Load Specifications
Load data in caliber .375 R Hoelderlin with .375 | 256gr | Sologne GPA bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 52, Hodgdon LEVERevolution and ReloadSwiss RS 60.
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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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 45,730 psi | 88% | 2438 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 46,876 psi | 90% | 2490 fps | 99.9% |
| Accurate 2495 | <<locked>> | 94% | 44,585 psi | 85% | 2484 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 44,367 psi | 85% | 2493 fps | 99.6% |
| Accurate 4064 | <<locked>> | 96% | 44,237 psi | 85% | 2510 fps | 99.9% |
| Accurate LT-30 | <<locked>> | 82% | 47,137 psi | 90% | 2395 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 44,672 psi | 86% | 2490 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 96% | 45,687 psi | 88% | 2487 fps | 96.9% |
| ADI AR 2219 | <<locked>> | 82% | 45,847 psi | 88% | 2490 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 47,239 psi | 90% | 2507 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 90% | 45,440 psi | 87% | 2503 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 45,020 psi | 86% | 2546 fps | 98.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 46,644 psi | 89% | 2612 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 46,746 psi | 90% | 2549 fps | 98.7% |
| Alliant Reloder-10x | <<locked>> | 84% | 45,977 psi | 88% | 2448 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 45,034 psi | 86% | 2520 fps | 97% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 44,382 psi | 85% | 2582 fps | 97.6% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 45,600 psi | 87% | 2392 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 46,833 psi | 90% | 2543 fps | 96.7% |
| Bofors RP3 | <<locked>> | 98% | 46,369 psi | 89% | 2556 fps | 98.7% |
| Hodgdon Benchmark | <<locked>> | 88% | 47,079 psi | 90% | 2457 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 90% | 45,078 psi | 86% | 2526 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 88% | 46,543 psi | 89% | 2598 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 84% | 44,672 psi | 86% | 2470 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 45,513 psi | 87% | 2493 fps | 99.9% |
| Hodgdon H4895 | <<locked>> | 90% | 44,918 psi | 86% | 2503 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 45,948 psi | 88% | 2569 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,881 psi | 65% | 1532 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 46,369 psi | 89% | 2510 fps | 98.2% |
| IMR 3031 | <<locked>> | 92% | 46,180 psi | 88% | 2549 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 45,063 psi | 86% | 2470 fps | 97% |
| IMR 4198 | <<locked>> | 84% | 47,065 psi | 90% | 2418 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 46,035 psi | 88% | 2549 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 90% | 47,239 psi | 90% | 2507 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 86% | 46,789 psi | 90% | 2497 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 92% | 45,513 psi | 87% | 2520 fps | 99.7% |
| Lovex S060 | <<locked>> | 90% | 46,035 psi | 88% | 2441 fps | 97.6% |
| Lovex S062 | <<locked>> | 96% | 47,036 psi | 90% | 2520 fps | 99% |
| Norma 201 | <<locked>> | 92% | 46,427 psi | 89% | 2493 fps | 98.8% |
| Norma 202 | <<locked>> | 92% | 46,412 psi | 89% | 2507 fps | 99.9% |
| Norma 203B | <<locked>> | 96% | 47,065 psi | 90% | 2559 fps | 98% |
| Ramshot Big Game | <<locked>> | 94% | 44,193 psi | 85% | 2523 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 90% | 46,412 psi | 89% | 2530 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 86% | 45,759 psi | 88% | 2461 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,997 psi | 65% | 1568 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 47,065 psi | 90% | 2500 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 46,818 psi | 90% | 2615 fps | 97.4% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 44,353 psi | 85% | 2595 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 88% | 45,078 psi | 86% | 2451 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 94% | 46,746 psi | 90% | 2490 fps | 98.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 46,064 psi | 88% | 2543 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 92% | 45,513 psi | 87% | 2520 fps | 99.7% |
| Shooters World Precision | <<locked>> | 96% | 47,036 psi | 90% | 2520 fps | 99% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 47,152 psi | 90% | 2464 fps | 98.6% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 46,311 psi | 89% | 2497 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 45,513 psi | 87% | 2552 fps | 97.5% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 46,920 psi | 90% | 2464 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 45,948 psi | 88% | 2510 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 46,238 psi | 89% | 2418 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 45,092 psi | 86% | 2415 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 44,933 psi | 86% | 2493 fps | 98.8% |
| Somchem S335 | <<locked>> | 90% | 45,223 psi | 87% | 2421 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 44,672 psi | 86% | 2477 fps | 97.3% |
| Somchem S355 | <<locked>> | 98% | 44,541 psi | 85% | 2503 fps | 97.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 34,011 psi | 65% | 2379 fps | 96.1% |
| Vihtavuori N130 | <<locked>> | 86% | 46,441 psi | 89% | 2405 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 45,977 psi | 88% | 2415 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 45,092 psi | 86% | 2477 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 46,804 psi | 90% | 2490 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 45,571 psi | 87% | 2490 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 88% | 44,686 psi | 86% | 2461 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 94% | 45,208 psi | 87% | 2487 fps | 99.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 42,076 psi | 81% | 2428 fps | 96.9% |
| Winchester 748 | <<locked>> | 90% | 45,876 psi | 88% | 2543 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 92% | 45,049 psi | 86% | 2516 fps | 98.1% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 35,665 psi | 68% | 2270 fps | 99.9% |
| Accurate 2460 | <<locked>> | 80% | 38,392 psi | 74% | 2349 fps | 99% |
| Accurate 2495 | <<locked>> | 80% | 28,079 psi | 54% | 2175 fps | 99.2% |
| Accurate 2520 | <<locked>> | 80% | 33,750 psi | 65% | 2297 fps | 97.8% |
| Accurate 4064 | <<locked>> | 80% | 26,629 psi | 51% | 2149 fps | 96.5% |
| Accurate LT-30 | <<locked>> | 80% | 44,237 psi | 85% | 2349 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 37,144 psi | 71% | 2349 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 92% | 40,466 psi | 78% | 2395 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 42,917 psi | 82% | 2444 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 34,592 psi | 66% | 2274 fps | 96% |
| Alliant AR-Comp | <<locked>> | 80% | 32,909 psi | 63% | 2293 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 39,363 psi | 75% | 2441 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 43,627 psi | 84% | 2556 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 34,127 psi | 65% | 2316 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 40,698 psi | 78% | 2365 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 39,610 psi | 76% | 2421 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 94% | 36,434 psi | 70% | 2418 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 42,728 psi | 82% | 2346 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 40,988 psi | 79% | 2441 fps | 95.2% |
| Bofors RP3 | <<locked>> | 88% | 33,373 psi | 64% | 2316 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,912 psi | 71% | 2277 fps | 97.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 32,155 psi | 62% | 2280 fps | 96% |
| Hodgdon CFE223 | <<locked>> | 84% | 40,640 psi | 78% | 2490 fps | 95.8% |
| Hodgdon H322 | <<locked>> | 80% | 39,320 psi | 75% | 2382 fps | 99.8% |
| Hodgdon H335 | <<locked>> | 80% | 39,624 psi | 76% | 2395 fps | 99.3% |
| Hodgdon H4895 | <<locked>> | 82% | 34,998 psi | 67% | 2313 fps | 95.4% |
| Hodgdon LEVERevolution | 56.2 gr | 84% | 33,315 psi | 64% | 2320 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,135 psi | 48% | 1368 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 36,129 psi | 69% | 2320 fps | 95.7% |
| IMR 3031 | <<locked>> | 80% | 31,357 psi | 60% | 2277 fps | 99.2% |
| IMR 4064 | <<locked>> | 90% | 39,798 psi | 76% | 2379 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 41,814 psi | 80% | 2339 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 35,781 psi | 69% | 2359 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 34,592 psi | 66% | 2274 fps | 96% |
| Lovex D073.5 | <<locked>> | 80% | 38,189 psi | 73% | 2349 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 80% | 30,385 psi | 58% | 2234 fps | 96.7% |
| Lovex S060 | <<locked>> | 82% | 36,216 psi | 69% | 2260 fps | 95.1% |
| Lovex S062 | <<locked>> | 84% | 32,489 psi | 62% | 2247 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 32,097 psi | 61% | 2218 fps | 95.3% |
| Norma 202 | <<locked>> | 80% | 31,894 psi | 61% | 2238 fps | 97.8% |
| Norma 203B | <<locked>> | 88% | 36,448 psi | 70% | 2365 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 90% | 38,885 psi | 74% | 2425 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 38,043 psi | 73% | 2379 fps | 95.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 37,724 psi | 72% | 2316 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,150 psi | 48% | 1401 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 38,870 psi | 74% | 2359 fps | 98.5% |
| ReloadSwiss RS 52 | 58.2 gr | 88% | 38,537 psi | 74% | 2461 fps | 95.2% |
| ReloadSwiss RS 60 | 57.8 gr | 86% | 30,298 psi | 58% | 2277 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 35,694 psi | 68% | 2280 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 32,460 psi | 62% | 2221 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 90% | 33,330 psi | 64% | 2306 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 30,385 psi | 58% | 2234 fps | 96.7% |
| Shooters World Precision | <<locked>> | 84% | 32,489 psi | 62% | 2247 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 41,220 psi | 79% | 2369 fps | 97.5% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 43,279 psi | 83% | 2451 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 37,637 psi | 72% | 2405 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 41,249 psi | 79% | 2375 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 38,087 psi | 73% | 2369 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,924 psi | 65% | 2201 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 27,499 psi | 53% | 2077 fps | 97.3% |
| Somchem S321 | <<locked>> | 80% | 36,666 psi | 70% | 2343 fps | 97.1% |
| Somchem S335 | <<locked>> | 80% | 33,359 psi | 64% | 2208 fps | 98.8% |
| Somchem S341 | <<locked>> | 84% | 36,622 psi | 70% | 2329 fps | 95% |
| Somchem S355 | <<locked>> | 90% | 34,809 psi | 67% | 2320 fps | 95.3% |
| Somchem S365 | <<locked>> | 98% | 31,937 psi | 61% | 2326 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 38,609 psi | 74% | 2283 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 33,837 psi | 65% | 2211 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 80% | 28,877 psi | 55% | 2178 fps | 99.2% |
| Vihtavuori N140 | <<locked>> | 80% | 30,168 psi | 58% | 2182 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 88% | 31,053 psi | 59% | 2218 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 34,360 psi | 66% | 2267 fps | 96.1% |
| Vihtavuori N540 | <<locked>> | 80% | 28,819 psi | 55% | 2165 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 36,869 psi | 71% | 2329 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 32,982 psi | 63% | 2297 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 84% | 34,592 psi | 66% | 2320 fps | 95.3% |
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 75 powders for .375 R Hoelderlin loaded with the .375 | 256gr | Sologne GPA. ReloadSwiss RS 52 delivers the highest muzzle velocity at 2,615 fps; across all powders the maximum-charge window runs from 1,532 fps to 2,615 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 75 of the 75 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (360 MPa), the top charges use 65–90 %, leaving at least 10 % headroom. The 256.0 gr projectile in 0.375" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-17, Hodgdon TrailBoss, ReloadSwiss RS 14 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 52, Hodgdon LEVERevolution, ReloadSwiss RS 60 rank at the top here: for .375 R Hoelderlin with the .375 | 256gr | Sologne GPA 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.