Load Specifications
Load data in caliber 7-6.5 PRCW with .284 | 175gr | Barnes X S 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, Accurate High Country and ReloadSwiss RS 70.
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
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 84% | 58,305 psi | 90% | 2595 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,550 psi | 87% | 2648 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 55,767 psi | 86% | 2546 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,259 psi | 85% | 2641 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 56,811 psi | 87% | 2782 fps | 98.3% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 57,754 psi | 89% | 2779 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 86% | 57,188 psi | 88% | 2602 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,230 psi | 85% | 2677 fps | 98.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,289 psi | 87% | 2723 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,260 psi | 57% | 2431 fps | 96.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,492 psi | 87% | 2723 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 58,610 psi | 90% | 2723 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 58,610 psi | 90% | 2723 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 58,392 psi | 90% | 2625 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 58,668 psi | 90% | 2648 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 58,668 psi | 90% | 2730 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,420 psi | 87% | 2707 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,856 psi | 89% | 2713 fps | 99.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,419 psi | 85% | 2726 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,794 psi | 81% | 2664 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,021 psi | 71% | 2605 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,188 psi | 86% | 2795 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,981 psi | 78% | 2657 fps | 98.2% |
| Bofors RP3 | <<locked>> | 84% | 56,391 psi | 87% | 2605 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,419 psi | 85% | 2726 fps | 98.9% |
| Bofors RP7 | <<locked>> | 90% | 58,465 psi | 90% | 2635 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,876 psi | 71% | 2543 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 84% | 56,391 psi | 87% | 2618 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 56,608 psi | 87% | 2684 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 88% | 56,376 psi | 87% | 2644 fps | 99% |
| Hodgdon H4831 | <<locked>> | 98% | 56,594 psi | 87% | 2674 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,361 psi | 85% | 2654 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,550 psi | 85% | 2612 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,217 psi | 88% | 2644 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,107 psi | 69% | 2638 fps | 97.7% |
| Hodgdon Superformance | <<locked>> | 90% | 56,434 psi | 87% | 2720 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,970 psi | 57% | 1594 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,769 psi | 89% | 2605 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,985 psi | 88% | 2589 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,985 psi | 86% | 2575 fps | 99.6% |
| IMR 4350 | <<locked>> | 92% | 55,608 psi | 86% | 2618 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,463 psi | 87% | 2608 fps | 99.6% |
| IMR 4831 | <<locked>> | 92% | 55,390 psi | 85% | 2631 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,623 psi | 87% | 2628 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 58,189 psi | 90% | 2661 fps | 97.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,041 psi | 83% | 2703 fps | 97.6% |
| Lovex S060 | <<locked>> | 82% | 58,146 psi | 89% | 2566 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 57,711 psi | 89% | 2585 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,072 psi | 88% | 2612 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 58,392 psi | 90% | 2654 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,776 psi | 74% | 2523 fps | 99.4% |
| Norma 203B | <<locked>> | 84% | 58,015 psi | 89% | 2638 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,275 psi | 87% | 2667 fps | 98.7% |
| Norma MRP | <<locked>> | 98% | 54,882 psi | 84% | 2749 fps | 99.7% |
| Norma URP | <<locked>> | 92% | 56,985 psi | 88% | 2671 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 58,711 psi | 90% | 2664 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,230 psi | 83% | 2717 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 55,376 psi | 85% | 2674 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,762 psi | 75% | 2605 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,623 psi | 58% | 1634 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,912 psi | 86% | 2602 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,680 psi | 86% | 2697 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 58,247 psi | 90% | 2710 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,999 psi | 86% | 2733 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,005 psi | 69% | 2635 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 82% | 56,289 psi | 87% | 2549 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,507 psi | 87% | 2602 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,797 psi | 87% | 2644 fps | 98% |
| Rottweil R 905 | <<locked>> | 98% | 57,348 psi | 88% | 2703 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 90% | 58,465 psi | 90% | 2635 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,072 psi | 88% | 2612 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 57,711 psi | 89% | 2585 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 58,392 psi | 90% | 2654 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,217 psi | 88% | 2651 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 58,262 psi | 90% | 2621 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,811 psi | 87% | 2484 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,478 psi | 87% | 2566 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,855 psi | 88% | 2697 fps | 99% |
| Somchem S355 | <<locked>> | 86% | 56,231 psi | 87% | 2595 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 58,610 psi | 90% | 2641 fps | 97.5% |
| Somchem S365 | <<locked>> | 94% | 56,217 psi | 87% | 2671 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 58,363 psi | 90% | 2684 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 82% | 56,565 psi | 87% | 2507 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,289 psi | 87% | 2520 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,985 psi | 88% | 2566 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,376 psi | 85% | 2615 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,766 psi | 83% | 2608 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 84% | 58,102 psi | 89% | 2566 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 58,160 psi | 90% | 2671 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,593 psi | 86% | 2687 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,114 psi | 85% | 2736 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,877 psi | 74% | 2615 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 58,218 psi | 90% | 2628 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,971 psi | 88% | 2690 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,964 psi | 74% | 2730 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 58,349 psi | 90% | 2628 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 58,363 psi | 90% | 2677 fps | 99% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 80% | 51,445 psi | 79% | 2497 fps | 98.7% |
| Accurate 3100 | <<locked>> | 80% | 30,501 psi | 47% | 2182 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 52,518 psi | 81% | 2500 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,306 psi | 62% | 2405 fps | 99.3% |
| Accurate High Country | 50.6 gr | 90% | 43,787 psi | 67% | 2566 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 94% | 47,485 psi | 73% | 2618 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 48,167 psi | 74% | 2470 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,654 psi | 63% | 2425 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 94% | 46,586 psi | 72% | 2562 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 98% | 35,201 psi | 54% | 2379 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,040 psi | 82% | 2674 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 40,930 psi | 63% | 2428 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 40,930 psi | 63% | 2428 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,921 psi | 75% | 2493 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,025 psi | 80% | 2556 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,493 psi | 59% | 2402 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,526 psi | 67% | 2513 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,553 psi | 62% | 2425 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,421 psi | 59% | 2425 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,182 psi | 45% | 2205 fps | 98.2% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,748 psi | 47% | 2257 fps | 95.4% |
| Alliant Reloder-26 | 46.4 gr | 80% | 31,082 psi | 48% | 2313 fps | 96.7% |
| Bofors RP15 | <<locked>> | 92% | 40,350 psi | 62% | 2464 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 49,792 psi | 77% | 2513 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 38,421 psi | 59% | 2425 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 43,598 psi | 67% | 2398 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 98% | 43,076 psi | 66% | 2490 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 49,864 psi | 77% | 2523 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,626 psi | 64% | 2438 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 44,193 psi | 68% | 2444 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 46,876 psi | 72% | 2520 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,704 psi | 75% | 2552 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,303 psi | 56% | 2306 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,853 psi | 83% | 2598 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,942 psi | 58% | 2477 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 40,277 psi | 62% | 2448 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,644 psi | 43% | 1421 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,331 psi | 84% | 2559 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,662 psi | 78% | 2500 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,750 psi | 81% | 2526 fps | 99.3% |
| IMR 4350 | <<locked>> | 80% | 39,146 psi | 60% | 2336 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,614 psi | 69% | 2421 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 38,624 psi | 59% | 2359 fps | 99.1% |
| IMR 4895 | <<locked>> | 80% | 53,287 psi | 82% | 2579 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 45,934 psi | 71% | 2467 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 94% | 44,730 psi | 69% | 2543 fps | 95.3% |
| Lovex S060 | <<locked>> | 80% | 55,071 psi | 85% | 2526 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 51,387 psi | 79% | 2500 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,801 psi | 66% | 2385 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 41,205 psi | 63% | 2375 fps | 97.6% |
| Lovex S071 | <<locked>> | 86% | 31,879 psi | 49% | 2218 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 51,401 psi | 79% | 2546 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,176 psi | 63% | 2415 fps | 95.6% |
| Norma MRP | <<locked>> | 84% | 35,375 psi | 54% | 2385 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 39,624 psi | 61% | 2392 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 80% | 51,692 psi | 80% | 2569 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 44,643 psi | 69% | 2552 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 38,130 psi | 59% | 2379 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 92% | 37,536 psi | 58% | 2395 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,282 psi | 44% | 1457 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,574 psi | 76% | 2507 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,021 psi | 71% | 2556 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,595 psi | 61% | 2418 fps | 99% |
| ReloadSwiss RS 70 | 46 gr | 80% | 38,290 psi | 59% | 2425 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,012 psi | 54% | 2405 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 53,229 psi | 82% | 2507 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,224 psi | 73% | 2467 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,831 psi | 69% | 2454 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 86% | 39,653 psi | 61% | 2408 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 43,598 psi | 67% | 2398 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,801 psi | 66% | 2385 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 51,387 psi | 79% | 2500 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,205 psi | 63% | 2375 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,340 psi | 73% | 2510 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,578 psi | 84% | 2572 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,572 psi | 73% | 2362 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,814 psi | 64% | 2333 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,276 psi | 60% | 2405 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 47,152 psi | 73% | 2464 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,747 psi | 75% | 2497 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 36,158 psi | 56% | 2359 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,998 psi | 55% | 2303 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 53,388 psi | 82% | 2467 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,229 psi | 82% | 2484 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,034 psi | 69% | 2398 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,727 psi | 63% | 2382 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 37,463 psi | 58% | 2329 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 51,547 psi | 79% | 2484 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,495 psi | 62% | 2392 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 32,343 psi | 50% | 2277 fps | 98.2% |
| Vihtavuori N560 | <<locked>> | 92% | 45,788 psi | 70% | 2579 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 98% | 44,947 psi | 69% | 2562 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,639 psi | 61% | 2352 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,626 psi | 64% | 2438 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,121 psi | 40% | 2201 fps | 97.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 54,969 psi | 85% | 2582 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,479 psi | 61% | 2375 fps | 95.2% |
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 7-6.5 PRCW loaded with the .284 | 175gr | Barnes X S. Alliant Reloder-26 delivers the highest muzzle velocity at 2,795 fps; across all powders the maximum-charge window runs from 1,594 fps to 2,795 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 57–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.284" calls for a 1:9.5 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, Accurate High Country, ReloadSwiss RS 70 rank at the top here: for 7-6.5 PRCW with the .284 | 175gr | Barnes X S 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.