Load Specifications
Load data in caliber 7 x 64 Brenneke with .284 | 145gr | Speer Grand Slam bullet and 95 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 Ramshot Hunter.
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% | 54,346 psi | 90% | 2749 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 52,953 psi | 88% | 2753 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,976 psi | 75% | 2713 fps | 97.3% |
| Accurate 4064 | <<locked>> | 86% | 51,198 psi | 85% | 2753 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 50,618 psi | 84% | 2828 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 84% | 54,273 psi | 90% | 2828 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 52,098 psi | 87% | 2779 fps | 99.8% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,591 psi | 87% | 2864 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,200 psi | 88% | 2776 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,273 psi | 90% | 2749 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,969 psi | 90% | 2946 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 52,185 psi | 87% | 2799 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 52,634 psi | 87% | 2822 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 52,098 psi | 87% | 2890 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 52,910 psi | 88% | 2920 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,532 psi | 86% | 2851 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,612 psi | 71% | 2740 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,877 psi | 80% | 2910 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,911 psi | 90% | 2838 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 52,939 psi | 88% | 2818 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 52,808 psi | 88% | 2789 fps | 97.3% |
| Hodgdon BL-C2 | <<locked>> | 82% | 52,779 psi | 88% | 2805 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,635 psi | 89% | 2831 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 94% | 53,417 psi | 89% | 2884 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 92% | 53,896 psi | 90% | 2844 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 82% | 51,503 psi | 86% | 2785 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 51,895 psi | 86% | 2818 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,404 psi | 90% | 2871 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,693 psi | 89% | 2917 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,940 psi | 60% | 1745 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 52,721 psi | 88% | 2789 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 51,779 psi | 86% | 2772 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 51,517 psi | 86% | 2762 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 84% | 51,329 psi | 85% | 2740 fps | 97.6% |
| IMR 4350 | <<locked>> | 96% | 53,301 psi | 89% | 2818 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,447 psi | 90% | 2818 fps | 98% |
| IMR 4831 | <<locked>> | 96% | 51,401 psi | 85% | 2828 fps | 99.6% |
| IMR 4895 | <<locked>> | 86% | 53,969 psi | 90% | 2851 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,200 psi | 88% | 2776 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,186 psi | 90% | 2802 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,505 psi | 89% | 2753 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 51,474 psi | 86% | 2759 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,114 psi | 90% | 2812 fps | 99% |
| Lovex S070 | <<locked>> | 94% | 51,866 psi | 86% | 2799 fps | 97.9% |
| Norma 201 | <<locked>> | 84% | 53,098 psi | 88% | 2772 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,476 psi | 89% | 2772 fps | 100% |
| Norma 203B | <<locked>> | 86% | 51,895 psi | 86% | 2808 fps | 99.9% |
| Norma 204 | <<locked>> | 96% | 53,722 psi | 89% | 2864 fps | 96.3% |
| Norma MRPᴾ | <<locked>> | 100% | 47,688 psi | 79% | 2864 fps | 96.9% |
| Norma URP | <<locked>> | 96% | 53,417 psi | 89% | 2874 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 86% | 52,257 psi | 87% | 2831 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 52,141 psi | 87% | 2871 fps | 98.6% |
| Ramshot TAC | <<locked>> | 82% | 53,417 psi | 89% | 2795 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,026 psi | 88% | 2812 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,318 psi | 60% | 1781 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,795 psi | 89% | 2812 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,040 psi | 88% | 2884 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 52,750 psi | 88% | 2923 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,085 psi | 90% | 2910 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,229 psi | 88% | 2933 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 82% | 53,969 psi | 90% | 2753 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,650 psi | 89% | 2772 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 52,823 psi | 88% | 2808 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,125 psi | 83% | 2828 fps | 96% |
| Rottweil R 907 | <<locked>> | 92% | 52,808 psi | 88% | 2789 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,114 psi | 90% | 2812 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,186 psi | 90% | 2802 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 51,474 psi | 86% | 2759 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 51,866 psi | 86% | 2799 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 50,865 psi | 85% | 2815 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 51,837 psi | 86% | 2772 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 52,649 psi | 87% | 2795 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,404 psi | 90% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 51,576 psi | 86% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,317 psi | 90% | 2769 fps | 98.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 49,632 psi | 82% | 2825 fps | 95.8% |
| Somchem S335 | <<locked>> | 84% | 53,867 psi | 89% | 2710 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 51,648 psi | 86% | 2766 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 52,895 psi | 88% | 2805 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 51,677 psi | 86% | 2877 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,140 psi | 85% | 2815 fps | 97% |
| Vihtavuori N133 | <<locked>> | 82% | 51,372 psi | 85% | 2651 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,476 psi | 89% | 2736 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,186 psi | 90% | 2753 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,360 psi | 90% | 2785 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 52,069 psi | 87% | 2815 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 82% | 53,577 psi | 89% | 2776 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 52,518 psi | 87% | 2749 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 51,430 psi | 85% | 2822 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,181 psi | 78% | 2815 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 52,083 psi | 87% | 2795 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,664 psi | 89% | 2822 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,722 psi | 89% | 2887 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,189 psi | 63% | 2756 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 84% | 52,489 psi | 87% | 2802 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% | 44,614 psi | 74% | 2608 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 46,499 psi | 77% | 2641 fps | 95.7% |
| Accurate 3100 | <<locked>> | 96% | 39,276 psi | 65% | 2602 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 42,192 psi | 70% | 2605 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,562 psi | 56% | 2490 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 47,892 psi | 80% | 2720 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 40,741 psi | 68% | 2572 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 98% | 49,284 psi | 82% | 2805 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,995 psi | 83% | 2726 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,749 psi | 84% | 2703 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,918 psi | 73% | 2762 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,683 psi | 68% | 2598 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,555 psi | 72% | 2661 fps | 98.9% |
| Alliant Reloder-16 | 44.2 gr | 82% | 33,547 psi | 56% | 2503 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,273 psi | 59% | 2575 fps | 98.1% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,385 psi | 80% | 2795 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,312 psi | 49% | 2415 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 92% | 36,129 psi | 60% | 2654 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,369 psi | 79% | 2733 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 40,538 psi | 67% | 2605 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 43,714 psi | 73% | 2625 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,284 psi | 82% | 2753 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,263 psi | 69% | 2608 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 41,046 psi | 68% | 2654 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 88% | 47,587 psi | 79% | 2736 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 48,385 psi | 80% | 2733 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,935 psi | 48% | 2346 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,643 psi | 74% | 2710 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 43,279 psi | 72% | 2726 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,643 psi | 44% | 1555 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,195 psi | 77% | 2680 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 48,414 psi | 80% | 2720 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,757 psi | 71% | 2608 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,078 psi | 75% | 2628 fps | 96.2% |
| IMR 4350 | <<locked>> | 90% | 44,208 psi | 73% | 2657 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,815 psi | 71% | 2612 fps | 95.5% |
| IMR 4831 | <<locked>> | 82% | 32,547 psi | 54% | 2451 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 44,628 psi | 74% | 2690 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 49,995 psi | 83% | 2726 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,326 psi | 79% | 2700 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,543 psi | 79% | 2654 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 42,815 psi | 71% | 2612 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 37,463 psi | 62% | 2503 fps | 95.4% |
| Lovex S070 | <<locked>> | 86% | 40,393 psi | 67% | 2585 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 46,804 psi | 78% | 2671 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,384 psi | 79% | 2677 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,902 psi | 71% | 2651 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 50,067 psi | 83% | 2802 fps | 95.4% |
| Norma MRP | <<locked>> | 96% | 41,684 psi | 69% | 2743 fps | 95% |
| Norma URP | <<locked>> | 82% | 33,779 psi | 56% | 2493 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 42,699 psi | 71% | 2664 fps | 99.1% |
| Ramshot Hunter | 50.3 gr | 88% | 40,045 psi | 67% | 2641 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 49,995 psi | 83% | 2740 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,574 psi | 82% | 2756 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,064 psi | 45% | 1594 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,466 psi | 69% | 2589 fps | 95.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,137 psi | 77% | 2766 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,536 psi | 62% | 2638 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,330 psi | 55% | 2507 fps | 95.1% |
| ReloadSwiss RS 70 | 49.5 gr | 84% | 35,346 psi | 59% | 2562 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 50,995 psi | 85% | 2707 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,628 psi | 74% | 2625 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,058 psi | 63% | 2546 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 98% | 46,920 psi | 78% | 2772 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 86% | 43,714 psi | 73% | 2625 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,463 psi | 62% | 2503 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,326 psi | 79% | 2700 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,815 psi | 71% | 2612 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 40,393 psi | 67% | 2585 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,957 psi | 65% | 2595 fps | 98.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,327 psi | 80% | 2713 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,253 psi | 77% | 2690 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,095 psi | 80% | 2618 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,248 psi | 67% | 2487 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,843 psi | 70% | 2552 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 46,470 psi | 77% | 2766 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 47,630 psi | 79% | 2618 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,196 psi | 80% | 2710 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 38,696 psi | 64% | 2549 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 28,442 psi | 47% | 2392 fps | 97% |
| Somchem S385 | <<locked>> | 96% | 44,657 psi | 74% | 2700 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 48,501 psi | 81% | 2608 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,440 psi | 74% | 2602 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,773 psi | 74% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,898 psi | 61% | 2487 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 32,953 psi | 55% | 2441 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 50,227 psi | 83% | 2723 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,323 psi | 72% | 2602 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 34,737 psi | 58% | 2493 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 88% | 31,778 psi | 53% | 2490 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,692 psi | 54% | 2418 fps | 97.4% |
| Winchester 748 | <<locked>> | 80% | 50,328 psi | 84% | 2772 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,046 psi | 68% | 2654 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,414 psi | 49% | 2493 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,992 psi | 76% | 2697 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 113 powders for 7 x 64 Brenneke loaded with the .284 | 145gr | Speer Grand Slam. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,946 fps; across all powders the maximum-charge window runs from 1,745 fps to 2,946 fps. Accurate 3100 gives the best case fill at 100 %, and 113 of the 113 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 145.0 gr projectile in 0.284" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, 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-16, ReloadSwiss RS 70, Ramshot Hunter rank at the top here: for 7 x 64 Brenneke with the .284 | 145gr | Speer Grand Slam they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Alliant Reloder-22 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.