Load Specifications
Load data in caliber 7-6.5 PRCW with .284 | 175gr | Speer Grand Slam bullet and 98 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 Alliant Reloder-17.
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
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 56,797 psi | 87% | 2546 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,682 psi | 89% | 2625 fps | 99.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,608 psi | 86% | 2671 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 57,203 psi | 88% | 2602 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 58,102 psi | 89% | 2713 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 57,856 psi | 89% | 2815 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 86% | 56,826 psi | 87% | 2631 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,201 psi | 85% | 2713 fps | 99% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,463 psi | 87% | 2762 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 36,347 psi | 56% | 2448 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,405 psi | 87% | 2753 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,957 psi | 89% | 2654 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 58,015 psi | 89% | 2674 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 58,537 psi | 90% | 2762 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,449 psi | 87% | 2736 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 58,030 psi | 89% | 2749 fps | 99.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,521 psi | 85% | 2759 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,388 psi | 81% | 2687 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,440 psi | 70% | 2628 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,362 psi | 87% | 2822 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,749 psi | 78% | 2687 fps | 98.4% |
| Bofors RP3 | <<locked>> | 84% | 55,390 psi | 85% | 2628 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,521 psi | 85% | 2759 fps | 99.2% |
| Bofors RP7 | <<locked>> | 90% | 58,001 psi | 89% | 2664 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,194 psi | 70% | 2572 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 84% | 55,622 psi | 86% | 2644 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 56,449 psi | 87% | 2717 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 88% | 56,202 psi | 86% | 2677 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 98% | 56,623 psi | 87% | 2710 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,317 psi | 85% | 2690 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,448 psi | 85% | 2644 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,942 psi | 88% | 2674 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,701 psi | 69% | 2667 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 90% | 56,507 psi | 87% | 2753 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,622 psi | 56% | 1617 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,217 psi | 88% | 2631 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,362 psi | 87% | 2615 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,593 psi | 86% | 2608 fps | 99.7% |
| IMR 4350 | <<locked>> | 92% | 55,506 psi | 85% | 2651 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,072 psi | 86% | 2641 fps | 99.7% |
| IMR 4831 | <<locked>> | 94% | 58,378 psi | 90% | 2703 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,028 psi | 86% | 2654 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 58,030 psi | 89% | 2694 fps | 98% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,766 psi | 83% | 2736 fps | 97.9% |
| Lovex S060 | <<locked>> | 82% | 57,769 psi | 89% | 2598 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 56,623 psi | 87% | 2608 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,173 psi | 86% | 2638 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 57,566 psi | 89% | 2680 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,557 psi | 72% | 2543 fps | 99.4% |
| Norma 201 | <<locked>> | 82% | 58,088 psi | 89% | 2618 fps | 100% |
| Norma 202 | <<locked>> | 82% | 58,653 psi | 90% | 2608 fps | 100% |
| Norma 203B | <<locked>> | 84% | 57,290 psi | 88% | 2661 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,304 psi | 87% | 2703 fps | 99% |
| Norma MRP | <<locked>> | 98% | 54,897 psi | 84% | 2779 fps | 99.8% |
| Norma URP | <<locked>> | 92% | 56,478 psi | 87% | 2697 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 58,494 psi | 90% | 2694 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,099 psi | 83% | 2753 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 92% | 55,259 psi | 85% | 2703 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,385 psi | 74% | 2635 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,420 psi | 58% | 1660 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,492 psi | 85% | 2631 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,898 psi | 86% | 2726 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 57,870 psi | 89% | 2740 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,217 psi | 87% | 2766 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,469 psi | 68% | 2661 fps | 98.9% |
| Rottweil R 902 | <<locked>> | 84% | 58,610 psi | 90% | 2615 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,245 psi | 85% | 2621 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,797 psi | 87% | 2680 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 98% | 57,493 psi | 88% | 2740 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 90% | 58,001 psi | 89% | 2664 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,173 psi | 86% | 2638 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 56,623 psi | 87% | 2608 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,566 psi | 89% | 2680 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,956 psi | 88% | 2680 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,682 psi | 89% | 2648 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,173 psi | 86% | 2507 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,043 psi | 86% | 2595 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,000 psi | 88% | 2733 fps | 99.3% |
| Somchem S335 | <<locked>> | 82% | 58,421 psi | 90% | 2543 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 58,697 psi | 90% | 2661 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 58,465 psi | 90% | 2677 fps | 97.9% |
| Somchem S365 | <<locked>> | 94% | 55,927 psi | 86% | 2697 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,943 psi | 89% | 2713 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 82% | 55,854 psi | 86% | 2533 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,840 psi | 86% | 2546 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,623 psi | 87% | 2592 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 58,726 psi | 90% | 2690 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,461 psi | 82% | 2638 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 84% | 57,508 psi | 89% | 2592 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 57,609 psi | 89% | 2697 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 58,566 psi | 90% | 2756 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,201 psi | 85% | 2772 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,239 psi | 73% | 2635 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 58,363 psi | 90% | 2661 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,449 psi | 87% | 2717 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,529 psi | 73% | 2753 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,899 psi | 89% | 2654 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 58,102 psi | 89% | 2710 fps | 99.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 53,345 psi | 82% | 2503 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,575 psi | 78% | 2523 fps | 98.8% |
| Accurate 3100 | <<locked>> | 82% | 30,472 psi | 47% | 2221 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 50,589 psi | 78% | 2516 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,798 psi | 60% | 2411 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 94% | 46,949 psi | 72% | 2641 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 47,398 psi | 73% | 2493 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 39,871 psi | 61% | 2444 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 92% | 43,366 psi | 67% | 2539 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 98% | 34,040 psi | 52% | 2388 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,620 psi | 81% | 2700 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,051 psi | 74% | 2516 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,401 psi | 79% | 2582 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,637 psi | 58% | 2418 fps | 99.4% |
| Alliant Reloder-17 | 47.8 gr | 80% | 42,685 psi | 66% | 2533 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 39,682 psi | 61% | 2441 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 37,376 psi | 58% | 2438 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,688 psi | 43% | 2201 fps | 97.9% |
| Alliant Reloder-25 | <<locked>> | 86% | 29,341 psi | 45% | 2260 fps | 95.2% |
| Alliant Reloder-26 | 49 gr | 80% | 29,472 psi | 45% | 2306 fps | 96.3% |
| Bofors RP15 | <<locked>> | 92% | 39,233 psi | 60% | 2477 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 48,588 psi | 75% | 2533 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 37,376 psi | 58% | 2438 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 42,554 psi | 65% | 2418 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 98% | 42,409 psi | 65% | 2516 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 48,921 psi | 75% | 2546 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 40,466 psi | 62% | 2451 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 80% | 43,598 psi | 67% | 2470 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 92% | 46,253 psi | 71% | 2546 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 45,455 psi | 70% | 2533 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,215 psi | 54% | 2320 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,258 psi | 82% | 2625 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 36,782 psi | 57% | 2490 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 39,407 psi | 61% | 2464 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,485 psi | 42% | 1447 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,896 psi | 83% | 2589 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,850 psi | 77% | 2523 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,069 psi | 80% | 2556 fps | 99.4% |
| IMR 4350 | <<locked>> | 80% | 38,174 psi | 59% | 2352 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,903 psi | 68% | 2444 fps | 98.2% |
| IMR 4831 | <<locked>> | 80% | 37,260 psi | 57% | 2369 fps | 99.1% |
| IMR 4895 | <<locked>> | 80% | 52,750 psi | 81% | 2608 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 45,368 psi | 70% | 2493 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 94% | 44,222 psi | 68% | 2569 fps | 95.7% |
| Lovex S060 | <<locked>> | 80% | 54,418 psi | 84% | 2552 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,140 psi | 77% | 2520 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,582 psi | 64% | 2402 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 39,842 psi | 61% | 2388 fps | 97.6% |
| Lovex S071 | <<locked>> | 86% | 29,762 psi | 46% | 2201 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 54,650 psi | 84% | 2572 fps | 100% |
| Norma 202 | <<locked>> | 80% | 55,187 psi | 85% | 2566 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,763 psi | 78% | 2569 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,190 psi | 62% | 2431 fps | 95.7% |
| Norma MRP | <<locked>> | 84% | 34,026 psi | 52% | 2388 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 38,508 psi | 59% | 2405 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 80% | 50,908 psi | 78% | 2592 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 43,903 psi | 68% | 2579 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 37,101 psi | 57% | 2392 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 92% | 36,332 psi | 56% | 2405 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,804 psi | 43% | 1476 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,718 psi | 75% | 2530 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,310 psi | 70% | 2575 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,319 psi | 59% | 2425 fps | 99% |
| ReloadSwiss RS 70 | 48.5 gr | 80% | 37,101 psi | 57% | 2434 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 33,765 psi | 52% | 2415 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 51,924 psi | 80% | 2526 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,774 psi | 70% | 2484 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 41,481 psi | 64% | 2428 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 38,696 psi | 60% | 2425 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 42,554 psi | 65% | 2418 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,582 psi | 64% | 2402 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 50,140 psi | 77% | 2520 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,842 psi | 61% | 2388 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,659 psi | 72% | 2533 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,070 psi | 83% | 2598 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,847 psi | 72% | 2385 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,683 psi | 63% | 2352 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 38,363 psi | 59% | 2421 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 55,071 psi | 85% | 2503 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 46,006 psi | 71% | 2480 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 45,092 psi | 69% | 2470 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 34,882 psi | 54% | 2365 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 34,548 psi | 53% | 2310 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 52,446 psi | 81% | 2490 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,562 psi | 81% | 2507 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,947 psi | 68% | 2415 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,914 psi | 61% | 2402 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 36,201 psi | 56% | 2339 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 50,778 psi | 78% | 2503 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,334 psi | 61% | 2405 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 30,647 psi | 47% | 2270 fps | 97.9% |
| Vihtavuori N560 | <<locked>> | 92% | 45,223 psi | 70% | 2605 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 98% | 44,048 psi | 68% | 2579 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,754 psi | 60% | 2372 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 40,683 psi | 63% | 2454 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,352 psi | 37% | 2182 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 80% | 54,230 psi | 83% | 2608 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 38,682 psi | 60% | 2395 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 98 powders for 7-6.5 PRCW loaded with the .284 | 175gr | Speer Grand Slam. Alliant Reloder-26 delivers the highest muzzle velocity at 2,822 fps; across all powders the maximum-charge window runs from 1,617 fps to 2,822 fps. Accurate 3100 gives the best case fill at 100 %, and 98 of the 98 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 175.0 gr projectile in 0.284" calls for a 1:12.0 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, Alliant Reloder-17 rank at the top here: for 7-6.5 PRCW with the .284 | 175gr | Speer Grand Slam 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.