Load Specifications
Load data in caliber .33 Win. with .338 | 225gr | Speer Deep Curl Soft Point 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, Accurate 4064 and IMR 3031.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 37,956 psi | 86% | 2146 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 38,319 psi | 87% | 2178 fps | 98.8% |
| Accurate 2495 | <<locked>> | 92% | 38,435 psi | 87% | 2218 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 38,522 psi | 87% | 2221 fps | 98.5% |
| Accurate 4064 | <<locked>> | 94% | 38,406 psi | 87% | 2241 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 86% | 39,363 psi | 89% | 2195 fps | 97% |
| Alliant AR-Comp | <<locked>> | 88% | 39,726 psi | 90% | 2244 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 39,291 psi | 89% | 2260 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 38,319 psi | 87% | 2228 fps | 96.5% |
| Bofors RP3 | <<locked>> | 94% | 37,608 psi | 85% | 2231 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 39,581 psi | 89% | 2156 fps | 97.6% |
| Hodgdon BL-C2 | <<locked>> | 88% | 39,117 psi | 88% | 2251 fps | 97.7% |
| Hodgdon H322 | <<locked>> | 82% | 39,276 psi | 89% | 2208 fps | 99.6% |
| Hodgdon H335 | <<locked>> | 82% | 39,769 psi | 90% | 2224 fps | 99.2% |
| Hodgdon H4895 | <<locked>> | 88% | 39,682 psi | 90% | 2231 fps | 96.4% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 37,724 psi | 85% | 2241 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,344 psi | 75% | 1398 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 38,377 psi | 87% | 2192 fps | 95.9% |
| IMR 3031 | <<locked>> | 88% | 37,739 psi | 85% | 2238 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 39,363 psi | 89% | 2195 fps | 97% |
| Lovex D073.5 | <<locked>> | 82% | 38,174 psi | 86% | 2178 fps | 97.7% |
| Lovex D073.6 | <<locked>> | 90% | 39,291 psi | 89% | 2244 fps | 98.7% |
| Lovex S062 | <<locked>> | 92% | 39,001 psi | 88% | 2208 fps | 97.1% |
| Norma 201 | <<locked>> | 88% | 38,580 psi | 87% | 2185 fps | 96.9% |
| Norma 202 | <<locked>> | 88% | 38,363 psi | 87% | 2198 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,460 psi | 76% | 1430 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 39,102 psi | 88% | 2188 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 39,001 psi | 88% | 2303 fps | 98% |
| Rottweil R 901 | <<locked>> | 84% | 37,681 psi | 85% | 2149 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 90% | 38,798 psi | 88% | 2182 fps | 97% |
| Rottweil R 903 | <<locked>> | 98% | 39,740 psi | 90% | 2260 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 90% | 39,291 psi | 89% | 2244 fps | 98.7% |
| Shooters World Precision | <<locked>> | 92% | 39,001 psi | 88% | 2208 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 38,508 psi | 87% | 2119 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 39,856 psi | 90% | 2162 fps | 99.6% |
| Somchem S321 | <<locked>> | 84% | 39,305 psi | 89% | 2218 fps | 97.4% |
| Somchem S335 | <<locked>> | 88% | 40,001 psi | 90% | 2165 fps | 99.6% |
| Somchem S355 | <<locked>> | 96% | 38,986 psi | 88% | 2231 fps | 96.2% |
| Vihtavuori N130 | <<locked>> | 82% | 38,856 psi | 88% | 2119 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 38,261 psi | 86% | 2126 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 92% | 39,305 psi | 89% | 2218 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 38,522 psi | 87% | 2185 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 98% | 39,610 psi | 90% | 2218 fps | 97.7% |
| Vihtavuori N530 | <<locked>> | 86% | 39,189 psi | 89% | 2188 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 92% | 39,537 psi | 89% | 2218 fps | 99% |
| Winchester 748 | <<locked>> | 88% | 39,987 psi | 90% | 2264 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 39,334 psi | 89% | 2238 fps | 96.3% |
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% | 33,359 psi | 75% | 2064 fps | 99.6% |
| Accurate 2460 | <<locked>> | 80% | 35,752 psi | 81% | 2133 fps | 98.2% |
| Accurate 2495 | <<locked>> | 80% | 25,846 psi | 58% | 1969 fps | 98.4% |
| Accurate 2520 | <<locked>> | 80% | 31,299 psi | 71% | 2080 fps | 96.6% |
| Accurate 4064 | 35.6 gr | 80% | 24,555 psi | 56% | 1946 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 34,621 psi | 78% | 2106 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 80% | 30,589 psi | 69% | 2080 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 36,811 psi | 83% | 2215 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 33,852 psi | 77% | 2142 fps | 95.1% |
| Bofors RP3 | <<locked>> | 92% | 34,983 psi | 79% | 2182 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 35,070 psi | 79% | 2073 fps | 96.4% |
| Hodgdon BL-C2 | <<locked>> | 82% | 32,010 psi | 72% | 2113 fps | 95.5% |
| Hodgdon H322 | <<locked>> | 80% | 36,840 psi | 83% | 2165 fps | 99.3% |
| Hodgdon H335 | <<locked>> | 80% | 37,101 psi | 84% | 2178 fps | 98.7% |
| Hodgdon H4895 | <<locked>> | 86% | 37,304 psi | 84% | 2188 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 35,520 psi | 80% | 2195 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,845 psi | 56% | 1250 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 36,114 psi | 82% | 2149 fps | 95.1% |
| IMR 3031 | 35.2 gr | 80% | 29,356 psi | 66% | 2064 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 82% | 34,621 psi | 78% | 2106 fps | 95.6% |
| Lovex D073.5 | <<locked>> | 80% | 35,607 psi | 80% | 2133 fps | 97% |
| Lovex D073.6 | <<locked>> | 80% | 28,036 psi | 63% | 2021 fps | 95.3% |
| Lovex S062 | <<locked>> | 86% | 32,387 psi | 73% | 2080 fps | 95% |
| Norma 201 | <<locked>> | 84% | 34,098 psi | 77% | 2096 fps | 95.6% |
| Norma 202 | <<locked>> | 80% | 29,747 psi | 67% | 2031 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,787 psi | 56% | 1276 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,477 psi | 82% | 2142 fps | 97.7% |
| ReloadSwiss RS 60 | 43 gr | 90% | 32,213 psi | 73% | 2152 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 33,533 psi | 76% | 2067 fps | 97.6% |
| Rottweil R 902 | <<locked>> | 86% | 34,548 psi | 78% | 2100 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 94% | 34,925 psi | 79% | 2175 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 28,036 psi | 63% | 2021 fps | 95.3% |
| Shooters World Precision | <<locked>> | 86% | 32,387 psi | 73% | 2080 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 32,024 psi | 72% | 1998 fps | 97.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 25,904 psi | 59% | 1883 fps | 96.2% |
| Somchem S321 | <<locked>> | 80% | 34,287 psi | 78% | 2126 fps | 95.9% |
| Somchem S335 | <<locked>> | 80% | 31,343 psi | 71% | 2005 fps | 98% |
| Somchem S355 | <<locked>> | 94% | 36,637 psi | 83% | 2188 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 36,434 psi | 82% | 2080 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 31,821 psi | 72% | 2011 fps | 99.3% |
| Vihtavuori N135 | <<locked>> | 80% | 26,876 psi | 61% | 1975 fps | 98.5% |
| Vihtavuori N140 | <<locked>> | 80% | 28,166 psi | 64% | 1978 fps | 96.5% |
| Vihtavuori N150 | <<locked>> | 92% | 32,779 psi | 74% | 2093 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 82% | 34,287 psi | 78% | 2100 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 27,021 psi | 61% | 1965 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 30,850 psi | 70% | 2080 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 88% | 36,753 psi | 83% | 2192 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 47 powders for .33 Win. loaded with the .338 | 225gr | Speer Deep Curl Soft Point. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,303 fps; across all powders the maximum-charge window runs from 1,398 fps to 2,303 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 1:16.0 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, Accurate 4064, IMR 3031 rank at the top here: for .33 Win. with the .338 | 225gr | Speer Deep Curl Soft Point 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.