Load Specifications
Load data in caliber .33 Win. with .338 | 225gr | Swift A-Frame 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 38,087 psi | 86% | 2149 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 38,450 psi | 87% | 2182 fps | 98.8% |
| Accurate 2495 | <<locked>> | 92% | 38,580 psi | 87% | 2221 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 38,580 psi | 87% | 2221 fps | 98.6% |
| Accurate 4064 | <<locked>> | 94% | 38,537 psi | 87% | 2244 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 86% | 39,247 psi | 89% | 2195 fps | 97% |
| Alliant AR-Comp | <<locked>> | 88% | 39,885 psi | 90% | 2247 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 39,378 psi | 89% | 2264 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 38,435 psi | 87% | 2231 fps | 96.6% |
| Bofors RP3 | <<locked>> | 94% | 37,724 psi | 85% | 2234 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 39,653 psi | 90% | 2159 fps | 97.6% |
| Hodgdon BL-C2 | <<locked>> | 88% | 39,233 psi | 89% | 2251 fps | 97.7% |
| Hodgdon H322 | <<locked>> | 82% | 39,421 psi | 89% | 2211 fps | 99.6% |
| Hodgdon H335 | <<locked>> | 82% | 39,900 psi | 90% | 2228 fps | 99.2% |
| Hodgdon H4895 | <<locked>> | 88% | 39,813 psi | 90% | 2234 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 37,826 psi | 86% | 2244 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,547 psi | 76% | 1401 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 38,493 psi | 87% | 2195 fps | 95.9% |
| IMR 3031 | <<locked>> | 88% | 37,884 psi | 86% | 2241 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 39,247 psi | 89% | 2195 fps | 97% |
| Lovex D073.5 | <<locked>> | 82% | 38,058 psi | 86% | 2178 fps | 97.7% |
| Lovex D073.6 | <<locked>> | 90% | 39,407 psi | 89% | 2247 fps | 98.7% |
| Lovex S062 | <<locked>> | 92% | 38,856 psi | 88% | 2205 fps | 97.1% |
| Norma 201 | <<locked>> | 88% | 38,653 psi | 87% | 2188 fps | 97% |
| Norma 202 | <<locked>> | 88% | 38,464 psi | 87% | 2201 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,663 psi | 76% | 1437 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 39,247 psi | 89% | 2192 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 39,059 psi | 88% | 2306 fps | 98.1% |
| Rottweil R 901 | <<locked>> | 84% | 37,782 psi | 85% | 2152 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 90% | 38,928 psi | 88% | 2185 fps | 97% |
| Rottweil R 903 | <<locked>> | 98% | 39,842 psi | 90% | 2264 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 90% | 39,407 psi | 89% | 2247 fps | 98.7% |
| Shooters World Precision | <<locked>> | 92% | 38,856 psi | 88% | 2205 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 38,653 psi | 87% | 2123 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 39,972 psi | 90% | 2165 fps | 99.7% |
| Somchem S321 | <<locked>> | 84% | 39,421 psi | 89% | 2221 fps | 97.4% |
| Somchem S335 | <<locked>> | 86% | 37,768 psi | 85% | 2129 fps | 99.3% |
| Somchem S355 | <<locked>> | 96% | 39,102 psi | 88% | 2234 fps | 96.2% |
| Vihtavuori N130 | <<locked>> | 82% | 38,957 psi | 88% | 2123 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 38,406 psi | 87% | 2129 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 39,450 psi | 89% | 2221 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 38,638 psi | 87% | 2188 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 98% | 39,711 psi | 90% | 2221 fps | 97.7% |
| Vihtavuori N530 | <<locked>> | 86% | 39,320 psi | 89% | 2192 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 92% | 39,639 psi | 90% | 2221 fps | 99% |
| Winchester 748 | <<locked>> | 86% | 37,739 psi | 85% | 2224 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 90% | 39,421 psi | 89% | 2241 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% | 33,518 psi | 76% | 2067 fps | 99.6% |
| Accurate 2460 | <<locked>> | 80% | 35,824 psi | 81% | 2136 fps | 98.3% |
| Accurate 2495 | <<locked>> | 80% | 25,976 psi | 59% | 1972 fps | 98.5% |
| Accurate 2520 | <<locked>> | 80% | 31,444 psi | 71% | 2087 fps | 96.7% |
| Accurate 4064 | 35.7 gr | 80% | 24,656 psi | 56% | 1949 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 34,693 psi | 78% | 2106 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 80% | 30,719 psi | 69% | 2083 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 36,898 psi | 83% | 2218 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 33,939 psi | 77% | 2146 fps | 95.1% |
| Bofors RP3 | <<locked>> | 92% | 35,099 psi | 79% | 2185 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 35,157 psi | 79% | 2077 fps | 96.4% |
| Hodgdon BL-C2 | <<locked>> | 82% | 32,126 psi | 73% | 2116 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 80% | 36,999 psi | 84% | 2169 fps | 99.3% |
| Hodgdon H335 | <<locked>> | 80% | 37,231 psi | 84% | 2182 fps | 98.7% |
| Hodgdon H4895 | <<locked>> | 84% | 34,940 psi | 79% | 2142 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 35,607 psi | 80% | 2198 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,787 psi | 56% | 1250 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 36,230 psi | 82% | 2152 fps | 95.2% |
| IMR 3031 | 35.3 gr | 80% | 29,457 psi | 67% | 2067 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 82% | 34,693 psi | 78% | 2106 fps | 95.6% |
| Lovex D073.5 | <<locked>> | 80% | 35,752 psi | 81% | 2136 fps | 97.1% |
| Lovex D073.6 | <<locked>> | 80% | 28,166 psi | 64% | 2024 fps | 95.4% |
| Lovex S062 | <<locked>> | 86% | 32,460 psi | 73% | 2083 fps | 95% |
| Norma 201 | <<locked>> | 84% | 34,171 psi | 77% | 2100 fps | 95.6% |
| Norma 202 | <<locked>> | 80% | 29,863 psi | 68% | 2031 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,729 psi | 56% | 1276 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,622 psi | 83% | 2146 fps | 97.7% |
| ReloadSwiss RS 60 | 43.1 gr | 90% | 32,285 psi | 73% | 2156 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 33,634 psi | 76% | 2073 fps | 97.7% |
| Rottweil R 902 | <<locked>> | 84% | 32,561 psi | 74% | 2060 fps | 95% |
| Rottweil R 903 | <<locked>> | 94% | 35,041 psi | 79% | 2175 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 28,166 psi | 64% | 2024 fps | 95.4% |
| Shooters World Precision | <<locked>> | 86% | 32,460 psi | 73% | 2083 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 32,111 psi | 73% | 2001 fps | 97.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 26,005 psi | 59% | 1886 fps | 96.3% |
| Somchem S321 | <<locked>> | 80% | 34,418 psi | 78% | 2129 fps | 96% |
| Somchem S335 | <<locked>> | 80% | 31,444 psi | 71% | 2008 fps | 98% |
| Somchem S355 | <<locked>> | 94% | 36,753 psi | 83% | 2192 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 36,564 psi | 83% | 2083 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 31,937 psi | 72% | 2011 fps | 99.3% |
| Vihtavuori N135 | <<locked>> | 80% | 26,992 psi | 61% | 1982 fps | 98.6% |
| Vihtavuori N140 | <<locked>> | 80% | 28,297 psi | 64% | 1982 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 92% | 32,880 psi | 74% | 2096 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 82% | 34,418 psi | 78% | 2103 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 27,108 psi | 61% | 1965 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 30,966 psi | 70% | 2083 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 88% | 36,854 psi | 83% | 2195 fps | 95.6% |
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 | Swift A-Frame. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,306 fps; across all powders the maximum-charge window runs from 1,401 fps to 2,306 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 76–90 %, leaving at least 10 % headroom. The 225.0 gr projectile in 0.338" calls for a 1:16.5 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 | Swift A-Frame 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.