Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 155gr | Sierra Tipped MatchKing bullet and 95 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>> | 86% | 49,617 psi | 90% | 2808 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 47,703 psi | 87% | 2825 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 46,543 psi | 84% | 2822 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 48,849 psi | 89% | 2887 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 49,588 psi | 90% | 2910 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 44,773 psi | 81% | 2913 fps | 98.3% |
| ADI AR 2206H | <<locked>> | 88% | 48,515 psi | 88% | 2897 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 94% | 49,400 psi | 90% | 2890 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 86% | 47,819 psi | 87% | 2851 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 86% | 47,326 psi | 86% | 2838 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 48,820 psi | 89% | 2953 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 47,558 psi | 86% | 2999 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 48,617 psi | 88% | 2917 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 82% | 49,501 psi | 90% | 2815 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 49,255 psi | 89% | 2933 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,237 psi | 82% | 2927 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 48,631 psi | 88% | 3022 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 31,850 psi | 58% | 2648 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 47,688 psi | 87% | 2904 fps | 98.7% |
| Bofors RP3 | <<locked>> | 94% | 48,472 psi | 88% | 2927 fps | 99.9% |
| Bofors RP7 | <<locked>> | 98% | 49,705 psi | 90% | 2881 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 47,137 psi | 86% | 2792 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 88% | 49,414 psi | 90% | 2930 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 47,601 psi | 86% | 2969 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 82% | 48,312 psi | 88% | 2854 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 49,124 psi | 89% | 2877 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 46,934 psi | 85% | 2881 fps | 98% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 48,646 psi | 88% | 2966 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 88% | 48,878 psi | 89% | 2907 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,176 psi | 75% | 2802 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 47,268 psi | 86% | 2936 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,548 psi | 63% | 1772 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 47,297 psi | 86% | 2864 fps | 99.6% |
| IMR 3031 | <<locked>> | 88% | 47,805 psi | 87% | 2894 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 48,921 psi | 89% | 2874 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 90% | 49,588 psi | 90% | 2848 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 96% | 48,718 psi | 88% | 2867 fps | 96% |
| IMR 4831ᴾ | <<locked>> | 100% | 43,018 psi | 78% | 2858 fps | 98% |
| IMR 4895 | <<locked>> | 90% | 47,558 psi | 86% | 2917 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 86% | 47,819 psi | 87% | 2851 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 82% | 47,500 psi | 86% | 2835 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 47,123 psi | 86% | 2871 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 48,921 psi | 89% | 2825 fps | 99.4% |
| Lovex S062 | <<locked>> | 92% | 48,399 psi | 88% | 2874 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 47,587 psi | 86% | 2861 fps | 97.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 47,921 psi | 87% | 2887 fps | 96.3% |
| Norma 201 | <<locked>> | 88% | 47,485 psi | 86% | 2844 fps | 99.9% |
| Norma 202 | <<locked>> | 88% | 47,500 psi | 86% | 2851 fps | 100% |
| Norma 203B | <<locked>> | 92% | 48,428 psi | 88% | 2920 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 45,237 psi | 82% | 2913 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 92% | 48,515 psi | 88% | 2943 fps | 99.4% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 44,730 psi | 81% | 2900 fps | 96.3% |
| Ramshot TAC | <<locked>> | 86% | 48,211 psi | 87% | 2861 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 47,326 psi | 86% | 2884 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 84% | 49,037 psi | 89% | 2851 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,998 psi | 64% | 1818 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 47,587 psi | 86% | 2838 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 47,732 psi | 87% | 2861 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 48,646 psi | 88% | 2995 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 48,631 psi | 88% | 3031 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 44,947 psi | 82% | 2936 fps | 98% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 46,224 psi | 84% | 2956 fps | 97.5% |
| Rottweil R 901 | <<locked>> | 86% | 48,762 psi | 88% | 2835 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 47,964 psi | 87% | 2844 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 48,356 psi | 88% | 2913 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 98% | 49,705 psi | 90% | 2881 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 98% | 47,587 psi | 86% | 2861 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 47,123 psi | 86% | 2871 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 48,399 psi | 88% | 2874 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 47,921 psi | 87% | 2887 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 46,949 psi | 85% | 2923 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 49,356 psi | 90% | 2887 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 46,862 psi | 85% | 2864 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 49,574 psi | 90% | 2792 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 49,037 psi | 89% | 2789 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 47,442 psi | 86% | 2805 fps | 95.9% |
| Somchem S321 | <<locked>> | 84% | 48,733 psi | 88% | 2887 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 48,675 psi | 88% | 2792 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 48,718 psi | 88% | 2877 fps | 99.4% |
| Somchem S355 | <<locked>> | 96% | 49,052 psi | 89% | 2913 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,292 psi | 73% | 2861 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 84% | 49,559 psi | 90% | 2762 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 49,545 psi | 90% | 2779 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 49,835 psi | 90% | 2858 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 47,921 psi | 87% | 2828 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 47,369 psi | 86% | 2848 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,471 psi | 86% | 2904 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 86% | 48,051 psi | 87% | 2848 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 49,501 psi | 90% | 2877 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,630 psi | 85% | 2917 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 33,373 psi | 61% | 2720 fps | 96% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,008 psi | 89% | 2894 fps | 99.8% |
| Winchester 748 | <<locked>> | 86% | 47,195 psi | 86% | 2897 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 48,979 psi | 89% | 2972 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 90% | 49,371 psi | 90% | 2923 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% | 40,973 psi | 74% | 2667 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 44,585 psi | 81% | 2776 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,663 psi | 61% | 2589 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 39,856 psi | 72% | 2733 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 31,836 psi | 58% | 2575 fps | 99.5% |
| Accurate 4350 | <<locked>> | 92% | 33,895 psi | 62% | 2690 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 37,768 psi | 69% | 2687 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 80% | 32,082 psi | 58% | 2533 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,740 psi | 72% | 2700 fps | 99% |
| Alliant AR-Comp | <<locked>> | 80% | 38,551 psi | 70% | 2697 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 45,876 psi | 83% | 2900 fps | 99.5% |
| Alliant Power Pro 2000-MR | 45 gr | 80% | 33,895 psi | 62% | 2690 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,096 psi | 56% | 2556 fps | 96.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,572 psi | 85% | 2769 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 33,678 psi | 61% | 2615 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 92% | 35,360 psi | 64% | 2703 fps | 95.6% |
| Alliant Reloder-17 | 46.6 gr | 84% | 30,835 psi | 56% | 2618 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 98% | 30,081 psi | 55% | 2595 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,564 psi | 66% | 2680 fps | 96.2% |
| Bofors RP3 | <<locked>> | 80% | 30,284 psi | 55% | 2549 fps | 96.7% |
| Bofors RP7 | <<locked>> | 96% | 46,775 psi | 85% | 2828 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,727 psi | 76% | 2694 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,637 psi | 68% | 2717 fps | 99.2% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,394 psi | 75% | 2848 fps | 98.1% |
| Hodgdon H322 | <<locked>> | 80% | 45,121 psi | 82% | 2802 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,021 psi | 84% | 2828 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 36,129 psi | 66% | 2664 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 98% | 45,556 psi | 83% | 2910 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 38,000 psi | 69% | 2700 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 30,298 psi | 55% | 2543 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,997 psi | 62% | 2664 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,556 psi | 46% | 1581 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,492 psi | 66% | 2648 fps | 97.8% |
| IMR 3031 | <<locked>> | 80% | 36,898 psi | 67% | 2703 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,591 psi | 61% | 2562 fps | 95.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 46,775 psi | 85% | 2795 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 94% | 45,977 psi | 83% | 2818 fps | 95.3% |
| IMR 4831 | <<locked>> | 92% | 33,257 psi | 60% | 2648 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 34,447 psi | 63% | 2648 fps | 96.9% |
| IMR 8208 XBR | <<locked>> | 80% | 39,740 psi | 72% | 2700 fps | 99% |
| Lovex D073.5 | <<locked>> | 80% | 44,469 psi | 81% | 2782 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 36,042 psi | 65% | 2667 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 38,421 psi | 70% | 2625 fps | 97.8% |
| Lovex S062 | <<locked>> | 80% | 33,286 psi | 60% | 2572 fps | 97.8% |
| Lovex S065 | <<locked>> | 92% | 39,624 psi | 72% | 2710 fps | 95.4% |
| Lovex S070 | <<locked>> | 98% | 44,846 psi | 81% | 2831 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 37,101 psi | 67% | 2644 fps | 98.7% |
| Norma 202 | <<locked>> | 80% | 36,985 psi | 67% | 2657 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 33,083 psi | 60% | 2605 fps | 96.4% |
| Norma URP | <<locked>> | 92% | 35,085 psi | 64% | 2697 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 32,489 psi | 59% | 2605 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 98% | 41,930 psi | 76% | 2844 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 39,610 psi | 72% | 2694 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,667 psi | 70% | 2720 fps | 97.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,989 psi | 78% | 2743 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,802 psi | 47% | 1621 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,527 psi | 81% | 2785 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 41,930 psi | 76% | 2753 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 34,679 psi | 63% | 2707 fps | 96.3% |
| ReloadSwiss RS 60 | 44.3 gr | 80% | 28,732 psi | 52% | 2566 fps | 97.4% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 36,767 psi | 67% | 2766 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 40,306 psi | 73% | 2835 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 40,785 psi | 74% | 2694 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 35,288 psi | 64% | 2595 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 80% | 28,543 psi | 52% | 2493 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 96% | 46,775 psi | 85% | 2828 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 92% | 39,624 psi | 72% | 2710 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,042 psi | 65% | 2667 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 33,286 psi | 60% | 2572 fps | 97.8% |
| Shooters World SW4350 | <<locked>> | 98% | 44,846 psi | 81% | 2831 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 31,763 psi | 58% | 2595 fps | 95.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 37,594 psi | 68% | 2661 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,347 psi | 66% | 2654 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,682 psi | 70% | 2605 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,749 psi | 58% | 2470 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 44,208 psi | 80% | 2749 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 42,511 psi | 77% | 2779 fps | 99.6% |
| Somchem S335 | <<locked>> | 80% | 38,232 psi | 69% | 2612 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 37,202 psi | 68% | 2664 fps | 97.5% |
| Somchem S355 | <<locked>> | 80% | 29,791 psi | 54% | 2507 fps | 95.7% |
| Somchem S365 | <<locked>> | 86% | 25,904 psi | 47% | 2477 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 43,903 psi | 80% | 2677 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,812 psi | 70% | 2605 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,055 psi | 62% | 2585 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,925 psi | 63% | 2589 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 28,123 psi | 51% | 2444 fps | 96.6% |
| Vihtavuori N160 | <<locked>> | 90% | 34,650 psi | 63% | 2644 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 39,465 psi | 72% | 2690 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 80% | 33,620 psi | 61% | 2582 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 92% | 35,984 psi | 65% | 2703 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 98% | 31,459 psi | 57% | 2667 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 29,095 psi | 53% | 2464 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 38,551 psi | 70% | 2740 fps | 99.5% |
| Winchester 760 | <<locked>> | 98% | 45,788 psi | 83% | 2913 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,389 psi | 64% | 2654 fps | 97.7% |
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 104 powders for 7.5 x 55 Swiss loaded with the .308 | 155gr | Sierra Tipped MatchKing. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,031 fps; across all powders the maximum-charge window runs from 1,772 fps to 3,031 fps. Accurate 3100 gives the best case fill at 100 %, and 104 of the 104 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 155.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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 | 155gr | Sierra Tipped MatchKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 3100, Alliant Reloder-26 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.