Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 186gr | Peregrine VRG-2 bullet and 97 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance 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>> | 82% | 48,950 psi | 89% | 2552 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 46,847 psi | 85% | 2579 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 48,733 psi | 88% | 2641 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 46,876 psi | 85% | 2575 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 37,347 psi | 68% | 2533 fps | 97% |
| Accurate 4064 | <<locked>> | 88% | 46,949 psi | 85% | 2625 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 49,385 psi | 90% | 2753 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 48,254 psi | 88% | 2657 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 49,414 psi | 90% | 2664 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 45,948 psi | 83% | 2684 fps | 96% |
| ADI Benchmark 8208 | <<locked>> | 82% | 47,413 psi | 86% | 2608 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 47,616 psi | 86% | 2582 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 47,195 psi | 86% | 2769 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 48,892 psi | 89% | 2680 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 49,414 psi | 90% | 2700 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 48,544 psi | 88% | 2766 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 48,936 psi | 89% | 2795 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 44,817 psi | 81% | 2677 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,274 psi | 66% | 2572 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,147 psi | 73% | 2723 fps | 99% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 47,703 psi | 87% | 2674 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 48,921 psi | 89% | 2694 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 49,719 psi | 90% | 2667 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 82% | 49,458 psi | 90% | 2595 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 49,400 psi | 90% | 2687 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 46,789 psi | 85% | 2654 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 96% | 49,443 psi | 90% | 2759 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 92% | 47,500 psi | 86% | 2671 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 48,689 psi | 88% | 2667 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,485 psi | 86% | 2687 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 47,616 psi | 86% | 2700 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 46,412 psi | 84% | 2733 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,041 psi | 64% | 1627 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 47,007 psi | 85% | 2628 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 48,399 psi | 88% | 2648 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 48,660 psi | 88% | 2641 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 48,936 psi | 89% | 2625 fps | 98.2% |
| IMR 4350 | <<locked>> | 98% | 49,632 psi | 90% | 2690 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,733 psi | 88% | 2654 fps | 98.2% |
| IMR 4831 | <<locked>> | 98% | 47,166 psi | 86% | 2700 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 47,659 psi | 86% | 2684 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 47,413 psi | 86% | 2608 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 47,427 psi | 86% | 2635 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 48,385 psi | 88% | 2592 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 48,254 psi | 88% | 2635 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 47,587 psi | 86% | 2644 fps | 99.1% |
| Lovex S070 | <<locked>> | 96% | 48,196 psi | 87% | 2677 fps | 98.4% |
| Norma 201 | <<locked>> | 84% | 46,949 psi | 85% | 2605 fps | 100% |
| Norma 202 | <<locked>> | 84% | 47,601 psi | 86% | 2608 fps | 100% |
| Norma 203B | <<locked>> | 88% | 48,631 psi | 88% | 2687 fps | 100% |
| Norma 204 | <<locked>> | 96% | 46,717 psi | 85% | 2684 fps | 96.2% |
| Norma MRPᴾ | <<locked>> | 100% | 40,669 psi | 74% | 2687 fps | 96.7% |
| Norma URP | <<locked>> | 98% | 48,965 psi | 89% | 2746 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 48,950 psi | 89% | 2713 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 48,066 psi | 87% | 2746 fps | 99% |
| Ramshot TAC | <<locked>> | 82% | 47,384 psi | 86% | 2628 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 46,862 psi | 85% | 2644 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,578 psi | 65% | 1670 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,456 psi | 86% | 2641 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 49,298 psi | 89% | 2759 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 48,849 psi | 89% | 2792 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 49,168 psi | 89% | 2779 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 49,443 psi | 90% | 2808 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 48,138 psi | 87% | 2585 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 47,471 psi | 86% | 2602 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 48,747 psi | 88% | 2684 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 43,236 psi | 78% | 2654 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 94% | 49,719 psi | 90% | 2667 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 94% | 47,587 psi | 86% | 2644 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 47,427 psi | 86% | 2635 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 48,254 psi | 88% | 2635 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 48,196 psi | 87% | 2677 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 47,282 psi | 86% | 2697 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 48,704 psi | 88% | 2654 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 49,719 psi | 90% | 2680 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 48,892 psi | 89% | 2546 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 48,892 psi | 89% | 2549 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,616 psi | 86% | 2595 fps | 98% |
| Somchem S335 | <<locked>> | 84% | 48,066 psi | 87% | 2546 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 48,646 psi | 88% | 2648 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 49,559 psi | 90% | 2687 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,833 psi | 85% | 2746 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 43,468 psi | 79% | 2635 fps | 96.9% |
| Vihtavuori N133 | <<locked>> | 84% | 49,197 psi | 89% | 2533 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 47,181 psi | 86% | 2569 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 48,124 psi | 87% | 2589 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 47,558 psi | 86% | 2615 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 48,486 psi | 88% | 2694 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 47,616 psi | 86% | 2608 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 49,240 psi | 89% | 2631 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 47,485 psi | 86% | 2703 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,189 psi | 71% | 2638 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 48,631 psi | 88% | 2671 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 47,282 psi | 86% | 2654 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 49,443 psi | 90% | 2759 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,314 psi | 59% | 2582 fps | 99.6% |
| Winchester StaBALL Match | <<locked>> | 86% | 49,371 psi | 90% | 2687 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 2015 | <<locked>> | 80% | 45,977 psi | 83% | 2513 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,363 psi | 70% | 2448 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,513 psi | 83% | 2595 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 41,046 psi | 74% | 2477 fps | 95.7% |
| Accurate 3100 | <<locked>> | 96% | 32,474 psi | 59% | 2434 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 36,289 psi | 66% | 2448 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 27,978 psi | 51% | 2336 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 42,482 psi | 77% | 2562 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 36,027 psi | 65% | 2425 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 98% | 42,975 psi | 78% | 2631 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,628 psi | 81% | 2566 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 44,556 psi | 81% | 2539 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,305 psi | 70% | 2598 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,491 psi | 64% | 2444 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,232 psi | 69% | 2507 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 27,630 psi | 50% | 2306 fps | 95.1% |
| Alliant Reloder-17 | 44.5 gr | 80% | 30,574 psi | 55% | 2428 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 98% | 41,989 psi | 76% | 2625 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 88% | 25,106 psi | 46% | 2270 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 92% | 30,458 psi | 55% | 2487 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,553 psi | 75% | 2569 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 34,737 psi | 63% | 2444 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 38,537 psi | 70% | 2470 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,354 psi | 84% | 2549 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,960 psi | 78% | 2589 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 35,810 psi | 65% | 2451 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 35,273 psi | 64% | 2493 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 88% | 41,611 psi | 76% | 2566 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 42,888 psi | 78% | 2572 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 25,048 psi | 45% | 2211 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,827 psi | 70% | 2549 fps | 99.9% |
| Hodgdon Superformance | 51.7 gr | 88% | 37,536 psi | 68% | 2559 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,150 psi | 47% | 1457 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,089 psi | 75% | 2526 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 42,482 psi | 77% | 2559 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,811 psi | 69% | 2451 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 40,466 psi | 73% | 2474 fps | 96.4% |
| IMR 4350 | <<locked>> | 90% | 38,624 psi | 70% | 2497 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 38,000 psi | 69% | 2457 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 27,717 psi | 50% | 2306 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 39,160 psi | 71% | 2533 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 44,628 psi | 81% | 2566 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,292 psi | 75% | 2539 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,685 psi | 77% | 2497 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 37,550 psi | 68% | 2454 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 32,750 psi | 59% | 2356 fps | 95.7% |
| Lovex S070 | <<locked>> | 86% | 35,172 psi | 64% | 2431 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 41,524 psi | 75% | 2513 fps | 100% |
| Norma 202 | <<locked>> | 80% | 41,829 psi | 76% | 2520 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,579 psi | 68% | 2493 fps | 99.3% |
| Norma 204 | <<locked>> | 94% | 43,671 psi | 79% | 2631 fps | 95.4% |
| Norma MRP | <<locked>> | 98% | 38,014 psi | 69% | 2628 fps | 95.8% |
| Norma URP | <<locked>> | 82% | 29,124 psi | 53% | 2349 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 36,927 psi | 67% | 2507 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 32,401 psi | 59% | 2434 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 44,425 psi | 81% | 2579 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,874 psi | 80% | 2595 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,484 psi | 48% | 1493 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 36,463 psi | 66% | 2438 fps | 96.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,030 psi | 73% | 2605 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,619 psi | 59% | 2487 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 28,195 psi | 51% | 2356 fps | 95.2% |
| ReloadSwiss RS 70 | 47.4 gr | 84% | 30,748 psi | 56% | 2415 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 45,353 psi | 82% | 2543 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,479 psi | 72% | 2470 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 32,663 psi | 59% | 2395 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 40,321 psi | 73% | 2598 fps | 95% |
| Rottweil R 907 | <<locked>> | 86% | 38,537 psi | 70% | 2470 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 82% | 32,750 psi | 59% | 2356 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,292 psi | 75% | 2539 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,550 psi | 68% | 2454 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 35,172 psi | 64% | 2431 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,968 psi | 62% | 2448 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,569 psi | 77% | 2552 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,060 psi | 75% | 2536 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,134 psi | 78% | 2461 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,694 psi | 65% | 2343 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 36,463 psi | 66% | 2402 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 42,670 psi | 77% | 2464 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,322 psi | 77% | 2546 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 33,823 psi | 61% | 2405 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 24,149 psi | 44% | 2244 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 38,116 psi | 69% | 2536 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 43,482 psi | 79% | 2451 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,899 psi | 71% | 2444 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,523 psi | 72% | 2454 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,995 psi | 58% | 2339 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 28,485 psi | 52% | 2297 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 44,469 psi | 81% | 2559 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 38,014 psi | 69% | 2454 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 29,776 psi | 54% | 2352 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 88% | 26,469 psi | 48% | 2336 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,485 psi | 52% | 2277 fps | 97.6% |
| Winchester 748 | <<locked>> | 80% | 44,179 psi | 80% | 2605 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 35,505 psi | 64% | 2500 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 92% | 24,918 psi | 45% | 2336 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,364 psi | 73% | 2539 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 116 powders for 7.5 x 55 Swiss loaded with the .308 | 186gr | Peregrine VRG-2. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,808 fps; across all powders the maximum-charge window runs from 1,627 fps to 2,808 fps. Accurate 3100 gives the best case fill at 100 %, and 116 of the 116 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 186.0 gr projectile in 0.308" calls for a 1:13.5 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for 7.5 x 55 Swiss with the .308 | 186gr | Peregrine VRG-2 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.