Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 165gr | Barnes MRX BT 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 Power Pro 2000-MR, ReloadSwiss RS 60 and Alliant Reloder-17.
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: 31"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 49,298 psi | 89% | 2713 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 47,485 psi | 86% | 2736 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 49,313 psi | 89% | 2772 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 48,994 psi | 89% | 2799 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 49,211 psi | 89% | 2815 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 45,020 psi | 82% | 2831 fps | 98.7% |
| ADI AR 2206H | <<locked>> | 88% | 48,588 psi | 88% | 2812 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 94% | 49,719 psi | 90% | 2808 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 86% | 48,138 psi | 87% | 2766 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 47,369 psi | 86% | 2743 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 49,095 psi | 89% | 2864 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 47,790 psi | 87% | 2917 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 48,660 psi | 88% | 2828 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 49,458 psi | 90% | 2723 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 49,588 psi | 90% | 2851 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,150 psi | 82% | 2841 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 48,820 psi | 89% | 2936 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 31,691 psi | 57% | 2572 fps | 96.7% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 47,863 psi | 87% | 2818 fps | 99.1% |
| Bofors RP3 | <<locked>> | 94% | 48,457 psi | 88% | 2835 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 49,792 psi | 90% | 2799 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 47,311 psi | 86% | 2707 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 49,777 psi | 90% | 2844 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 47,688 psi | 87% | 2877 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 82% | 48,617 psi | 88% | 2766 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 49,284 psi | 89% | 2789 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 46,934 psi | 85% | 2795 fps | 98.5% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 48,863 psi | 89% | 2884 fps | 97% |
| Hodgdon H4895 | <<locked>> | 88% | 48,965 psi | 89% | 2822 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,307 psi | 75% | 2720 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 47,427 psi | 86% | 2848 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,519 psi | 63% | 1709 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 47,195 psi | 86% | 2772 fps | 99.8% |
| IMR 3031 | <<locked>> | 88% | 48,211 psi | 87% | 2805 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 49,168 psi | 89% | 2789 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 88% | 46,630 psi | 85% | 2710 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 96% | 48,892 psi | 89% | 2785 fps | 96.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 43,018 psi | 78% | 2776 fps | 98.4% |
| IMR 4895 | <<locked>> | 90% | 47,427 psi | 86% | 2828 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 86% | 48,138 psi | 87% | 2766 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 47,427 psi | 86% | 2746 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 47,195 psi | 86% | 2782 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 49,255 psi | 89% | 2743 fps | 99.7% |
| Lovex S062 | <<locked>> | 92% | 48,486 psi | 88% | 2789 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 47,601 psi | 86% | 2776 fps | 97.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 47,776 psi | 87% | 2802 fps | 96.9% |
| Norma 201 | <<locked>> | 88% | 47,268 psi | 86% | 2756 fps | 100% |
| Norma 202 | <<locked>> | 88% | 47,819 psi | 87% | 2766 fps | 100% |
| Norma 203B | <<locked>> | 92% | 48,747 psi | 88% | 2838 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 45,208 psi | 82% | 2828 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 92% | 48,588 psi | 88% | 2854 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 44,817 psi | 81% | 2822 fps | 97% |
| Ramshot TAC | <<locked>> | 86% | 48,182 psi | 87% | 2776 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 86% | 47,311 psi | 86% | 2795 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 84% | 48,921 psi | 89% | 2762 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,679 psi | 63% | 1749 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 47,543 psi | 86% | 2746 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 47,848 psi | 87% | 2779 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 48,805 psi | 89% | 2907 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 48,718 psi | 88% | 2940 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 44,802 psi | 81% | 2851 fps | 98.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 46,166 psi | 84% | 2877 fps | 98.1% |
| Rottweil R 901 | <<locked>> | 86% | 48,225 psi | 88% | 2740 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 47,805 psi | 87% | 2753 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 48,327 psi | 88% | 2825 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 49,792 psi | 90% | 2799 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 98% | 47,601 psi | 86% | 2776 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 47,195 psi | 86% | 2782 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 48,486 psi | 88% | 2789 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 47,776 psi | 87% | 2802 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 47,181 psi | 86% | 2841 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 49,371 psi | 90% | 2799 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 47,123 psi | 86% | 2782 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 49,472 psi | 90% | 2700 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 49,298 psi | 89% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 47,688 psi | 87% | 2726 fps | 96.5% |
| Somchem S321 | <<locked>> | 84% | 48,602 psi | 88% | 2799 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 48,602 psi | 88% | 2700 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 48,878 psi | 89% | 2795 fps | 99.7% |
| Somchem S355 | <<locked>> | 96% | 49,095 psi | 89% | 2825 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,161 psi | 73% | 2776 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 84% | 49,603 psi | 90% | 2671 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 49,559 psi | 90% | 2690 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 46,804 psi | 85% | 2723 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 48,066 psi | 87% | 2740 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 47,456 psi | 86% | 2762 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,877 psi | 87% | 2825 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 86% | 48,124 psi | 87% | 2762 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 49,574 psi | 90% | 2789 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,746 psi | 85% | 2831 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 33,272 psi | 60% | 2644 fps | 96.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,037 psi | 89% | 2812 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 47,224 psi | 86% | 2805 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 49,153 psi | 89% | 2890 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 49,516 psi | 90% | 2835 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 31"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 40,915 psi | 74% | 2582 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 44,309 psi | 80% | 2684 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 32,967 psi | 60% | 2497 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 39,610 psi | 72% | 2644 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 31,227 psi | 57% | 2487 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 31,357 psi | 57% | 2552 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 37,637 psi | 68% | 2605 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 32,111 psi | 58% | 2457 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,726 psi | 72% | 2618 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 38,537 psi | 70% | 2608 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,006 psi | 83% | 2812 fps | 99.8% |
| Alliant Power Pro 2000-MR | 44 gr | 80% | 33,924 psi | 62% | 2615 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 30,879 psi | 56% | 2474 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,340 psi | 84% | 2677 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 33,518 psi | 61% | 2536 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 90% | 33,228 psi | 60% | 2575 fps | 95.5% |
| Alliant Reloder-17 | 44.4 gr | 82% | 28,645 psi | 52% | 2484 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 29,820 psi | 54% | 2520 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,463 psi | 66% | 2602 fps | 96.8% |
| Bofors RP3 | <<locked>> | 80% | 29,979 psi | 54% | 2470 fps | 97.2% |
| Bofors RP7 | <<locked>> | 96% | 46,760 psi | 85% | 2749 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,640 psi | 76% | 2608 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,681 psi | 68% | 2635 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,481 psi | 75% | 2766 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 80% | 45,281 psi | 82% | 2713 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,006 psi | 83% | 2740 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 33,431 psi | 61% | 2526 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 96% | 42,815 psi | 78% | 2776 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 37,927 psi | 69% | 2618 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 28,224 psi | 51% | 2415 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,779 psi | 61% | 2579 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,498 psi | 46% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,448 psi | 66% | 2569 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 36,811 psi | 67% | 2615 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,591 psi | 61% | 2490 fps | 96.6% |
| IMR 4166 Enduron | <<locked>> | 86% | 43,874 psi | 80% | 2661 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 43,279 psi | 79% | 2687 fps | 95.3% |
| IMR 4831 | <<locked>> | 92% | 32,996 psi | 60% | 2566 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 34,272 psi | 62% | 2566 fps | 97.5% |
| IMR 8208 XBR | <<locked>> | 80% | 39,726 psi | 72% | 2618 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 44,222 psi | 80% | 2694 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 35,665 psi | 65% | 2579 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 38,319 psi | 70% | 2546 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 32,967 psi | 60% | 2490 fps | 98.2% |
| Lovex S065 | <<locked>> | 90% | 36,985 psi | 67% | 2575 fps | 95.2% |
| Lovex S070 | <<locked>> | 96% | 42,163 psi | 77% | 2700 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 36,753 psi | 67% | 2559 fps | 99% |
| Norma 202 | <<locked>> | 80% | 36,840 psi | 67% | 2572 fps | 100% |
| Norma 203B | <<locked>> | 80% | 32,909 psi | 60% | 2526 fps | 97% |
| Norma URP | <<locked>> | 90% | 32,706 psi | 59% | 2562 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 32,445 psi | 59% | 2533 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 96% | 39,218 psi | 71% | 2710 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 39,537 psi | 72% | 2615 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,595 psi | 70% | 2635 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,888 psi | 78% | 2661 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,744 psi | 47% | 1565 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,657 psi | 81% | 2700 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 39,030 psi | 71% | 2615 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 34,461 psi | 63% | 2625 fps | 96.9% |
| ReloadSwiss RS 60 | 43.3 gr | 80% | 28,587 psi | 52% | 2493 fps | 98% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 34,084 psi | 62% | 2628 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 37,637 psi | 68% | 2697 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 40,219 psi | 73% | 2602 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 34,867 psi | 63% | 2510 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 80% | 28,137 psi | 51% | 2411 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 96% | 46,760 psi | 85% | 2749 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 36,985 psi | 67% | 2575 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,665 psi | 65% | 2579 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 32,967 psi | 60% | 2490 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 96% | 42,163 psi | 77% | 2700 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 29,631 psi | 54% | 2464 fps | 95.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 37,362 psi | 68% | 2582 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,129 psi | 66% | 2572 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,479 psi | 70% | 2520 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,473 psi | 57% | 2388 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 41,452 psi | 75% | 2621 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 42,409 psi | 77% | 2694 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 37,985 psi | 69% | 2526 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 37,130 psi | 67% | 2582 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 29,457 psi | 53% | 2428 fps | 96.3% |
| Somchem S365 | <<locked>> | 86% | 25,541 psi | 46% | 2402 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 43,714 psi | 79% | 2585 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,653 psi | 70% | 2516 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,765 psi | 61% | 2500 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,766 psi | 63% | 2507 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 27,818 psi | 50% | 2365 fps | 97.1% |
| Vihtavuori N160 | <<locked>> | 88% | 32,314 psi | 59% | 2513 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 39,450 psi | 72% | 2608 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 33,460 psi | 61% | 2500 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 33,475 psi | 61% | 2566 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 98% | 31,212 psi | 57% | 2592 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 28,718 psi | 52% | 2388 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 38,464 psi | 70% | 2654 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 43,091 psi | 78% | 2782 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,244 psi | 64% | 2572 fps | 98.2% |
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 7.5 x 55 Swiss loaded with the .308 | 165gr | Barnes MRX BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,940 fps; across all powders the maximum-charge window runs from 1,709 fps to 2,940 fps. Accurate 4350 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 (380 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 7.5 x 55 Swiss with the .308 | 165gr | Barnes MRX BT 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.