Load Specifications
Load data in caliber .33 Win. with .338 | 250gr | Nosler Partition RN bullet and 58 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, IMR 3031 and Hodgdon LEVERevolution.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 39,972 psi | 90% | 2041 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 38,189 psi | 86% | 2077 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 39,146 psi | 88% | 2106 fps | 99.3% |
| Accurate 2520 | <<locked>> | 86% | 39,146 psi | 88% | 2106 fps | 99.3% |
| Accurate 4064 | <<locked>> | 92% | 38,334 psi | 87% | 2103 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 86% | 38,812 psi | 88% | 2080 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 92% | 39,885 psi | 90% | 2080 fps | 96% |
| ADI Benchmark 8208 | <<locked>> | 84% | 38,856 psi | 88% | 2057 fps | 97.8% |
| Alliant AR-Comp | <<locked>> | 86% | 39,276 psi | 89% | 2096 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 38,058 psi | 86% | 2093 fps | 97.5% |
| Alliant Reloder-15 | <<locked>> | 90% | 39,073 psi | 88% | 2106 fps | 96.1% |
| Alliant Reloder-17 | <<locked>> | 96% | 38,319 psi | 87% | 2152 fps | 96.5% |
| Bofors RP3 | <<locked>> | 94% | 39,929 psi | 90% | 2139 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 82% | 38,943 psi | 88% | 2018 fps | 98.3% |
| Hodgdon BL-C2 | <<locked>> | 86% | 38,696 psi | 87% | 2110 fps | 98.4% |
| Hodgdon H322 | <<locked>> | 82% | 38,189 psi | 86% | 2057 fps | 99.8% |
| Hodgdon H4895 | <<locked>> | 86% | 39,059 psi | 88% | 2090 fps | 97.3% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 39,581 psi | 89% | 2146 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,794 psi | 76% | 1312 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 39,552 psi | 89% | 2083 fps | 97.2% |
| IMR 3031 | <<locked>> | 90% | 38,725 psi | 88% | 2116 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 38,667 psi | 87% | 2054 fps | 95.9% |
| IMR 4895 | <<locked>> | 90% | 39,929 psi | 90% | 2133 fps | 97% |
| IMR 8208 XBR | <<locked>> | 84% | 38,856 psi | 88% | 2057 fps | 97.8% |
| Lovex D073.6 | <<locked>> | 88% | 39,146 psi | 88% | 2106 fps | 99.3% |
| Lovex S060 | <<locked>> | 84% | 38,072 psi | 86% | 2001 fps | 96.3% |
| Lovex S062 | <<locked>> | 90% | 38,464 psi | 87% | 2070 fps | 97.9% |
| Norma 201 | <<locked>> | 86% | 38,087 psi | 86% | 2047 fps | 97.7% |
| Norma 202 | <<locked>> | 86% | 37,913 psi | 86% | 2060 fps | 99.4% |
| Norma 203B | <<locked>> | 90% | 38,305 psi | 87% | 2096 fps | 96.5% |
| Ramshot Big Game | <<locked>> | 90% | 38,276 psi | 87% | 2110 fps | 96% |
| Ramshot Wild Boar | <<locked>> | 86% | 39,885 psi | 90% | 2110 fps | 96.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 39,624 psi | 90% | 2051 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,997 psi | 77% | 1345 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 38,174 psi | 86% | 2162 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 84% | 39,552 psi | 89% | 2051 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 88% | 38,334 psi | 87% | 2044 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 96% | 39,842 psi | 90% | 2129 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 88% | 39,146 psi | 88% | 2106 fps | 99.3% |
| Shooters World Precision | <<locked>> | 90% | 38,464 psi | 87% | 2070 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 39,479 psi | 89% | 2136 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 39,943 psi | 90% | 2100 fps | 96.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 38,116 psi | 86% | 1988 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 39,436 psi | 89% | 2024 fps | 99.9% |
| Somchem S321 | <<locked>> | 82% | 38,551 psi | 87% | 2077 fps | 98.1% |
| Somchem S335 | <<locked>> | 86% | 39,450 psi | 89% | 2024 fps | 99.8% |
| Somchem S341 | <<locked>> | 86% | 38,479 psi | 87% | 2067 fps | 96.3% |
| Somchem S355 | <<locked>> | 94% | 38,566 psi | 87% | 2093 fps | 97.1% |
| Somchem S365ᴾ | <<locked>> | 100% | 33,315 psi | 75% | 2067 fps | 96.5% |
| Vihtavuori N133 | <<locked>> | 84% | 37,942 psi | 86% | 1988 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 39,334 psi | 89% | 2080 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 38,232 psi | 86% | 2047 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 96% | 39,537 psi | 89% | 2090 fps | 98.5% |
| Vihtavuori N530 | <<locked>> | 84% | 38,682 psi | 87% | 2051 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 90% | 38,986 psi | 88% | 2077 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 38,580 psi | 87% | 2067 fps | 96.5% |
| Winchester 748 | <<locked>> | 82% | 37,391 psi | 85% | 2087 fps | 98.4% |
| Winchester StaBALL Match | <<locked>> | 82% | 39,943 psi | 90% | 2119 fps | 97.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 35,273 psi | 80% | 1969 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 27,760 psi | 63% | 1890 fps | 99.5% |
| Accurate 2520 | <<locked>> | 80% | 31,807 psi | 72% | 1978 fps | 97.8% |
| Accurate 2520 | <<locked>> | 80% | 31,807 psi | 72% | 1978 fps | 97.8% |
| Accurate 4064 | <<locked>> | 80% | 26,339 psi | 60% | 1870 fps | 97.1% |
| ADI AR 2206H | <<locked>> | 82% | 34,432 psi | 78% | 1998 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 90% | 37,463 psi | 85% | 2037 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 34,171 psi | 77% | 1972 fps | 96.5% |
| Alliant AR-Comp | <<locked>> | 80% | 32,445 psi | 73% | 1985 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 31,546 psi | 71% | 1972 fps | 95.4% |
| Alliant Reloder-15 | <<locked>> | 88% | 36,622 psi | 83% | 2064 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 94% | 35,766 psi | 81% | 2103 fps | 95.6% |
| Bofors RP3 | <<locked>> | 86% | 30,763 psi | 70% | 1972 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,579 psi | 83% | 1978 fps | 97.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 31,575 psi | 71% | 1978 fps | 96.5% |
| Hodgdon H322 | <<locked>> | 80% | 35,940 psi | 81% | 2018 fps | 99.7% |
| Hodgdon H4895 | <<locked>> | 80% | 32,401 psi | 73% | 1965 fps | 95.2% |
| Hodgdon LEVERevolution | 38.4 gr | 86% | 33,025 psi | 75% | 2021 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,150 psi | 57% | 1171 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 33,112 psi | 75% | 1965 fps | 95.3% |
| IMR 3031 | 32.6 gr | 80% | 28,413 psi | 64% | 1919 fps | 98.9% |
| IMR 4064 | <<locked>> | 90% | 36,492 psi | 82% | 2014 fps | 95.3% |
| IMR 4895 | <<locked>> | 86% | 35,041 psi | 79% | 2047 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 34,171 psi | 77% | 1972 fps | 96.5% |
| Lovex D073.6 | <<locked>> | 80% | 29,921 psi | 68% | 1939 fps | 97.2% |
| Lovex S060 | <<locked>> | 82% | 35,752 psi | 81% | 1959 fps | 95.5% |
| Lovex S062 | <<locked>> | 82% | 30,139 psi | 68% | 1913 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 31,850 psi | 72% | 1929 fps | 95.9% |
| Norma 202 | <<locked>> | 80% | 31,604 psi | 71% | 1946 fps | 98.3% |
| Norma 203B | <<locked>> | 86% | 33,634 psi | 76% | 2011 fps | 95% |
| Ramshot Big Game | <<locked>> | 88% | 35,752 psi | 81% | 2060 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 82% | 34,896 psi | 79% | 2021 fps | 95.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 37,260 psi | 84% | 2011 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,164 psi | 57% | 1198 fps | 100% |
| ReloadSwiss RS 60 | 39.4 gr | 86% | 29,834 psi | 67% | 1982 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 35,288 psi | 80% | 1975 fps | 98.8% |
| Rottweil R 902 | <<locked>> | 80% | 30,269 psi | 68% | 1890 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 90% | 32,793 psi | 74% | 2005 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 29,921 psi | 68% | 1939 fps | 97.2% |
| Shooters World Precision | <<locked>> | 82% | 30,139 psi | 68% | 1913 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 37,115 psi | 84% | 2093 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 35,230 psi | 80% | 2018 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,576 psi | 76% | 1909 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 27,209 psi | 62% | 1804 fps | 97.8% |
| Somchem S321 | <<locked>> | 80% | 36,172 psi | 82% | 2034 fps | 97.5% |
| Somchem S335 | <<locked>> | 80% | 33,069 psi | 75% | 1916 fps | 99.1% |
| Somchem S341 | <<locked>> | 84% | 36,085 psi | 82% | 2024 fps | 95.5% |
| Somchem S355 | <<locked>> | 88% | 32,184 psi | 73% | 1975 fps | 95.1% |
| Somchem S365 | <<locked>> | 98% | 31,285 psi | 71% | 2021 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 33,475 psi | 76% | 1916 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 80% | 28,514 psi | 64% | 1890 fps | 99.5% |
| Vihtavuori N140 | <<locked>> | 80% | 29,631 psi | 67% | 1893 fps | 98% |
| Vihtavuori N150 | <<locked>> | 86% | 28,703 psi | 65% | 1886 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 33,910 psi | 77% | 1969 fps | 96.6% |
| Vihtavuori N540 | <<locked>> | 80% | 28,500 psi | 64% | 1883 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 36,303 psi | 82% | 2028 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 35,070 psi | 79% | 2044 fps | 97.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,202 psi | 84% | 2073 fps | 96.8% |
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 84 powders for .33 Win. loaded with the .338 | 250gr | Nosler Partition RN. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,162 fps; across all powders the maximum-charge window runs from 1,312 fps to 2,162 fps. Accurate 4350 gives the best case fill at 100 %, and 84 of the 84 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 72–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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, IMR 3031, Hodgdon LEVERevolution rank at the top here: for .33 Win. with the .338 | 250gr | Nosler Partition RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4350, Alliant Power Pro 2000-MR, Alliant Reloder-16 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.