Load Specifications
Load data in caliber .33 Win. with .338 | 225gr | Speer Boat-Tail bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Hodgdon BL-C2 and Lovex D073.6.
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% | 39,885 psi | 90% | 2172 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 37,782 psi | 85% | 2165 fps | 98.6% |
| Accurate 2495 | <<locked>> | 92% | 37,855 psi | 86% | 2205 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 38,000 psi | 86% | 2208 fps | 98.4% |
| Accurate 4064 | <<locked>> | 94% | 37,594 psi | 85% | 2221 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 86% | 38,885 psi | 88% | 2182 fps | 96.8% |
| Alliant AR-Comp | <<locked>> | 88% | 39,218 psi | 89% | 2234 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 38,928 psi | 88% | 2251 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 37,869 psi | 86% | 2218 fps | 96.3% |
| Bofors RP3 | <<locked>> | 96% | 39,392 psi | 89% | 2257 fps | 96.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 39,059 psi | 88% | 2142 fps | 97.4% |
| Hodgdon BL-C2 | <<locked>> | 88% | 38,406 psi | 87% | 2231 fps | 97.4% |
| Hodgdon H322 | <<locked>> | 82% | 38,725 psi | 88% | 2195 fps | 99.5% |
| Hodgdon H335 | <<locked>> | 82% | 39,291 psi | 89% | 2211 fps | 99% |
| Hodgdon H4895 | <<locked>> | 88% | 39,189 psi | 89% | 2218 fps | 96.2% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 39,668 psi | 90% | 2270 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,272 psi | 75% | 1391 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 39,697 psi | 90% | 2264 fps | 99.9% |
| IMR 4895 | <<locked>> | 92% | 39,798 psi | 90% | 2257 fps | 95.9% |
| IMR 8208 XBR | <<locked>> | 86% | 38,885 psi | 88% | 2182 fps | 96.8% |
| Lovex D073.5 | <<locked>> | 82% | 37,420 psi | 85% | 2159 fps | 97.4% |
| Lovex D073.6 | <<locked>> | 90% | 38,827 psi | 88% | 2231 fps | 98.5% |
| Lovex S062 | <<locked>> | 92% | 38,232 psi | 86% | 2188 fps | 96.8% |
| Norma 201 | <<locked>> | 88% | 38,087 psi | 86% | 2169 fps | 96.7% |
| Norma 202 | <<locked>> | 88% | 37,826 psi | 86% | 2185 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,359 psi | 75% | 1424 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 38,595 psi | 87% | 2175 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 38,435 psi | 87% | 2283 fps | 97.7% |
| Rottweil R 901 | <<locked>> | 86% | 39,465 psi | 89% | 2175 fps | 98.9% |
| Rottweil R 902 | <<locked>> | 90% | 38,305 psi | 87% | 2165 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 98% | 39,291 psi | 89% | 2247 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 90% | 38,827 psi | 88% | 2231 fps | 98.5% |
| Shooters World Precision | <<locked>> | 92% | 38,232 psi | 86% | 2188 fps | 96.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 38,276 psi | 87% | 2113 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 39,407 psi | 89% | 2149 fps | 99.6% |
| Somchem S321 | <<locked>> | 84% | 38,595 psi | 87% | 2201 fps | 97.1% |
| Somchem S335 | <<locked>> | 88% | 39,508 psi | 89% | 2152 fps | 99.5% |
| Somchem S355 | <<locked>> | 96% | 38,290 psi | 87% | 2215 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 82% | 38,537 psi | 87% | 2110 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 38,000 psi | 86% | 2116 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 92% | 38,740 psi | 88% | 2205 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 38,029 psi | 86% | 2172 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 98% | 39,218 psi | 89% | 2208 fps | 97.5% |
| Vihtavuori N530 | <<locked>> | 86% | 38,711 psi | 88% | 2175 fps | 96.8% |
| Vihtavuori N540 | <<locked>> | 92% | 39,088 psi | 88% | 2208 fps | 98.9% |
| Winchester 748 | <<locked>> | 88% | 39,566 psi | 89% | 2251 fps | 97.9% |
| Winchester StaBALL Match | <<locked>> | 90% | 38,914 psi | 88% | 2224 fps | 96.1% |
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% | 33,083 psi | 75% | 2054 fps | 99.5% |
| Accurate 2460 | <<locked>> | 80% | 35,462 psi | 80% | 2123 fps | 98.1% |
| Accurate 2495 | <<locked>> | 80% | 25,556 psi | 58% | 1959 fps | 98.3% |
| Accurate 2520 | <<locked>> | 80% | 30,792 psi | 70% | 2067 fps | 96.4% |
| Accurate 4064 | <<locked>> | 82% | 25,889 psi | 59% | 1975 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 34,330 psi | 78% | 2096 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 80% | 30,284 psi | 68% | 2070 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 36,477 psi | 82% | 2201 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 35,578 psi | 80% | 2172 fps | 95.6% |
| Bofors RP3 | <<locked>> | 92% | 34,534 psi | 78% | 2169 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 34,563 psi | 78% | 2057 fps | 96.1% |
| Hodgdon BL-C2 | 39.3 gr | 82% | 31,589 psi | 71% | 2096 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 80% | 36,260 psi | 82% | 2149 fps | 99.2% |
| Hodgdon H335 | <<locked>> | 80% | 36,593 psi | 83% | 2165 fps | 98.5% |
| Hodgdon H4895 | <<locked>> | 86% | 36,811 psi | 83% | 2175 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 34,911 psi | 79% | 2175 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,656 psi | 56% | 1240 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 29,066 psi | 66% | 2054 fps | 98.3% |
| IMR 4895 | <<locked>> | 90% | 37,347 psi | 84% | 2211 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 82% | 34,330 psi | 78% | 2096 fps | 95.4% |
| Lovex D073.5 | <<locked>> | 80% | 35,114 psi | 79% | 2116 fps | 96.8% |
| Lovex D073.6 | 37.1 gr | 80% | 27,804 psi | 63% | 2011 fps | 95.1% |
| Lovex S062 | <<locked>> | 88% | 33,982 psi | 77% | 2110 fps | 95.5% |
| Norma 201 | <<locked>> | 84% | 33,591 psi | 76% | 2083 fps | 95.3% |
| Norma 202 | <<locked>> | 80% | 29,486 psi | 67% | 2018 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,874 psi | 56% | 1276 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,245 psi | 82% | 2133 fps | 97.5% |
| ReloadSwiss RS 60 | 43.4 gr | 92% | 33,852 psi | 77% | 2185 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 33,214 psi | 75% | 2057 fps | 97.5% |
| Rottweil R 902 | <<locked>> | 86% | 34,026 psi | 77% | 2087 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 96% | 36,825 psi | 83% | 2205 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 27,804 psi | 63% | 2011 fps | 95.1% |
| Shooters World Precision | <<locked>> | 88% | 33,982 psi | 77% | 2110 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,705 psi | 72% | 1988 fps | 97.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 25,701 psi | 58% | 1873 fps | 96% |
| Somchem S321 | <<locked>> | 80% | 33,837 psi | 76% | 2110 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 31,082 psi | 70% | 1995 fps | 97.8% |
| Somchem S355 | <<locked>> | 94% | 35,926 psi | 81% | 2169 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 36,143 psi | 82% | 2070 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 31,488 psi | 71% | 1998 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 80% | 26,571 psi | 60% | 1965 fps | 98.4% |
| Vihtavuori N140 | <<locked>> | 80% | 27,949 psi | 63% | 1969 fps | 96.3% |
| Vihtavuori N150 | <<locked>> | 92% | 32,401 psi | 73% | 2080 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 82% | 34,084 psi | 77% | 2090 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 26,629 psi | 60% | 1949 fps | 95% |
| Winchester 748 | <<locked>> | 82% | 32,605 psi | 74% | 2113 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 88% | 36,390 psi | 82% | 2178 fps | 95.2% |
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 47 powders for .33 Win. loaded with the .338 | 225gr | Speer Boat-Tail. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,283 fps; across all powders the maximum-charge window runs from 1,391 fps to 2,283 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 47 of the 47 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, Hodgdon BL-C2, Lovex D073.6 rank at the top here: for .33 Win. with the .338 | 225gr | Speer Boat-Tail 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.