Load Specifications
Load data in caliber .375 Hoelderlin with .375 | 300gr | Atomic 29 HP bullet and 90 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 52 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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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>> | 88% | 48,457 psi | 88% | 2264 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 46,630 psi | 85% | 2283 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 47,630 psi | 86% | 2313 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 47,645 psi | 86% | 2333 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 47,514 psi | 86% | 2346 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 39,784 psi | 72% | 2293 fps | 96.7% |
| Accurate LT-30 | <<locked>> | 82% | 49,458 psi | 90% | 2221 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 49,850 psi | 90% | 2238 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 47,630 psi | 86% | 2336 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 96% | 48,486 psi | 88% | 2333 fps | 98.7% |
| ADI AR 2219 | <<locked>> | 82% | 48,849 psi | 89% | 2320 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 47,369 psi | 86% | 2303 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 90% | 49,240 psi | 89% | 2329 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 48,109 psi | 87% | 2385 fps | 99.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 46,659 psi | 85% | 2418 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 47,210 psi | 86% | 2349 fps | 99.6% |
| Alliant Reloder-10x | <<locked>> | 84% | 48,747 psi | 88% | 2270 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 48,022 psi | 87% | 2365 fps | 98.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 41,394 psi | 75% | 2306 fps | 97% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 47,442 psi | 86% | 2441 fps | 99.5% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 48,182 psi | 87% | 2224 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 46,920 psi | 85% | 2346 fps | 98.2% |
| Bofors RP3 | <<locked>> | 96% | 46,818 psi | 85% | 2359 fps | 99.6% |
| Hodgdon Benchmark | <<locked>> | 88% | 49,588 psi | 90% | 2293 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 90% | 48,385 psi | 88% | 2369 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 86% | 46,717 psi | 85% | 2398 fps | 98.7% |
| Hodgdon H322 | <<locked>> | 84% | 47,848 psi | 87% | 2306 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 48,370 psi | 88% | 2326 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 48,660 psi | 88% | 2365 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 90% | 47,964 psi | 87% | 2346 fps | 99.5% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 37,507 psi | 68% | 2211 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 49,284 psi | 89% | 2415 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,142 psi | 62% | 1398 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 49,414 psi | 90% | 2352 fps | 99.6% |
| IMR 3031 | <<locked>> | 92% | 49,821 psi | 90% | 2379 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 47,935 psi | 87% | 2316 fps | 98.8% |
| IMR 4198 | <<locked>> | 84% | 49,850 psi | 90% | 2241 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 38,653 psi | 70% | 2254 fps | 96.4% |
| IMR 4895 | <<locked>> | 94% | 49,226 psi | 89% | 2395 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 88% | 47,369 psi | 86% | 2303 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 86% | 49,864 psi | 90% | 2333 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 48,849 psi | 89% | 2359 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 48,544 psi | 88% | 2283 fps | 99.2% |
| Lovex S062 | <<locked>> | 94% | 47,224 psi | 86% | 2320 fps | 99.7% |
| Lovex S065ᴾ | <<locked>> | 100% | 46,180 psi | 84% | 2303 fps | 96.5% |
| Norma 201 | <<locked>> | 92% | 49,371 psi | 90% | 2336 fps | 99.8% |
| Norma 202 | <<locked>> | 92% | 49,661 psi | 90% | 2343 fps | 100% |
| Norma 203B | <<locked>> | 94% | 47,152 psi | 86% | 2356 fps | 99.1% |
| Norma URPᴾ | <<locked>> | 100% | 40,828 psi | 74% | 2297 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 94% | 47,384 psi | 86% | 2375 fps | 99% |
| Ramshot TAC | <<locked>> | 88% | 47,601 psi | 86% | 2310 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 90% | 49,632 psi | 90% | 2375 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 86% | 48,443 psi | 88% | 2306 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,301 psi | 62% | 1434 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 46,905 psi | 85% | 2290 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 49,719 psi | 90% | 2352 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 47,224 psi | 86% | 2415 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 47,442 psi | 86% | 2448 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 40,205 psi | 73% | 2313 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 88% | 47,529 psi | 86% | 2283 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 49,690 psi | 90% | 2329 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 49,647 psi | 90% | 2388 fps | 99.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 46,180 psi | 84% | 2303 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 92% | 48,849 psi | 89% | 2359 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 47,224 psi | 86% | 2320 fps | 99.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 46,833 psi | 85% | 2264 fps | 99.5% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 49,168 psi | 89% | 2329 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 48,660 psi | 88% | 2402 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 49,763 psi | 90% | 2287 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 48,312 psi | 88% | 2329 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 48,994 psi | 89% | 2356 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 48,936 psi | 89% | 2254 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 48,225 psi | 88% | 2251 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 47,688 psi | 87% | 2329 fps | 99.8% |
| Somchem S335 | <<locked>> | 90% | 47,834 psi | 87% | 2254 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 47,950 psi | 87% | 2329 fps | 99.1% |
| Somchem S355 | <<locked>> | 98% | 47,747 psi | 87% | 2352 fps | 99.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,289 psi | 66% | 2254 fps | 98.7% |
| Vihtavuori N130 | <<locked>> | 86% | 49,052 psi | 89% | 2231 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 48,863 psi | 89% | 2244 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 48,428 psi | 88% | 2306 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 47,050 psi | 85% | 2287 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 48,965 psi | 89% | 2336 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 43,279 psi | 79% | 2300 fps | 97.1% |
| Vihtavuori N530 | <<locked>> | 88% | 47,340 psi | 86% | 2300 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 94% | 48,283 psi | 88% | 2323 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 41,989 psi | 76% | 2303 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 44,599 psi | 81% | 2290 fps | 99% |
| Winchester 748 | <<locked>> | 90% | 49,472 psi | 90% | 2385 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 92% | 48,472 psi | 88% | 2365 fps | 99.5% |
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% | 37,826 psi | 69% | 2116 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 40,625 psi | 74% | 2195 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 29,689 psi | 54% | 2031 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 35,955 psi | 65% | 2152 fps | 99.4% |
| Accurate 4064 | <<locked>> | 80% | 28,181 psi | 51% | 2014 fps | 98.6% |
| Accurate 4350 | <<locked>> | 96% | 34,606 psi | 63% | 2201 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 46,702 psi | 85% | 2185 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,094 psi | 85% | 2201 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 34,693 psi | 63% | 2116 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 84% | 33,518 psi | 61% | 2077 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 45,788 psi | 83% | 2280 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,695 psi | 67% | 2133 fps | 98.2% |
| Alliant AR-Comp | <<locked>> | 80% | 35,143 psi | 64% | 2136 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 42,192 psi | 77% | 2293 fps | 98.9% |
| Alliant Power Pro 2000-MR | 54.7 gr | 84% | 35,708 psi | 65% | 2215 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 28,210 psi | 51% | 2005 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,091 psi | 78% | 2195 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 32,735 psi | 59% | 2100 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 96% | 36,622 psi | 66% | 2215 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 88% | 31,908 psi | 58% | 2146 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 45,179 psi | 82% | 2185 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 35,824 psi | 65% | 2159 fps | 95.5% |
| Bofors RP3 | <<locked>> | 82% | 28,993 psi | 53% | 2041 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 38,827 psi | 70% | 2129 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,330 psi | 62% | 2142 fps | 98.3% |
| Hodgdon CFE223 | <<locked>> | 80% | 37,927 psi | 69% | 2247 fps | 96.9% |
| Hodgdon H322 | <<locked>> | 80% | 41,771 psi | 76% | 2221 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 42,221 psi | 77% | 2241 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 37,260 psi | 68% | 2182 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 34,867 psi | 63% | 2126 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 31,227 psi | 57% | 2083 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,067 psi | 56% | 2093 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,280 psi | 46% | 1247 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 33,707 psi | 61% | 2090 fps | 96.7% |
| IMR 3031 | <<locked>> | 80% | 33,431 psi | 61% | 2133 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 32,924 psi | 60% | 2060 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 44,237 psi | 80% | 2169 fps | 100% |
| IMR 4831 | <<locked>> | 98% | 36,289 psi | 66% | 2211 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 31,357 psi | 57% | 2080 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 36,695 psi | 67% | 2133 fps | 98.2% |
| Lovex D073.5 | <<locked>> | 80% | 40,335 psi | 73% | 2198 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 32,474 psi | 59% | 2100 fps | 98.7% |
| Lovex S060 | <<locked>> | 80% | 35,737 psi | 65% | 2073 fps | 96.7% |
| Lovex S062 | <<locked>> | 80% | 30,284 psi | 55% | 2021 fps | 96.5% |
| Lovex S065 | <<locked>> | 96% | 40,814 psi | 74% | 2218 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 33,808 psi | 61% | 2080 fps | 97.6% |
| Norma 202 | <<locked>> | 80% | 33,881 psi | 61% | 2096 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 32,082 psi | 58% | 2090 fps | 95.7% |
| Norma URP | <<locked>> | 96% | 36,027 psi | 65% | 2208 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 82% | 31,792 psi | 58% | 2096 fps | 95% |
| Ramshot TAC | <<locked>> | 84% | 41,597 psi | 75% | 2218 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 35,331 psi | 64% | 2142 fps | 96.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,871 psi | 72% | 2172 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,353 psi | 46% | 1276 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,191 psi | 75% | 2205 fps | 99.7% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 43,729 psi | 79% | 2260 fps | 95.1% |
| ReloadSwiss RS 52 | 51.7 gr | 82% | 33,620 psi | 61% | 2172 fps | 95.5% |
| ReloadSwiss RS 60 | 51.3 gr | 80% | 26,295 psi | 48% | 2008 fps | 95.4% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 37,550 psi | 68% | 2264 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 37,217 psi | 68% | 2123 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 80% | 32,097 psi | 58% | 2041 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 84% | 29,283 psi | 53% | 2041 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 40,814 psi | 74% | 2218 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,474 psi | 59% | 2100 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 30,284 psi | 55% | 2021 fps | 96.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 43,714 psi | 79% | 2218 fps | 99.1% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 46,006 psi | 83% | 2287 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 33,127 psi | 60% | 2133 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 43,874 psi | 80% | 2208 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 39,305 psi | 71% | 2188 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 33,301 psi | 60% | 2090 fps | 95.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,737 psi | 65% | 2057 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,066 psi | 53% | 1946 fps | 99.1% |
| Somchem S321 | <<locked>> | 80% | 38,957 psi | 71% | 2195 fps | 98.9% |
| Somchem S335 | <<locked>> | 80% | 35,085 psi | 64% | 2060 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 33,997 psi | 62% | 2100 fps | 96.1% |
| Somchem S355 | <<locked>> | 84% | 30,574 psi | 55% | 2051 fps | 95.7% |
| Somchem S365 | <<locked>> | 92% | 28,137 psi | 51% | 2067 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 40,756 psi | 74% | 2119 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 35,824 psi | 65% | 2060 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 30,806 psi | 56% | 2037 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 31,865 psi | 58% | 2041 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 80% | 25,382 psi | 46% | 1916 fps | 95% |
| Vihtavuori N160 | <<locked>> | 96% | 38,159 psi | 69% | 2211 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 36,405 psi | 66% | 2126 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 80% | 30,530 psi | 55% | 2031 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 96% | 36,869 psi | 67% | 2211 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 32,213 psi | 58% | 2067 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 35,186 psi | 64% | 2159 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 32,155 psi | 58% | 2087 fps | 96.3% |
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 90 powders for .375 Hoelderlin loaded with the .375 | 300gr | Atomic 29 HP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,448 fps; across all powders the maximum-charge window runs from 1,398 fps to 2,448 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 62–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.375" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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 52, ReloadSwiss RS 60 rank at the top here: for .375 Hoelderlin with the .375 | 300gr | Atomic 29 HP 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.