Load Specifications
Load data in caliber .33 Win. with .338 | 225gr | Barnes TSX FB bullet and 48 powders. The key underlying parameters are shown in the table above.
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>> | 88% | 38,189 psi | 86% | 2126 fps | 99.9% |
| Accurate 2460 | <<locked>> | 86% | 38,827 psi | 88% | 2162 fps | 98.4% |
| Accurate 2495 | <<locked>> | 96% | 37,652 psi | 85% | 2188 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 38,769 psi | 88% | 2198 fps | 98.1% |
| Accurate 4064ᴾ | <<locked>> | 100% | 39,987 psi | 90% | 2247 fps | 99.2% |
| ADI AR 2219 | <<locked>> | 82% | 38,609 psi | 87% | 2169 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 90% | 39,929 psi | 90% | 2175 fps | 96.5% |
| Alliant AR-Comp | <<locked>> | 92% | 40,030 psi | 90% | 2228 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 39,755 psi | 90% | 2241 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 38,421 psi | 87% | 2201 fps | 95.9% |
| Alliant Reloder-10x | <<locked>> | 84% | 38,856 psi | 88% | 2142 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 39,291 psi | 89% | 2093 fps | 99.5% |
| Bofors RP3ᴾ | <<locked>> | 100% | 40,016 psi | 90% | 2247 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 38,029 psi | 86% | 2100 fps | 96.6% |
| Hodgdon BL-C2 | <<locked>> | 92% | 39,523 psi | 89% | 2228 fps | 97.2% |
| Hodgdon H322 | <<locked>> | 84% | 37,724 psi | 85% | 2156 fps | 99.1% |
| Hodgdon H335 | <<locked>> | 84% | 37,927 psi | 86% | 2165 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,764 psi | 74% | 1362 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 38,130 psi | 86% | 2218 fps | 99.7% |
| IMR 4198 | <<locked>> | 82% | 38,392 psi | 87% | 2090 fps | 100% |
| IMR 8208 XBR | <<locked>> | 90% | 39,929 psi | 90% | 2175 fps | 96.5% |
| Lovex D073.5 | <<locked>> | 86% | 38,580 psi | 87% | 2159 fps | 97.2% |
| Lovex D073.6 | <<locked>> | 94% | 39,392 psi | 89% | 2221 fps | 98.2% |
| Lovex S062 | <<locked>> | 96% | 38,827 psi | 88% | 2178 fps | 96.4% |
| Norma 201 | <<locked>> | 92% | 38,696 psi | 87% | 2159 fps | 96.3% |
| Norma 202 | <<locked>> | 92% | 38,609 psi | 87% | 2178 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,460 psi | 73% | 1391 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 40,030 psi | 90% | 2175 fps | 98% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 39,682 psi | 90% | 2274 fps | 97.4% |
| Rottweil R 901 | <<locked>> | 90% | 39,958 psi | 90% | 2165 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 94% | 39,030 psi | 88% | 2159 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 94% | 39,392 psi | 89% | 2221 fps | 98.2% |
| Shooters World Precision | <<locked>> | 96% | 38,827 psi | 88% | 2178 fps | 96.4% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 39,914 psi | 90% | 2139 fps | 96% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 38,928 psi | 88% | 2172 fps | 98.5% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 39,813 psi | 90% | 2152 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 39,436 psi | 89% | 2106 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 38,043 psi | 86% | 2103 fps | 99.1% |
| Somchem S321 | <<locked>> | 88% | 39,943 psi | 90% | 2201 fps | 96.9% |
| Somchem S335 | <<locked>> | 90% | 38,072 psi | 86% | 2106 fps | 99% |
| Vihtavuori N130 | <<locked>> | 86% | 39,639 psi | 90% | 2106 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 39,073 psi | 88% | 2113 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 96% | 39,436 psi | 89% | 2198 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 39,088 psi | 88% | 2165 fps | 98.9% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 37,594 psi | 85% | 2156 fps | 96.5% |
| Vihtavuori N530 | <<locked>> | 90% | 39,856 psi | 90% | 2169 fps | 96.6% |
| Vihtavuori N540 | <<locked>> | 96% | 39,885 psi | 90% | 2198 fps | 98.7% |
| Winchester 748 | <<locked>> | 90% | 38,276 psi | 87% | 2201 fps | 97.1% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 29,646 psi | 67% | 1969 fps | 98.7% |
| Accurate 2460 | <<locked>> | 80% | 31,459 psi | 71% | 2028 fps | 96.5% |
| Accurate 2495 | <<locked>> | 80% | 21,741 psi | 49% | 1854 fps | 96.3% |
| Accurate 2520 | <<locked>> | 82% | 29,109 psi | 66% | 2014 fps | 95.2% |
| Accurate 4064 | <<locked>> | 86% | 25,396 psi | 57% | 1959 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 35,984 psi | 81% | 2123 fps | 98.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 35,157 psi | 79% | 2090 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 80% | 27,079 psi | 61% | 1982 fps | 99.7% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 37,304 psi | 84% | 2198 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 36,143 psi | 82% | 2162 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 34,200 psi | 77% | 2064 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 36,840 psi | 83% | 2054 fps | 99.2% |
| Bofors RP3 | <<locked>> | 98% | 37,217 psi | 84% | 2198 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 33,518 psi | 76% | 2014 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 88% | 34,490 psi | 78% | 2139 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 80% | 33,025 psi | 75% | 2067 fps | 98.2% |
| Hodgdon H335 | <<locked>> | 80% | 33,054 psi | 75% | 2073 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,931 psi | 54% | 1211 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 25,947 psi | 59% | 1959 fps | 96.5% |
| IMR 4198 | <<locked>> | 80% | 35,998 psi | 81% | 2051 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 35,157 psi | 79% | 2090 fps | 95.1% |
| Lovex D073.5 | <<locked>> | 80% | 31,285 psi | 71% | 2024 fps | 95% |
| Lovex D073.6 | <<locked>> | 86% | 29,791 psi | 67% | 2041 fps | 95.4% |
| Lovex S062 | <<locked>> | 92% | 34,360 psi | 78% | 2096 fps | 95% |
| Norma 201 | <<locked>> | 90% | 36,419 psi | 82% | 2119 fps | 95.7% |
| Norma 202 | <<locked>> | 82% | 28,036 psi | 63% | 1972 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,786 psi | 54% | 1240 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 32,822 psi | 74% | 2044 fps | 96% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 34,780 psi | 79% | 2172 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 29,457 psi | 67% | 1965 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 90% | 34,519 psi | 78% | 2077 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 86% | 29,791 psi | 67% | 2041 fps | 95.4% |
| Shooters World Precision | <<locked>> | 92% | 34,360 psi | 78% | 2096 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 37,246 psi | 84% | 2093 fps | 95.2% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 36,347 psi | 82% | 2126 fps | 98% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 34,983 psi | 79% | 2070 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 28,761 psi | 65% | 1906 fps | 95.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 26,295 psi | 59% | 1870 fps | 95.7% |
| Somchem S321 | <<locked>> | 84% | 34,882 psi | 79% | 2110 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 27,963 psi | 63% | 1913 fps | 96.3% |
| Vihtavuori N130 | <<locked>> | 80% | 32,866 psi | 74% | 1995 fps | 99.7% |
| Vihtavuori N133 | <<locked>> | 80% | 28,558 psi | 65% | 1919 fps | 98.2% |
| Vihtavuori N135 | <<locked>> | 80% | 23,598 psi | 53% | 1877 fps | 96.7% |
| Vihtavuori N140 | <<locked>> | 82% | 26,701 psi | 60% | 1919 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 96% | 32,967 psi | 75% | 2067 fps | 95% |
| Vihtavuori N530 | <<locked>> | 86% | 34,882 psi | 79% | 2083 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 86% | 28,892 psi | 65% | 1988 fps | 95.5% |
| Winchester 748 | <<locked>> | 86% | 33,446 psi | 76% | 2110 fps | 95.5% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 48 powders for .33 Win. loaded with the .338 | 225gr | Barnes TSX FB. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,274 fps; across all powders the maximum-charge window runs from 1,362 fps to 2,274 fps. Accurate 4064 gives the best case fill at 100 %, and 48 of the 48 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 73–90 %, leaving at least 10 % headroom. The 225.0 gr projectile in 0.338" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 4064, Bofors RP3, Hodgdon TrailBoss 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.