Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 165gr | Frontier BTSP 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% | 49,719 psi | 90% | 2700 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 47,776 psi | 87% | 2720 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 46,818 psi | 85% | 2720 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 48,936 psi | 89% | 2779 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 49,835 psi | 90% | 2805 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 44,933 psi | 82% | 2812 fps | 98.6% |
| ADI AR 2206H | <<locked>> | 88% | 48,718 psi | 88% | 2795 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 94% | 49,516 psi | 90% | 2789 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 86% | 48,167 psi | 87% | 2749 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 86% | 47,558 psi | 86% | 2730 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 49,269 psi | 89% | 2851 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 47,732 psi | 87% | 2897 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 48,544 psi | 88% | 2808 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 49,632 psi | 90% | 2707 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 49,472 psi | 90% | 2831 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,194 psi | 82% | 2822 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 98% | 48,936 psi | 89% | 2920 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 31,836 psi | 58% | 2556 fps | 96.5% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 48,066 psi | 87% | 2805 fps | 99% |
| Bofors RP3 | <<locked>> | 94% | 48,559 psi | 88% | 2822 fps | 99.9% |
| Bofors RP7 | <<locked>> | 98% | 49,806 psi | 90% | 2779 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 47,326 psi | 86% | 2690 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 49,734 psi | 90% | 2828 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 47,805 psi | 87% | 2861 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 82% | 48,443 psi | 88% | 2746 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 49,327 psi | 90% | 2772 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 47,021 psi | 85% | 2779 fps | 98.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 48,994 psi | 89% | 2867 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 88% | 49,124 psi | 89% | 2805 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,408 psi | 75% | 2703 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 47,326 psi | 86% | 2831 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,621 psi | 63% | 1696 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 47,181 psi | 86% | 2756 fps | 99.7% |
| IMR 3031 | <<locked>> | 88% | 48,124 psi | 87% | 2789 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 48,965 psi | 89% | 2769 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 90% | 49,719 psi | 90% | 2746 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 96% | 48,791 psi | 89% | 2766 fps | 96.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 43,178 psi | 78% | 2759 fps | 98.3% |
| IMR 4895 | <<locked>> | 90% | 47,601 psi | 86% | 2812 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 86% | 48,167 psi | 87% | 2749 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 82% | 47,747 psi | 87% | 2733 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 47,195 psi | 86% | 2766 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 49,255 psi | 89% | 2726 fps | 99.6% |
| Lovex S062 | <<locked>> | 92% | 48,443 psi | 88% | 2769 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 47,747 psi | 87% | 2762 fps | 97.7% |
| Lovex S070ᴾ | <<locked>> | 100% | 47,993 psi | 87% | 2785 fps | 96.7% |
| Norma 201 | <<locked>> | 88% | 47,558 psi | 86% | 2740 fps | 99.9% |
| Norma 202 | <<locked>> | 88% | 47,935 psi | 87% | 2749 fps | 100% |
| Norma 203B | <<locked>> | 92% | 48,646 psi | 88% | 2818 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 45,281 psi | 82% | 2812 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 92% | 48,573 psi | 88% | 2838 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 44,802 psi | 81% | 2799 fps | 96.7% |
| Ramshot TAC | <<locked>> | 86% | 48,399 psi | 88% | 2759 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 86% | 47,500 psi | 86% | 2782 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 84% | 49,037 psi | 89% | 2746 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,853 psi | 63% | 1736 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 47,790 psi | 87% | 2733 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 47,877 psi | 87% | 2759 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 48,921 psi | 89% | 2890 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 48,805 psi | 89% | 2927 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,078 psi | 82% | 2838 fps | 98.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 46,209 psi | 84% | 2858 fps | 97.9% |
| Rottweil R 901 | <<locked>> | 86% | 48,849 psi | 89% | 2726 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 48,109 psi | 87% | 2740 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 48,428 psi | 88% | 2808 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 49,806 psi | 90% | 2779 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 47,747 psi | 87% | 2762 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 88% | 47,195 psi | 86% | 2766 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 48,443 psi | 88% | 2769 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 47,993 psi | 87% | 2785 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 47,195 psi | 86% | 2825 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 49,443 psi | 90% | 2782 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 46,978 psi | 85% | 2762 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 49,777 psi | 90% | 2687 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 49,023 psi | 89% | 2680 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 47,427 psi | 86% | 2703 fps | 96.2% |
| Somchem S321 | <<locked>> | 84% | 48,776 psi | 89% | 2782 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 48,733 psi | 88% | 2687 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 49,095 psi | 89% | 2779 fps | 99.6% |
| Somchem S355 | <<locked>> | 96% | 49,400 psi | 90% | 2812 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,379 psi | 73% | 2762 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 84% | 49,806 psi | 90% | 2657 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 49,748 psi | 90% | 2674 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 46,862 psi | 85% | 2707 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 48,225 psi | 88% | 2723 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 47,442 psi | 86% | 2743 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,616 psi | 86% | 2802 fps | 98.7% |
| Vihtavuori N530 | <<locked>> | 86% | 48,486 psi | 88% | 2749 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 49,501 psi | 90% | 2769 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,630 psi | 85% | 2812 fps | 98.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 33,605 psi | 61% | 2635 fps | 96.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,095 psi | 89% | 2792 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 47,297 psi | 86% | 2792 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 48,994 psi | 89% | 2867 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 90% | 49,777 psi | 90% | 2822 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% | 41,292 psi | 75% | 2572 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 44,860 psi | 81% | 2674 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,823 psi | 61% | 2493 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 39,856 psi | 72% | 2631 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 31,981 psi | 58% | 2484 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 31,836 psi | 58% | 2546 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 37,971 psi | 69% | 2592 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 80% | 32,372 psi | 59% | 2448 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,972 psi | 73% | 2605 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 38,696 psi | 70% | 2595 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,180 psi | 84% | 2799 fps | 99.7% |
| Alliant Power Pro 2000-MR | 43 gr | 80% | 34,113 psi | 62% | 2602 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,241 psi | 57% | 2464 fps | 97.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,789 psi | 85% | 2667 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 33,910 psi | 62% | 2526 fps | 96.5% |
| Alliant Reloder-16 | <<locked>> | 90% | 33,489 psi | 61% | 2562 fps | 95.3% |
| Alliant Reloder-17 | 43.4 gr | 82% | 29,008 psi | 53% | 2474 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 30,139 psi | 55% | 2510 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,651 psi | 67% | 2585 fps | 96.7% |
| Bofors RP3 | <<locked>> | 80% | 30,530 psi | 55% | 2464 fps | 97.1% |
| Bofors RP7 | <<locked>> | 96% | 46,818 psi | 85% | 2730 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,858 psi | 76% | 2595 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,927 psi | 69% | 2621 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,568 psi | 75% | 2749 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 80% | 45,382 psi | 82% | 2697 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,050 psi | 84% | 2723 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 33,953 psi | 62% | 2516 fps | 95% |
| Hodgdon H414 | <<locked>> | 96% | 42,946 psi | 78% | 2759 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 38,203 psi | 69% | 2605 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 28,572 psi | 52% | 2405 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,185 psi | 62% | 2569 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,715 psi | 47% | 1516 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,680 psi | 67% | 2556 fps | 98.2% |
| IMR 3031 | <<locked>> | 80% | 36,999 psi | 67% | 2602 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,910 psi | 62% | 2477 fps | 96.5% |
| IMR 4166 Enduron | <<locked>> | 86% | 44,019 psi | 80% | 2644 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 92% | 43,439 psi | 79% | 2671 fps | 95% |
| IMR 4831 | <<locked>> | 92% | 33,388 psi | 61% | 2556 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 34,650 psi | 63% | 2556 fps | 97.4% |
| IMR 8208 XBR | <<locked>> | 80% | 39,972 psi | 73% | 2605 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 44,599 psi | 81% | 2680 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 36,172 psi | 66% | 2572 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 38,754 psi | 70% | 2536 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 33,605 psi | 61% | 2487 fps | 98.2% |
| Lovex S065 | <<locked>> | 90% | 37,318 psi | 68% | 2562 fps | 95.1% |
| Lovex S070 | <<locked>> | 96% | 42,337 psi | 77% | 2687 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 37,202 psi | 68% | 2549 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 37,188 psi | 67% | 2562 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 33,286 psi | 60% | 2516 fps | 96.9% |
| Norma URP | <<locked>> | 90% | 33,040 psi | 60% | 2552 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 32,706 psi | 59% | 2520 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 96% | 39,421 psi | 72% | 2694 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 39,726 psi | 72% | 2598 fps | 96% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,754 psi | 70% | 2621 fps | 98.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,250 psi | 78% | 2648 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,020 psi | 47% | 1555 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,628 psi | 81% | 2680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 42,090 psi | 76% | 2657 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 34,809 psi | 63% | 2615 fps | 96.8% |
| ReloadSwiss RS 60 | 42.3 gr | 80% | 28,877 psi | 52% | 2480 fps | 97.9% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 34,374 psi | 62% | 2615 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 37,884 psi | 69% | 2680 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 40,828 psi | 74% | 2592 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 35,360 psi | 64% | 2500 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 28,718 psi | 52% | 2408 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 96% | 46,818 psi | 85% | 2730 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 37,318 psi | 68% | 2562 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,172 psi | 66% | 2572 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 33,605 psi | 61% | 2487 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 96% | 42,337 psi | 77% | 2687 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 30,095 psi | 55% | 2457 fps | 95.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 37,695 psi | 68% | 2569 fps | 96% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,477 psi | 66% | 2562 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,928 psi | 71% | 2510 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,937 psi | 58% | 2382 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 44,367 psi | 81% | 2654 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 42,612 psi | 77% | 2677 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 38,363 psi | 70% | 2513 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 37,275 psi | 68% | 2569 fps | 97.8% |
| Somchem S355 | <<locked>> | 80% | 29,936 psi | 54% | 2421 fps | 96.2% |
| Somchem S365 | <<locked>> | 86% | 25,962 psi | 47% | 2392 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 44,150 psi | 80% | 2575 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,030 psi | 71% | 2507 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,272 psi | 62% | 2490 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,099 psi | 64% | 2497 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 28,268 psi | 51% | 2359 fps | 97.1% |
| Vihtavuori N160 | <<locked>> | 90% | 34,722 psi | 63% | 2552 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 39,769 psi | 72% | 2595 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 33,663 psi | 61% | 2487 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 33,881 psi | 61% | 2559 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 98% | 31,604 psi | 57% | 2582 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 29,167 psi | 53% | 2382 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 38,537 psi | 70% | 2638 fps | 99.6% |
| Winchester 760 | <<locked>> | 96% | 42,946 psi | 78% | 2759 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,389 psi | 64% | 2559 fps | 98% |
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 95 powders for 7.5 x 55 Swiss loaded with the .308 | 165gr | Frontier BTSP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,927 fps; across all powders the maximum-charge window runs from 1,696 fps to 2,927 fps. Accurate 4350 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:10.5 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. 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 | 165gr | Frontier BTSP 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.