Load Specifications
Load data in caliber 7 x 64 Brenneke with .284 | 150gr | Prvi Partizan HP BT bullet and 95 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-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 2495 | <<locked>> | 86% | 53,940 psi | 90% | 2690 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 52,591 psi | 87% | 2690 fps | 97.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,454 psi | 74% | 2651 fps | 97.3% |
| Accurate 4064 | <<locked>> | 88% | 53,896 psi | 90% | 2736 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 53,737 psi | 89% | 2822 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 53,867 psi | 89% | 2762 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 51,822 psi | 86% | 2720 fps | 99.8% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,098 psi | 87% | 2799 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 52,692 psi | 88% | 2713 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 53,925 psi | 90% | 2687 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,606 psi | 89% | 2881 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 51,909 psi | 86% | 2740 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 52,315 psi | 87% | 2759 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 51,561 psi | 86% | 2828 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 52,460 psi | 87% | 2858 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,082 psi | 85% | 2789 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,032 psi | 70% | 2677 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,398 psi | 79% | 2848 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,577 psi | 89% | 2779 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 52,112 psi | 87% | 2749 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 52,446 psi | 87% | 2730 fps | 97.4% |
| Hodgdon BL-C2 | <<locked>> | 82% | 52,228 psi | 87% | 2743 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,200 psi | 88% | 2769 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 94% | 53,040 psi | 88% | 2822 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 92% | 53,374 psi | 89% | 2782 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 54,447 psi | 90% | 2772 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 51,358 psi | 85% | 2756 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 53,983 psi | 90% | 2808 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,069 psi | 88% | 2851 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,766 psi | 59% | 1699 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 52,344 psi | 87% | 2726 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 51,387 psi | 85% | 2710 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 51,126 psi | 85% | 2700 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,085 psi | 90% | 2730 fps | 98.2% |
| IMR 4350 | <<locked>> | 96% | 52,605 psi | 87% | 2753 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,157 psi | 90% | 2756 fps | 98.1% |
| IMR 4831 | <<locked>> | 98% | 54,114 psi | 90% | 2812 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 53,664 psi | 89% | 2789 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 52,692 psi | 88% | 2713 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 53,896 psi | 90% | 2743 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,330 psi | 89% | 2694 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 51,082 psi | 85% | 2697 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 53,824 psi | 89% | 2753 fps | 99.1% |
| Lovex S070 | <<locked>> | 94% | 51,343 psi | 85% | 2736 fps | 97.9% |
| Norma 201 | <<locked>> | 84% | 52,649 psi | 87% | 2710 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,345 psi | 89% | 2713 fps | 100% |
| Norma 203B | <<locked>> | 86% | 51,605 psi | 86% | 2749 fps | 100% |
| Norma 204 | <<locked>> | 96% | 53,156 psi | 88% | 2799 fps | 96.3% |
| Norma MRPᴾ | <<locked>> | 100% | 47,108 psi | 78% | 2802 fps | 96.9% |
| Norma URP | <<locked>> | 96% | 52,924 psi | 88% | 2812 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 86% | 51,909 psi | 86% | 2769 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 51,576 psi | 86% | 2805 fps | 98.6% |
| Ramshot TAC | <<locked>> | 82% | 52,982 psi | 88% | 2733 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 52,504 psi | 87% | 2749 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,448 psi | 61% | 1742 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,171 psi | 88% | 2746 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 52,721 psi | 88% | 2822 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 52,257 psi | 87% | 2858 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 53,548 psi | 89% | 2848 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 52,808 psi | 88% | 2871 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 82% | 53,621 psi | 89% | 2690 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,200 psi | 88% | 2710 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 52,301 psi | 87% | 2746 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 49,559 psi | 82% | 2766 fps | 96% |
| Rottweil R 907 | <<locked>> | 92% | 52,446 psi | 87% | 2730 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 53,824 psi | 89% | 2753 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 53,896 psi | 90% | 2743 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 51,082 psi | 85% | 2697 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 51,343 psi | 85% | 2736 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 53,954 psi | 90% | 2808 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 51,343 psi | 85% | 2710 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 52,431 psi | 87% | 2736 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,099 psi | 90% | 2651 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,389 psi | 90% | 2651 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 53,867 psi | 89% | 2707 fps | 98.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 49,081 psi | 82% | 2762 fps | 95.9% |
| Somchem S335 | <<locked>> | 84% | 53,432 psi | 89% | 2648 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 51,184 psi | 85% | 2703 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 52,707 psi | 88% | 2746 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 50,966 psi | 85% | 2812 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,343 psi | 84% | 2749 fps | 97% |
| Vihtavuori N133 | <<locked>> | 84% | 54,462 psi | 90% | 2638 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,229 psi | 88% | 2677 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 53,824 psi | 89% | 2694 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 53,708 psi | 89% | 2723 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 51,547 psi | 86% | 2753 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 82% | 53,127 psi | 88% | 2710 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 52,025 psi | 86% | 2690 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,143 psi | 90% | 2812 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,514 psi | 77% | 2753 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 51,692 psi | 86% | 2733 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,345 psi | 89% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,040 psi | 88% | 2822 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,681 psi | 63% | 2697 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 84% | 52,025 psi | 86% | 2740 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 2495 | <<locked>> | 80% | 44,251 psi | 74% | 2549 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 45,977 psi | 76% | 2579 fps | 95.7% |
| Accurate 3100 | <<locked>> | 96% | 38,609 psi | 64% | 2543 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 41,829 psi | 69% | 2546 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,127 psi | 55% | 2434 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 47,616 psi | 79% | 2664 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 40,393 psi | 67% | 2516 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 98% | 48,675 psi | 81% | 2740 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,719 psi | 83% | 2667 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,604 psi | 84% | 2644 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,352 psi | 72% | 2700 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,393 psi | 67% | 2539 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,279 psi | 72% | 2602 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 82% | 33,330 psi | 55% | 2448 fps | 95.8% |
| Alliant Reloder-17 | 44.9 gr | 80% | 34,969 psi | 58% | 2520 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 98% | 47,805 psi | 79% | 2733 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,950 psi | 48% | 2359 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 92% | 35,737 psi | 59% | 2595 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,862 psi | 78% | 2667 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 40,059 psi | 67% | 2543 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 43,381 psi | 72% | 2569 fps | 95.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,660 psi | 81% | 2687 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,814 psi | 68% | 2549 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 40,669 psi | 68% | 2598 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 88% | 46,920 psi | 78% | 2671 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 48,124 psi | 80% | 2674 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,819 psi | 48% | 2300 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,251 psi | 74% | 2648 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 42,743 psi | 71% | 2664 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,672 psi | 44% | 1516 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,934 psi | 76% | 2621 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 47,935 psi | 80% | 2657 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,453 psi | 71% | 2549 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,933 psi | 75% | 2572 fps | 96.3% |
| IMR 4350 | <<locked>> | 90% | 43,613 psi | 72% | 2595 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,467 psi | 71% | 2552 fps | 95.5% |
| IMR 4831 | <<locked>> | 82% | 32,111 psi | 53% | 2392 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 44,367 psi | 74% | 2635 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 49,719 psi | 83% | 2667 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,152 psi | 78% | 2641 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,210 psi | 78% | 2595 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 42,511 psi | 71% | 2552 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 37,246 psi | 62% | 2451 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 40,103 psi | 67% | 2530 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 46,456 psi | 77% | 2612 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,065 psi | 78% | 2618 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,670 psi | 71% | 2592 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 49,719 psi | 83% | 2743 fps | 95.5% |
| Norma MRP | <<locked>> | 98% | 44,063 psi | 73% | 2743 fps | 96% |
| Norma URP | <<locked>> | 82% | 33,576 psi | 56% | 2441 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 42,134 psi | 70% | 2602 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 37,231 psi | 62% | 2530 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 49,487 psi | 82% | 2677 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,269 psi | 82% | 2697 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,122 psi | 45% | 1555 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,118 psi | 68% | 2533 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,992 psi | 76% | 2710 fps | 99.4% |
| ReloadSwiss RS 60 | 44.9 gr | 80% | 37,188 psi | 62% | 2582 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 32,866 psi | 55% | 2448 fps | 95.1% |
| ReloadSwiss RS 70 | 47.8 gr | 84% | 35,012 psi | 58% | 2507 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 50,531 psi | 84% | 2644 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,237 psi | 73% | 2562 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 37,782 psi | 63% | 2490 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 46,572 psi | 77% | 2717 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 86% | 43,381 psi | 72% | 2569 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,246 psi | 62% | 2451 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,152 psi | 78% | 2641 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,511 psi | 71% | 2552 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 40,103 psi | 67% | 2530 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,783 psi | 64% | 2539 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,095 psi | 80% | 2657 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,108 psi | 77% | 2635 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,601 psi | 79% | 2556 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,842 psi | 66% | 2428 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,597 psi | 69% | 2497 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 46,137 psi | 77% | 2710 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 47,297 psi | 79% | 2559 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,674 psi | 79% | 2648 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 38,392 psi | 64% | 2493 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 28,079 psi | 47% | 2336 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 44,353 psi | 74% | 2644 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 48,022 psi | 80% | 2546 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,961 psi | 73% | 2543 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,498 psi | 74% | 2552 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,608 psi | 61% | 2431 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 32,750 psi | 54% | 2388 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 49,734 psi | 83% | 2661 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,931 psi | 71% | 2546 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 34,418 psi | 57% | 2441 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 88% | 31,328 psi | 52% | 2434 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,285 psi | 54% | 2362 fps | 97.4% |
| Winchester 748 | <<locked>> | 80% | 49,922 psi | 83% | 2710 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 40,669 psi | 68% | 2598 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,109 psi | 48% | 2441 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,672 psi | 76% | 2638 fps | 99.8% |
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 95 powders for 7 x 64 Brenneke loaded with the .284 | 150gr | Prvi Partizan HP BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,881 fps; across all powders the maximum-charge window runs from 1,699 fps to 2,881 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:11.5 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-17, ReloadSwiss RS 60 rank at the top here: for 7 x 64 Brenneke with the .284 | 150gr | Prvi Partizan HP BT 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.