Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 167gr | TWENTY-NINE SILENTIO bullet and 94 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-17 and Alliant Power Pro 2000-MR.
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% | 47,529 psi | 86% | 2657 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 48,950 psi | 89% | 2726 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 47,732 psi | 87% | 2717 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 46,789 psi | 85% | 2736 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 47,674 psi | 87% | 2759 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,166 psi | 84% | 2822 fps | 98.9% |
| ADI AR 2206H | <<locked>> | 88% | 49,516 psi | 90% | 2795 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 47,601 psi | 86% | 2746 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 86% | 48,979 psi | 89% | 2749 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 48,573 psi | 88% | 2730 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 48,486 psi | 88% | 2900 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 49,734 psi | 90% | 2812 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 47,311 psi | 86% | 2782 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,180 psi | 84% | 2831 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 96% | 46,659 psi | 85% | 2871 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 32,561 psi | 59% | 2569 fps | 97.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 48,863 psi | 89% | 2805 fps | 99.2% |
| Bofors RP3 | <<locked>> | 94% | 49,748 psi | 90% | 2825 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 47,819 psi | 87% | 2736 fps | 95.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 48,080 psi | 87% | 2690 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 47,514 psi | 86% | 2782 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 48,631 psi | 88% | 2864 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 82% | 49,342 psi | 90% | 2746 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 48,109 psi | 87% | 2785 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 98% | 46,760 psi | 85% | 2822 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 86% | 46,963 psi | 85% | 2759 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,366 psi | 77% | 2713 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 48,443 psi | 88% | 2835 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 47,688 psi | 87% | 2844 fps | 95.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,824 psi | 63% | 1693 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 48,283 psi | 88% | 2762 fps | 99.8% |
| IMR 3031 | <<locked>> | 88% | 49,153 psi | 89% | 2789 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 47,065 psi | 85% | 2726 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 88% | 47,761 psi | 87% | 2703 fps | 96.4% |
| IMR 4350ᴾ | <<locked>> | 100% | 47,601 psi | 86% | 2759 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 96% | 49,763 psi | 90% | 2772 fps | 96.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,280 psi | 80% | 2766 fps | 98.6% |
| IMR 4895 | <<locked>> | 90% | 48,457 psi | 88% | 2815 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 86% | 48,979 psi | 89% | 2749 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 48,617 psi | 88% | 2733 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 48,428 psi | 88% | 2772 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 47,094 psi | 85% | 2680 fps | 99.5% |
| Lovex S062 | <<locked>> | 92% | 49,574 psi | 90% | 2776 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 48,472 psi | 88% | 2762 fps | 98% |
| Lovex S070ᴾ | <<locked>> | 100% | 49,023 psi | 89% | 2792 fps | 97.1% |
| Norma 201 | <<locked>> | 88% | 48,675 psi | 88% | 2746 fps | 100% |
| Norma 202 | <<locked>> | 88% | 48,805 psi | 89% | 2749 fps | 100% |
| Norma 203B | <<locked>> | 92% | 49,777 psi | 90% | 2825 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 46,354 psi | 84% | 2818 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 92% | 49,661 psi | 90% | 2844 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 45,701 psi | 83% | 2808 fps | 97.2% |
| Ramshot TAC | <<locked>> | 86% | 49,139 psi | 89% | 2762 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 86% | 48,312 psi | 88% | 2785 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 82% | 46,963 psi | 85% | 2703 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,070 psi | 64% | 1732 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 48,631 psi | 88% | 2736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 48,602 psi | 88% | 2762 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 49,864 psi | 90% | 2894 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 49,850 psi | 90% | 2930 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,180 psi | 84% | 2844 fps | 98.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,384 psi | 86% | 2871 fps | 98.4% |
| Rottweil R 901 | <<locked>> | 86% | 49,705 psi | 90% | 2730 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 48,921 psi | 89% | 2740 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 49,617 psi | 90% | 2815 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 47,819 psi | 87% | 2736 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 98% | 48,472 psi | 88% | 2762 fps | 98% |
| Shooters World Match Rifle | <<locked>> | 88% | 48,428 psi | 88% | 2772 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 49,574 psi | 90% | 2776 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 49,023 psi | 89% | 2792 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 47,964 psi | 87% | 2825 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 47,166 psi | 86% | 2736 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 48,080 psi | 87% | 2769 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 47,471 psi | 86% | 2641 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 47,050 psi | 85% | 2641 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 48,588 psi | 88% | 2713 fps | 96.7% |
| Somchem S321 | <<locked>> | 84% | 49,617 psi | 90% | 2782 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 49,850 psi | 90% | 2690 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 46,601 psi | 85% | 2730 fps | 99.5% |
| Somchem S355 | <<locked>> | 94% | 47,195 psi | 86% | 2766 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,350 psi | 75% | 2769 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 82% | 47,572 psi | 86% | 2615 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 47,529 psi | 86% | 2631 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 48,138 psi | 87% | 2710 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 49,037 psi | 89% | 2723 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 48,602 psi | 88% | 2749 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,704 psi | 88% | 2808 fps | 99% |
| Vihtavuori N530 | <<locked>> | 86% | 49,298 psi | 89% | 2749 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 47,340 psi | 86% | 2726 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,732 psi | 87% | 2818 fps | 98.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 34,287 psi | 62% | 2638 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 46,746 psi | 85% | 2746 fps | 99.8% |
| Winchester 748 | <<locked>> | 86% | 48,486 psi | 88% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 47,021 psi | 85% | 2825 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 88% | 47,514 psi | 86% | 2776 fps | 99.8% |
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% | 42,119 psi | 76% | 2572 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 45,687 psi | 83% | 2677 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,621 psi | 63% | 2497 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,973 psi | 74% | 2638 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 32,764 psi | 59% | 2487 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 32,590 psi | 59% | 2552 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 38,725 psi | 70% | 2598 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 80% | 33,011 psi | 60% | 2454 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,727 psi | 74% | 2608 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 39,639 psi | 72% | 2595 fps | 100% |
| Alliant Power Pro 2000-MR | 43.4 gr | 80% | 34,722 psi | 63% | 2608 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,966 psi | 58% | 2470 fps | 97.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,621 psi | 63% | 2530 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 32,256 psi | 59% | 2520 fps | 95% |
| Alliant Reloder-17 | 43.8 gr | 82% | 29,530 psi | 54% | 2480 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 96% | 28,921 psi | 52% | 2464 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,565 psi | 68% | 2595 fps | 97.2% |
| Bofors RP3 | <<locked>> | 80% | 31,241 psi | 57% | 2470 fps | 97.6% |
| Bofors RP7 | <<locked>> | 94% | 44,976 psi | 82% | 2687 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,612 psi | 77% | 2595 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,667 psi | 70% | 2625 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,380 psi | 77% | 2753 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 80% | 46,267 psi | 84% | 2700 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 34,650 psi | 63% | 2523 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 94% | 41,060 psi | 75% | 2710 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 38,972 psi | 71% | 2608 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 27,557 psi | 50% | 2369 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,853 psi | 63% | 2575 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 96% | 44,483 psi | 81% | 2785 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,730 psi | 47% | 1509 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,405 psi | 68% | 2559 fps | 98.5% |
| IMR 3031 | <<locked>> | 80% | 37,913 psi | 69% | 2605 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,577 psi | 63% | 2484 fps | 96.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 42,032 psi | 76% | 2598 fps | 95% |
| IMR 4350 | <<locked>> | 98% | 44,512 psi | 81% | 2703 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 44,150 psi | 80% | 2674 fps | 95.5% |
| IMR 4831 | <<locked>> | 90% | 31,981 psi | 58% | 2513 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 35,389 psi | 64% | 2562 fps | 97.8% |
| IMR 8208 XBR | <<locked>> | 80% | 40,727 psi | 74% | 2608 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 45,382 psi | 82% | 2680 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 36,970 psi | 67% | 2572 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 39,233 psi | 71% | 2533 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 34,069 psi | 62% | 2487 fps | 98.5% |
| Lovex S065 | <<locked>> | 90% | 37,971 psi | 69% | 2566 fps | 95.5% |
| Lovex S070 | <<locked>> | 94% | 40,756 psi | 74% | 2644 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 37,971 psi | 69% | 2552 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 37,913 psi | 69% | 2562 fps | 100% |
| Norma 203B | <<locked>> | 80% | 33,997 psi | 62% | 2520 fps | 97.3% |
| Norma URP | <<locked>> | 90% | 33,692 psi | 61% | 2559 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 33,315 psi | 60% | 2526 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 96% | 40,248 psi | 73% | 2703 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 40,379 psi | 73% | 2602 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,479 psi | 72% | 2625 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,961 psi | 80% | 2651 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,020 psi | 47% | 1549 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,440 psi | 82% | 2684 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 40,234 psi | 73% | 2612 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 35,592 psi | 65% | 2621 fps | 97.3% |
| ReloadSwiss RS 60 | 42.7 gr | 80% | 29,428 psi | 53% | 2490 fps | 98.3% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 32,909 psi | 60% | 2569 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 36,201 psi | 66% | 2635 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 41,626 psi | 76% | 2595 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,085 psi | 65% | 2507 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 29,370 psi | 53% | 2415 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 94% | 44,976 psi | 82% | 2687 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 37,971 psi | 69% | 2566 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,970 psi | 67% | 2572 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 34,069 psi | 62% | 2487 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 94% | 40,756 psi | 74% | 2644 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 30,661 psi | 56% | 2464 fps | 95.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,363 psi | 70% | 2572 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,173 psi | 67% | 2566 fps | 98% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,407 psi | 72% | 2507 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,401 psi | 59% | 2382 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 42,569 psi | 77% | 2615 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 43,671 psi | 79% | 2684 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 39,102 psi | 71% | 2516 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,247 psi | 69% | 2579 fps | 98.2% |
| Somchem S355 | <<locked>> | 80% | 30,632 psi | 56% | 2428 fps | 96.7% |
| Somchem S365 | <<locked>> | 84% | 25,092 psi | 46% | 2356 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 44,701 psi | 81% | 2572 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,537 psi | 72% | 2503 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,867 psi | 63% | 2490 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,781 psi | 65% | 2500 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 28,921 psi | 52% | 2365 fps | 97.5% |
| Vihtavuori N160 | <<locked>> | 88% | 33,214 psi | 60% | 2507 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 40,538 psi | 74% | 2602 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 80% | 34,330 psi | 62% | 2490 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 32,474 psi | 59% | 2513 fps | 95% |
| Vihtavuori N555 | <<locked>> | 96% | 30,284 psi | 55% | 2536 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 27,775 psi | 50% | 2333 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 39,566 psi | 72% | 2644 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 41,292 psi | 75% | 2717 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,332 psi | 66% | 2569 fps | 98.4% |
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 94 powders for 7.5 x 55 Swiss loaded with the .308 | 167gr | TWENTY-NINE SILENTIO. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,930 fps; across all powders the maximum-charge window runs from 1,693 fps to 2,930 fps. Accurate 4350 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 167.0 gr projectile in 0.308" calls for a 1:11.5 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. ReloadSwiss RS 60, Alliant Reloder-17, Alliant Power Pro 2000-MR rank at the top here: for 7.5 x 55 Swiss with the .308 | 167gr | TWENTY-NINE SILENTIO 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.