Load Specifications
Load data in caliber 7 x 64 Brenneke with .284 | 155gr | Geco EXPRESS bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 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.
A valid access license is required to use the Personalized Load Calculator.
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>> | 84% | 51,503 psi | 86% | 2608 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,359 psi | 89% | 2661 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,266 psi | 75% | 2625 fps | 97.8% |
| Accurate 4064 | <<locked>> | 86% | 51,590 psi | 86% | 2657 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 51,445 psi | 85% | 2743 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 82% | 51,488 psi | 86% | 2680 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 52,504 psi | 87% | 2684 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,055 psi | 88% | 2776 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,679 psi | 89% | 2680 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 51,024 psi | 85% | 2795 fps | 99.9% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,562 psi | 87% | 2769 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 52,750 psi | 88% | 2707 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,142 psi | 88% | 2726 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 52,533 psi | 87% | 2799 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,548 psi | 89% | 2828 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,779 psi | 86% | 2759 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,960 psi | 71% | 2654 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,884 psi | 63% | 2559 fps | 96.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,356 psi | 80% | 2825 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,404 psi | 90% | 2746 fps | 99.9% |
| Bofors RP3 | <<locked>> | 88% | 53,359 psi | 89% | 2723 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 53,214 psi | 88% | 2697 fps | 97.8% |
| Hodgdon BL-C2 | <<locked>> | 82% | 53,069 psi | 88% | 2707 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,099 psi | 90% | 2736 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 94% | 54,114 psi | 90% | 2795 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 92% | 54,273 psi | 90% | 2753 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 82% | 52,025 psi | 86% | 2690 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 52,475 psi | 87% | 2726 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 51,416 psi | 85% | 2720 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,244 psi | 90% | 2828 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,969 psi | 60% | 1670 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,040 psi | 88% | 2694 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 52,112 psi | 87% | 2671 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 52,083 psi | 87% | 2667 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 51,692 psi | 86% | 2648 fps | 98% |
| IMR 4350 | <<locked>> | 96% | 53,534 psi | 89% | 2723 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 51,851 psi | 86% | 2677 fps | 98% |
| IMR 4831 | <<locked>> | 96% | 52,025 psi | 86% | 2736 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 51,329 psi | 85% | 2707 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,679 psi | 89% | 2680 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 51,213 psi | 85% | 2657 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,940 psi | 90% | 2657 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 52,127 psi | 87% | 2667 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 51,271 psi | 85% | 2671 fps | 99% |
| Lovex S070 | <<locked>> | 94% | 52,272 psi | 87% | 2707 fps | 98.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,768 psi | 63% | 2484 fps | 95.8% |
| Norma 201 | <<locked>> | 84% | 53,650 psi | 89% | 2677 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,070 psi | 90% | 2677 fps | 100% |
| Norma 203B | <<locked>> | 86% | 52,388 psi | 87% | 2713 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,244 psi | 90% | 2772 fps | 96.9% |
| Norma MRPᴾ | <<locked>> | 100% | 47,921 psi | 80% | 2776 fps | 97.4% |
| Norma URP | <<locked>> | 96% | 53,998 psi | 90% | 2782 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 86% | 52,881 psi | 88% | 2740 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 52,678 psi | 88% | 2779 fps | 99% |
| Ramshot TAC | <<locked>> | 82% | 53,751 psi | 89% | 2703 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,650 psi | 89% | 2720 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,419 psi | 61% | 1709 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,346 psi | 90% | 2720 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,635 psi | 89% | 2789 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 53,287 psi | 89% | 2825 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 50,894 psi | 85% | 2762 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,606 psi | 89% | 2841 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 86% | 54,259 psi | 90% | 2677 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 53,214 psi | 88% | 2713 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,676 psi | 84% | 2743 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 92% | 53,214 psi | 88% | 2697 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 51,271 psi | 85% | 2671 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 82% | 51,213 psi | 85% | 2657 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 52,127 psi | 87% | 2667 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 52,272 psi | 87% | 2707 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 51,430 psi | 85% | 2723 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 52,446 psi | 87% | 2684 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,171 psi | 88% | 2703 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 51,474 psi | 86% | 2569 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 51,851 psi | 86% | 2572 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 51,213 psi | 85% | 2625 fps | 98% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,183 psi | 83% | 2740 fps | 96.5% |
| Somchem S335 | <<locked>> | 84% | 54,375 psi | 90% | 2615 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 51,967 psi | 86% | 2671 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 53,519 psi | 89% | 2713 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 52,185 psi | 87% | 2782 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,488 psi | 86% | 2723 fps | 97.5% |
| Vihtavuori N133 | <<locked>> | 82% | 51,851 psi | 86% | 2556 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,983 psi | 90% | 2638 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 51,474 psi | 86% | 2615 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 51,416 psi | 85% | 2644 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 52,881 psi | 88% | 2730 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 54,172 psi | 90% | 2680 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 52,837 psi | 88% | 2654 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 51,692 psi | 86% | 2730 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,674 psi | 79% | 2726 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 52,388 psi | 87% | 2700 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,186 psi | 90% | 2726 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,114 psi | 90% | 2795 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,580 psi | 64% | 2680 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,171 psi | 88% | 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 2495 | <<locked>> | 80% | 45,165 psi | 75% | 2520 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,932 psi | 73% | 2503 fps | 95.5% |
| Accurate 3100 | <<locked>> | 94% | 37,072 psi | 62% | 2470 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 42,743 psi | 71% | 2520 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,676 psi | 53% | 2359 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 48,225 psi | 80% | 2628 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 41,118 psi | 68% | 2487 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 96% | 46,412 psi | 77% | 2661 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,328 psi | 84% | 2631 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,338 psi | 74% | 2677 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 46,311 psi | 77% | 2661 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,959 psi | 68% | 2510 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,874 psi | 73% | 2572 fps | 99.3% |
| Alliant Reloder-16 | 41.3 gr | 80% | 31,821 psi | 53% | 2372 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,549 psi | 59% | 2493 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 96% | 45,687 psi | 76% | 2654 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,804 psi | 46% | 2290 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 98% | 35,520 psi | 59% | 2500 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 90% | 33,982 psi | 56% | 2513 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,848 psi | 79% | 2641 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 40,959 psi | 68% | 2520 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 41,481 psi | 69% | 2490 fps | 95.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,690 psi | 83% | 2657 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,713 psi | 69% | 2526 fps | 98% |
| Hodgdon H414 | <<locked>> | 84% | 38,711 psi | 64% | 2516 fps | 95% |
| Hodgdon H4350 | <<locked>> | 86% | 44,918 psi | 75% | 2592 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 48,747 psi | 81% | 2638 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,283 psi | 49% | 2277 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,991 psi | 75% | 2618 fps | 100% |
| Hodgdon Superformance | 50.6 gr | 86% | 40,857 psi | 68% | 2585 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,789 psi | 45% | 1490 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,775 psi | 78% | 2595 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 48,950 psi | 81% | 2625 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,207 psi | 72% | 2520 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,455 psi | 76% | 2539 fps | 96.8% |
| IMR 4350 | <<locked>> | 88% | 41,785 psi | 69% | 2520 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,567 psi | 67% | 2474 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 30,908 psi | 51% | 2326 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 44,991 psi | 75% | 2602 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 50,328 psi | 84% | 2631 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,877 psi | 80% | 2608 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,008 psi | 80% | 2566 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 43,308 psi | 72% | 2523 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 35,578 psi | 59% | 2375 fps | 95.4% |
| Lovex S070 | <<locked>> | 84% | 38,392 psi | 64% | 2454 fps | 95.1% |
| Lovex S071 | <<locked>> | 98% | 35,462 psi | 59% | 2434 fps | 95% |
| Norma 201 | <<locked>> | 80% | 47,311 psi | 79% | 2582 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,645 psi | 79% | 2582 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,250 psi | 72% | 2559 fps | 99.5% |
| Norma 204 | <<locked>> | 92% | 47,355 psi | 79% | 2661 fps | 95.3% |
| Norma MRP | <<locked>> | 96% | 41,916 psi | 70% | 2657 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 32,068 psi | 53% | 2365 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 43,105 psi | 72% | 2579 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 37,913 psi | 63% | 2507 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 50,473 psi | 84% | 2651 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,995 psi | 83% | 2664 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,253 psi | 45% | 1529 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,727 psi | 69% | 2507 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,775 psi | 78% | 2680 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,811 psi | 63% | 2552 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,488 psi | 52% | 2375 fps | 95% |
| ReloadSwiss RS 70 | 47.5 gr | 84% | 35,853 psi | 60% | 2493 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 45,078 psi | 75% | 2536 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,580 psi | 64% | 2467 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 96% | 44,396 psi | 74% | 2635 fps | 95% |
| Rottweil R 907 | <<locked>> | 84% | 41,481 psi | 69% | 2490 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,578 psi | 59% | 2375 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,877 psi | 80% | 2608 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,308 psi | 72% | 2523 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 38,392 psi | 64% | 2454 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,421 psi | 65% | 2513 fps | 98.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,776 psi | 81% | 2625 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,760 psi | 78% | 2602 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,399 psi | 80% | 2523 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,553 psi | 67% | 2402 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,465 psi | 66% | 2418 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 47,123 psi | 78% | 2687 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 48,124 psi | 80% | 2526 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,675 psi | 81% | 2621 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 39,146 psi | 65% | 2467 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 28,703 psi | 48% | 2320 fps | 97.7% |
| Somchem S385 | <<locked>> | 94% | 42,380 psi | 70% | 2569 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 48,834 psi | 81% | 2513 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,817 psi | 74% | 2510 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,368 psi | 75% | 2523 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,391 psi | 62% | 2408 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 33,286 psi | 55% | 2362 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 80% | 50,691 psi | 84% | 2631 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,758 psi | 73% | 2516 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,953 psi | 55% | 2369 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 86% | 30,023 psi | 50% | 2362 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,982 psi | 55% | 2343 fps | 98% |
| Winchester 748 | <<locked>> | 80% | 50,705 psi | 84% | 2674 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 38,957 psi | 65% | 2523 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,862 psi | 46% | 2365 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,354 psi | 77% | 2608 fps | 99.9% |
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 96 powders for 7 x 64 Brenneke loaded with the .284 | 155gr | Geco EXPRESS. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,841 fps; across all powders the maximum-charge window runs from 1,670 fps to 2,841 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 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 155.0 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 Power Pro Varmint 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-16, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for 7 x 64 Brenneke with the .284 | 155gr | Geco EXPRESS 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.