Load Specifications
Load data in caliber .375 Fl. Mag. N.E. with .375 | 340gr | Rhino Solid bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, ReloadSwiss RS 70 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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 41,582 psi | 88% | 2060 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 41,814 psi | 89% | 2096 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 39,900 psi | 85% | 2139 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 84% | 40,886 psi | 87% | 2073 fps | 98.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 41,162 psi | 87% | 2185 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 40,538 psi | 86% | 2093 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 82% | 40,770 psi | 86% | 2100 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 94% | 42,482 psi | 90% | 2192 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 42,496 psi | 90% | 2215 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,303 psi | 77% | 2113 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,001 psi | 85% | 2234 fps | 97.8% |
| Bofors RP3 | <<locked>> | 84% | 40,176 psi | 85% | 2100 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 84% | 41,147 psi | 87% | 2103 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 41,626 psi | 88% | 2139 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 41,481 psi | 88% | 2142 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,331 psi | 75% | 1335 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 40,567 psi | 86% | 2060 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 41,191 psi | 87% | 2146 fps | 98.5% |
| IMR 4895 | <<locked>> | 82% | 41,756 psi | 89% | 2126 fps | 99.4% |
| Lovex S062 | <<locked>> | 82% | 40,379 psi | 86% | 2060 fps | 99.7% |
| Lovex S065 | <<locked>> | 90% | 42,061 psi | 89% | 2096 fps | 97.3% |
| Lovex S070 | <<locked>> | 92% | 42,496 psi | 90% | 2123 fps | 96.3% |
| Norma 203B | <<locked>> | 82% | 40,161 psi | 85% | 2090 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 40,248 psi | 85% | 2139 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 84% | 42,409 psi | 90% | 2152 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 94% | 41,974 psi | 89% | 2175 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,708 psi | 76% | 1368 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,626 psi | 88% | 2090 fps | 96.4% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 42,409 psi | 90% | 2218 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 42,337 psi | 90% | 2201 fps | 98.4% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,059 psi | 85% | 2169 fps | 97.2% |
| Rottweil R 902 | <<locked>> | 82% | 42,279 psi | 90% | 2070 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 86% | 40,248 psi | 85% | 2093 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 42,061 psi | 89% | 2096 fps | 97.3% |
| Shooters World Precision | <<locked>> | 82% | 40,379 psi | 86% | 2060 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 92% | 42,496 psi | 90% | 2123 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 41,278 psi | 88% | 2139 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 40,654 psi | 86% | 2001 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 41,481 psi | 88% | 2054 fps | 95.7% |
| Somchem S355 | <<locked>> | 86% | 40,973 psi | 87% | 2093 fps | 99.5% |
| Somchem S365 | <<locked>> | 96% | 40,640 psi | 86% | 2185 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 41,655 psi | 88% | 2051 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 42,351 psi | 90% | 2064 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 41,800 psi | 89% | 2083 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 42,061 psi | 89% | 2136 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 82% | 40,625 psi | 86% | 2057 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 41,408 psi | 88% | 2142 fps | 98.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,986 psi | 83% | 2172 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 42,148 psi | 89% | 2119 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,372 psi | 69% | 2110 fps | 98.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 38,972 psi | 83% | 2021 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,854 psi | 78% | 2021 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 30,516 psi | 65% | 1965 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 36,289 psi | 77% | 1991 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,508 psi | 82% | 2136 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,752 psi | 76% | 2011 fps | 98.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,319 psi | 81% | 2057 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 84% | 31,488 psi | 67% | 1975 fps | 95.5% |
| Alliant Reloder-17 | 55.3 gr | 80% | 30,705 psi | 65% | 1985 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 90% | 26,934 psi | 57% | 1900 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 94% | 32,634 psi | 69% | 2083 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 35,128 psi | 75% | 2014 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 80% | 36,129 psi | 77% | 2018 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 27,079 psi | 57% | 1854 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,783 psi | 82% | 2096 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,397 psi | 56% | 1191 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,101 psi | 81% | 2018 fps | 98.3% |
| IMR 4831 | <<locked>> | 84% | 29,834 psi | 63% | 1932 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 39,247 psi | 83% | 2083 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 37,898 psi | 80% | 2021 fps | 99.5% |
| Lovex S065 | <<locked>> | 84% | 35,230 psi | 75% | 1978 fps | 95.3% |
| Lovex S070 | <<locked>> | 90% | 39,972 psi | 85% | 2080 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 37,710 psi | 80% | 2051 fps | 98.7% |
| Norma URP | <<locked>> | 84% | 31,314 psi | 66% | 1969 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 37,159 psi | 79% | 2064 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 37,014 psi | 79% | 2087 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,643 psi | 57% | 1220 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 38,986 psi | 83% | 2044 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,663 psi | 69% | 2037 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 32,489 psi | 69% | 2021 fps | 95.6% |
| ReloadSwiss RS 70 | 61.8 gr | 88% | 35,186 psi | 75% | 2073 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 39,697 psi | 84% | 2031 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 33,185 psi | 70% | 1972 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 35,230 psi | 75% | 1978 fps | 95.3% |
| Shooters World Precision | <<locked>> | 80% | 37,898 psi | 80% | 2021 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 90% | 39,972 psi | 85% | 2080 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,953 psi | 72% | 2008 fps | 97.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,911 psi | 76% | 1929 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 38,914 psi | 83% | 2014 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 34,098 psi | 72% | 1975 fps | 98.2% |
| Somchem S365 | 52.4 gr | 80% | 24,627 psi | 52% | 1841 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 80% | 39,160 psi | 83% | 2018 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,813 psi | 84% | 2028 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,416 psi | 69% | 1926 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 84% | 32,721 psi | 69% | 1969 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,174 psi | 81% | 2021 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 32,010 psi | 68% | 1972 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 90% | 28,587 psi | 61% | 1962 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,674 psi | 61% | 1867 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 94% | 26,861 psi | 57% | 1955 fps | 95.1% |
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 50 powders for .375 Fl. Mag. N.E. loaded with the .375 | 340gr | Rhino Solid. Alliant Reloder-26 delivers the highest muzzle velocity at 2,234 fps; across all powders the maximum-charge window runs from 1,335 fps to 2,234 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 50 of the 50 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 340.0 gr projectile in 0.375" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, Hodgdon TrailBoss 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. Somchem S365, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for .375 Fl. Mag. N.E. with the .375 | 340gr | Rhino Solid 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.