Load Specifications
Load data in caliber 7 x 64 Brenneke with .284 | 151gr | Warner Tool Co. Flat Line 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 60, Alliant Reloder-17 and Winchester 760.
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>> | 82% | 51,808 psi | 86% | 2592 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 53,606 psi | 89% | 2657 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 51,793 psi | 86% | 2674 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 52,605 psi | 87% | 2651 fps | 96.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 40,451 psi | 67% | 2552 fps | 95.8% |
| Accurate 4064 | <<locked>> | 90% | 53,722 psi | 89% | 2707 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 52,982 psi | 88% | 2779 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 86% | 53,867 psi | 89% | 2730 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 51,706 psi | 86% | 2680 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,287 psi | 89% | 2687 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,940 psi | 90% | 2661 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,490 psi | 89% | 2844 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 51,677 psi | 86% | 2707 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 52,069 psi | 87% | 2723 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,331 psi | 90% | 2835 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 51,938 psi | 86% | 2818 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,812 psi | 64% | 2579 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,468 psi | 72% | 2740 fps | 98.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,693 psi | 89% | 2746 fps | 99.7% |
| Bofors RP3 | <<locked>> | 90% | 51,953 psi | 86% | 2717 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 52,475 psi | 87% | 2690 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 82% | 51,517 psi | 86% | 2621 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 52,330 psi | 87% | 2713 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 53,983 psi | 90% | 2805 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 52,953 psi | 88% | 2730 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 96% | 52,533 psi | 87% | 2779 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 94% | 53,142 psi | 88% | 2740 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 86% | 54,447 psi | 90% | 2740 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,662 psi | 84% | 2717 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 53,882 psi | 90% | 2776 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 52,866 psi | 88% | 2808 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,549 psi | 59% | 1660 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 52,388 psi | 87% | 2694 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 50,995 psi | 85% | 2677 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,433 psi | 90% | 2717 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 51,358 psi | 85% | 2648 fps | 97.3% |
| IMR 4350 | <<locked>> | 98% | 52,605 psi | 87% | 2713 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,273 psi | 90% | 2720 fps | 97.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,621 psi | 89% | 2776 fps | 99.6% |
| IMR 4895 | <<locked>> | 88% | 53,388 psi | 89% | 2753 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 53,287 psi | 89% | 2687 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,882 psi | 90% | 2710 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,737 psi | 89% | 2664 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 54,259 psi | 90% | 2710 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,534 psi | 89% | 2717 fps | 98.8% |
| Lovex S070 | <<locked>> | 98% | 54,375 psi | 90% | 2749 fps | 98.1% |
| Norma 201 | <<locked>> | 86% | 52,808 psi | 88% | 2680 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,200 psi | 88% | 2680 fps | 100% |
| Norma 203B | <<locked>> | 88% | 51,285 psi | 85% | 2710 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 52,243 psi | 87% | 2769 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 88% | 51,721 psi | 86% | 2736 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,346 psi | 90% | 2815 fps | 98.7% |
| Ramshot TAC | <<locked>> | 84% | 53,171 psi | 88% | 2700 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 84% | 52,779 psi | 88% | 2720 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,824 psi | 89% | 2684 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,969 psi | 60% | 1699 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,200 psi | 88% | 2710 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 52,272 psi | 87% | 2785 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 51,895 psi | 86% | 2822 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 52,808 psi | 88% | 2805 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 52,417 psi | 87% | 2828 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 84% | 54,070 psi | 90% | 2664 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,461 psi | 89% | 2680 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 51,837 psi | 86% | 2710 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 52,475 psi | 87% | 2690 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,534 psi | 89% | 2717 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,882 psi | 90% | 2710 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,259 psi | 90% | 2710 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,375 psi | 90% | 2749 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,490 psi | 89% | 2769 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 51,663 psi | 86% | 2680 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 52,301 psi | 87% | 2703 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,331 psi | 90% | 2621 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,360 psi | 90% | 2618 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,693 psi | 89% | 2667 fps | 97.7% |
| Somchem S321 | <<locked>> | 82% | 54,273 psi | 90% | 2717 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,722 psi | 89% | 2621 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 51,140 psi | 85% | 2671 fps | 99.8% |
| Somchem S355 | <<locked>> | 92% | 52,257 psi | 87% | 2707 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,256 psi | 83% | 2776 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 54,041 psi | 90% | 2582 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 51,532 psi | 86% | 2566 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 53,185 psi | 88% | 2648 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,925 psi | 90% | 2664 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 53,650 psi | 89% | 2687 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 51,198 psi | 85% | 2713 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 84% | 53,490 psi | 89% | 2684 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 52,040 psi | 86% | 2661 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,795 psi | 89% | 2772 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,395 psi | 70% | 2654 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 51,605 psi | 86% | 2697 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,316 psi | 89% | 2730 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 52,533 psi | 87% | 2779 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,679 psi | 58% | 2579 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 86% | 52,286 psi | 87% | 2713 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% | 48,573 psi | 81% | 2546 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,350 psi | 69% | 2477 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,254 psi | 80% | 2621 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 46,412 psi | 77% | 2549 fps | 95.3% |
| Accurate 3100 | <<locked>> | 98% | 37,782 psi | 63% | 2497 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 39,088 psi | 65% | 2474 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,866 psi | 55% | 2405 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 44,904 psi | 75% | 2582 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 80% | 38,116 psi | 63% | 2438 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,963 psi | 78% | 2589 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 47,369 psi | 79% | 2572 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,770 psi | 68% | 2612 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,739 psi | 63% | 2457 fps | 98.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,611 psi | 67% | 2523 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 84% | 33,315 psi | 55% | 2418 fps | 95.3% |
| Alliant Reloder-17 | 41.8 gr | 80% | 32,518 psi | 54% | 2428 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,414 psi | 51% | 2372 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 35,056 psi | 58% | 2546 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,976 psi | 73% | 2585 fps | 98.5% |
| Bofors RP3 | <<locked>> | 80% | 37,391 psi | 62% | 2464 fps | 98.8% |
| Bofors RP7 | <<locked>> | 90% | 46,224 psi | 77% | 2585 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,704 psi | 81% | 2575 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,832 psi | 76% | 2612 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,633 psi | 84% | 2753 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 80% | 38,145 psi | 63% | 2464 fps | 96.4% |
| Hodgdon H414 | <<locked>> | 90% | 42,989 psi | 71% | 2615 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 92% | 49,937 psi | 83% | 2687 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 45,353 psi | 75% | 2592 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,572 psi | 47% | 2267 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,075 psi | 68% | 2562 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 92% | 45,905 psi | 76% | 2687 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,382 psi | 44% | 1480 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,279 psi | 72% | 2543 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 44,860 psi | 75% | 2582 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,016 psi | 66% | 2470 fps | 98.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,351 psi | 70% | 2487 fps | 95.1% |
| IMR 4350 | <<locked>> | 94% | 46,398 psi | 77% | 2612 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,424 psi | 70% | 2516 fps | 95% |
| IMR 4831 | <<locked>> | 86% | 34,084 psi | 57% | 2418 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 41,582 psi | 69% | 2549 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 80% | 46,963 psi | 78% | 2589 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 44,019 psi | 73% | 2562 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,889 psi | 75% | 2520 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 40,016 psi | 66% | 2477 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 37,028 psi | 62% | 2415 fps | 95% |
| Lovex S070 | <<locked>> | 90% | 42,554 psi | 71% | 2546 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 43,918 psi | 73% | 2536 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 44,164 psi | 73% | 2543 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,016 psi | 66% | 2510 fps | 98.6% |
| Norma URP | <<locked>> | 84% | 33,214 psi | 55% | 2405 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 39,479 psi | 66% | 2523 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 39,407 psi | 65% | 2549 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 46,775 psi | 78% | 2595 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,296 psi | 77% | 2615 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,357 psi | 84% | 2631 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,832 psi | 45% | 1519 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,205 psi | 68% | 2503 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,728 psi | 71% | 2621 fps | 98.7% |
| ReloadSwiss RS 60 | 41.8 gr | 80% | 34,606 psi | 57% | 2490 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,824 psi | 58% | 2474 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 37,420 psi | 62% | 2536 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 47,979 psi | 80% | 2575 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,727 psi | 69% | 2487 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 35,128 psi | 58% | 2408 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 46,224 psi | 77% | 2585 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 37,028 psi | 62% | 2415 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,019 psi | 73% | 2562 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,016 psi | 66% | 2477 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 90% | 42,554 psi | 71% | 2546 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,158 psi | 60% | 2457 fps | 97.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,136 psi | 75% | 2572 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,381 psi | 72% | 2552 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,266 psi | 75% | 2487 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,666 psi | 63% | 2362 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,150 psi | 73% | 2513 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 50,691 psi | 84% | 2664 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,860 psi | 75% | 2490 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,788 psi | 74% | 2569 fps | 99.2% |
| Somchem S355 | <<locked>> | 80% | 36,042 psi | 60% | 2415 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 26,078 psi | 43% | 2247 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 51,039 psi | 85% | 2543 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,585 psi | 76% | 2480 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,307 psi | 69% | 2470 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,785 psi | 69% | 2480 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,171 psi | 57% | 2352 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 34,780 psi | 58% | 2411 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 47,007 psi | 78% | 2585 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 40,234 psi | 67% | 2470 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 34,214 psi | 57% | 2411 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 90% | 30,777 psi | 51% | 2395 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,356 psi | 50% | 2283 fps | 96.2% |
| Winchester 748 | <<locked>> | 80% | 46,557 psi | 77% | 2628 fps | 100% |
| Winchester 760 | 46.1 gr | 90% | 43,265 psi | 72% | 2618 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,805 psi | 48% | 2395 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,670 psi | 71% | 2556 fps | 99.4% |
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 95 powders for 7 x 64 Brenneke loaded with the .284 | 151gr | Warner Tool Co. Flat Line. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,844 fps; across all powders the maximum-charge window runs from 1,660 fps to 2,844 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 58–90 %, leaving at least 10 % headroom. The 151.0 gr projectile in 0.284" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-16, Alliant Reloder-23 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 60, Alliant Reloder-17, Winchester 760 rank at the top here: for 7 x 64 Brenneke with the .284 | 151gr | Warner Tool Co. Flat Line 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.