Load Specifications
Load data in caliber .33 Win. with .338 | 275gr | Swift A-Frame bullet and 61 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and Hodgdon LEVERevolution.
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>> | 82% | 39,044 psi | 88% | 1906 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 37,739 psi | 85% | 1946 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 38,159 psi | 86% | 1972 fps | 99.5% |
| Accurate 4064 | <<locked>> | 90% | 37,724 psi | 85% | 1972 fps | 99.9% |
| Accurate 4350ᴾ | <<locked>> | 100% | 37,681 psi | 85% | 2024 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 84% | 38,029 psi | 86% | 1949 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 90% | 38,943 psi | 88% | 1949 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 37,898 psi | 86% | 1923 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 84% | 38,638 psi | 87% | 1962 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 39,262 psi | 89% | 2044 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 39,697 psi | 90% | 2001 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 88% | 38,305 psi | 87% | 1975 fps | 96.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 39,769 psi | 90% | 2034 fps | 96.1% |
| Alliant Reloder-17 | <<locked>> | 96% | 39,784 psi | 90% | 2067 fps | 97.9% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 39,436 psi | 89% | 1991 fps | 96.3% |
| Bofors RP3 | <<locked>> | 92% | 39,204 psi | 89% | 2008 fps | 98.5% |
| Hodgdon BL-C2 | <<locked>> | 84% | 37,739 psi | 85% | 1975 fps | 98.8% |
| Hodgdon CFE223 | <<locked>> | 82% | 39,102 psi | 88% | 2028 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 38,203 psi | 86% | 1959 fps | 97.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 35,940 psi | 81% | 1949 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 38,682 psi | 87% | 2011 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,924 psi | 77% | 1230 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 39,320 psi | 89% | 1962 fps | 97.9% |
| IMR 3031 | <<locked>> | 86% | 39,073 psi | 88% | 1995 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 38,450 psi | 87% | 1936 fps | 96.8% |
| IMR 4895 | <<locked>> | 88% | 39,131 psi | 88% | 2001 fps | 97.7% |
| IMR 8208 XBR | <<locked>> | 82% | 37,898 psi | 86% | 1923 fps | 98.3% |
| Lovex D073.6 | <<locked>> | 86% | 38,159 psi | 86% | 1972 fps | 99.5% |
| Lovex S060 | <<locked>> | 84% | 39,392 psi | 89% | 1909 fps | 97.4% |
| Lovex S062 | <<locked>> | 88% | 37,826 psi | 86% | 1939 fps | 98.4% |
| Norma 201 | <<locked>> | 86% | 39,755 psi | 90% | 1955 fps | 98.7% |
| Norma 202 | <<locked>> | 86% | 39,682 psi | 90% | 1969 fps | 99.9% |
| Norma 203B | <<locked>> | 90% | 39,842 psi | 90% | 2005 fps | 97.7% |
| Norma URPᴾ | <<locked>> | 100% | 39,015 psi | 88% | 2024 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 90% | 39,798 psi | 90% | 2018 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 38,841 psi | 88% | 1975 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,229 psi | 77% | 1263 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 39,552 psi | 89% | 2047 fps | 97.1% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 39,842 psi | 90% | 2077 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 38,885 psi | 88% | 1919 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 86% | 37,753 psi | 85% | 1919 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 94% | 38,812 psi | 88% | 1995 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 86% | 38,159 psi | 86% | 1972 fps | 99.5% |
| Shooters World Precision | <<locked>> | 88% | 37,826 psi | 86% | 1939 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 38,522 psi | 87% | 2005 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 38,870 psi | 88% | 1965 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 39,407 psi | 89% | 1890 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 38,551 psi | 87% | 1893 fps | 100% |
| Somchem S335 | <<locked>> | 84% | 38,464 psi | 87% | 1893 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 37,565 psi | 85% | 1939 fps | 96.9% |
| Somchem S355 | <<locked>> | 92% | 37,884 psi | 86% | 1965 fps | 97.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 34,592 psi | 78% | 1985 fps | 98% |
| Vihtavuori N133 | <<locked>> | 84% | 39,276 psi | 89% | 1890 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 38,493 psi | 87% | 1942 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 39,842 psi | 90% | 1952 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 38,421 psi | 87% | 1952 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 82% | 37,478 psi | 85% | 1916 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 88% | 38,305 psi | 87% | 1949 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 39,958 psi | 90% | 1982 fps | 97.8% |
| Winchester 748 | <<locked>> | 84% | 38,508 psi | 87% | 1988 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 86% | 37,884 psi | 86% | 1969 fps | 97.8% |
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% | 36,695 psi | 83% | 1873 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 29,051 psi | 66% | 1804 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 33,185 psi | 75% | 1890 fps | 98.8% |
| Accurate 4064 | <<locked>> | 80% | 27,528 psi | 62% | 1788 fps | 98.3% |
| Accurate 4350 | <<locked>> | 98% | 35,012 psi | 79% | 1978 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 33,504 psi | 76% | 1870 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 86% | 34,592 psi | 78% | 1877 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 35,389 psi | 80% | 1883 fps | 97.7% |
| Alliant AR-Comp | <<locked>> | 80% | 33,939 psi | 77% | 1893 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 36,767 psi | 83% | 1998 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 29,080 psi | 66% | 1811 fps | 95.4% |
| Alliant Reloder-15 | <<locked>> | 84% | 33,678 psi | 76% | 1896 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 98% | 37,550 psi | 85% | 1995 fps | 95.3% |
| Alliant Reloder-17 | 39.3 gr | 90% | 32,764 psi | 74% | 1932 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 36,970 psi | 84% | 1949 fps | 95.6% |
| Bofors RP3 | <<locked>> | 82% | 28,007 psi | 63% | 1808 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 32,982 psi | 75% | 1893 fps | 97.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 36,332 psi | 82% | 1982 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 80% | 33,663 psi | 76% | 1880 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 31,966 psi | 72% | 1873 fps | 95.3% |
| Hodgdon LEVERevolution | 34.8 gr | 80% | 29,994 psi | 68% | 1847 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,164 psi | 57% | 1096 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 32,590 psi | 74% | 1847 fps | 96.1% |
| IMR 3031 | <<locked>> | 80% | 32,256 psi | 73% | 1886 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 34,055 psi | 77% | 1860 fps | 95.4% |
| IMR 4895 | <<locked>> | 82% | 32,401 psi | 73% | 1883 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 35,389 psi | 80% | 1883 fps | 97.7% |
| Lovex D073.6 | <<locked>> | 80% | 31,401 psi | 71% | 1857 fps | 98.4% |
| Lovex S060 | <<locked>> | 80% | 34,809 psi | 79% | 1834 fps | 96.2% |
| Lovex S062 | <<locked>> | 80% | 29,486 psi | 67% | 1791 fps | 96% |
| Norma 201 | <<locked>> | 80% | 32,967 psi | 75% | 1841 fps | 97.2% |
| Norma 202 | <<locked>> | 80% | 32,822 psi | 74% | 1857 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 31,082 psi | 70% | 1850 fps | 95.1% |
| Norma URP | <<locked>> | 98% | 36,796 psi | 83% | 1988 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 84% | 32,764 psi | 74% | 1893 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 34,055 psi | 77% | 1893 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,541 psi | 58% | 1129 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 34,534 psi | 78% | 1959 fps | 95.5% |
| ReloadSwiss RS 60 | 35.8 gr | 82% | 27,209 psi | 62% | 1814 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 36,622 psi | 83% | 1883 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 31,299 psi | 71% | 1804 fps | 96.6% |
| Rottweil R 903 | <<locked>> | 86% | 30,023 psi | 68% | 1841 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 31,401 psi | 71% | 1857 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 29,486 psi | 67% | 1791 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 34,098 psi | 77% | 1926 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 32,097 psi | 73% | 1847 fps | 95.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 34,780 psi | 79% | 1818 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,224 psi | 64% | 1722 fps | 98.8% |
| Somchem S335 | <<locked>> | 80% | 34,171 psi | 77% | 1824 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 32,866 psi | 74% | 1857 fps | 95.4% |
| Somchem S355 | <<locked>> | 84% | 29,573 psi | 67% | 1814 fps | 95% |
| Somchem S365 | <<locked>> | 94% | 29,066 psi | 66% | 1867 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 34,722 psi | 78% | 1824 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 29,820 psi | 67% | 1804 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 31,009 psi | 70% | 1808 fps | 99% |
| Vihtavuori N150 | <<locked>> | 82% | 26,455 psi | 60% | 1736 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 35,244 psi | 80% | 1880 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 80% | 29,718 psi | 67% | 1801 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 33,243 psi | 75% | 1867 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 33,866 psi | 77% | 1909 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 31,024 psi | 70% | 1844 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 61 powders for .33 Win. loaded with the .338 | 275gr | Swift A-Frame. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,077 fps; across all powders the maximum-charge window runs from 1,230 fps to 2,077 fps. Accurate 4350 gives the best case fill at 100 %, and 61 of the 61 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 77–90 %, leaving at least 10 % headroom. The 275.0 gr projectile in 0.338" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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, Alliant Reloder-17, Hodgdon LEVERevolution rank at the top here: for .33 Win. with the .338 | 275gr | Swift A-Frame they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.