Load Specifications
Load data in caliber 7 x 64 Brenneke with .284 | 160gr | Peregrine VRG-3 bullet and 98 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-16 and Hodgdon Superformance.
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>> | 86% | 54,389 psi | 90% | 2615 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,490 psi | 89% | 2631 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,223 psi | 75% | 2595 fps | 98.1% |
| Accurate 4064 | <<locked>> | 86% | 51,256 psi | 85% | 2618 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 51,242 psi | 85% | 2707 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 82% | 51,547 psi | 86% | 2648 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 52,707 psi | 88% | 2654 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,084 psi | 88% | 2743 fps | 97.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,824 psi | 89% | 2648 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 51,010 psi | 85% | 2759 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 52,852 psi | 88% | 2674 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,258 psi | 88% | 2694 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 52,837 psi | 88% | 2766 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,940 psi | 90% | 2795 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,083 psi | 87% | 2733 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,047 psi | 72% | 2625 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,608 psi | 62% | 2526 fps | 96.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,617 psi | 81% | 2795 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 51,213 psi | 85% | 2664 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 53,403 psi | 89% | 2687 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 53,359 psi | 89% | 2667 fps | 98.2% |
| Hodgdon BL-C2 | <<locked>> | 82% | 53,171 psi | 88% | 2674 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,172 psi | 90% | 2703 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 94% | 54,085 psi | 90% | 2759 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 90% | 51,126 psi | 85% | 2671 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 82% | 52,127 psi | 87% | 2657 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 52,779 psi | 88% | 2697 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 51,648 psi | 86% | 2687 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 50,676 psi | 84% | 2740 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,897 psi | 60% | 1647 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,243 psi | 88% | 2661 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 52,272 psi | 87% | 2638 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 52,257 psi | 87% | 2638 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 51,822 psi | 86% | 2618 fps | 98.4% |
| IMR 4350 | <<locked>> | 96% | 53,795 psi | 89% | 2697 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 52,083 psi | 87% | 2648 fps | 98.3% |
| IMR 4831 | <<locked>> | 96% | 52,185 psi | 87% | 2703 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 51,111 psi | 85% | 2667 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,824 psi | 89% | 2648 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 51,198 psi | 85% | 2621 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,099 psi | 90% | 2625 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 52,127 psi | 87% | 2631 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 51,343 psi | 85% | 2641 fps | 99.2% |
| Lovex S070 | <<locked>> | 94% | 52,301 psi | 87% | 2677 fps | 98.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,347 psi | 62% | 2448 fps | 96.1% |
| Norma 201 | <<locked>> | 84% | 53,548 psi | 89% | 2644 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,172 psi | 90% | 2641 fps | 100% |
| Norma 203B | <<locked>> | 86% | 52,489 psi | 87% | 2680 fps | 100% |
| Norma 204 | <<locked>> | 94% | 50,966 psi | 85% | 2690 fps | 96.7% |
| Norma MRPᴾ | <<locked>> | 100% | 48,138 psi | 80% | 2746 fps | 97.9% |
| Norma URP | <<locked>> | 96% | 53,969 psi | 90% | 2746 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 53,142 psi | 88% | 2707 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 53,026 psi | 88% | 2749 fps | 99.2% |
| Ramshot TAC | <<locked>> | 82% | 53,867 psi | 89% | 2671 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,838 psi | 89% | 2687 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,303 psi | 60% | 1683 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,186 psi | 90% | 2687 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,911 psi | 90% | 2759 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 53,664 psi | 89% | 2792 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 51,111 psi | 85% | 2730 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,969 psi | 90% | 2812 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 54,230 psi | 90% | 2618 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,157 psi | 90% | 2644 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 53,229 psi | 88% | 2680 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,937 psi | 85% | 2717 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 92% | 53,359 psi | 89% | 2667 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 51,343 psi | 85% | 2641 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 82% | 51,198 psi | 85% | 2621 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 52,127 psi | 87% | 2631 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 52,301 psi | 87% | 2677 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 51,648 psi | 86% | 2694 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 52,185 psi | 87% | 2648 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,359 psi | 89% | 2671 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 51,488 psi | 86% | 2536 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 52,011 psi | 86% | 2539 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 51,256 psi | 85% | 2595 fps | 98.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,459 psi | 84% | 2710 fps | 97% |
| Somchem S335 | <<locked>> | 84% | 54,360 psi | 90% | 2579 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 52,127 psi | 87% | 2638 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 53,577 psi | 89% | 2680 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 52,562 psi | 87% | 2749 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,677 psi | 86% | 2697 fps | 97.9% |
| Vihtavuori N133 | <<locked>> | 82% | 51,996 psi | 86% | 2523 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,070 psi | 90% | 2605 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 51,561 psi | 86% | 2579 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 51,517 psi | 86% | 2612 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 52,823 psi | 88% | 2694 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 44,411 psi | 74% | 2562 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 82% | 54,317 psi | 90% | 2648 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 52,895 psi | 88% | 2621 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 51,895 psi | 86% | 2700 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,790 psi | 79% | 2694 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 52,721 psi | 88% | 2671 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,418 psi | 90% | 2694 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,389 psi | 90% | 2762 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,551 psi | 64% | 2654 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,359 psi | 89% | 2680 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 48,385 psi | 80% | 2631 fps | 96.1% |
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% | 44,643 psi | 74% | 2480 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,845 psi | 73% | 2474 fps | 96% |
| Accurate 3100 | <<locked>> | 92% | 34,258 psi | 57% | 2382 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 42,264 psi | 70% | 2480 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,285 psi | 52% | 2323 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 48,254 psi | 80% | 2595 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 41,104 psi | 68% | 2457 fps | 99% |
| ADI AR 2209 | <<locked>> | 96% | 46,572 psi | 77% | 2635 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,401 psi | 84% | 2598 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,483 psi | 74% | 2648 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,843 psi | 68% | 2477 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,830 psi | 73% | 2539 fps | 99.5% |
| Alliant Reloder-16 | 41.3 gr | 80% | 31,647 psi | 53% | 2343 fps | 96% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,476 psi | 59% | 2464 fps | 98.9% |
| Alliant Reloder-19 | <<locked>> | 96% | 45,832 psi | 76% | 2625 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,456 psi | 46% | 2257 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 98% | 35,433 psi | 59% | 2474 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 88% | 31,575 psi | 52% | 2425 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,674 psi | 79% | 2608 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 40,698 psi | 68% | 2484 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 41,350 psi | 69% | 2461 fps | 95.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,734 psi | 83% | 2625 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,292 psi | 69% | 2487 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 84% | 38,682 psi | 64% | 2487 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 86% | 45,020 psi | 75% | 2566 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 48,733 psi | 81% | 2605 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,008 psi | 48% | 2247 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,063 psi | 75% | 2585 fps | 100% |
| Hodgdon Superformance | 50.6 gr | 86% | 40,886 psi | 68% | 2556 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,658 psi | 44% | 1467 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,876 psi | 78% | 2562 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 49,008 psi | 81% | 2592 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,207 psi | 72% | 2490 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,440 psi | 75% | 2513 fps | 97.2% |
| IMR 4350 | <<locked>> | 88% | 41,814 psi | 69% | 2490 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,567 psi | 67% | 2444 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 30,443 psi | 51% | 2287 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 44,918 psi | 75% | 2569 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 50,401 psi | 84% | 2598 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,790 psi | 79% | 2572 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,051 psi | 80% | 2536 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 43,149 psi | 72% | 2490 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,317 psi | 59% | 2343 fps | 95.7% |
| Lovex S070 | <<locked>> | 84% | 38,189 psi | 63% | 2421 fps | 95.5% |
| Lovex S071 | <<locked>> | 98% | 34,954 psi | 58% | 2398 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 47,123 psi | 78% | 2546 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,616 psi | 79% | 2549 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,178 psi | 72% | 2530 fps | 99.6% |
| Norma 204 | <<locked>> | 90% | 44,425 psi | 74% | 2579 fps | 95% |
| Norma MRP | <<locked>> | 94% | 39,189 psi | 65% | 2572 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 31,865 psi | 53% | 2333 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 43,163 psi | 72% | 2549 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 35,404 psi | 59% | 2425 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 50,285 psi | 84% | 2615 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,125 psi | 83% | 2631 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,108 psi | 45% | 1506 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,655 psi | 69% | 2474 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,891 psi | 78% | 2648 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,782 psi | 63% | 2523 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,053 psi | 52% | 2339 fps | 95.2% |
| ReloadSwiss RS 70 | 46.3 gr | 82% | 33,257 psi | 55% | 2402 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 51,053 psi | 85% | 2572 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,846 psi | 75% | 2500 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,348 psi | 64% | 2431 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 96% | 44,527 psi | 74% | 2608 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 84% | 41,350 psi | 69% | 2461 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,317 psi | 59% | 2343 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,790 psi | 79% | 2572 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,149 psi | 72% | 2490 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 38,189 psi | 63% | 2421 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,421 psi | 65% | 2484 fps | 99.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,791 psi | 81% | 2595 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,789 psi | 78% | 2569 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,370 psi | 80% | 2490 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,480 psi | 67% | 2365 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,291 psi | 65% | 2388 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 44,106 psi | 73% | 2602 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 48,022 psi | 80% | 2493 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,486 psi | 81% | 2585 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 38,957 psi | 65% | 2434 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 28,427 psi | 47% | 2287 fps | 98% |
| Somchem S385 | <<locked>> | 94% | 42,366 psi | 70% | 2539 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 48,878 psi | 81% | 2480 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,701 psi | 74% | 2474 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,353 psi | 75% | 2490 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,202 psi | 62% | 2375 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 33,127 psi | 55% | 2333 fps | 96.3% |
| Vihtavuori N165 | <<locked>> | 98% | 41,698 psi | 69% | 2513 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 50,734 psi | 84% | 2598 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,424 psi | 72% | 2477 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,518 psi | 54% | 2329 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 86% | 29,762 psi | 49% | 2329 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,648 psi | 54% | 2310 fps | 98.3% |
| Winchester 748 | <<locked>> | 80% | 50,865 psi | 85% | 2644 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 38,957 psi | 65% | 2493 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,773 psi | 43% | 2274 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,427 psi | 77% | 2572 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 45,034 psi | 75% | 2575 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 98 powders for 7 x 64 Brenneke loaded with the .284 | 160gr | Peregrine VRG-3. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,812 fps; across all powders the maximum-charge window runs from 1,647 fps to 2,812 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 (415 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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. ReloadSwiss RS 70, Alliant Reloder-16, Hodgdon Superformance rank at the top here: for 7 x 64 Brenneke with the .284 | 160gr | Peregrine VRG-3 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.