Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 171gr | Peregrine VLR-5 bullet and 96 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>> | 84% | 47,036 psi | 85% | 2625 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 48,138 psi | 87% | 2690 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 46,934 psi | 85% | 2684 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 49,545 psi | 90% | 2749 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 48,269 psi | 88% | 2674 fps | 95.9% |
| Accurate 4064 | <<locked>> | 92% | 47,021 psi | 85% | 2726 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 45,905 psi | 83% | 2792 fps | 99.1% |
| ADI AR 2206H | <<locked>> | 88% | 49,284 psi | 89% | 2766 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 47,137 psi | 86% | 2713 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 86% | 48,762 psi | 88% | 2723 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 48,022 psi | 87% | 2694 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 49,690 psi | 90% | 2815 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 48,385 psi | 88% | 2871 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 49,226 psi | 89% | 2779 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 47,036 psi | 85% | 2753 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,774 psi | 83% | 2799 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 49,632 psi | 90% | 2897 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 32,111 psi | 58% | 2539 fps | 97.3% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 48,747 psi | 88% | 2779 fps | 99.4% |
| Bofors RP3 | <<locked>> | 94% | 49,095 psi | 89% | 2792 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 47,253 psi | 86% | 2707 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 47,834 psi | 87% | 2661 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 46,978 psi | 85% | 2746 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 48,573 psi | 88% | 2838 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 82% | 49,168 psi | 89% | 2717 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 47,529 psi | 86% | 2753 fps | 98.8% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 49,690 psi | 90% | 2844 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 88% | 49,705 psi | 90% | 2776 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,887 psi | 76% | 2680 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 48,051 psi | 87% | 2802 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 47,616 psi | 86% | 2822 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,548 psi | 63% | 1670 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 47,819 psi | 87% | 2730 fps | 99.9% |
| IMR 3031 | <<locked>> | 88% | 48,936 psi | 89% | 2759 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 49,603 psi | 90% | 2743 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 47,268 psi | 86% | 2671 fps | 96.6% |
| IMR 4350ᴾ | <<locked>> | 100% | 47,210 psi | 86% | 2730 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 96% | 49,400 psi | 90% | 2743 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 43,743 psi | 79% | 2736 fps | 98.8% |
| IMR 4895 | <<locked>> | 90% | 48,182 psi | 87% | 2785 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 48,762 psi | 88% | 2723 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 48,109 psi | 87% | 2700 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 47,747 psi | 87% | 2736 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 49,835 psi | 90% | 2700 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 48,907 psi | 89% | 2740 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 48,240 psi | 88% | 2736 fps | 98.2% |
| Lovex S070ᴾ | <<locked>> | 100% | 48,486 psi | 88% | 2762 fps | 97.3% |
| Norma 201 | <<locked>> | 88% | 47,906 psi | 87% | 2710 fps | 100% |
| Norma 202 | <<locked>> | 88% | 48,196 psi | 87% | 2717 fps | 100% |
| Norma 203B | <<locked>> | 92% | 49,269 psi | 89% | 2792 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 45,905 psi | 83% | 2785 fps | 99% |
| Ramshot Big Game | <<locked>> | 92% | 49,298 psi | 89% | 2812 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 45,310 psi | 82% | 2779 fps | 97.4% |
| Ramshot TAC | <<locked>> | 86% | 48,936 psi | 89% | 2736 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 47,819 psi | 87% | 2749 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 49,603 psi | 90% | 2720 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,737 psi | 63% | 1709 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 48,080 psi | 87% | 2700 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 48,414 psi | 88% | 2736 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 49,777 psi | 90% | 2864 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 49,472 psi | 90% | 2897 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,672 psi | 83% | 2812 fps | 98.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,007 psi | 85% | 2841 fps | 98.5% |
| Rottweil R 901 | <<locked>> | 86% | 49,052 psi | 89% | 2697 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 48,182 psi | 87% | 2707 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 49,023 psi | 89% | 2779 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 47,253 psi | 86% | 2707 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 48,240 psi | 88% | 2736 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 47,747 psi | 87% | 2736 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 48,907 psi | 89% | 2740 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 48,486 psi | 88% | 2762 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 47,877 psi | 87% | 2799 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 46,557 psi | 84% | 2703 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 47,572 psi | 86% | 2736 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 47,137 psi | 86% | 2612 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 49,705 psi | 90% | 2651 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 48,399 psi | 88% | 2687 fps | 96.9% |
| Somchem S321 | <<locked>> | 84% | 49,385 psi | 90% | 2753 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 49,226 psi | 89% | 2654 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 49,763 psi | 90% | 2753 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 46,876 psi | 85% | 2736 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,814 psi | 74% | 2736 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 47,282 psi | 86% | 2582 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 47,297 psi | 86% | 2602 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 47,485 psi | 86% | 2677 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 48,849 psi | 89% | 2694 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 48,080 psi | 87% | 2717 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,646 psi | 88% | 2785 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 86% | 48,805 psi | 89% | 2717 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 47,065 psi | 85% | 2694 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,543 psi | 86% | 2792 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 33,852 psi | 61% | 2608 fps | 97.2% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,661 psi | 90% | 2769 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 48,008 psi | 87% | 2762 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 49,690 psi | 90% | 2844 fps | 97.5% |
| Winchester StaBALL Match | <<locked>> | 88% | 47,065 psi | 85% | 2743 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% | 41,278 psi | 75% | 2536 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 44,875 psi | 81% | 2641 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,388 psi | 61% | 2454 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,176 psi | 73% | 2602 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 45,063 psi | 82% | 2618 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 31,618 psi | 57% | 2444 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 29,863 psi | 54% | 2467 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 38,029 psi | 69% | 2562 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 32,416 psi | 59% | 2418 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,132 psi | 73% | 2572 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 39,262 psi | 71% | 2562 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,528 psi | 84% | 2766 fps | 99.9% |
| Alliant Power Pro 2000-MR | 43.3 gr | 80% | 34,389 psi | 62% | 2579 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,256 psi | 57% | 2434 fps | 97.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 33,939 psi | 62% | 2497 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 88% | 31,676 psi | 57% | 2487 fps | 95.2% |
| Alliant Reloder-17 | 42.6 gr | 80% | 27,151 psi | 49% | 2392 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 96% | 28,427 psi | 52% | 2434 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,999 psi | 67% | 2562 fps | 97.3% |
| Bofors RP3 | <<locked>> | 80% | 30,385 psi | 55% | 2431 fps | 97.6% |
| Bofors RP7 | <<locked>> | 94% | 44,382 psi | 81% | 2654 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,235 psi | 77% | 2566 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,247 psi | 69% | 2595 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,148 psi | 76% | 2723 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 80% | 46,035 psi | 84% | 2671 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 33,910 psi | 62% | 2487 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 94% | 40,799 psi | 74% | 2684 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 38,305 psi | 70% | 2572 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 26,847 psi | 49% | 2333 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,214 psi | 62% | 2539 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 96% | 44,092 psi | 80% | 2759 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,628 psi | 47% | 1493 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,057 psi | 67% | 2533 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 37,217 psi | 68% | 2569 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,910 psi | 62% | 2448 fps | 97% |
| IMR 4166 Enduron | <<locked>> | 84% | 41,771 psi | 76% | 2572 fps | 95.2% |
| IMR 4350 | <<locked>> | 98% | 44,396 psi | 81% | 2680 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 41,075 psi | 75% | 2592 fps | 95% |
| IMR 4831 | <<locked>> | 90% | 31,517 psi | 57% | 2484 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 34,708 psi | 63% | 2526 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 80% | 40,132 psi | 73% | 2572 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 44,860 psi | 81% | 2651 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 36,187 psi | 66% | 2536 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 38,856 psi | 71% | 2507 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 33,504 psi | 61% | 2454 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 35,244 psi | 64% | 2490 fps | 95% |
| Lovex S070 | <<locked>> | 94% | 40,089 psi | 73% | 2612 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 37,101 psi | 67% | 2516 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 37,231 psi | 68% | 2530 fps | 100% |
| Norma 203B | <<locked>> | 80% | 33,301 psi | 60% | 2487 fps | 97.4% |
| Norma URP | <<locked>> | 88% | 31,183 psi | 57% | 2477 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 32,909 psi | 60% | 2497 fps | 97% |
| Ramshot Hunter | <<locked>> | 94% | 37,376 psi | 68% | 2618 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 40,059 psi | 73% | 2575 fps | 96.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,131 psi | 71% | 2595 fps | 98.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,410 psi | 79% | 2618 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,643 psi | 47% | 1526 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,121 psi | 82% | 2654 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 39,639 psi | 72% | 2579 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 34,940 psi | 63% | 2585 fps | 97.4% |
| ReloadSwiss RS 60 | 42.6 gr | 80% | 28,950 psi | 53% | 2461 fps | 98.5% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 32,489 psi | 59% | 2543 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 35,665 psi | 65% | 2605 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 40,828 psi | 74% | 2559 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 35,418 psi | 64% | 2474 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 28,703 psi | 52% | 2382 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 94% | 44,382 psi | 81% | 2654 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 35,244 psi | 64% | 2490 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,187 psi | 66% | 2536 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 33,504 psi | 61% | 2454 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 94% | 40,089 psi | 73% | 2612 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 30,008 psi | 54% | 2428 fps | 96% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 37,913 psi | 69% | 2543 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,550 psi | 66% | 2530 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,001 psi | 71% | 2477 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,952 psi | 58% | 2352 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 42,003 psi | 76% | 2582 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 43,004 psi | 78% | 2651 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 38,334 psi | 70% | 2480 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 37,681 psi | 68% | 2546 fps | 98.3% |
| Somchem S355 | <<locked>> | 80% | 29,834 psi | 54% | 2392 fps | 96.8% |
| Somchem S365 | <<locked>> | 84% | 24,337 psi | 44% | 2316 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 44,338 psi | 80% | 2539 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,189 psi | 71% | 2474 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,330 psi | 62% | 2457 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,375 psi | 64% | 2467 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 28,340 psi | 51% | 2333 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 88% | 32,808 psi | 60% | 2480 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 39,871 psi | 72% | 2566 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 33,866 psi | 61% | 2461 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 31,807 psi | 58% | 2480 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 96% | 29,718 psi | 54% | 2503 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 27,296 psi | 50% | 2303 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 39,001 psi | 71% | 2608 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 40,799 psi | 74% | 2684 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,737 psi | 65% | 2533 fps | 98.5% |
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 108 powders for 7.5 x 55 Swiss loaded with the .308 | 171gr | Peregrine VLR-5. Alliant Reloder-17 delivers the highest muzzle velocity at 2,897 fps; across all powders the maximum-charge window runs from 1,670 fps to 2,897 fps. Accurate 3100 gives the best case fill at 100 %, and 108 of the 108 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 171.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, 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 Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 7.5 x 55 Swiss with the .308 | 171gr | Peregrine VLR-5 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 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.