Load Specifications
Load data in caliber .33 Win. with .338 | 225gr | NorthFork Bonded Core bullet and 46 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 Winchester 748.
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>> | 86% | 39,146 psi | 88% | 2152 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 39,871 psi | 90% | 2192 fps | 98.9% |
| Accurate 2495 | <<locked>> | 94% | 39,421 psi | 89% | 2224 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 39,900 psi | 90% | 2231 fps | 98.6% |
| Accurate 4064 | <<locked>> | 96% | 39,450 psi | 89% | 2247 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 86% | 38,290 psi | 87% | 2162 fps | 96.5% |
| Alliant AR-Comp | <<locked>> | 88% | 38,435 psi | 87% | 2215 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 38,174 psi | 86% | 2228 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 39,450 psi | 89% | 2238 fps | 96.6% |
| Alliant Reloder-10x | <<locked>> | 82% | 39,827 psi | 90% | 2169 fps | 100% |
| Bofors RP3 | <<locked>> | 96% | 38,783 psi | 88% | 2241 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 38,464 psi | 87% | 2123 fps | 97.1% |
| Hodgdon BL-C2 | <<locked>> | 88% | 37,797 psi | 85% | 2215 fps | 97.1% |
| Hodgdon H322 | <<locked>> | 82% | 38,305 psi | 87% | 2178 fps | 99.4% |
| Hodgdon H335 | <<locked>> | 82% | 38,624 psi | 87% | 2192 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 88% | 38,580 psi | 87% | 2198 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 39,175 psi | 89% | 2251 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,243 psi | 75% | 1385 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 39,813 psi | 90% | 2201 fps | 96% |
| IMR 3031 | <<locked>> | 90% | 39,030 psi | 88% | 2247 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 38,290 psi | 87% | 2162 fps | 96.5% |
| Lovex D073.5 | <<locked>> | 84% | 39,523 psi | 89% | 2188 fps | 97.8% |
| Lovex D073.6 | <<locked>> | 90% | 38,159 psi | 86% | 2215 fps | 98.3% |
| Lovex S062 | <<locked>> | 92% | 37,608 psi | 85% | 2172 fps | 96.5% |
| Norma 201 | <<locked>> | 90% | 39,871 psi | 90% | 2195 fps | 97.1% |
| Norma 202 | <<locked>> | 90% | 39,639 psi | 90% | 2211 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,344 psi | 75% | 1417 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 37,942 psi | 86% | 2156 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 37,826 psi | 86% | 2260 fps | 97.4% |
| Rottweil R 901 | <<locked>> | 86% | 39,030 psi | 88% | 2162 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 90% | 37,710 psi | 85% | 2149 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 98% | 38,435 psi | 87% | 2224 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 90% | 38,159 psi | 86% | 2215 fps | 98.3% |
| Shooters World Precision | <<locked>> | 92% | 37,608 psi | 85% | 2172 fps | 96.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 39,827 psi | 90% | 2129 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 38,798 psi | 88% | 2133 fps | 99.4% |
| Somchem S321 | <<locked>> | 84% | 37,985 psi | 86% | 2185 fps | 96.8% |
| Somchem S335 | <<locked>> | 88% | 38,870 psi | 88% | 2136 fps | 99.3% |
| Vihtavuori N130 | <<locked>> | 82% | 37,782 psi | 85% | 2090 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 39,508 psi | 89% | 2136 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 38,029 psi | 86% | 2185 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 39,914 psi | 90% | 2195 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 98% | 38,450 psi | 87% | 2188 fps | 97.2% |
| Vihtavuori N530 | <<locked>> | 86% | 38,087 psi | 86% | 2156 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 92% | 38,261 psi | 86% | 2185 fps | 98.7% |
| Winchester 748 | <<locked>> | 88% | 38,957 psi | 88% | 2231 fps | 97.7% |
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% | 32,576 psi | 74% | 2037 fps | 99.4% |
| Accurate 2460 | <<locked>> | 80% | 34,751 psi | 79% | 2103 fps | 97.8% |
| Accurate 2495 | <<locked>> | 80% | 25,092 psi | 57% | 1942 fps | 98% |
| Accurate 2520 | <<locked>> | 80% | 30,429 psi | 69% | 2054 fps | 96.1% |
| Accurate 4064 | <<locked>> | 82% | 25,251 psi | 57% | 1955 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 33,736 psi | 76% | 2077 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 29,863 psi | 68% | 2054 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 35,723 psi | 81% | 2178 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 35,027 psi | 79% | 2156 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 37,289 psi | 84% | 2126 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 33,968 psi | 77% | 2152 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 34,185 psi | 77% | 2044 fps | 95.9% |
| Hodgdon BL-C2 | <<locked>> | 84% | 33,083 psi | 75% | 2123 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 80% | 35,839 psi | 81% | 2136 fps | 99% |
| Hodgdon H335 | <<locked>> | 80% | 36,230 psi | 82% | 2149 fps | 98.4% |
| Hodgdon H4895 | <<locked>> | 86% | 36,216 psi | 82% | 2156 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 36,579 psi | 83% | 2201 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,540 psi | 55% | 1234 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 37,362 psi | 84% | 2159 fps | 95.3% |
| IMR 3031 | 34.2 gr | 80% | 28,442 psi | 64% | 2034 fps | 98% |
| IMR 8208 XBR | <<locked>> | 82% | 33,736 psi | 76% | 2077 fps | 95% |
| Lovex D073.5 | <<locked>> | 80% | 34,505 psi | 78% | 2100 fps | 96.5% |
| Lovex D073.6 | <<locked>> | 82% | 29,037 psi | 66% | 2034 fps | 95.5% |
| Lovex S062 | <<locked>> | 88% | 33,373 psi | 75% | 2090 fps | 95.1% |
| Norma 201 | <<locked>> | 84% | 33,199 psi | 75% | 2067 fps | 95% |
| Norma 202 | <<locked>> | 80% | 28,877 psi | 65% | 1998 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,758 psi | 56% | 1266 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 35,592 psi | 80% | 2113 fps | 97.2% |
| ReloadSwiss RS 60 | 42.7 gr | 92% | 33,257 psi | 75% | 2162 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 32,793 psi | 74% | 2041 fps | 97.2% |
| Rottweil R 902 | <<locked>> | 86% | 33,417 psi | 76% | 2067 fps | 95% |
| Rottweil R 903 | <<locked>> | 96% | 35,955 psi | 81% | 2182 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 29,037 psi | 66% | 2034 fps | 95.5% |
| Shooters World Precision | <<locked>> | 88% | 33,373 psi | 75% | 2090 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,314 psi | 71% | 1972 fps | 96.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 25,338 psi | 57% | 1860 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 33,286 psi | 75% | 2093 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 30,705 psi | 69% | 1982 fps | 97.6% |
| Vihtavuori N130 | <<locked>> | 80% | 35,621 psi | 81% | 2054 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 31,067 psi | 70% | 1985 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 80% | 26,165 psi | 59% | 1949 fps | 98.1% |
| Vihtavuori N140 | <<locked>> | 80% | 27,398 psi | 62% | 1949 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 92% | 31,923 psi | 72% | 2064 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 82% | 33,417 psi | 76% | 2070 fps | 95% |
| Vihtavuori N540 | <<locked>> | 82% | 27,963 psi | 63% | 1978 fps | 95.5% |
| Winchester 748 | 38 gr | 82% | 32,082 psi | 73% | 2096 fps | 95.5% |
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 46 powders for .33 Win. loaded with the .338 | 225gr | NorthFork Bonded Core. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,260 fps; across all powders the maximum-charge window runs from 1,385 fps to 2,260 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 46 of the 46 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 75–90 %, leaving at least 10 % headroom. The 225.0 gr projectile in 0.338" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14 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, Winchester 748 rank at the top here: for .33 Win. with the .338 | 225gr | NorthFork Bonded Core 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.