 psi | 85% | 2723 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,566 psi | 89% | 2835 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,965 psi | 75% | 2871 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 58,697 psi | 90% | 2769 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,434 psi | 85% | 2772 fps | 98.8% |
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% | 54,012 psi | 83% | 2612 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,198 psi | 79% | 2631 fps | 98.8% |
| Accurate 3100 | <<locked>> | 82% | 30,908 psi | 48% | 2313 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 51,213 psi | 79% | 2625 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,262 psi | 60% | 2513 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 94% | 47,964 psi | 74% | 2756 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 47,950 psi | 74% | 2602 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,509 psi | 62% | 2549 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 92% | 43,961 psi | 68% | 2648 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 98% | 34,766 psi | 53% | 2493 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,519 psi | 82% | 2815 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,573 psi | 75% | 2625 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,808 psi | 80% | 2690 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,145 psi | 59% | 2523 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,308 psi | 67% | 2638 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,306 psi | 62% | 2546 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,014 psi | 58% | 2543 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,065 psi | 43% | 2293 fps | 97.8% |
| Alliant Reloder-25 | <<locked>> | 86% | 29,805 psi | 46% | 2356 fps | 95.1% |
| Alliant Reloder-26 | 52.1 gr | 80% | 30,023 psi | 46% | 2405 fps | 96.3% |
| Bofors RP15 | <<locked>> | 92% | 40,016 psi | 62% | 2582 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 49,269 psi | 76% | 2641 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 38,014 psi | 58% | 2543 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 42,989 psi | 66% | 2520 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 98% | 42,960 psi | 66% | 2621 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 49,414 psi | 76% | 2654 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,176 psi | 63% | 2556 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 44,135 psi | 68% | 2575 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 92% | 47,108 psi | 72% | 2654 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,122 psi | 71% | 2638 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,810 psi | 55% | 2418 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,983 psi | 83% | 2736 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,434 psi | 58% | 2595 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 40,059 psi | 62% | 2572 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,354 psi | 42% | 1512 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,592 psi | 84% | 2700 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,459 psi | 78% | 2635 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,634 psi | 81% | 2667 fps | 99.4% |
| IMR 4350 | <<locked>> | 80% | 38,725 psi | 60% | 2454 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,541 psi | 69% | 2552 fps | 98.2% |
| IMR 4831 | <<locked>> | 80% | 37,695 psi | 58% | 2467 fps | 99% |
| IMR 4895 | <<locked>> | 80% | 53,171 psi | 82% | 2717 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 45,948 psi | 71% | 2598 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 94% | 44,962 psi | 69% | 2680 fps | 95.7% |
| Lovex S060 | <<locked>> | 80% | 54,984 psi | 85% | 2664 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,734 psi | 78% | 2628 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,061 psi | 65% | 2503 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 40,248 psi | 62% | 2487 fps | 97.5% |
| Lovex S071 | <<locked>> | 88% | 32,329 psi | 50% | 2349 fps | 95.9% |
| Norma 201 | <<locked>> | 80% | 55,230 psi | 85% | 2684 fps | 100% |
| Norma 203B | <<locked>> | 80% | 51,169 psi | 79% | 2677 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,915 psi | 63% | 2539 fps | 95.7% |
| Norma MRP | 53.1 gr | 84% | 34,708 psi | 53% | 2490 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 38,957 psi | 60% | 2503 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 80% | 51,764 psi | 80% | 2703 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 44,730 psi | 69% | 2687 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 37,739 psi | 58% | 2493 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 92% | 37,072 psi | 57% | 2510 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,862 psi | 43% | 1549 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,371 psi | 76% | 2638 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,977 psi | 71% | 2687 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,160 psi | 60% | 2533 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,768 psi | 58% | 2539 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,301 psi | 53% | 2513 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 52,591 psi | 81% | 2638 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,282 psi | 71% | 2589 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,701 psi | 69% | 2582 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 86% | 39,392 psi | 61% | 2530 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 42,989 psi | 66% | 2520 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,061 psi | 65% | 2503 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 50,734 psi | 78% | 2628 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,248 psi | 62% | 2487 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,384 psi | 73% | 2641 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,839 psi | 84% | 2713 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,297 psi | 73% | 2487 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,031 psi | 63% | 2448 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,030 psi | 60% | 2523 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 46,528 psi | 72% | 2585 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 45,890 psi | 71% | 2579 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 35,549 psi | 55% | 2467 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,114 psi | 54% | 2408 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 53,011 psi | 82% | 2598 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,011 psi | 82% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,411 psi | 68% | 2516 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,306 psi | 62% | 2503 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 36,912 psi | 57% | 2441 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 51,271 psi | 79% | 2612 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,842 psi | 61% | 2507 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 31,140 psi | 48% | 2365 fps | 97.8% |
| Vihtavuori N560 | 58.1 gr | 92% | 45,905 psi | 71% | 2713 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 98% | 44,962 psi | 69% | 2687 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,305 psi | 60% | 2470 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,176 psi | 63% | 2556 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,772 psi | 38% | 2274 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 55,143 psi | 85% | 2723 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,262 psi | 60% | 2497 fps | 95.3% |
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 96 powders for 7 mm Rem. SA Ultra Mag. loaded with the .284 | 165gr | Remington SP Core-Lokt. Alliant Reloder-26 delivers the highest muzzle velocity at 2,943 fps; across all powders the maximum-charge window runs from 1,696 fps to 2,943 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 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 165.0 gr projectile in 0.284" calls for a 1:12.5 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 | 165gr | Remington SP Core-Lokt 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.