Load Specifications
Load data in caliber .375 Hoelderlin with .375 | 300gr | Swift A-Frame bullet and 90 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and Alliant Power Pro 2000-MR.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 48,196 psi | 87% | 2287 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 49,269 psi | 89% | 2346 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 48,327 psi | 88% | 2343 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 47,340 psi | 86% | 2356 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 48,254 psi | 88% | 2379 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,644 psi | 85% | 2431 fps | 98.7% |
| ADI AR 2206H | <<locked>> | 86% | 46,949 psi | 85% | 2362 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 92% | 47,819 psi | 87% | 2359 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 86% | 49,284 psi | 89% | 2365 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 49,139 psi | 89% | 2349 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 48,791 psi | 89% | 2497 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 47,036 psi | 85% | 2379 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 90% | 47,776 psi | 87% | 2395 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,572 psi | 85% | 2441 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 96% | 46,978 psi | 85% | 2474 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 32,866 psi | 60% | 2208 fps | 96.7% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 49,400 psi | 90% | 2418 fps | 99.1% |
| Bofors RP3 | <<locked>> | 92% | 46,891 psi | 85% | 2392 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 48,486 psi | 88% | 2313 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 47,834 psi | 87% | 2392 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 49,284 psi | 89% | 2470 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 92% | 48,399 psi | 88% | 2398 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 98% | 47,108 psi | 85% | 2431 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 86% | 47,297 psi | 86% | 2372 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,540 psi | 77% | 2336 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 48,776 psi | 89% | 2441 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,766 psi | 63% | 1440 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 48,660 psi | 88% | 2375 fps | 99.8% |
| IMR 3031 | <<locked>> | 88% | 49,690 psi | 90% | 2402 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 47,326 psi | 86% | 2346 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 88% | 48,109 psi | 87% | 2326 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 94% | 47,123 psi | 86% | 2343 fps | 95.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,657 psi | 81% | 2385 fps | 98.4% |
| IMR 4895 | <<locked>> | 90% | 48,936 psi | 89% | 2425 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 86% | 49,284 psi | 89% | 2365 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 49,168 psi | 89% | 2356 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 48,878 psi | 89% | 2388 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 47,558 psi | 86% | 2306 fps | 99.4% |
| Lovex S062 | <<locked>> | 90% | 47,036 psi | 85% | 2349 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 48,805 psi | 89% | 2379 fps | 97.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 49,327 psi | 90% | 2408 fps | 96.8% |
| Norma 201 | <<locked>> | 88% | 48,965 psi | 89% | 2362 fps | 100% |
| Norma 202 | <<locked>> | 88% | 49,153 psi | 89% | 2365 fps | 100% |
| Norma 203B | <<locked>> | 90% | 46,963 psi | 85% | 2385 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 46,673 psi | 85% | 2428 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 90% | 46,746 psi | 85% | 2405 fps | 99.4% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 45,977 psi | 83% | 2418 fps | 96.8% |
| Ramshot TAC | <<locked>> | 86% | 49,487 psi | 90% | 2379 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 86% | 48,704 psi | 88% | 2398 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 82% | 47,311 psi | 86% | 2326 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,244 psi | 64% | 1476 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 48,950 psi | 89% | 2352 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 48,965 psi | 89% | 2382 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 47,123 psi | 86% | 2448 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 46,949 psi | 85% | 2480 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,296 psi | 84% | 2451 fps | 98.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,500 psi | 86% | 2470 fps | 98% |
| Rottweil R 901 | <<locked>> | 84% | 47,413 psi | 86% | 2310 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 49,458 psi | 90% | 2362 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 49,835 psi | 90% | 2425 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 98% | 48,805 psi | 89% | 2379 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 48,878 psi | 89% | 2388 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 47,036 psi | 85% | 2349 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 49,327 psi | 90% | 2408 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 48,341 psi | 88% | 2434 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 48,051 psi | 87% | 2264 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 47,456 psi | 86% | 2356 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 48,399 psi | 88% | 2382 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 47,964 psi | 87% | 2274 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 47,485 psi | 86% | 2274 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 48,965 psi | 89% | 2339 fps | 96.4% |
| Somchem S321 | <<locked>> | 82% | 46,818 psi | 85% | 2352 fps | 99.9% |
| Somchem S335 | <<locked>> | 86% | 47,224 psi | 86% | 2277 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 47,079 psi | 85% | 2352 fps | 99.4% |
| Somchem S355 | <<locked>> | 94% | 47,659 psi | 86% | 2382 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,437 psi | 75% | 2382 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 82% | 48,080 psi | 87% | 2247 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 48,051 psi | 87% | 2264 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 48,341 psi | 88% | 2333 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 49,676 psi | 90% | 2349 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 48,762 psi | 88% | 2365 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 49,139 psi | 89% | 2425 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 86% | 49,763 psi | 90% | 2369 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 47,732 psi | 87% | 2346 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 48,225 psi | 88% | 2431 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 34,664 psi | 63% | 2274 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 47,021 psi | 85% | 2372 fps | 99.7% |
| Winchester 748 | <<locked>> | 86% | 48,718 psi | 88% | 2408 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 47,108 psi | 85% | 2431 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 88% | 47,819 psi | 87% | 2388 fps | 99.8% |
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% | 42,554 psi | 77% | 2211 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,137 psi | 84% | 2303 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,041 psi | 64% | 2146 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,234 psi | 75% | 2267 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 33,170 psi | 60% | 2136 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 33,040 psi | 60% | 2195 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 38,943 psi | 71% | 2228 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 33,344 psi | 61% | 2103 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,944 psi | 74% | 2238 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 80% | 40,263 psi | 73% | 2231 fps | 100% |
| Alliant Power Pro 2000-MR | 57 gr | 80% | 35,041 psi | 64% | 2238 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,430 psi | 59% | 2123 fps | 97.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,867 psi | 63% | 2172 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 90% | 34,374 psi | 62% | 2205 fps | 95.5% |
| Alliant Reloder-17 | 57.5 gr | 82% | 29,733 psi | 54% | 2126 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 30,893 psi | 56% | 2162 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,782 psi | 69% | 2228 fps | 96.9% |
| Bofors RP3 | <<locked>> | 80% | 31,575 psi | 57% | 2119 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,033 psi | 78% | 2231 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,059 psi | 71% | 2254 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,975 psi | 78% | 2372 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 82% | 35,012 psi | 64% | 2169 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 96% | 44,106 psi | 80% | 2382 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 39,262 psi | 71% | 2238 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 29,559 psi | 54% | 2077 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,099 psi | 64% | 2211 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,831 psi | 47% | 1286 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,739 psi | 68% | 2198 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 38,276 psi | 69% | 2238 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,925 psi | 63% | 2129 fps | 96.7% |
| IMR 4166 Enduron | <<locked>> | 86% | 45,136 psi | 82% | 2280 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 44,425 psi | 81% | 2300 fps | 95.2% |
| IMR 4831 | <<locked>> | 90% | 32,343 psi | 59% | 2159 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 35,679 psi | 65% | 2198 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 80% | 40,944 psi | 74% | 2238 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 80% | 45,803 psi | 83% | 2310 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 37,463 psi | 68% | 2215 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 39,769 psi | 72% | 2178 fps | 98.3% |
| Lovex S062 | <<locked>> | 80% | 34,635 psi | 63% | 2136 fps | 98.4% |
| Lovex S065 | <<locked>> | 90% | 38,435 psi | 70% | 2208 fps | 95.3% |
| Lovex S070 | <<locked>> | 96% | 43,526 psi | 79% | 2316 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 38,348 psi | 70% | 2192 fps | 99.1% |
| Norma 202 | <<locked>> | 80% | 38,392 psi | 70% | 2201 fps | 100% |
| Norma 203B | <<locked>> | 80% | 34,272 psi | 62% | 2162 fps | 97.1% |
| Norma URP | <<locked>> | 90% | 34,127 psi | 62% | 2201 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 33,634 psi | 61% | 2169 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 96% | 40,437 psi | 73% | 2323 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 40,799 psi | 74% | 2238 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,943 psi | 72% | 2257 fps | 98.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,280 psi | 80% | 2277 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,194 psi | 48% | 1319 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,064 psi | 84% | 2310 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 40,553 psi | 74% | 2247 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 35,969 psi | 65% | 2251 fps | 97% |
| ReloadSwiss RS 60 | 56.1 gr | 80% | 29,718 psi | 54% | 2136 fps | 98.1% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 35,505 psi | 64% | 2257 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 38,928 psi | 71% | 2316 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 42,018 psi | 76% | 2228 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,419 psi | 66% | 2149 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 80% | 29,704 psi | 54% | 2070 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 38,435 psi | 70% | 2208 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,463 psi | 68% | 2215 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 34,635 psi | 63% | 2136 fps | 98.4% |
| Shooters World SW4350 | <<locked>> | 96% | 43,526 psi | 79% | 2316 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 30,980 psi | 56% | 2113 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 40,059 psi | 73% | 2152 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,740 psi | 70% | 2211 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,550 psi | 68% | 2201 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,914 psi | 72% | 2156 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,822 psi | 60% | 2044 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 42,786 psi | 78% | 2247 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 43,888 psi | 80% | 2306 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 39,465 psi | 72% | 2162 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,493 psi | 70% | 2215 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 30,980 psi | 56% | 2083 fps | 96.5% |
| Somchem S365 | <<locked>> | 84% | 25,266 psi | 46% | 2018 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 45,223 psi | 82% | 2211 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,059 psi | 73% | 2152 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,375 psi | 64% | 2139 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,143 psi | 66% | 2146 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 29,196 psi | 53% | 2028 fps | 97.3% |
| Vihtavuori N160 | <<locked>> | 88% | 33,591 psi | 61% | 2156 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 40,886 psi | 74% | 2234 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 34,824 psi | 63% | 2139 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 34,838 psi | 63% | 2201 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 96% | 30,647 psi | 56% | 2182 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 29,921 psi | 54% | 2051 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 39,827 psi | 72% | 2270 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 44,324 psi | 80% | 2385 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,564 psi | 66% | 2205 fps | 98.2% |
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 90 powders for .375 Hoelderlin loaded with the .375 | 300gr | Swift A-Frame. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,497 fps; across all powders the maximum-charge window runs from 1,440 fps to 2,497 fps. Accurate 4350 gives the best case fill at 100 %, and 90 of the 90 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.375" calls for a 1:6.0 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. ReloadSwiss RS 60, Alliant Reloder-17, Alliant Power Pro 2000-MR rank at the top here: for .375 Hoelderlin with the .375 | 300gr | Swift A-Frame 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.