Load Specifications
Load data in caliber .33 Win. with .338 | 225gr | Speer Grand Slam 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, Lovex D073.6 and Shooters World Match Rifle.
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% | 39,494 psi | 89% | 2185 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 39,958 psi | 90% | 2221 fps | 99.2% |
| Accurate 2495 | <<locked>> | 90% | 37,710 psi | 85% | 2221 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 37,681 psi | 85% | 2221 fps | 98.6% |
| Accurate 4064 | <<locked>> | 92% | 37,942 psi | 86% | 2247 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 38,638 psi | 87% | 2224 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 38,348 psi | 87% | 2195 fps | 97.1% |
| Alliant AR-Comp | <<locked>> | 86% | 38,754 psi | 88% | 2244 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 39,987 psi | 90% | 2277 fps | 97.3% |
| Bofors RP3 | <<locked>> | 94% | 39,610 psi | 90% | 2283 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 38,537 psi | 87% | 2156 fps | 97.7% |
| Hodgdon BL-C2 | <<locked>> | 86% | 38,159 psi | 86% | 2251 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 86% | 38,798 psi | 88% | 2234 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 39,392 psi | 89% | 2290 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,779 psi | 76% | 1421 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 37,521 psi | 85% | 2195 fps | 96% |
| IMR 3031 | <<locked>> | 88% | 39,494 psi | 89% | 2283 fps | 100% |
| IMR 4895 | <<locked>> | 90% | 39,595 psi | 90% | 2277 fps | 96.2% |
| IMR 8208 XBR | <<locked>> | 84% | 38,348 psi | 87% | 2195 fps | 97.1% |
| Lovex D073.5 | <<locked>> | 82% | 39,740 psi | 90% | 2221 fps | 98.3% |
| Lovex D073.6 | <<locked>> | 88% | 38,682 psi | 87% | 2251 fps | 98.8% |
| Lovex S062 | <<locked>> | 90% | 38,130 psi | 86% | 2208 fps | 97.2% |
| Norma 201 | <<locked>> | 86% | 37,782 psi | 85% | 2188 fps | 97% |
| Norma 202 | <<locked>> | 88% | 39,914 psi | 90% | 2244 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 39,639 psi | 90% | 2254 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,895 psi | 77% | 1453 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 37,855 psi | 86% | 2303 fps | 98.1% |
| Rottweil R 901 | <<locked>> | 84% | 39,117 psi | 88% | 2192 fps | 99.1% |
| Rottweil R 902 | <<locked>> | 88% | 38,029 psi | 86% | 2185 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 96% | 39,204 psi | 89% | 2267 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 88% | 38,682 psi | 87% | 2251 fps | 98.8% |
| Shooters World Precision | <<locked>> | 90% | 38,130 psi | 86% | 2208 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 39,508 psi | 89% | 2241 fps | 96% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 37,768 psi | 85% | 2126 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 38,870 psi | 88% | 2162 fps | 99.7% |
| Somchem S321 | <<locked>> | 82% | 38,159 psi | 86% | 2215 fps | 97.4% |
| Somchem S335 | <<locked>> | 86% | 39,189 psi | 89% | 2169 fps | 99.6% |
| Somchem S355 | <<locked>> | 94% | 38,290 psi | 87% | 2234 fps | 96.3% |
| Vihtavuori N133 | <<locked>> | 86% | 39,972 psi | 90% | 2169 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 38,885 psi | 88% | 2224 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 37,898 psi | 86% | 2192 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 96% | 38,957 psi | 88% | 2228 fps | 97.8% |
| Vihtavuori N530 | <<locked>> | 84% | 38,334 psi | 87% | 2192 fps | 97.2% |
| Vihtavuori N540 | <<locked>> | 90% | 38,754 psi | 88% | 2221 fps | 99.1% |
| Winchester 748 | <<locked>> | 86% | 39,276 psi | 89% | 2270 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 88% | 38,479 psi | 87% | 2241 fps | 96.4% |
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% | 34,925 psi | 79% | 2106 fps | 99.9% |
| Accurate 2460 | <<locked>> | 80% | 37,362 psi | 84% | 2178 fps | 98.8% |
| Accurate 2495 | <<locked>> | 80% | 27,282 psi | 62% | 2014 fps | 99% |
| Accurate 2520 | <<locked>> | 80% | 32,851 psi | 74% | 2129 fps | 97.4% |
| Accurate 4064 | <<locked>> | 80% | 25,889 psi | 59% | 1991 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 84% | 36,158 psi | 82% | 2175 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 33,808 psi | 76% | 2106 fps | 95.7% |
| Alliant AR-Comp | <<locked>> | 80% | 32,039 psi | 72% | 2126 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 33,185 psi | 75% | 2146 fps | 95.2% |
| Bofors RP3 | <<locked>> | 88% | 32,387 psi | 73% | 2146 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,332 psi | 82% | 2116 fps | 97.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 31,227 psi | 71% | 2110 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 82% | 34,229 psi | 77% | 2146 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 34,650 psi | 78% | 2195 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,019 psi | 57% | 1266 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 35,375 psi | 80% | 2152 fps | 95.3% |
| IMR 3031 | <<locked>> | 80% | 30,719 psi | 69% | 2113 fps | 99% |
| IMR 4895 | <<locked>> | 88% | 36,999 psi | 84% | 2228 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 33,808 psi | 76% | 2106 fps | 95.7% |
| Lovex D073.5 | <<locked>> | 80% | 37,144 psi | 84% | 2175 fps | 97.7% |
| Lovex D073.6 | 39.1 gr | 80% | 29,559 psi | 67% | 2070 fps | 96.3% |
| Lovex S062 | <<locked>> | 84% | 31,662 psi | 72% | 2080 fps | 95.1% |
| Norma 201 | <<locked>> | 82% | 33,359 psi | 75% | 2100 fps | 95.7% |
| Norma 202 | <<locked>> | 80% | 31,111 psi | 70% | 2073 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 37,159 psi | 84% | 2208 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,990 psi | 56% | 1296 fps | 100% |
| ReloadSwiss RS 60 | 43.8 gr | 88% | 31,531 psi | 71% | 2159 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 34,809 psi | 79% | 2110 fps | 98.2% |
| Rottweil R 902 | <<locked>> | 82% | 31,807 psi | 72% | 2060 fps | 95% |
| Rottweil R 903 | <<locked>> | 92% | 34,389 psi | 78% | 2178 fps | 95.4% |
| Shooters World Match Rifle | 39.1 gr | 80% | 29,559 psi | 67% | 2070 fps | 96.3% |
| Shooters World Precision | <<locked>> | 84% | 31,662 psi | 72% | 2080 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 37,057 psi | 84% | 2195 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,388 psi | 75% | 2044 fps | 98% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 27,050 psi | 61% | 1929 fps | 97.1% |
| Somchem S321 | <<locked>> | 80% | 35,766 psi | 81% | 2169 fps | 96.7% |
| Somchem S335 | <<locked>> | 80% | 32,648 psi | 74% | 2047 fps | 98.6% |
| Somchem S355 | <<locked>> | 92% | 36,056 psi | 82% | 2195 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 33,257 psi | 75% | 2054 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 80% | 28,239 psi | 64% | 2021 fps | 99.1% |
| Vihtavuori N140 | <<locked>> | 80% | 29,399 psi | 66% | 2021 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 88% | 30,371 psi | 69% | 2057 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 33,446 psi | 76% | 2100 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 28,268 psi | 64% | 2011 fps | 96.3% |
| Winchester 748 | <<locked>> | 80% | 32,198 psi | 73% | 2129 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 86% | 36,042 psi | 81% | 2195 fps | 95.7% |
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 | Speer Grand Slam. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,303 fps; across all powders the maximum-charge window runs from 1,421 fps to 2,303 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 76–90 %, leaving at least 10 % headroom. The 225.0 gr projectile in 0.338" calls for a 1:6.0 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, Lovex D073.6, Shooters World Match Rifle rank at the top here: for .33 Win. with the .338 | 225gr | Speer Grand Slam 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.