Load Specifications
Load data in caliber 7 x 64 Brenneke with .284 | 145gr | Prvi Partizan SP 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-16 and ReloadSwiss RS 70.
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% | 54,027 psi | 90% | 2746 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 52,692 psi | 88% | 2746 fps | 97% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,715 psi | 74% | 2707 fps | 97.2% |
| Accurate 4064 | <<locked>> | 88% | 54,215 psi | 90% | 2795 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,230 psi | 90% | 2884 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 54,244 psi | 90% | 2825 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 51,808 psi | 86% | 2772 fps | 99.7% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,301 psi | 87% | 2858 fps | 96% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,142 psi | 88% | 2776 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,230 psi | 90% | 2749 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,969 psi | 90% | 2943 fps | 99.9% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,025 psi | 86% | 2858 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 52,185 psi | 87% | 2799 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 52,605 psi | 87% | 2818 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 96% | 51,793 psi | 86% | 2887 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 52,924 psi | 88% | 2920 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,285 psi | 85% | 2844 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,337 psi | 70% | 2733 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,616 psi | 79% | 2904 fps | 99.1% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,925 psi | 90% | 2838 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 52,649 psi | 87% | 2812 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 52,504 psi | 87% | 2782 fps | 97.3% |
| Hodgdon BL-C2 | <<locked>> | 82% | 52,431 psi | 87% | 2799 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,301 psi | 89% | 2825 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 94% | 53,156 psi | 88% | 2877 fps | 98% |
| Hodgdon H4350 | <<locked>> | 92% | 53,606 psi | 89% | 2838 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 82% | 51,517 psi | 86% | 2785 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 51,590 psi | 86% | 2812 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,418 psi | 90% | 2867 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,417 psi | 89% | 2910 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,810 psi | 59% | 1742 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 52,417 psi | 87% | 2782 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 51,372 psi | 85% | 2766 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 51,474 psi | 86% | 2759 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,288 psi | 90% | 2785 fps | 98.1% |
| IMR 4350 | <<locked>> | 96% | 53,026 psi | 88% | 2812 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 51,213 psi | 85% | 2766 fps | 97.5% |
| IMR 4831 | <<locked>> | 96% | 51,097 psi | 85% | 2818 fps | 99.5% |
| IMR 4895 | <<locked>> | 86% | 53,969 psi | 90% | 2848 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,142 psi | 88% | 2776 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,157 psi | 90% | 2802 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,490 psi | 89% | 2753 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 51,474 psi | 86% | 2759 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,128 psi | 90% | 2812 fps | 99% |
| Lovex S070 | <<locked>> | 94% | 51,634 psi | 86% | 2795 fps | 97.9% |
| Norma 201 | <<locked>> | 84% | 53,069 psi | 88% | 2772 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,490 psi | 89% | 2769 fps | 100% |
| Norma 203B | <<locked>> | 86% | 51,895 psi | 86% | 2805 fps | 99.9% |
| Norma 204 | <<locked>> | 96% | 53,447 psi | 89% | 2858 fps | 96.2% |
| Norma MRPᴾ | <<locked>> | 100% | 47,427 psi | 79% | 2858 fps | 96.7% |
| Norma URP | <<locked>> | 96% | 53,113 psi | 88% | 2871 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 86% | 52,257 psi | 87% | 2828 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 51,866 psi | 86% | 2864 fps | 98.5% |
| Ramshot TAC | <<locked>> | 82% | 53,142 psi | 88% | 2792 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,011 psi | 88% | 2812 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,463 psi | 61% | 1785 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,490 psi | 89% | 2805 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 52,997 psi | 88% | 2884 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 52,446 psi | 87% | 2917 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 53,838 psi | 89% | 2904 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 52,939 psi | 88% | 2930 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 82% | 53,969 psi | 90% | 2753 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,621 psi | 89% | 2772 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 52,475 psi | 87% | 2805 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,169 psi | 83% | 2828 fps | 96% |
| Rottweil R 907 | <<locked>> | 92% | 52,504 psi | 87% | 2782 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,128 psi | 90% | 2812 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,157 psi | 90% | 2802 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 51,474 psi | 86% | 2759 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 51,634 psi | 86% | 2795 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,215 psi | 90% | 2864 fps | 100% |
| 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 | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,070 psi | 90% | 2707 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 51,300 psi | 85% | 2664 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,070 psi | 90% | 2762 fps | 98% |
| Somchem S335 | <<locked>> | 84% | 53,882 psi | 90% | 2707 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 51,343 psi | 85% | 2762 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 52,881 psi | 88% | 2805 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 51,401 psi | 85% | 2874 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,850 psi | 84% | 2808 fps | 97% |
| Vihtavuori N133 | <<locked>> | 84% | 54,418 psi | 90% | 2690 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,490 psi | 89% | 2736 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 53,896 psi | 90% | 2746 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,114 psi | 90% | 2782 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 52,141 psi | 87% | 2815 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 82% | 53,243 psi | 88% | 2769 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 52,199 psi | 87% | 2746 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 51,111 psi | 85% | 2818 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,876 psi | 78% | 2808 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 51,880 psi | 86% | 2789 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,664 psi | 89% | 2822 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,432 psi | 89% | 2881 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,000 psi | 63% | 2753 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 84% | 52,504 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% | 44,585 psi | 74% | 2605 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 46,195 psi | 77% | 2635 fps | 95.6% |
| Accurate 3100 | <<locked>> | 96% | 39,001 psi | 65% | 2595 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 42,134 psi | 70% | 2605 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,533 psi | 56% | 2490 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 47,863 psi | 80% | 2720 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 40,683 psi | 68% | 2572 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 98% | 49,008 psi | 81% | 2799 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,937 psi | 83% | 2723 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,720 psi | 84% | 2700 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,671 psi | 73% | 2756 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 48,820 psi | 81% | 2799 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,408 psi | 67% | 2592 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,497 psi | 72% | 2657 fps | 98.9% |
| Alliant Reloder-16 | 44.1 gr | 82% | 33,504 psi | 56% | 2500 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,027 psi | 58% | 2569 fps | 98% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,167 psi | 80% | 2792 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,138 psi | 48% | 2405 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 92% | 35,940 psi | 60% | 2644 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,123 psi | 78% | 2726 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 40,248 psi | 67% | 2598 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 43,700 psi | 73% | 2625 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,965 psi | 81% | 2746 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,988 psi | 68% | 2602 fps | 97.4% |
| Hodgdon H414 | <<locked>> | 86% | 40,814 psi | 68% | 2648 fps | 95% |
| Hodgdon H4350 | <<locked>> | 88% | 47,297 psi | 79% | 2730 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 48,327 psi | 80% | 2733 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,892 psi | 48% | 2346 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,367 psi | 74% | 2703 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 43,047 psi | 72% | 2717 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,745 psi | 44% | 1555 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,195 psi | 77% | 2680 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 48,327 psi | 80% | 2720 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,743 psi | 71% | 2605 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,092 psi | 75% | 2625 fps | 96.2% |
| IMR 4350 | <<locked>> | 90% | 43,932 psi | 73% | 2651 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,554 psi | 71% | 2605 fps | 95.3% |
| IMR 4831 | <<locked>> | 82% | 32,503 psi | 54% | 2448 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 44,570 psi | 74% | 2690 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 49,937 psi | 83% | 2723 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,282 psi | 79% | 2697 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,514 psi | 79% | 2654 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 42,815 psi | 71% | 2608 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 37,420 psi | 62% | 2500 fps | 95.4% |
| Lovex S070 | <<locked>> | 86% | 40,161 psi | 67% | 2579 fps | 95% |
| Norma 201 | <<locked>> | 80% | 46,775 psi | 78% | 2667 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,079 psi | 78% | 2674 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,902 psi | 71% | 2648 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 50,096 psi | 83% | 2802 fps | 95.4% |
| Norma MRP | <<locked>> | 98% | 44,179 psi | 73% | 2795 fps | 95.8% |
| Norma URP | <<locked>> | 82% | 33,736 psi | 56% | 2490 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 42,395 psi | 70% | 2657 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 40,030 psi | 67% | 2641 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 49,734 psi | 83% | 2733 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,574 psi | 82% | 2756 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,166 psi | 45% | 1594 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,234 psi | 69% | 2582 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,137 psi | 77% | 2766 fps | 99.3% |
| ReloadSwiss RS 60 | 46.3 gr | 80% | 37,260 psi | 62% | 2631 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,098 psi | 55% | 2500 fps | 95% |
| ReloadSwiss RS 70 | 49.4 gr | 84% | 35,346 psi | 59% | 2562 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 50,691 psi | 84% | 2703 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,599 psi | 74% | 2621 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,043 psi | 63% | 2546 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 98% | 46,876 psi | 78% | 2769 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 86% | 43,700 psi | 73% | 2625 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,420 psi | 62% | 2500 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,282 psi | 79% | 2697 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,815 psi | 71% | 2608 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 40,161 psi | 67% | 2579 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,943 psi | 65% | 2592 fps | 98.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,370 psi | 80% | 2713 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,209 psi | 77% | 2690 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,066 psi | 80% | 2618 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,219 psi | 67% | 2487 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,800 psi | 69% | 2552 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 47,630 psi | 79% | 2618 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,935 psi | 80% | 2703 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 38,667 psi | 64% | 2549 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 28,239 psi | 47% | 2385 fps | 96.9% |
| Somchem S385 | <<locked>> | 96% | 44,686 psi | 74% | 2700 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 48,472 psi | 81% | 2608 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,382 psi | 74% | 2602 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,773 psi | 74% | 2608 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,854 psi | 61% | 2484 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 32,953 psi | 55% | 2441 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 49,937 psi | 83% | 2717 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,062 psi | 72% | 2598 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 34,505 psi | 57% | 2490 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 88% | 31,546 psi | 52% | 2484 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,474 psi | 54% | 2411 fps | 97.3% |
| Winchester 748 | <<locked>> | 80% | 50,024 psi | 83% | 2766 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,075 psi | 68% | 2654 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,225 psi | 49% | 2487 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,021 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 95 powders for 7 x 64 Brenneke loaded with the .284 | 145gr | Prvi Partizan SP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,943 fps; across all powders the maximum-charge window runs from 1,742 fps to 2,943 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 145.0 gr projectile in 0.284" calls for a 1:13.0 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. ReloadSwiss RS 60, Alliant Reloder-16, ReloadSwiss RS 70 rank at the top here: for 7 x 64 Brenneke with the .284 | 145gr | Prvi Partizan SP 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.