Load Specifications
Load data in caliber .375 Hoelderlin with .375 | 300gr | Hornady BTSP bullet and 91 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 Power Pro 2000-MR and ReloadSwiss RS 52.
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>> | 86% | 49,400 psi | 90% | 2290 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 47,572 psi | 86% | 2310 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 49,487 psi | 90% | 2346 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 48,544 psi | 88% | 2359 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 49,110 psi | 89% | 2379 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 44,324 psi | 80% | 2382 fps | 98.1% |
| ADI AR 2206H | <<locked>> | 88% | 48,312 psi | 88% | 2365 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 94% | 49,197 psi | 89% | 2362 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 86% | 47,732 psi | 87% | 2329 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 86% | 47,036 psi | 85% | 2313 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 48,805 psi | 89% | 2411 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 46,963 psi | 85% | 2448 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 48,240 psi | 88% | 2382 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 82% | 49,371 psi | 90% | 2293 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 49,066 psi | 89% | 2398 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 44,686 psi | 81% | 2388 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 48,095 psi | 87% | 2474 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 47,427 psi | 86% | 2375 fps | 98.6% |
| Bofors RP3 | <<locked>> | 94% | 47,993 psi | 87% | 2392 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 49,850 psi | 90% | 2316 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 49,124 psi | 89% | 2395 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 47,326 psi | 86% | 2425 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 82% | 48,269 psi | 88% | 2326 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 48,791 psi | 89% | 2349 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 49,734 psi | 90% | 2402 fps | 98.4% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 48,138 psi | 87% | 2428 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 88% | 48,675 psi | 88% | 2375 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 40,857 psi | 74% | 2290 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 46,702 psi | 85% | 2398 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,650 psi | 63% | 1424 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 46,934 psi | 85% | 2336 fps | 99.5% |
| IMR 3031 | <<locked>> | 88% | 47,776 psi | 87% | 2365 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 48,617 psi | 88% | 2346 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 90% | 49,298 psi | 89% | 2326 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 96% | 48,428 psi | 88% | 2343 fps | 95.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,554 psi | 77% | 2336 fps | 97.8% |
| IMR 4895 | <<locked>> | 90% | 47,195 psi | 86% | 2382 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 86% | 47,732 psi | 87% | 2329 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 82% | 47,326 psi | 86% | 2316 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 46,775 psi | 85% | 2346 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 48,776 psi | 89% | 2306 fps | 99.4% |
| Lovex S062 | <<locked>> | 92% | 47,950 psi | 87% | 2346 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 46,934 psi | 85% | 2336 fps | 97.1% |
| Lovex S070ᴾ | <<locked>> | 100% | 47,297 psi | 86% | 2359 fps | 96.1% |
| Norma 201 | <<locked>> | 88% | 47,094 psi | 85% | 2320 fps | 99.8% |
| Norma 202 | <<locked>> | 88% | 47,500 psi | 86% | 2329 fps | 100% |
| Norma 203B | <<locked>> | 92% | 48,240 psi | 88% | 2388 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 44,628 psi | 81% | 2379 fps | 98% |
| Ramshot Big Game | <<locked>> | 92% | 47,993 psi | 87% | 2405 fps | 99.3% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 44,077 psi | 80% | 2369 fps | 96% |
| Ramshot TAC | <<locked>> | 86% | 47,805 psi | 87% | 2336 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 46,876 psi | 85% | 2356 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 84% | 48,617 psi | 88% | 2326 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,925 psi | 63% | 1460 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 47,253 psi | 86% | 2313 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 47,123 psi | 86% | 2336 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 48,356 psi | 88% | 2451 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 48,182 psi | 87% | 2480 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 44,237 psi | 80% | 2402 fps | 97.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 45,585 psi | 83% | 2418 fps | 97.2% |
| Rottweil R 901 | <<locked>> | 86% | 48,486 psi | 88% | 2310 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 47,630 psi | 86% | 2320 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 96% | 47,877 psi | 87% | 2382 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 98% | 46,934 psi | 85% | 2336 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 88% | 46,775 psi | 85% | 2346 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 47,950 psi | 87% | 2346 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 47,297 psi | 86% | 2359 fps | 96.1% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 49,429 psi | 90% | 2434 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 48,878 psi | 89% | 2359 fps | 98.1% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 49,719 psi | 90% | 2385 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 49,342 psi | 90% | 2277 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 48,805 psi | 89% | 2277 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 46,992 psi | 85% | 2297 fps | 95.7% |
| Somchem S321 | <<locked>> | 84% | 48,269 psi | 88% | 2356 fps | 99.9% |
| Somchem S335 | <<locked>> | 88% | 48,356 psi | 88% | 2277 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 48,457 psi | 88% | 2356 fps | 99.4% |
| Somchem S355 | <<locked>> | 96% | 48,776 psi | 89% | 2382 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,813 psi | 72% | 2339 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 84% | 49,516 psi | 90% | 2254 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 49,327 psi | 90% | 2267 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 49,429 psi | 90% | 2333 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 47,659 psi | 86% | 2310 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 46,949 psi | 85% | 2326 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,079 psi | 85% | 2379 fps | 98.3% |
| Vihtavuori N530 | <<locked>> | 86% | 47,921 psi | 87% | 2326 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 48,892 psi | 89% | 2349 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,006 psi | 83% | 2385 fps | 98% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 48,240 psi | 88% | 2369 fps | 99.7% |
| Winchester 748 | <<locked>> | 86% | 46,905 psi | 85% | 2365 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 48,370 psi | 88% | 2431 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 90% | 48,994 psi | 89% | 2392 fps | 99.7% |
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% | 41,060 psi | 75% | 2175 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 44,425 psi | 81% | 2264 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,460 psi | 61% | 2106 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 39,595 psi | 72% | 2228 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 31,676 psi | 57% | 2096 fps | 99.5% |
| Accurate 4350 | <<locked>> | 92% | 33,707 psi | 61% | 2198 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 37,550 psi | 68% | 2188 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 80% | 32,097 psi | 58% | 2064 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,552 psi | 72% | 2198 fps | 99% |
| Alliant AR-Comp | <<locked>> | 80% | 38,435 psi | 70% | 2195 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 45,687 psi | 83% | 2365 fps | 99.5% |
| Alliant Power Pro 2000-MR | 54.9 gr | 80% | 33,837 psi | 61% | 2195 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,038 psi | 56% | 2080 fps | 96.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,441 psi | 84% | 2254 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 33,533 psi | 61% | 2129 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 92% | 35,215 psi | 64% | 2208 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 84% | 30,516 psi | 55% | 2129 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,303 psi | 66% | 2185 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 30,284 psi | 55% | 2080 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,655 psi | 76% | 2195 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,565 psi | 68% | 2215 fps | 99.2% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,249 psi | 75% | 2326 fps | 98.1% |
| Hodgdon H322 | <<locked>> | 80% | 45,194 psi | 82% | 2287 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 45,788 psi | 83% | 2306 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 35,882 psi | 65% | 2172 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 98% | 45,223 psi | 82% | 2382 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 37,840 psi | 69% | 2198 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 30,226 psi | 55% | 2077 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,779 psi | 61% | 2169 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,831 psi | 47% | 1273 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,564 psi | 66% | 2159 fps | 97.8% |
| IMR 3031 | <<locked>> | 80% | 36,767 psi | 67% | 2201 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,620 psi | 61% | 2090 fps | 96% |
| IMR 4166 Enduron | <<locked>> | 88% | 46,383 psi | 84% | 2280 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 45,527 psi | 83% | 2300 fps | 95.1% |
| IMR 4831 | <<locked>> | 92% | 33,040 psi | 60% | 2159 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 34,301 psi | 62% | 2156 fps | 96.9% |
| IMR 8208 XBR | <<locked>> | 80% | 39,552 psi | 72% | 2198 fps | 99% |
| Lovex D073.5 | <<locked>> | 80% | 44,179 psi | 80% | 2270 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 35,824 psi | 65% | 2172 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 38,406 psi | 70% | 2139 fps | 97.8% |
| Lovex S062 | <<locked>> | 80% | 33,243 psi | 60% | 2096 fps | 97.8% |
| Lovex S065 | <<locked>> | 92% | 39,320 psi | 71% | 2211 fps | 95.2% |
| Lovex S070 | <<locked>> | 98% | 44,411 psi | 81% | 2313 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 36,898 psi | 67% | 2152 fps | 98.6% |
| Norma 202 | <<locked>> | 80% | 36,912 psi | 67% | 2165 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 32,938 psi | 60% | 2119 fps | 96.4% |
| Norma URP | <<locked>> | 92% | 34,766 psi | 63% | 2198 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 32,416 psi | 59% | 2126 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 98% | 41,466 psi | 75% | 2323 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 39,508 psi | 72% | 2198 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,522 psi | 70% | 2218 fps | 97.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,844 psi | 78% | 2241 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,962 psi | 47% | 1302 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,367 psi | 81% | 2270 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 41,626 psi | 76% | 2247 fps | 95% |
| ReloadSwiss RS 52 | 53.2 gr | 80% | 34,461 psi | 63% | 2205 fps | 96.2% |
| ReloadSwiss RS 60 | 54 gr | 80% | 28,631 psi | 52% | 2090 fps | 97.3% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 36,172 psi | 66% | 2257 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 40,001 psi | 73% | 2316 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 40,611 psi | 74% | 2192 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 35,215 psi | 64% | 2113 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 80% | 28,572 psi | 52% | 2031 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 39,320 psi | 71% | 2211 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,824 psi | 65% | 2172 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 33,243 psi | 60% | 2096 fps | 97.8% |
| Shooters World SW4350 | <<locked>> | 98% | 44,411 psi | 81% | 2313 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 31,691 psi | 57% | 2116 fps | 95.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 37,376 psi | 68% | 2172 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,129 psi | 66% | 2162 fps | 97.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,595 psi | 70% | 2119 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,633 psi | 57% | 2008 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 43,947 psi | 80% | 2251 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 42,192 psi | 77% | 2264 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 38,072 psi | 69% | 2126 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 36,970 psi | 67% | 2172 fps | 97.4% |
| Somchem S355 | <<locked>> | 80% | 29,675 psi | 54% | 2041 fps | 95.7% |
| Somchem S365 | <<locked>> | 88% | 27,470 psi | 50% | 2064 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 43,772 psi | 79% | 2178 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,696 psi | 70% | 2119 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,924 psi | 62% | 2103 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,940 psi | 63% | 2110 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 28,137 psi | 51% | 1991 fps | 96.6% |
| Vihtavuori N160 | <<locked>> | 90% | 34,403 psi | 62% | 2159 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 39,508 psi | 72% | 2195 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 80% | 33,373 psi | 61% | 2100 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 92% | 35,534 psi | 64% | 2201 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 30,719 psi | 56% | 2054 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 38,218 psi | 69% | 2228 fps | 99.4% |
| Winchester 760 | <<locked>> | 98% | 45,223 psi | 82% | 2382 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,157 psi | 64% | 2162 fps | 97.6% |
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 91 powders for .375 Hoelderlin loaded with the .375 | 300gr | Hornady BTSP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,480 fps; across all powders the maximum-charge window runs from 1,424 fps to 2,480 fps. Accurate 4350 gives the best case fill at 100 %, and 91 of the 91 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 63–90 %, 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, Hodgdon H414 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 Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for .375 Hoelderlin with the .375 | 300gr | Hornady BTSP 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.