Load Specifications
Load data in caliber .375 R Hoelderlin with .375 | 300gr | Impala RNFP bullet and 77 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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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 45,905 psi | 88% | 2205 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 46,862 psi | 90% | 2267 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 44,628 psi | 85% | 2267 fps | 100% |
| Accurate 4064 | <<locked>> | 90% | 46,427 psi | 89% | 2300 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,369 psi | 89% | 2375 fps | 98.1% |
| ADI AR 2206H | <<locked>> | 86% | 47,050 psi | 90% | 2310 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 90% | 44,904 psi | 86% | 2264 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 46,557 psi | 89% | 2274 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 84% | 45,832 psi | 88% | 2264 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 45,484 psi | 87% | 2382 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 46,963 psi | 90% | 2326 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 88% | 44,918 psi | 86% | 2297 fps | 98.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,151 psi | 88% | 2375 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 96% | 46,441 psi | 89% | 2408 fps | 99.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,388 psi | 64% | 2159 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 45,919 psi | 88% | 2313 fps | 98.1% |
| Bofors RP3 | <<locked>> | 90% | 44,338 psi | 85% | 2297 fps | 99.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 45,788 psi | 88% | 2221 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 84% | 44,904 psi | 86% | 2300 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 82% | 45,585 psi | 87% | 2359 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 90% | 45,469 psi | 87% | 2297 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 84% | 44,846 psi | 86% | 2280 fps | 99.2% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,598 psi | 82% | 2280 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 45,469 psi | 87% | 2339 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,128 psi | 67% | 1407 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 45,484 psi | 87% | 2277 fps | 99.2% |
| IMR 3031 | <<locked>> | 86% | 46,456 psi | 89% | 2313 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 47,166 psi | 90% | 2290 fps | 98.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,280 psi | 85% | 2326 fps | 97.8% |
| IMR 4895 | <<locked>> | 88% | 45,919 psi | 88% | 2323 fps | 99% |
| IMR 8208 XBR | <<locked>> | 84% | 46,557 psi | 89% | 2274 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 86% | 45,963 psi | 88% | 2297 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 44,846 psi | 86% | 2211 fps | 98.7% |
| Lovex S062 | <<locked>> | 88% | 44,715 psi | 86% | 2257 fps | 99.5% |
| Lovex S065 | <<locked>> | 96% | 46,209 psi | 89% | 2283 fps | 96.6% |
| Norma 201 | <<locked>> | 86% | 46,528 psi | 89% | 2270 fps | 99.7% |
| Norma 202 | <<locked>> | 86% | 46,296 psi | 89% | 2277 fps | 100% |
| Norma 203B | <<locked>> | 90% | 47,007 psi | 90% | 2333 fps | 99.1% |
| Norma URPᴾ | <<locked>> | 100% | 46,180 psi | 88% | 2365 fps | 98% |
| Ramshot Big Game | <<locked>> | 90% | 46,427 psi | 89% | 2346 fps | 98.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 45,571 psi | 87% | 2356 fps | 95.9% |
| Ramshot TAC | <<locked>> | 84% | 46,340 psi | 89% | 2274 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 84% | 45,411 psi | 87% | 2293 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,563 psi | 68% | 1444 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 45,948 psi | 88% | 2277 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 46,630 psi | 89% | 2385 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 46,485 psi | 89% | 2418 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,963 psi | 88% | 2388 fps | 97.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 46,905 psi | 90% | 2398 fps | 97% |
| Rottweil R 901 | <<locked>> | 82% | 45,934 psi | 88% | 2228 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 47,050 psi | 90% | 2270 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 94% | 46,862 psi | 90% | 2329 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 46,209 psi | 89% | 2283 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 45,963 psi | 88% | 2297 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 44,715 psi | 86% | 2257 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 45,136 psi | 86% | 2333 fps | 98.8% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 44,788 psi | 86% | 2257 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 45,295 psi | 87% | 2283 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 45,382 psi | 87% | 2185 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 44,802 psi | 86% | 2192 fps | 100% |
| Somchem S321 | <<locked>> | 82% | 47,065 psi | 90% | 2300 fps | 99.8% |
| Somchem S335 | <<locked>> | 84% | 44,933 psi | 86% | 2192 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 46,905 psi | 90% | 2297 fps | 99% |
| Somchem S355 | <<locked>> | 92% | 45,078 psi | 86% | 2290 fps | 99.2% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,568 psi | 80% | 2329 fps | 99.6% |
| Vihtavuori N133 | <<locked>> | 84% | 45,281 psi | 87% | 2182 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 45,745 psi | 88% | 2251 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 46,601 psi | 89% | 2260 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 45,658 psi | 87% | 2274 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 98% | 45,832 psi | 88% | 2320 fps | 97.7% |
| Vihtavuori N530 | <<locked>> | 84% | 46,528 psi | 89% | 2270 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 88% | 44,860 psi | 86% | 2257 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 44,860 psi | 86% | 2329 fps | 97.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,201 psi | 67% | 2224 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 46,572 psi | 89% | 2310 fps | 99.3% |
| Winchester 748 | <<locked>> | 84% | 45,382 psi | 87% | 2310 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 44,585 psi | 85% | 2290 fps | 99.2% |
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% | 43,279 psi | 83% | 2169 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,912 psi | 71% | 2119 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,959 psi | 80% | 2224 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 34,882 psi | 67% | 2110 fps | 99.7% |
| Accurate 4350 | <<locked>> | 92% | 35,940 psi | 69% | 2198 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 39,552 psi | 76% | 2182 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 80% | 33,808 psi | 65% | 2060 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,365 psi | 79% | 2192 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 80% | 40,466 psi | 78% | 2188 fps | 100% |
| Alliant Power Pro 2000-MR | 52.9 gr | 80% | 35,534 psi | 68% | 2188 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,156 psi | 64% | 2083 fps | 97.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,607 psi | 68% | 2129 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 92% | 36,869 psi | 71% | 2201 fps | 95.6% |
| Alliant Reloder-17 | 54.7 gr | 84% | 32,489 psi | 62% | 2136 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,647 psi | 61% | 2116 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,189 psi | 73% | 2182 fps | 96.3% |
| Bofors RP3 | <<locked>> | 80% | 32,692 psi | 63% | 2087 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,323 psi | 83% | 2182 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,465 psi | 76% | 2211 fps | 99.2% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,902 psi | 82% | 2316 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 84% | 37,942 psi | 73% | 2169 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 39,871 psi | 76% | 2195 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 30,429 psi | 58% | 2037 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,636 psi | 68% | 2165 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,266 psi | 50% | 1257 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,087 psi | 73% | 2152 fps | 97.9% |
| IMR 3031 | <<locked>> | 80% | 38,624 psi | 74% | 2195 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,433 psi | 68% | 2087 fps | 96.2% |
| IMR 4831 | <<locked>> | 92% | 35,157 psi | 67% | 2162 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 36,405 psi | 70% | 2156 fps | 97.1% |
| IMR 8208 XBR | <<locked>> | 80% | 41,365 psi | 79% | 2192 fps | 99.1% |
| Lovex D073.6 | <<locked>> | 80% | 38,218 psi | 73% | 2172 fps | 99.6% |
| Lovex S060 | <<locked>> | 80% | 40,089 psi | 77% | 2129 fps | 97.9% |
| Lovex S062 | <<locked>> | 80% | 35,491 psi | 68% | 2096 fps | 98.1% |
| Lovex S065 | <<locked>> | 92% | 41,336 psi | 79% | 2205 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 39,320 psi | 75% | 2152 fps | 98.8% |
| Norma 202 | <<locked>> | 80% | 38,957 psi | 75% | 2159 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 35,099 psi | 67% | 2123 fps | 96.7% |
| Norma URP | <<locked>> | 92% | 36,651 psi | 70% | 2195 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 34,243 psi | 66% | 2123 fps | 96% |
| Ramshot Hunter | <<locked>> | 98% | 42,960 psi | 82% | 2310 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 41,220 psi | 79% | 2188 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,234 psi | 77% | 2208 fps | 97.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,745 psi | 51% | 1289 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 43,207 psi | 83% | 2234 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 36,376 psi | 70% | 2205 fps | 96.4% |
| ReloadSwiss RS 60 | 52.1 gr | 80% | 30,603 psi | 59% | 2096 fps | 97.7% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 38,261 psi | 73% | 2254 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 41,524 psi | 80% | 2306 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 43,453 psi | 83% | 2192 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 37,550 psi | 72% | 2113 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 80% | 30,922 psi | 59% | 2041 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 41,336 psi | 79% | 2205 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,218 psi | 73% | 2172 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 35,491 psi | 68% | 2096 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,734 psi | 61% | 2073 fps | 95.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,436 psi | 76% | 2165 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,884 psi | 73% | 2156 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,553 psi | 78% | 2113 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,533 psi | 64% | 2008 fps | 99.8% |
| Somchem S321 | <<locked>> | 80% | 44,251 psi | 85% | 2257 fps | 99.6% |
| Somchem S335 | <<locked>> | 80% | 40,190 psi | 77% | 2119 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,841 psi | 74% | 2169 fps | 97.5% |
| Somchem S355 | <<locked>> | 80% | 31,952 psi | 61% | 2047 fps | 96.2% |
| Somchem S365 | <<locked>> | 86% | 27,920 psi | 53% | 2031 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 40,466 psi | 78% | 2110 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,216 psi | 69% | 2103 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,680 psi | 70% | 2103 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 30,139 psi | 58% | 1995 fps | 97% |
| Vihtavuori N160 | <<locked>> | 90% | 36,201 psi | 69% | 2152 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 41,263 psi | 79% | 2185 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 80% | 35,534 psi | 68% | 2103 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 92% | 37,608 psi | 72% | 2201 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 98% | 33,388 psi | 64% | 2185 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 30,647 psi | 59% | 2011 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 40,045 psi | 77% | 2221 fps | 99.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,028 psi | 71% | 2159 fps | 97.8% |
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 77 powders for .375 R Hoelderlin loaded with the .375 | 300gr | Impala RNFP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,418 fps; across all powders the maximum-charge window runs from 1,407 fps to 2,418 fps. Accurate 4350 gives the best case fill at 100 %, and 77 of the 77 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (360 MPa), the top charges use 64–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.375" calls for a 1:16.5 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .375 R Hoelderlin with the .375 | 300gr | Impala RNFP 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.