Load Specifications
Load data in caliber 7 mm Rem. SA Ultra Mag. with .284 | 180gr | Sierra MatchKing bullet and 94 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.
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% | 58,233 psi | 90% | 2533 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 55,216 psi | 85% | 2566 fps | 99.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,290 psi | 88% | 2667 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 58,639 psi | 90% | 2585 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,738 psi | 86% | 2654 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 55,666 psi | 86% | 2759 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 86% | 58,088 psi | 89% | 2621 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,681 psi | 87% | 2707 fps | 99.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,986 psi | 89% | 2762 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,159 psi | 57% | 2451 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,928 psi | 89% | 2743 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,564 psi | 85% | 2595 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,898 psi | 86% | 2618 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,463 psi | 87% | 2703 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 58,117 psi | 89% | 2726 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,028 psi | 86% | 2697 fps | 99.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,188 psi | 88% | 2756 fps | 99.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,070 psi | 83% | 2677 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,746 psi | 72% | 2628 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 58,363 psi | 90% | 2818 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 56,579 psi | 87% | 2667 fps | 95.8% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,228 psi | 80% | 2684 fps | 99% |
| Bofors RP3 | <<locked>> | 84% | 56,478 psi | 87% | 2612 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 42,641 psi | 66% | 2556 fps | 96.6% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,188 psi | 88% | 2756 fps | 99.6% |
| Bofors RP7 | <<locked>> | 88% | 55,825 psi | 86% | 2608 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,412 psi | 71% | 2575 fps | 97.5% |
| Hodgdon H380 | <<locked>> | 84% | 56,956 psi | 88% | 2635 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,885 psi | 89% | 2710 fps | 100% |
| Hodgdon H4350 | <<locked>> | 88% | 57,232 psi | 88% | 2664 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 98% | 58,131 psi | 89% | 2703 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,782 psi | 87% | 2687 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,000 psi | 88% | 2631 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 58,334 psi | 90% | 2661 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,774 psi | 70% | 2671 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 90% | 58,160 psi | 89% | 2749 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,651 psi | 56% | 1601 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 58,479 psi | 90% | 2618 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,595 psi | 89% | 2602 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,449 psi | 87% | 2595 fps | 99.9% |
| IMR 4350 | <<locked>> | 92% | 56,811 psi | 87% | 2641 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,305 psi | 88% | 2631 fps | 99.9% |
| IMR 4831 | <<locked>> | 92% | 56,028 psi | 86% | 2644 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,363 psi | 88% | 2641 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,927 psi | 86% | 2638 fps | 98.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,288 psi | 85% | 2736 fps | 98.6% |
| Lovex S062 | <<locked>> | 84% | 57,885 psi | 89% | 2595 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,464 psi | 88% | 2625 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 55,550 psi | 85% | 2625 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,732 psi | 73% | 2533 fps | 99.7% |
| Norma 203B | <<locked>> | 84% | 58,668 psi | 90% | 2651 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,725 psi | 89% | 2697 fps | 99.4% |
| Norma MRP | <<locked>> | 98% | 56,666 psi | 87% | 2779 fps | 100% |
| Norma URP | <<locked>> | 92% | 57,957 psi | 89% | 2687 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,782 psi | 86% | 2628 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,753 psi | 86% | 2753 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 92% | 56,753 psi | 87% | 2697 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,821 psi | 77% | 2638 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,463 psi | 58% | 1640 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,449 psi | 87% | 2618 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,580 psi | 89% | 2713 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,622 psi | 86% | 2680 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,798 psi | 89% | 2759 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,818 psi | 70% | 2667 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 82% | 56,405 psi | 87% | 2559 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,652 psi | 87% | 2608 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 58,204 psi | 90% | 2677 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 96% | 55,114 psi | 85% | 2680 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 88% | 55,825 psi | 86% | 2608 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,464 psi | 88% | 2625 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 57,885 psi | 89% | 2595 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,550 psi | 85% | 2625 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 58,407 psi | 90% | 2667 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,348 psi | 88% | 2493 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,927 psi | 88% | 2582 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 58,581 psi | 90% | 2730 fps | 99.6% |
| Somchem S355 | <<locked>> | 86% | 56,565 psi | 87% | 2605 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,130 psi | 86% | 2621 fps | 97.9% |
| Somchem S365 | <<locked>> | 94% | 57,566 psi | 89% | 2687 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,985 psi | 86% | 2661 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 82% | 56,826 psi | 87% | 2513 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,072 psi | 88% | 2533 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,624 psi | 89% | 2575 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,318 psi | 87% | 2631 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,969 psi | 85% | 2635 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 84% | 58,755 psi | 90% | 2579 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,637 psi | 86% | 2641 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,637 psi | 87% | 2700 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,768 psi | 87% | 2769 fps | 98.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,791 psi | 75% | 2638 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,738 psi | 86% | 2598 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,885 psi | 89% | 2710 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,661 psi | 76% | 2749 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,985 psi | 86% | 2654 fps | 99.3% |
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% | 54,389 psi | 84% | 2487 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,735 psi | 80% | 2516 fps | 99.2% |
| Accurate 3100 | <<locked>> | 80% | 29,327 psi | 45% | 2172 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 51,619 psi | 79% | 2500 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,755 psi | 61% | 2405 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 45,165 psi | 69% | 2585 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 48,472 psi | 75% | 2484 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 38,435 psi | 59% | 2392 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 90% | 41,568 psi | 64% | 2484 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 96% | 32,982 psi | 51% | 2346 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 54,041 psi | 83% | 2690 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,211 psi | 76% | 2507 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,315 psi | 80% | 2569 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,464 psi | 59% | 2411 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,918 psi | 68% | 2526 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,101 psi | 59% | 2388 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 35,940 psi | 55% | 2382 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,340 psi | 44% | 2201 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 28,384 psi | 44% | 2215 fps | 95.3% |
| Alliant Reloder-26 | 49.1 gr | 80% | 30,429 psi | 47% | 2313 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 53,243 psi | 82% | 2615 fps | 95% |
| Bofors RP15 | <<locked>> | 90% | 37,985 psi | 58% | 2428 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 49,588 psi | 76% | 2516 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 40,016 psi | 62% | 2507 fps | 95.8% |
| Bofors RP5 | <<locked>> | 86% | 35,940 psi | 55% | 2382 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 43,526 psi | 67% | 2415 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 96% | 40,625 psi | 63% | 2464 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 49,806 psi | 77% | 2533 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 41,597 psi | 64% | 2448 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 44,425 psi | 68% | 2464 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 90% | 44,353 psi | 68% | 2490 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 43,613 psi | 67% | 2477 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,056 psi | 55% | 2310 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 54,607 psi | 84% | 2612 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 35,621 psi | 55% | 2444 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 40,509 psi | 62% | 2467 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 42% | 1430 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 55,056 psi | 85% | 2572 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,966 psi | 78% | 2513 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,200 psi | 82% | 2546 fps | 99.7% |
| IMR 4350 | <<locked>> | 80% | 39,146 psi | 60% | 2352 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,889 psi | 69% | 2438 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 38,101 psi | 59% | 2359 fps | 99.4% |
| IMR 4895 | <<locked>> | 80% | 53,693 psi | 83% | 2592 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 43,526 psi | 67% | 2438 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 92% | 42,424 psi | 65% | 2516 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 51,285 psi | 79% | 2507 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,351 psi | 65% | 2392 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 40,640 psi | 63% | 2382 fps | 98.2% |
| Lovex S071 | <<locked>> | 84% | 28,805 psi | 44% | 2159 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 51,677 psi | 80% | 2556 fps | 100% |
| Norma 204 | <<locked>> | 80% | 38,508 psi | 59% | 2375 fps | 95.7% |
| Norma MRP | 48.8 gr | 82% | 32,750 psi | 50% | 2336 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 39,334 psi | 61% | 2398 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 80% | 52,243 psi | 80% | 2582 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 39,247 psi | 60% | 2464 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 38,159 psi | 59% | 2388 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 90% | 34,911 psi | 54% | 2356 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 43% | 1467 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,850 psi | 77% | 2523 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,644 psi | 72% | 2569 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,479 psi | 61% | 2425 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,130 psi | 59% | 2434 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 32,343 psi | 50% | 2359 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 53,098 psi | 82% | 2516 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,717 psi | 72% | 2470 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,525 psi | 65% | 2428 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 84% | 37,159 psi | 57% | 2369 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 43,526 psi | 67% | 2415 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,351 psi | 65% | 2392 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 51,285 psi | 79% | 2507 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,640 psi | 63% | 2382 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,848 psi | 74% | 2523 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,906 psi | 74% | 2372 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,437 psi | 64% | 2343 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 36,811 psi | 57% | 2365 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 46,876 psi | 72% | 2467 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 43,337 psi | 67% | 2418 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 36,042 psi | 55% | 2362 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 33,185 psi | 51% | 2257 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 53,693 psi | 83% | 2477 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,447 psi | 82% | 2487 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,788 psi | 69% | 2402 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,770 psi | 63% | 2392 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 34,998 psi | 54% | 2293 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 51,663 psi | 79% | 2487 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,176 psi | 62% | 2398 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 31,502 psi | 48% | 2270 fps | 98.5% |
| Vihtavuori N560 | 53.6 gr | 90% | 43,497 psi | 67% | 2549 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 96% | 42,482 psi | 65% | 2526 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,740 psi | 61% | 2365 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,829 psi | 64% | 2451 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,048 psi | 39% | 2192 fps | 98.1% |
| Winchester Supreme 780 | <<locked>> | 86% | 37,086 psi | 57% | 2343 fps | 95.4% |
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 94 powders for 7 mm Rem. SA Ultra Mag. loaded with the .284 | 180gr | Sierra MatchKing. Alliant Reloder-26 delivers the highest muzzle velocity at 2,818 fps; across all powders the maximum-charge window runs from 1,601 fps to 2,818 fps. Accurate 3100 gives the best case fill at 100 %, and 94 of the 94 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 180.0 gr projectile in 0.284" calls for a 1:10.0 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 | 180gr | Sierra MatchKing 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.