Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 153gr | TWENTY-NINE SILENTIO bullet and 92 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 Power Pro 2000-MR and ReloadSwiss RS 52.
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 2015 | <<locked>> | 86% | 48,675 psi | 88% | 2808 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 46,746 psi | 85% | 2825 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 48,559 psi | 88% | 2867 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 47,863 psi | 87% | 2884 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 48,631 psi | 88% | 2910 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 43,816 psi | 80% | 2907 fps | 97.9% |
| ADI AR 2206H | <<locked>> | 88% | 47,659 psi | 86% | 2894 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 94% | 48,573 psi | 88% | 2887 fps | 98.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 46,992 psi | 85% | 2848 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 88% | 49,400 psi | 90% | 2881 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 47,805 psi | 87% | 2949 fps | 99.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 49,690 psi | 90% | 3048 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 47,471 psi | 86% | 2910 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 82% | 48,530 psi | 88% | 2815 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 48,370 psi | 88% | 2930 fps | 99.1% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 44,280 psi | 80% | 2917 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 98% | 47,572 psi | 86% | 3015 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 46,847 psi | 85% | 2900 fps | 98.4% |
| Bofors RP3 | <<locked>> | 94% | 47,529 psi | 86% | 2923 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 49,153 psi | 89% | 2838 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 48,530 psi | 88% | 2930 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 46,688 psi | 85% | 2963 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 82% | 47,369 psi | 86% | 2851 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 48,269 psi | 88% | 2877 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 49,037 psi | 89% | 2930 fps | 98.2% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 47,572 psi | 86% | 2959 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 88% | 47,993 psi | 87% | 2907 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 40,524 psi | 74% | 2795 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 49,284 psi | 89% | 2982 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,330 psi | 62% | 1775 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 49,327 psi | 90% | 2910 fps | 99.6% |
| IMR 3031 | <<locked>> | 90% | 49,864 psi | 90% | 2940 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 48,095 psi | 87% | 2871 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 90% | 48,849 psi | 89% | 2844 fps | 95.8% |
| IMR 4198 | <<locked>> | 82% | 49,182 psi | 89% | 2776 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 41,974 psi | 76% | 2851 fps | 97.5% |
| IMR 4895 | <<locked>> | 92% | 49,530 psi | 90% | 2966 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 86% | 46,992 psi | 85% | 2848 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 84% | 49,850 psi | 90% | 2884 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 49,429 psi | 90% | 2920 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 48,153 psi | 87% | 2825 fps | 99.2% |
| Lovex S062 | <<locked>> | 92% | 47,500 psi | 86% | 2874 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 49,414 psi | 90% | 2904 fps | 97.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 46,847 psi | 85% | 2877 fps | 95.8% |
| Norma 201 | <<locked>> | 90% | 49,530 psi | 90% | 2890 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 49,864 psi | 90% | 2900 fps | 100% |
| Norma 203B | <<locked>> | 92% | 47,543 psi | 86% | 2920 fps | 99.3% |
| Norma URPᴾ | <<locked>> | 100% | 44,135 psi | 80% | 2904 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 92% | 47,442 psi | 86% | 2936 fps | 99.2% |
| Ramshot TAC | <<locked>> | 86% | 47,442 psi | 86% | 2858 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 88% | 49,342 psi | 90% | 2930 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 84% | 47,993 psi | 87% | 2844 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,751 psi | 63% | 1821 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 49,647 psi | 90% | 2884 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 49,806 psi | 90% | 2907 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 47,630 psi | 86% | 2989 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 47,543 psi | 86% | 3025 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 43,830 psi | 80% | 2927 fps | 97.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 45,295 psi | 82% | 2946 fps | 97% |
| Rottweil R 901 | <<locked>> | 86% | 47,848 psi | 87% | 2835 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 49,734 psi | 90% | 2884 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 47,079 psi | 85% | 2907 fps | 99.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 49,414 psi | 90% | 2904 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 90% | 49,429 psi | 90% | 2920 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 47,500 psi | 86% | 2874 fps | 99.8% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 46,847 psi | 85% | 2877 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 49,414 psi | 90% | 2848 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 48,979 psi | 89% | 2972 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 49,313 psi | 89% | 2831 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 48,225 psi | 88% | 2877 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 49,124 psi | 89% | 2917 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 48,718 psi | 88% | 2792 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 47,906 psi | 87% | 2785 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 49,705 psi | 90% | 2851 fps | 96.1% |
| Somchem S321 | <<locked>> | 84% | 47,572 psi | 86% | 2881 fps | 99.9% |
| Somchem S335 | <<locked>> | 88% | 47,863 psi | 87% | 2792 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 47,892 psi | 87% | 2877 fps | 99.2% |
| Somchem S355 | <<locked>> | 96% | 48,225 psi | 88% | 2913 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,291 psi | 71% | 2851 fps | 99.4% |
| Vihtavuori N130 | <<locked>> | 84% | 48,660 psi | 88% | 2762 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 48,675 psi | 88% | 2782 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 48,878 psi | 89% | 2861 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 47,050 psi | 85% | 2828 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 49,545 psi | 90% | 2894 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 46,673 psi | 85% | 2900 fps | 98.1% |
| Vihtavuori N530 | <<locked>> | 86% | 47,181 psi | 86% | 2848 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 92% | 48,356 psi | 88% | 2874 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 45,513 psi | 83% | 2907 fps | 97.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 47,805 psi | 87% | 2884 fps | 99.6% |
| Winchester 748 | <<locked>> | 88% | 49,284 psi | 89% | 2943 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 47,892 psi | 87% | 2963 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 90% | 48,472 psi | 88% | 2920 fps | 99.6% |
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% | 40,350 psi | 73% | 2671 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 43,714 psi | 79% | 2772 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 32,822 psi | 60% | 2585 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 39,015 psi | 71% | 2730 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 31,024 psi | 56% | 2569 fps | 99.3% |
| Accurate 4350 | <<locked>> | 94% | 35,389 psi | 64% | 2736 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 36,999 psi | 67% | 2680 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 33,634 psi | 61% | 2582 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,943 psi | 71% | 2697 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 80% | 37,623 psi | 68% | 2694 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 44,918 psi | 82% | 2897 fps | 99.3% |
| Alliant Power Pro 2000-MR | 45.7 gr | 82% | 35,520 psi | 64% | 2740 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 30,400 psi | 55% | 2546 fps | 96.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 45,614 psi | 83% | 2769 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 32,996 psi | 60% | 2608 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 92% | 34,751 psi | 63% | 2697 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 84% | 30,081 psi | 55% | 2602 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 35,882 psi | 65% | 2674 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 29,544 psi | 54% | 2543 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,176 psi | 75% | 2694 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,869 psi | 67% | 2710 fps | 98.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 40,582 psi | 74% | 2844 fps | 97.7% |
| Hodgdon H322 | <<locked>> | 80% | 44,222 psi | 80% | 2799 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 45,121 psi | 82% | 2825 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 37,608 psi | 68% | 2710 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 98% | 44,817 psi | 81% | 2907 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 37,231 psi | 68% | 2694 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 29,718 psi | 54% | 2536 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,315 psi | 60% | 2654 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,527 psi | 46% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,984 psi | 65% | 2648 fps | 97.5% |
| IMR 3031 | <<locked>> | 80% | 36,013 psi | 65% | 2700 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,098 psi | 60% | 2562 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 88% | 45,788 psi | 83% | 2789 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 46,485 psi | 84% | 2736 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 34,606 psi | 63% | 2690 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 33,707 psi | 61% | 2641 fps | 96.5% |
| IMR 8208 XBR | <<locked>> | 80% | 38,943 psi | 71% | 2697 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 80% | 43,337 psi | 79% | 2776 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 35,215 psi | 64% | 2661 fps | 99.3% |
| Lovex S060 | <<locked>> | 80% | 37,956 psi | 69% | 2625 fps | 97.5% |
| Lovex S062 | <<locked>> | 80% | 32,779 psi | 59% | 2572 fps | 97.4% |
| Lovex S065 | <<locked>> | 94% | 41,307 psi | 75% | 2753 fps | 95.6% |
| Lovex S070 | <<locked>> | 98% | 44,063 psi | 80% | 2828 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 36,318 psi | 66% | 2641 fps | 98.3% |
| Norma 202 | <<locked>> | 80% | 36,216 psi | 66% | 2654 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 32,372 psi | 59% | 2598 fps | 95.9% |
| Norma URP | <<locked>> | 94% | 36,506 psi | 66% | 2743 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 31,821 psi | 58% | 2598 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 38,943 psi | 71% | 2690 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,942 psi | 69% | 2713 fps | 97.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,206 psi | 77% | 2740 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,773 psi | 47% | 1627 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 43,685 psi | 79% | 2782 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 43,700 psi | 79% | 2799 fps | 95.4% |
| ReloadSwiss RS 52 | 43.3 gr | 80% | 33,910 psi | 62% | 2700 fps | 95.8% |
| ReloadSwiss RS 60 | 43.9 gr | 80% | 28,166 psi | 51% | 2556 fps | 96.8% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 35,897 psi | 65% | 2756 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 39,450 psi | 72% | 2822 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 39,987 psi | 73% | 2690 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 34,548 psi | 63% | 2589 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 80% | 27,818 psi | 50% | 2484 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 94% | 41,307 psi | 75% | 2753 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,215 psi | 64% | 2661 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 32,779 psi | 59% | 2572 fps | 97.4% |
| Shooters World SW4350 | <<locked>> | 98% | 44,063 psi | 80% | 2828 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 46,209 psi | 84% | 2795 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 31,154 psi | 57% | 2589 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,282 psi | 84% | 2785 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 36,637 psi | 66% | 2651 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,621 psi | 65% | 2651 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,956 psi | 69% | 2602 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,067 psi | 56% | 2467 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 46,253 psi | 84% | 2799 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 41,713 psi | 76% | 2776 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 37,478 psi | 68% | 2608 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 36,492 psi | 66% | 2657 fps | 97% |
| Somchem S355 | <<locked>> | 80% | 29,138 psi | 53% | 2500 fps | 95.2% |
| Somchem S365 | <<locked>> | 88% | 26,948 psi | 49% | 2520 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 43,076 psi | 78% | 2674 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,029 psi | 69% | 2602 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,199 psi | 60% | 2582 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,156 psi | 62% | 2585 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 27,485 psi | 50% | 2438 fps | 96.1% |
| Vihtavuori N160 | <<locked>> | 92% | 36,129 psi | 66% | 2687 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 38,667 psi | 70% | 2687 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 80% | 32,909 psi | 60% | 2575 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 92% | 35,099 psi | 64% | 2690 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 30,429 psi | 55% | 2510 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 37,521 psi | 68% | 2730 fps | 99.2% |
| Winchester 760 | <<locked>> | 98% | 44,817 psi | 81% | 2907 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,664 psi | 63% | 2651 fps | 97.3% |
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 92 powders for 7.5 x 55 Swiss loaded with the .308 | 153gr | TWENTY-NINE SILENTIO. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,048 fps; across all powders the maximum-charge window runs from 1,775 fps to 3,048 fps. Accurate 4350 gives the best case fill at 100 %, and 92 of the 92 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. The 153.0 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, Hodgdon H414 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 Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for 7.5 x 55 Swiss with the .308 | 153gr | 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.