Load Specifications
Load data in caliber 7 x 64 Brenneke with .284 | 160gr | Hornady CX 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-17, ReloadSwiss RS 60 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% | 51,111 psi | 85% | 2503 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 52,475 psi | 87% | 2566 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 51,155 psi | 85% | 2585 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 52,373 psi | 87% | 2575 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 39,972 psi | 66% | 2474 fps | 96.3% |
| Accurate 4064 | <<locked>> | 90% | 52,837 psi | 88% | 2615 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 52,576 psi | 87% | 2697 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 86% | 53,708 psi | 89% | 2648 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 51,721 psi | 86% | 2602 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 52,707 psi | 88% | 2598 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,548 psi | 89% | 2572 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,185 psi | 88% | 2759 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 51,271 psi | 85% | 2621 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 51,982 psi | 86% | 2641 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,186 psi | 90% | 2753 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 94% | 51,822 psi | 86% | 2736 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,406 psi | 64% | 2503 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,888 psi | 71% | 2657 fps | 98.4% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,635 psi | 89% | 2664 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 51,517 psi | 86% | 2631 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 51,895 psi | 86% | 2608 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 51,474 psi | 86% | 2539 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 51,967 psi | 86% | 2628 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 53,809 psi | 89% | 2720 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 52,678 psi | 88% | 2648 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 96% | 52,359 psi | 87% | 2700 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 94% | 53,214 psi | 88% | 2664 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 86% | 54,288 psi | 90% | 2657 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,430 psi | 84% | 2635 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 53,795 psi | 89% | 2690 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 52,750 psi | 88% | 2733 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,389 psi | 59% | 1601 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 52,330 psi | 87% | 2615 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,288 psi | 90% | 2638 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,447 psi | 90% | 2635 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,389 psi | 90% | 2615 fps | 98.2% |
| IMR 4350 | <<locked>> | 98% | 52,431 psi | 87% | 2638 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 94% | 53,925 psi | 90% | 2638 fps | 98.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,447 psi | 89% | 2690 fps | 99.8% |
| IMR 4895 | <<locked>> | 88% | 53,316 psi | 89% | 2671 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 52,707 psi | 88% | 2598 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,330 psi | 89% | 2625 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,548 psi | 89% | 2582 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,099 psi | 90% | 2628 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,040 psi | 88% | 2631 fps | 99% |
| Lovex S070 | <<locked>> | 98% | 54,012 psi | 90% | 2667 fps | 98.4% |
| Norma 201 | <<locked>> | 86% | 52,388 psi | 87% | 2595 fps | 100% |
| Norma 202 | <<locked>> | 86% | 52,939 psi | 88% | 2595 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,331 psi | 90% | 2674 fps | 100% |
| Norma 204 | <<locked>> | 98% | 52,895 psi | 88% | 2680 fps | 96.3% |
| Norma URP | <<locked>> | 98% | 51,967 psi | 86% | 2687 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 88% | 51,285 psi | 85% | 2651 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,462 psi | 90% | 2740 fps | 99% |
| Ramshot TAC | <<locked>> | 84% | 52,924 psi | 88% | 2618 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 52,489 psi | 87% | 2635 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,447 psi | 89% | 2602 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,781 psi | 59% | 1637 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,098 psi | 88% | 2631 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 52,330 psi | 87% | 2703 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 51,692 psi | 86% | 2736 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 52,475 psi | 87% | 2720 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 52,185 psi | 87% | 2746 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 84% | 53,243 psi | 88% | 2575 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 52,736 psi | 88% | 2592 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 51,401 psi | 85% | 2625 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 51,895 psi | 86% | 2608 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,040 psi | 88% | 2631 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,330 psi | 89% | 2625 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,099 psi | 90% | 2628 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,012 psi | 90% | 2667 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,519 psi | 89% | 2690 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 51,256 psi | 85% | 2598 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 52,330 psi | 87% | 2625 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 53,925 psi | 90% | 2536 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,331 psi | 90% | 2539 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,287 psi | 89% | 2585 fps | 98% |
| Somchem S321 | <<locked>> | 82% | 53,853 psi | 89% | 2631 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,345 psi | 89% | 2536 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 50,894 psi | 85% | 2589 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 51,851 psi | 86% | 2621 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,719 psi | 83% | 2687 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 46,224 psi | 77% | 2575 fps | 96.1% |
| Vihtavuori N130 | <<locked>> | 82% | 53,824 psi | 89% | 2500 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,273 psi | 90% | 2520 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 52,837 psi | 88% | 2562 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,534 psi | 89% | 2575 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 53,476 psi | 89% | 2608 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 50,923 psi | 85% | 2635 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 84% | 53,272 psi | 89% | 2602 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 51,677 psi | 86% | 2575 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,301 psi | 89% | 2687 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,974 psi | 70% | 2572 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 51,358 psi | 85% | 2618 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 52,968 psi | 88% | 2644 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 52,359 psi | 87% | 2700 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,345 psi | 57% | 2510 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 86% | 52,069 psi | 87% | 2631 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% | 48,066 psi | 80% | 2461 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,495 psi | 67% | 2392 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,776 psi | 79% | 2536 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 45,934 psi | 76% | 2470 fps | 95.7% |
| Accurate 3100 | <<locked>> | 98% | 37,144 psi | 62% | 2418 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 38,319 psi | 64% | 2388 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,010 psi | 53% | 2323 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 44,396 psi | 74% | 2500 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 37,840 psi | 63% | 2362 fps | 97.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,543 psi | 77% | 2507 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 46,775 psi | 78% | 2487 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,292 psi | 67% | 2530 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,347 psi | 62% | 2382 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,074 psi | 67% | 2441 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 84% | 32,866 psi | 55% | 2343 fps | 95.8% |
| Alliant Reloder-17 | 40.6 gr | 80% | 32,111 psi | 53% | 2352 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 90% | 28,137 psi | 47% | 2247 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 94% | 34,664 psi | 58% | 2474 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,511 psi | 72% | 2503 fps | 98.7% |
| Bofors RP3 | <<locked>> | 80% | 36,680 psi | 61% | 2382 fps | 99% |
| Bofors RP7 | <<locked>> | 88% | 43,062 psi | 72% | 2457 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,254 psi | 80% | 2493 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,208 psi | 75% | 2526 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,299 psi | 84% | 2667 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 80% | 37,550 psi | 62% | 2385 fps | 96.8% |
| Hodgdon H414 | <<locked>> | 88% | 39,943 psi | 66% | 2484 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 90% | 46,673 psi | 78% | 2559 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 44,802 psi | 74% | 2510 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,123 psi | 47% | 2195 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,785 psi | 68% | 2484 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 90% | 42,525 psi | 71% | 2552 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,194 psi | 44% | 1427 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,134 psi | 72% | 2467 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 44,585 psi | 74% | 2500 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,740 psi | 66% | 2395 fps | 98.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,177 psi | 70% | 2411 fps | 95.6% |
| IMR 4350 | <<locked>> | 92% | 43,352 psi | 72% | 2487 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,148 psi | 70% | 2441 fps | 95.5% |
| IMR 4831 | <<locked>> | 84% | 31,357 psi | 52% | 2290 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 41,060 psi | 68% | 2467 fps | 99.1% |
| IMR 8208 XBR | <<locked>> | 80% | 46,543 psi | 77% | 2507 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,453 psi | 72% | 2477 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,353 psi | 74% | 2438 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 39,276 psi | 65% | 2392 fps | 99.5% |
| Lovex S065 | <<locked>> | 84% | 36,709 psi | 61% | 2343 fps | 95.5% |
| Lovex S070 | <<locked>> | 88% | 39,334 psi | 65% | 2415 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 43,424 psi | 72% | 2454 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 43,830 psi | 73% | 2461 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,421 psi | 65% | 2428 fps | 98.8% |
| Norma 204 | <<locked>> | 96% | 49,371 psi | 82% | 2625 fps | 95.5% |
| Norma URP | <<locked>> | 84% | 32,750 psi | 54% | 2329 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 38,957 psi | 65% | 2441 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 39,131 psi | 65% | 2474 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 46,282 psi | 77% | 2513 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,093 psi | 77% | 2536 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,154 psi | 83% | 2552 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,614 psi | 44% | 1463 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,276 psi | 64% | 2375 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,380 psi | 70% | 2539 fps | 98.9% |
| ReloadSwiss RS 60 | 40.6 gr | 80% | 34,214 psi | 57% | 2415 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 32,082 psi | 53% | 2343 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 34,534 psi | 57% | 2398 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 47,297 psi | 79% | 2487 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,191 psi | 68% | 2408 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 34,563 psi | 57% | 2329 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 43,062 psi | 72% | 2457 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,709 psi | 61% | 2343 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,453 psi | 72% | 2477 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,276 psi | 65% | 2392 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 88% | 39,334 psi | 65% | 2415 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,766 psi | 59% | 2382 fps | 97.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,512 psi | 74% | 2490 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,004 psi | 71% | 2474 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,860 psi | 75% | 2408 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,275 psi | 62% | 2283 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 41,089 psi | 68% | 2388 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 50,125 psi | 83% | 2579 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,498 psi | 74% | 2408 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,309 psi | 74% | 2487 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 35,563 psi | 59% | 2339 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 25,570 psi | 42% | 2178 fps | 96% |
| Somchem S385 | <<locked>> | 98% | 43,163 psi | 72% | 2523 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 50,720 psi | 84% | 2461 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,266 psi | 75% | 2398 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,814 psi | 68% | 2388 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,481 psi | 69% | 2402 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,765 psi | 56% | 2280 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 32,097 psi | 53% | 2283 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 46,528 psi | 77% | 2500 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 39,711 psi | 66% | 2388 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,547 psi | 56% | 2333 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 90% | 30,095 psi | 50% | 2316 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,776 psi | 49% | 2208 fps | 96.6% |
| Winchester 748 | <<locked>> | 80% | 46,296 psi | 77% | 2546 fps | 100% |
| Winchester 760 | 43.7 gr | 88% | 39,943 psi | 66% | 2484 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,195 psi | 47% | 2323 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,322 psi | 70% | 2474 fps | 99.6% |
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 116 powders for 7 x 64 Brenneke loaded with the .284 | 160gr | Hornady CX. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,759 fps; across all powders the maximum-charge window runs from 1,601 fps to 2,759 fps. Accurate 3100 gives the best case fill at 100 %, and 116 of the 116 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, 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 Reloder-17, ReloadSwiss RS 60, Winchester 760 rank at the top here: for 7 x 64 Brenneke with the .284 | 160gr | Hornady CX they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate High Country, Alliant Reloder-22, Alliant Reloder-25 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.