Load Specifications
Load data in caliber 7.5 x 55 Swiss with .308 | 186gr | Peregrine Glider GRM bullet and 99 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% | 47,195 psi | 86% | 2484 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 48,269 psi | 88% | 2546 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 46,905 psi | 85% | 2539 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 49,748 psi | 90% | 2608 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 48,240 psi | 88% | 2536 fps | 96.3% |
| Accurate 4064 | <<locked>> | 92% | 46,891 psi | 85% | 2582 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 45,818 psi | 83% | 2648 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 88% | 49,269 psi | 89% | 2621 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 47,210 psi | 86% | 2572 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 86% | 48,530 psi | 88% | 2575 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 48,182 psi | 87% | 2549 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 49,719 psi | 90% | 2667 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 48,211 psi | 87% | 2723 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 49,298 psi | 89% | 2635 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 46,920 psi | 85% | 2608 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,759 psi | 83% | 2657 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 49,487 psi | 90% | 2746 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 31,923 psi | 58% | 2411 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 34,969 psi | 63% | 2539 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 48,762 psi | 88% | 2635 fps | 99.5% |
| Bofors RP3 | <<locked>> | 94% | 49,168 psi | 89% | 2648 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 47,239 psi | 86% | 2566 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 47,906 psi | 87% | 2520 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 47,007 psi | 85% | 2605 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 48,631 psi | 88% | 2690 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 49,139 psi | 89% | 2569 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 47,442 psi | 86% | 2608 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 49,516 psi | 90% | 2700 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 96% | 48,124 psi | 87% | 2618 fps | 96% |
| Hodgdon H4895 | <<locked>> | 88% | 49,676 psi | 90% | 2631 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,814 psi | 76% | 2543 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 47,979 psi | 87% | 2657 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 47,442 psi | 86% | 2680 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,708 psi | 63% | 1572 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 47,790 psi | 87% | 2585 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 48,921 psi | 89% | 2608 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 49,705 psi | 90% | 2598 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 47,340 psi | 86% | 2533 fps | 97% |
| IMR 4350ᴾ | <<locked>> | 100% | 47,094 psi | 85% | 2589 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 96% | 49,443 psi | 90% | 2602 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 43,903 psi | 80% | 2598 fps | 99.1% |
| IMR 4895 | <<locked>> | 90% | 48,080 psi | 87% | 2638 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 48,530 psi | 88% | 2575 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 48,138 psi | 87% | 2559 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 48,022 psi | 87% | 2595 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 49,864 psi | 90% | 2556 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 49,023 psi | 89% | 2595 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 48,037 psi | 87% | 2592 fps | 98.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 48,602 psi | 88% | 2625 fps | 97.7% |
| Norma 201 | <<locked>> | 88% | 48,037 psi | 87% | 2569 fps | 100% |
| Norma 202 | <<locked>> | 88% | 48,356 psi | 88% | 2572 fps | 100% |
| Norma 203B | <<locked>> | 92% | 49,327 psi | 90% | 2644 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 46,035 psi | 84% | 2644 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 92% | 49,298 psi | 89% | 2667 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 45,237 psi | 82% | 2638 fps | 97.8% |
| Ramshot TAC | <<locked>> | 86% | 48,776 psi | 89% | 2592 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 86% | 47,877 psi | 87% | 2608 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 49,748 psi | 90% | 2579 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,969 psi | 63% | 1608 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 48,240 psi | 88% | 2559 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 48,182 psi | 87% | 2592 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 49,647 psi | 90% | 2713 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 49,472 psi | 90% | 2749 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,469 psi | 83% | 2667 fps | 99.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 46,963 psi | 85% | 2697 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 86% | 48,994 psi | 89% | 2549 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 48,341 psi | 88% | 2566 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 49,037 psi | 89% | 2638 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 47,239 psi | 86% | 2566 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 98% | 48,037 psi | 87% | 2592 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 88% | 48,022 psi | 87% | 2595 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 49,023 psi | 89% | 2595 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 48,602 psi | 88% | 2625 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 47,805 psi | 87% | 2654 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 46,615 psi | 85% | 2562 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 47,514 psi | 86% | 2592 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 47,094 psi | 85% | 2470 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 49,734 psi | 90% | 2510 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 48,124 psi | 87% | 2546 fps | 97.3% |
| Somchem S321 | <<locked>> | 84% | 49,269 psi | 89% | 2605 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 49,284 psi | 89% | 2513 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 49,777 psi | 90% | 2608 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 46,963 psi | 85% | 2595 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,683 psi | 74% | 2595 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 47,123 psi | 86% | 2441 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 47,210 psi | 86% | 2457 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 47,500 psi | 86% | 2533 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 48,921 psi | 89% | 2552 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 48,109 psi | 87% | 2572 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,559 psi | 88% | 2641 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 86% | 48,979 psi | 89% | 2575 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 47,137 psi | 86% | 2556 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,384 psi | 86% | 2648 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 33,620 psi | 61% | 2477 fps | 97.6% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,690 psi | 90% | 2628 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 47,892 psi | 87% | 2615 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 46,630 psi | 85% | 2654 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 28,340 psi | 51% | 2385 fps | 96.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 47,166 psi | 86% | 2602 fps | 100% |
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% | 41,321 psi | 75% | 2398 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 45,049 psi | 82% | 2500 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,591 psi | 61% | 2326 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,393 psi | 73% | 2467 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 45,121 psi | 82% | 2484 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 31,836 psi | 58% | 2323 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 29,863 psi | 54% | 2343 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 38,145 psi | 69% | 2431 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 32,532 psi | 59% | 2297 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,248 psi | 73% | 2438 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 39,436 psi | 72% | 2428 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,673 psi | 85% | 2621 fps | 100% |
| Alliant Power Pro 2000-MR | 40.4 gr | 80% | 34,389 psi | 62% | 2451 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,473 psi | 57% | 2313 fps | 98.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 33,997 psi | 62% | 2369 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 29,878 psi | 54% | 2316 fps | 95% |
| Alliant Reloder-17 | 39.7 gr | 80% | 27,079 psi | 49% | 2270 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 26,789 psi | 49% | 2267 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 32,663 psi | 59% | 2480 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,072 psi | 67% | 2431 fps | 97.7% |
| Bofors RP3 | <<locked>> | 80% | 30,516 psi | 55% | 2310 fps | 98.1% |
| Bofors RP7 | <<locked>> | 92% | 41,843 psi | 76% | 2474 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,235 psi | 77% | 2428 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,305 psi | 70% | 2461 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,047 psi | 76% | 2582 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 80% | 46,166 psi | 84% | 2526 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 31,734 psi | 58% | 2313 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 92% | 38,043 psi | 69% | 2497 fps | 95% |
| Hodgdon H4350 | <<locked>> | 94% | 45,005 psi | 82% | 2566 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 38,406 psi | 70% | 2441 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 26,919 psi | 49% | 2218 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,360 psi | 62% | 2411 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 94% | 41,162 psi | 75% | 2566 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,715 psi | 47% | 1404 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,130 psi | 67% | 2398 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 37,362 psi | 68% | 2434 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,069 psi | 62% | 2323 fps | 97.5% |
| IMR 4166 Enduron | <<locked>> | 82% | 39,073 psi | 71% | 2388 fps | 95% |
| IMR 4350 | <<locked>> | 96% | 41,524 psi | 75% | 2493 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 41,089 psi | 75% | 2461 fps | 95.5% |
| IMR 4831 | <<locked>> | 88% | 29,472 psi | 53% | 2306 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 34,809 psi | 63% | 2398 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 40,248 psi | 73% | 2438 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 44,962 psi | 82% | 2510 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 36,216 psi | 66% | 2405 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 39,044 psi | 71% | 2375 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 33,692 psi | 61% | 2329 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 35,317 psi | 64% | 2362 fps | 95.5% |
| Lovex S070 | <<locked>> | 92% | 37,608 psi | 68% | 2431 fps | 95% |
| Norma 201 | <<locked>> | 80% | 37,304 psi | 68% | 2388 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 37,478 psi | 68% | 2398 fps | 100% |
| Norma 203B | <<locked>> | 80% | 33,402 psi | 61% | 2359 fps | 97.9% |
| Norma URP | <<locked>> | 88% | 31,125 psi | 56% | 2352 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 32,938 psi | 60% | 2369 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 94% | 37,347 psi | 68% | 2490 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 40,132 psi | 73% | 2444 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,160 psi | 71% | 2461 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,410 psi | 79% | 2480 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,773 psi | 47% | 1434 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,092 psi | 82% | 2510 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 37,173 psi | 67% | 2398 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 34,998 psi | 64% | 2454 fps | 97.8% |
| ReloadSwiss RS 60 | 39.7 gr | 80% | 28,877 psi | 52% | 2336 fps | 98.9% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 30,342 psi | 55% | 2362 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 33,431 psi | 61% | 2421 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 40,843 psi | 74% | 2421 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 35,302 psi | 64% | 2339 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 28,761 psi | 52% | 2260 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 92% | 41,843 psi | 76% | 2474 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 35,317 psi | 64% | 2362 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,216 psi | 66% | 2405 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 33,692 psi | 61% | 2329 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 37,608 psi | 68% | 2431 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 30,037 psi | 55% | 2306 fps | 96.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,000 psi | 69% | 2411 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,593 psi | 66% | 2402 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,972 psi | 71% | 2343 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,923 psi | 58% | 2224 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 39,291 psi | 71% | 2405 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 43,091 psi | 78% | 2513 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 38,537 psi | 70% | 2349 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 37,739 psi | 68% | 2415 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 29,965 psi | 54% | 2270 fps | 97.3% |
| Somchem S365 | <<locked>> | 82% | 22,843 psi | 41% | 2152 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 44,295 psi | 80% | 2402 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,175 psi | 71% | 2339 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,330 psi | 62% | 2326 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,375 psi | 64% | 2339 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 28,369 psi | 51% | 2215 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 30,632 psi | 56% | 2303 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 40,059 psi | 73% | 2434 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 33,852 psi | 61% | 2329 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 31,908 psi | 58% | 2359 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 94% | 27,949 psi | 51% | 2336 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 25,628 psi | 47% | 2142 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 39,160 psi | 71% | 2477 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 38,319 psi | 70% | 2500 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 98% | 26,571 psi | 48% | 2323 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,926 psi | 65% | 2408 fps | 98.9% |
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 111 powders for 7.5 x 55 Swiss loaded with the .308 | 186gr | Peregrine Glider GRM. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,749 fps; across all powders the maximum-charge window runs from 1,572 fps to 2,749 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 48–90 %, leaving at least 10 % headroom. The 186.0 gr projectile in 0.308" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, ADI AR 2209 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 | 186gr | Peregrine Glider GRM they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 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.