Load Specifications
Load data in caliber 7 x 64 Brenneke with .284 | 145gr | Peregrine Glider GRM 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 Power Pro 2000-MR, Alliant Reloder-17 and ReloadSwiss RS 60.
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 2015 | <<locked>> | 84% | 52,489 psi | 87% | 2664 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,186 psi | 90% | 2736 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,896 psi | 90% | 2730 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 52,431 psi | 87% | 2746 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,882 psi | 90% | 2730 fps | 96.5% |
| Accurate 4064 | <<locked>> | 92% | 53,954 psi | 90% | 2776 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,737 psi | 89% | 2854 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 51,895 psi | 86% | 2762 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 52,808 psi | 88% | 2759 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,404 psi | 90% | 2766 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 51,416 psi | 85% | 2697 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 50,937 psi | 85% | 2864 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 52,431 psi | 87% | 2779 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,243 psi | 88% | 2802 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,083 psi | 87% | 2861 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 96% | 52,910 psi | 88% | 2897 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,724 psi | 61% | 2589 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,930 psi | 68% | 2736 fps | 96.9% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 51,271 psi | 85% | 2769 fps | 99.2% |
| Bofors RP3 | <<locked>> | 92% | 52,881 psi | 88% | 2795 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 53,316 psi | 89% | 2762 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 52,750 psi | 88% | 2700 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,403 psi | 89% | 2792 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 51,779 psi | 86% | 2835 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 92% | 54,099 psi | 90% | 2805 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 98% | 53,476 psi | 89% | 2854 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 96% | 54,375 psi | 90% | 2815 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 86% | 52,373 psi | 87% | 2772 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,269 psi | 80% | 2740 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 51,285 psi | 85% | 2799 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 54,186 psi | 90% | 2887 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,012 psi | 58% | 1693 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,534 psi | 89% | 2772 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 52,011 psi | 86% | 2756 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 52,156 psi | 87% | 2743 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,504 psi | 87% | 2723 fps | 97.1% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,417 psi | 89% | 2785 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 94% | 52,040 psi | 86% | 2743 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,981 psi | 85% | 2795 fps | 99.2% |
| IMR 4895 | <<locked>> | 88% | 51,198 psi | 85% | 2782 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 54,404 psi | 90% | 2766 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,954 psi | 90% | 2746 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 51,053 psi | 85% | 2736 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 51,750 psi | 86% | 2694 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 51,764 psi | 86% | 2740 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,273 psi | 90% | 2785 fps | 98.6% |
| Lovex S070 | <<locked>> | 98% | 51,953 psi | 86% | 2769 fps | 97.3% |
| Norma 201 | <<locked>> | 88% | 53,664 psi | 89% | 2756 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,186 psi | 90% | 2756 fps | 100% |
| Norma 203B | <<locked>> | 90% | 52,417 psi | 87% | 2789 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 52,881 psi | 88% | 2841 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 90% | 52,721 psi | 88% | 2812 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,837 psi | 86% | 2835 fps | 98% |
| Ramshot TAC | <<locked>> | 86% | 54,447 psi | 90% | 2779 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,027 psi | 90% | 2799 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 51,619 psi | 86% | 2713 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,607 psi | 59% | 1736 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,563 psi | 89% | 2743 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,375 psi | 90% | 2785 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,359 psi | 89% | 2864 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 52,939 psi | 88% | 2900 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,505 psi | 89% | 2877 fps | 99.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,722 psi | 89% | 2907 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 84% | 51,213 psi | 85% | 2690 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,012 psi | 90% | 2749 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 52,750 psi | 88% | 2785 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 53,316 psi | 89% | 2762 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,273 psi | 90% | 2785 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 51,053 psi | 85% | 2736 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 51,764 psi | 86% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 51,953 psi | 86% | 2769 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 51,198 psi | 85% | 2795 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 52,707 psi | 88% | 2756 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,577 psi | 89% | 2782 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 52,228 psi | 87% | 2654 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 52,431 psi | 87% | 2654 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 51,387 psi | 85% | 2690 fps | 96.9% |
| Somchem S321 | <<locked>> | 82% | 51,851 psi | 86% | 2746 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 51,459 psi | 85% | 2651 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 52,286 psi | 87% | 2749 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 53,330 psi | 89% | 2785 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,311 psi | 79% | 2792 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 52,054 psi | 86% | 2618 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 52,489 psi | 87% | 2641 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,795 psi | 89% | 2720 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 51,590 psi | 86% | 2694 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 51,343 psi | 85% | 2720 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 52,199 psi | 87% | 2792 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 84% | 51,198 psi | 85% | 2713 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 53,185 psi | 88% | 2736 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 51,271 psi | 85% | 2795 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,755 psi | 66% | 2661 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 52,591 psi | 87% | 2772 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 50,836 psi | 84% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,476 psi | 89% | 2854 fps | 97.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,605 psi | 54% | 2566 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,476 psi | 89% | 2792 fps | 100% |
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 2015 | <<locked>> | 80% | 46,325 psi | 77% | 2575 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,473 psi | 84% | 2684 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,595 psi | 64% | 2493 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,701 psi | 76% | 2644 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,195 psi | 78% | 2621 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 36,506 psi | 61% | 2487 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,172 psi | 58% | 2516 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 42,554 psi | 71% | 2598 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 80% | 36,405 psi | 60% | 2457 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,701 psi | 74% | 2612 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 44,730 psi | 74% | 2602 fps | 100% |
| Alliant Power Pro 2000-MR | 42.9 gr | 80% | 38,783 psi | 64% | 2625 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,723 psi | 59% | 2474 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,305 psi | 64% | 2533 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,679 psi | 59% | 2530 fps | 95.8% |
| Alliant Reloder-17 | 42.2 gr | 80% | 30,690 psi | 51% | 2428 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,530 psi | 51% | 2428 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 38,058 psi | 63% | 2674 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,872 psi | 70% | 2602 fps | 97.7% |
| Bofors RP3 | <<locked>> | 80% | 35,099 psi | 58% | 2474 fps | 98% |
| Bofors RP7 | <<locked>> | 92% | 46,905 psi | 78% | 2654 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,572 psi | 77% | 2602 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,468 psi | 72% | 2631 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,153 psi | 80% | 2776 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 80% | 36,042 psi | 60% | 2474 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 92% | 43,671 psi | 73% | 2684 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 94% | 51,053 psi | 85% | 2762 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 42,960 psi | 71% | 2612 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,472 psi | 51% | 2372 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,943 psi | 65% | 2579 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 94% | 46,891 psi | 78% | 2762 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,194 psi | 44% | 1516 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,394 psi | 69% | 2566 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 42,627 psi | 71% | 2612 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,174 psi | 63% | 2490 fps | 97.4% |
| IMR 4166 Enduron | <<locked>> | 84% | 46,311 psi | 77% | 2618 fps | 95.8% |
| IMR 4350 | <<locked>> | 96% | 47,050 psi | 78% | 2680 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,919 psi | 76% | 2638 fps | 95.5% |
| IMR 4831 | <<locked>> | 88% | 34,113 psi | 57% | 2474 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 39,247 psi | 65% | 2562 fps | 98.1% |
| IMR 8208 XBR | <<locked>> | 80% | 44,701 psi | 74% | 2612 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 50,604 psi | 84% | 2697 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,582 psi | 69% | 2582 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,844 psi | 71% | 2543 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 37,695 psi | 63% | 2487 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 39,813 psi | 66% | 2530 fps | 95.5% |
| Lovex S070 | <<locked>> | 92% | 42,917 psi | 71% | 2608 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 41,771 psi | 69% | 2556 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 42,090 psi | 70% | 2566 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,652 psi | 63% | 2520 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 35,694 psi | 59% | 2520 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 37,376 psi | 62% | 2536 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 39,914 psi | 66% | 2615 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 44,744 psi | 74% | 2615 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,135 psi | 73% | 2635 fps | 98.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,283 psi | 80% | 2657 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,295 psi | 44% | 1549 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,256 psi | 83% | 2694 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,727 psi | 69% | 2569 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,059 psi | 67% | 2631 fps | 97.8% |
| ReloadSwiss RS 60 | 42.2 gr | 80% | 32,721 psi | 54% | 2497 fps | 98.8% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,056 psi | 58% | 2533 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,942 psi | 63% | 2598 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 45,353 psi | 75% | 2595 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,610 psi | 66% | 2507 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 32,909 psi | 55% | 2415 fps | 97% |
| Rottweil R 907 | <<locked>> | 92% | 46,905 psi | 78% | 2654 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,813 psi | 66% | 2530 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,582 psi | 69% | 2582 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,695 psi | 63% | 2487 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 92% | 42,917 psi | 71% | 2608 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,997 psi | 56% | 2464 fps | 96.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,859 psi | 71% | 2589 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,104 psi | 68% | 2569 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,395 psi | 72% | 2516 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,926 psi | 60% | 2385 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 45,005 psi | 75% | 2582 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 48,370 psi | 80% | 2690 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,859 psi | 71% | 2516 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,627 psi | 71% | 2589 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 34,011 psi | 57% | 2428 fps | 97.1% |
| Somchem S365 | <<locked>> | 84% | 27,775 psi | 46% | 2356 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 49,124 psi | 82% | 2579 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,729 psi | 73% | 2513 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,160 psi | 65% | 2497 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,784 psi | 66% | 2503 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,242 psi | 54% | 2365 fps | 97.9% |
| Vihtavuori N160 | <<locked>> | 86% | 35,056 psi | 58% | 2470 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 44,904 psi | 75% | 2612 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 38,203 psi | 63% | 2490 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 36,593 psi | 61% | 2520 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 94% | 32,648 psi | 54% | 2500 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,705 psi | 51% | 2343 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 44,309 psi | 74% | 2651 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 43,671 psi | 73% | 2684 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,603 psi | 51% | 2503 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,538 psi | 67% | 2572 fps | 98.8% |
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 111 powders for 7 x 64 Brenneke loaded with the .284 | 145gr | Peregrine Glider GRM. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,907 fps; across all powders the maximum-charge window runs from 1,693 fps to 2,907 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 145.0 gr projectile in 0.284" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, ADI AR 2209 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 Power Pro 2000-MR, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for 7 x 64 Brenneke with the .284 | 145gr | Peregrine Glider GRM they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.