Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 180gr | TWENTY-NINE ERTP bullet and 97 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% | 47,326 psi | 86% | 2520 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 48,327 psi | 88% | 2582 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 47,326 psi | 86% | 2579 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 49,719 psi | 90% | 2641 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 48,138 psi | 87% | 2562 fps | 95.8% |
| Accurate 4064 | <<locked>> | 92% | 47,108 psi | 85% | 2618 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 45,600 psi | 83% | 2680 fps | 99% |
| ADI AR 2206H | <<locked>> | 88% | 49,153 psi | 89% | 2654 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 47,050 psi | 85% | 2605 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 86% | 48,414 psi | 88% | 2608 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 47,935 psi | 87% | 2585 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 49,545 psi | 90% | 2700 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 47,950 psi | 87% | 2753 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 49,124 psi | 89% | 2667 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 46,818 psi | 85% | 2641 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,542 psi | 83% | 2687 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 98% | 49,240 psi | 89% | 2779 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 32,097 psi | 58% | 2438 fps | 97.3% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 48,515 psi | 88% | 2667 fps | 99.3% |
| Bofors RP3 | <<locked>> | 94% | 49,095 psi | 89% | 2680 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 47,166 psi | 86% | 2595 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 84% | 47,790 psi | 87% | 2552 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 46,876 psi | 85% | 2638 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 48,312 psi | 88% | 2723 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 82% | 48,965 psi | 89% | 2605 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 49,719 psi | 90% | 2631 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 47,355 psi | 86% | 2641 fps | 98.8% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 49,240 psi | 89% | 2730 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 88% | 49,530 psi | 90% | 2664 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,713 psi | 76% | 2572 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 47,688 psi | 87% | 2687 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 47,224 psi | 86% | 2703 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,824 psi | 63% | 1598 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 47,892 psi | 87% | 2621 fps | 99.9% |
| IMR 3031 | <<locked>> | 88% | 48,689 psi | 88% | 2644 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 49,530 psi | 90% | 2631 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 47,195 psi | 86% | 2562 fps | 96.6% |
| IMR 4350ᴾ | <<locked>> | 100% | 46,862 psi | 85% | 2615 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 96% | 49,211 psi | 89% | 2631 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 43,714 psi | 79% | 2628 fps | 98.8% |
| IMR 4895 | <<locked>> | 90% | 47,935 psi | 87% | 2671 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 48,414 psi | 88% | 2608 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 48,211 psi | 87% | 2592 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 47,979 psi | 87% | 2631 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 49,748 psi | 90% | 2589 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 48,994 psi | 89% | 2631 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 47,979 psi | 87% | 2621 fps | 98.1% |
| Lovex S070ᴾ | <<locked>> | 100% | 48,457 psi | 88% | 2651 fps | 97.3% |
| Norma 201 | <<locked>> | 88% | 48,080 psi | 87% | 2605 fps | 100% |
| Norma 202 | <<locked>> | 88% | 48,240 psi | 88% | 2605 fps | 100% |
| Norma 203B | <<locked>> | 92% | 49,124 psi | 89% | 2677 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 45,788 psi | 83% | 2677 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 92% | 48,979 psi | 89% | 2697 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 45,005 psi | 82% | 2664 fps | 97.3% |
| Ramshot TAC | <<locked>> | 86% | 48,646 psi | 88% | 2621 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 47,688 psi | 87% | 2641 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 49,617 psi | 90% | 2612 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,114 psi | 64% | 1634 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 48,095 psi | 87% | 2592 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 48,095 psi | 87% | 2621 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 49,269 psi | 89% | 2746 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 49,153 psi | 89% | 2779 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,194 psi | 82% | 2697 fps | 98.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 46,746 psi | 85% | 2726 fps | 98.5% |
| Rottweil R 901 | <<locked>> | 86% | 49,327 psi | 90% | 2585 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 48,399 psi | 88% | 2598 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 48,965 psi | 89% | 2671 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 47,166 psi | 86% | 2595 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 98% | 47,979 psi | 87% | 2621 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 88% | 47,979 psi | 87% | 2631 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 48,994 psi | 89% | 2631 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 48,457 psi | 88% | 2651 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 47,514 psi | 86% | 2684 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 49,850 psi | 90% | 2644 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 47,326 psi | 86% | 2625 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 47,050 psi | 85% | 2503 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 49,530 psi | 90% | 2543 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 47,906 psi | 87% | 2572 fps | 96.8% |
| Somchem S321 | <<locked>> | 84% | 49,139 psi | 89% | 2641 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 49,313 psi | 89% | 2549 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 49,559 psi | 90% | 2641 fps | 99.8% |
| Somchem S355 | <<locked>> | 96% | 49,792 psi | 90% | 2671 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,640 psi | 74% | 2628 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 47,094 psi | 85% | 2474 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 47,108 psi | 85% | 2493 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 47,398 psi | 86% | 2569 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 48,747 psi | 88% | 2585 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 47,935 psi | 87% | 2608 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,240 psi | 88% | 2671 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 86% | 48,820 psi | 89% | 2608 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 49,835 psi | 90% | 2628 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,108 psi | 85% | 2677 fps | 98.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 33,779 psi | 61% | 2507 fps | 97.2% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,400 psi | 90% | 2657 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 47,674 psi | 87% | 2648 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 49,530 psi | 90% | 2733 fps | 97.4% |
| Winchester StaBALL Match | <<locked>> | 88% | 47,007 psi | 85% | 2635 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% | 41,858 psi | 76% | 2438 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 45,208 psi | 82% | 2536 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,200 psi | 62% | 2369 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,495 psi | 73% | 2503 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 45,063 psi | 82% | 2513 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 32,372 psi | 59% | 2359 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 30,124 psi | 55% | 2375 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 38,247 psi | 69% | 2464 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 32,634 psi | 59% | 2326 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,263 psi | 73% | 2470 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 39,392 psi | 71% | 2464 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,543 psi | 84% | 2654 fps | 99.9% |
| Alliant Power Pro 2000-MR | 40.4 gr | 80% | 34,490 psi | 63% | 2480 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,633 psi | 57% | 2346 fps | 97.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,185 psi | 62% | 2402 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 31,865 psi | 58% | 2392 fps | 95.3% |
| Alliant Reloder-17 | 39.8 gr | 80% | 27,514 psi | 50% | 2306 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 96% | 28,660 psi | 52% | 2346 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,101 psi | 67% | 2464 fps | 97.3% |
| Bofors RP3 | <<locked>> | 80% | 30,879 psi | 56% | 2346 fps | 97.8% |
| Bofors RP7 | <<locked>> | 94% | 44,440 psi | 81% | 2549 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,250 psi | 77% | 2461 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,363 psi | 70% | 2493 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,959 psi | 76% | 2612 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 80% | 45,977 psi | 83% | 2559 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,543 psi | 84% | 2585 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 34,229 psi | 62% | 2395 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 94% | 40,640 psi | 74% | 2575 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 38,508 psi | 70% | 2474 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 27,209 psi | 49% | 2247 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,447 psi | 63% | 2444 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 96% | 43,874 psi | 80% | 2644 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,875 psi | 47% | 1427 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,144 psi | 67% | 2431 fps | 98.7% |
| IMR 3031 | <<locked>> | 80% | 37,362 psi | 68% | 2467 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,200 psi | 62% | 2356 fps | 97.1% |
| IMR 4166 Enduron | <<locked>> | 84% | 41,742 psi | 76% | 2467 fps | 95.2% |
| IMR 4350 | <<locked>> | 98% | 44,193 psi | 80% | 2572 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 41,060 psi | 75% | 2490 fps | 95% |
| IMR 4831 | <<locked>> | 90% | 31,778 psi | 58% | 2392 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 34,940 psi | 63% | 2431 fps | 98% |
| IMR 8208 XBR | <<locked>> | 80% | 40,263 psi | 73% | 2470 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 45,092 psi | 82% | 2546 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 36,695 psi | 67% | 2444 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 39,073 psi | 71% | 2408 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 33,939 psi | 62% | 2362 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 35,534 psi | 64% | 2395 fps | 95.1% |
| Lovex S070 | <<locked>> | 94% | 40,045 psi | 73% | 2507 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 37,594 psi | 68% | 2421 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 37,579 psi | 68% | 2431 fps | 100% |
| Norma 203B | <<locked>> | 80% | 33,562 psi | 61% | 2392 fps | 97.5% |
| Norma URP | <<locked>> | 88% | 31,299 psi | 57% | 2382 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 33,040 psi | 60% | 2398 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 94% | 37,376 psi | 68% | 2516 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 40,190 psi | 73% | 2474 fps | 96.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,160 psi | 71% | 2493 fps | 98.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,656 psi | 79% | 2516 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,962 psi | 47% | 1457 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,020 psi | 82% | 2543 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 39,798 psi | 72% | 2477 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 35,085 psi | 64% | 2487 fps | 97.4% |
| ReloadSwiss RS 60 | 39.8 gr | 80% | 29,283 psi | 53% | 2372 fps | 98.6% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 32,619 psi | 59% | 2444 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 35,737 psi | 65% | 2503 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 41,292 psi | 75% | 2461 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 35,636 psi | 65% | 2375 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 29,095 psi | 53% | 2293 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 94% | 44,440 psi | 81% | 2549 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 35,534 psi | 64% | 2395 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,695 psi | 67% | 2444 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 33,939 psi | 62% | 2362 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 94% | 40,045 psi | 73% | 2507 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 30,255 psi | 55% | 2336 fps | 96.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,116 psi | 69% | 2444 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,680 psi | 67% | 2431 fps | 98.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,117 psi | 71% | 2375 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,097 psi | 58% | 2257 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 41,843 psi | 76% | 2477 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 43,091 psi | 78% | 2546 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 38,740 psi | 70% | 2385 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 37,782 psi | 69% | 2444 fps | 98.4% |
| Somchem S355 | <<locked>> | 80% | 30,298 psi | 55% | 2303 fps | 97% |
| Somchem S365 | <<locked>> | 84% | 24,801 psi | 45% | 2238 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 44,338 psi | 80% | 2434 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,218 psi | 71% | 2372 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,505 psi | 63% | 2362 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,505 psi | 64% | 2372 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 28,645 psi | 52% | 2247 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 88% | 32,953 psi | 60% | 2382 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 40,089 psi | 73% | 2467 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 34,026 psi | 62% | 2362 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 32,082 psi | 58% | 2388 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 96% | 29,979 psi | 54% | 2411 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 27,557 psi | 50% | 2218 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 39,088 psi | 71% | 2507 fps | 99.9% |
| Winchester 760 | <<locked>> | 94% | 40,640 psi | 74% | 2575 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,984 psi | 65% | 2438 fps | 98.6% |
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 97 powders for 7.5 x 55 Swiss loaded with the .308 | 180gr | TWENTY-NINE ERTP. Alliant Reloder-17 delivers the highest muzzle velocity at 2,779 fps; across all powders the maximum-charge window runs from 1,598 fps to 2,779 fps. Accurate 4350 gives the best case fill at 100 %, and 97 of the 97 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 180.0 gr projectile in 0.308" calls for a 1:9.5 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 | 180gr | TWENTY-NINE ERTP 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.