Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 180gr | Speer Magnum Tip Soft Point 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 70, ReloadSwiss RS 60 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: 31"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 86% | 48,240 psi | 88% | 2641 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 49,864 psi | 90% | 2700 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,964 psi | 87% | 2638 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 38,479 psi | 70% | 2595 fps | 97.1% |
| Accurate 4064 | <<locked>> | 88% | 48,472 psi | 88% | 2690 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 47,442 psi | 86% | 2769 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 49,255 psi | 89% | 2720 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 47,123 psi | 86% | 2671 fps | 99.8% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 46,644 psi | 85% | 2740 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 48,414 psi | 88% | 2671 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 48,530 psi | 88% | 2641 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 48,182 psi | 87% | 2831 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 49,835 psi | 90% | 2740 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 47,181 psi | 86% | 2710 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 98% | 49,400 psi | 90% | 2828 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 46,601 psi | 85% | 2805 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 45,556 psi | 83% | 2733 fps | 95.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,231 psi | 68% | 2631 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,423 psi | 75% | 2789 fps | 99% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 48,472 psi | 88% | 2730 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 46,717 psi | 85% | 2703 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 47,659 psi | 86% | 2677 fps | 97.3% |
| Hodgdon BL-C2 | <<locked>> | 82% | 47,195 psi | 86% | 2700 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 48,008 psi | 87% | 2720 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 94% | 47,108 psi | 85% | 2766 fps | 98% |
| Hodgdon H4350 | <<locked>> | 92% | 48,124 psi | 87% | 2726 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 84% | 49,748 psi | 90% | 2730 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,718 psi | 88% | 2749 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 48,428 psi | 88% | 2759 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 47,340 psi | 86% | 2795 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,273 psi | 64% | 1663 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 47,630 psi | 86% | 2680 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 49,226 psi | 89% | 2707 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 49,545 psi | 90% | 2700 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 49,705 psi | 90% | 2680 fps | 98.1% |
| IMR 4350 | <<locked>> | 96% | 47,616 psi | 86% | 2703 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 49,400 psi | 90% | 2710 fps | 98.1% |
| IMR 4831 | <<locked>> | 98% | 48,196 psi | 87% | 2762 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 48,370 psi | 88% | 2740 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 48,414 psi | 88% | 2671 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 48,240 psi | 88% | 2690 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 49,081 psi | 89% | 2648 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 49,313 psi | 89% | 2697 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 48,704 psi | 88% | 2703 fps | 99% |
| Lovex S070 | <<locked>> | 96% | 49,240 psi | 89% | 2736 fps | 98.4% |
| Norma 201 | <<locked>> | 84% | 48,211 psi | 87% | 2667 fps | 100% |
| Norma 202 | <<locked>> | 84% | 48,414 psi | 88% | 2667 fps | 100% |
| Norma 203B | <<locked>> | 88% | 49,559 psi | 90% | 2749 fps | 100% |
| Norma 204 | <<locked>> | 96% | 47,500 psi | 86% | 2743 fps | 96.1% |
| Norma MRPᴾ | <<locked>> | 100% | 41,626 psi | 76% | 2746 fps | 96.6% |
| Norma URP | <<locked>> | 96% | 46,963 psi | 85% | 2759 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 88% | 49,617 psi | 90% | 2769 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 49,095 psi | 89% | 2808 fps | 99% |
| Ramshot TAC | <<locked>> | 82% | 48,167 psi | 87% | 2684 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 47,703 psi | 87% | 2703 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,839 psi | 65% | 1706 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 48,182 psi | 87% | 2697 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 46,862 psi | 85% | 2769 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 49,748 psi | 90% | 2854 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 46,746 psi | 85% | 2789 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 46,920 psi | 85% | 2812 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 82% | 49,429 psi | 90% | 2648 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 48,675 psi | 88% | 2664 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 49,806 psi | 90% | 2743 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 44,063 psi | 80% | 2713 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 92% | 47,659 psi | 86% | 2677 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 48,704 psi | 88% | 2703 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 84% | 48,240 psi | 88% | 2690 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 49,313 psi | 89% | 2697 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 49,240 psi | 89% | 2736 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 48,283 psi | 88% | 2759 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 46,572 psi | 85% | 2661 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 47,471 psi | 86% | 2690 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 49,719 psi | 90% | 2605 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 49,763 psi | 90% | 2605 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 48,675 psi | 88% | 2654 fps | 98% |
| Somchem S335 | <<locked>> | 84% | 49,182 psi | 89% | 2605 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 49,385 psi | 90% | 2703 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 47,369 psi | 86% | 2697 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,761 psi | 87% | 2805 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 44,614 psi | 81% | 2697 fps | 96.9% |
| Vihtavuori N133 | <<locked>> | 82% | 47,065 psi | 85% | 2549 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 48,095 psi | 87% | 2628 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 48,776 psi | 89% | 2644 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 48,385 psi | 88% | 2674 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 49,400 psi | 90% | 2753 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 48,660 psi | 88% | 2667 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 47,282 psi | 86% | 2648 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 48,385 psi | 88% | 2762 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,495 psi | 73% | 2703 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 49,559 psi | 90% | 2730 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 47,950 psi | 87% | 2710 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 47,384 psi | 86% | 2769 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,359 psi | 61% | 2644 fps | 99.6% |
| Winchester StaBALL Match | <<locked>> | 84% | 47,036 psi | 85% | 2697 fps | 100% |
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 2495 | <<locked>> | 80% | 39,871 psi | 72% | 2513 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,412 psi | 84% | 2651 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 42,003 psi | 76% | 2533 fps | 95.7% |
| Accurate 3100 | <<locked>> | 96% | 33,663 psi | 61% | 2497 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 37,739 psi | 68% | 2513 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 27,253 psi | 49% | 2349 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 43,366 psi | 79% | 2621 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 36,854 psi | 67% | 2480 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 98% | 43,743 psi | 79% | 2687 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,440 psi | 82% | 2625 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 45,556 psi | 83% | 2598 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,189 psi | 71% | 2657 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,434 psi | 66% | 2503 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,146 psi | 71% | 2566 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 28,471 psi | 52% | 2365 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 31,343 psi | 57% | 2484 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 98% | 42,801 psi | 78% | 2680 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 88% | 26,049 psi | 47% | 2333 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 92% | 31,444 psi | 57% | 2546 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,438 psi | 77% | 2628 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 36,027 psi | 65% | 2510 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 39,566 psi | 72% | 2530 fps | 95.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,019 psi | 80% | 2648 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,753 psi | 67% | 2510 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 36,361 psi | 66% | 2556 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 88% | 42,380 psi | 77% | 2625 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 43,758 psi | 79% | 2631 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 25,962 psi | 47% | 2270 fps | 96% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,566 psi | 72% | 2608 fps | 99.9% |
| Hodgdon Superformance | 52.8 gr | 88% | 38,435 psi | 70% | 2618 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,353 psi | 48% | 1490 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,105 psi | 76% | 2585 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 43,207 psi | 78% | 2615 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,667 psi | 70% | 2510 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,191 psi | 75% | 2530 fps | 96.4% |
| IMR 4350 | <<locked>> | 90% | 39,363 psi | 71% | 2552 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 38,682 psi | 70% | 2513 fps | 95.6% |
| IMR 4831 | <<locked>> | 82% | 28,645 psi | 52% | 2365 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 40,074 psi | 73% | 2592 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 45,440 psi | 82% | 2625 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,293 psi | 77% | 2595 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,497 psi | 79% | 2556 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 38,566 psi | 70% | 2513 fps | 99.8% |
| Lovex S065 | <<locked>> | 80% | 31,821 psi | 58% | 2369 fps | 95% |
| Lovex S070 | <<locked>> | 86% | 36,027 psi | 65% | 2487 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 42,598 psi | 77% | 2575 fps | 100% |
| Norma 202 | <<locked>> | 80% | 42,743 psi | 78% | 2579 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,508 psi | 70% | 2552 fps | 99.3% |
| Norma 204 | <<locked>> | 94% | 44,469 psi | 81% | 2687 fps | 95.3% |
| Norma MRP | <<locked>> | 98% | 38,841 psi | 70% | 2687 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 28,079 psi | 51% | 2352 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 37,855 psi | 69% | 2566 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 33,460 psi | 61% | 2497 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 45,281 psi | 82% | 2635 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,802 psi | 81% | 2657 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,716 psi | 48% | 1526 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 37,217 psi | 68% | 2490 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,843 psi | 74% | 2664 fps | 99.4% |
| ReloadSwiss RS 60 | 45.4 gr | 80% | 33,344 psi | 61% | 2543 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 29,211 psi | 53% | 2418 fps | 95.3% |
| ReloadSwiss RS 70 | 48.4 gr | 84% | 31,560 psi | 57% | 2474 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 46,369 psi | 84% | 2602 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,393 psi | 73% | 2526 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 33,794 psi | 61% | 2454 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 41,234 psi | 75% | 2657 fps | 95% |
| Rottweil R 907 | <<locked>> | 86% | 39,566 psi | 72% | 2530 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 31,821 psi | 58% | 2369 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,293 psi | 77% | 2595 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,566 psi | 70% | 2513 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 36,027 psi | 65% | 2487 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,737 psi | 63% | 2503 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,366 psi | 79% | 2608 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,829 psi | 76% | 2592 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,801 psi | 79% | 2516 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,376 psi | 66% | 2395 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 37,246 psi | 68% | 2454 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 43,613 psi | 79% | 2523 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,236 psi | 78% | 2605 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 34,838 psi | 63% | 2464 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 25,222 psi | 46% | 2310 fps | 97.3% |
| Somchem S385 | <<locked>> | 96% | 39,102 psi | 71% | 2595 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 44,092 psi | 80% | 2503 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,740 psi | 72% | 2500 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,408 psi | 73% | 2513 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,953 psi | 60% | 2398 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 29,356 psi | 53% | 2352 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 45,556 psi | 83% | 2621 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 38,827 psi | 70% | 2510 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 28,718 psi | 52% | 2356 fps | 95% |
| Vihtavuori N555 | <<locked>> | 88% | 27,572 psi | 50% | 2402 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,341 psi | 53% | 2333 fps | 97.6% |
| Winchester 748 | <<locked>> | 80% | 44,904 psi | 81% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 36,361 psi | 66% | 2556 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 92% | 25,918 psi | 47% | 2402 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,104 psi | 75% | 2595 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 114 powders for 7.5 x 55 Swiss loaded with the .308 | 180gr | Speer Magnum Tip Soft Point. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,854 fps; across all powders the maximum-charge window runs from 1,663 fps to 2,854 fps. Accurate 3100 gives the best case fill at 100 %, and 114 of the 114 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:15.0 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. ReloadSwiss RS 70, ReloadSwiss RS 60, Hodgdon Superformance rank at the top here: for 7.5 x 55 Swiss with the .308 | 180gr | Speer Magnum Tip Soft Point 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.