Load Specifications
Load data in caliber .338 Federal with .338 | 275gr | Speer SSP bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 and Hodgdon CFE223.
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>> | 92% | 51,300 psi | 85% | 2041 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 52,388 psi | 87% | 2113 fps | 98.8% |
| Accurate 2230 | <<locked>> | 84% | 52,779 psi | 88% | 2123 fps | 99.1% |
| Accurate 2460 | <<locked>> | 90% | 52,939 psi | 88% | 2096 fps | 100% |
| Accurate 2495ᴾ | <<locked>> | 100% | 53,621 psi | 89% | 2119 fps | 100% |
| Accurate 2520 | <<locked>> | 94% | 53,867 psi | 89% | 2142 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 49,719 psi | 83% | 2113 fps | 100% |
| Accurate LT-30 | <<locked>> | 86% | 52,823 psi | 88% | 2005 fps | 100% |
| Accurate LT-32 | <<locked>> | 86% | 53,301 psi | 89% | 2021 fps | 100% |
| ADI AR 2206H | <<locked>> | 96% | 53,606 psi | 89% | 2149 fps | 99.4% |
| ADI AR 2207 | <<locked>> | 84% | 54,056 psi | 90% | 2018 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 51,082 psi | 85% | 2100 fps | 98.7% |
| ADI AR 2219 | <<locked>> | 86% | 51,982 psi | 86% | 2096 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 94% | 52,953 psi | 88% | 2110 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 94% | 51,503 psi | 86% | 2096 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 90% | 54,215 psi | 90% | 2188 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 52,953 psi | 88% | 2228 fps | 98.8% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 49,313 psi | 82% | 2116 fps | 99.5% |
| Alliant Reloder-10x | <<locked>> | 88% | 51,837 psi | 86% | 2051 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 53,911 psi | 90% | 2172 fps | 99.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 43,961 psi | 73% | 2113 fps | 98.5% |
| Alliant Reloder-7 | <<locked>> | 82% | 51,851 psi | 86% | 2001 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 51,590 psi | 86% | 2011 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 96% | 52,779 psi | 88% | 2156 fps | 98.6% |
| Bofors RP3ᴾ | <<locked>> | 100% | 49,066 psi | 82% | 2126 fps | 99.6% |
| Hodgdon Benchmark | <<locked>> | 92% | 52,779 psi | 88% | 2070 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 94% | 50,865 psi | 85% | 2139 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 92% | 52,968 psi | 88% | 2208 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 90% | 54,085 psi | 90% | 2116 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 51,677 psi | 86% | 2106 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 51,488 psi | 86% | 2136 fps | 97.9% |
| Hodgdon H4198 | <<locked>> | 82% | 51,924 psi | 86% | 2005 fps | 100% |
| Hodgdon H4895 | <<locked>> | 96% | 53,954 psi | 90% | 2156 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 35,041 psi | 58% | 1916 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 51,532 psi | 86% | 2172 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,765 psi | 56% | 1217 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 52,040 psi | 86% | 2116 fps | 99.5% |
| IMR 3031 | <<locked>> | 96% | 51,967 psi | 86% | 2139 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 53,824 psi | 89% | 2126 fps | 99.1% |
| IMR 4198 | <<locked>> | 88% | 52,663 psi | 87% | 2018 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 51,837 psi | 86% | 2159 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 94% | 52,953 psi | 88% | 2110 fps | 99.8% |
| Lovex D073.4 | <<locked>> | 84% | 53,272 psi | 89% | 2103 fps | 100% |
| Lovex D073.5 | <<locked>> | 90% | 53,185 psi | 88% | 2110 fps | 100% |
| Lovex D073.6 | <<locked>> | 96% | 51,343 psi | 85% | 2126 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 51,387 psi | 85% | 2057 fps | 99.1% |
| Lovex S062ᴾ | <<locked>> | 100% | 52,794 psi | 88% | 2126 fps | 99.9% |
| Norma 200 | <<locked>> | 84% | 52,025 psi | 86% | 2031 fps | 100% |
| Norma 201 | <<locked>> | 96% | 52,127 psi | 87% | 2103 fps | 99.8% |
| Norma 202 | <<locked>> | 96% | 52,170 psi | 87% | 2110 fps | 100% |
| Norma 203Bᴾ | <<locked>> | 100% | 52,881 psi | 88% | 2162 fps | 99.4% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 53,142 psi | 88% | 2182 fps | 99.3% |
| Ramshot TAC | <<locked>> | 94% | 53,809 psi | 89% | 2126 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 94% | 52,518 psi | 87% | 2142 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 90% | 51,648 psi | 86% | 2083 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,069 psi | 57% | 1250 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 53,084 psi | 88% | 2106 fps | 100% |
| ReloadSwiss RS 50ᴾ | <<locked>> | 100% | 52,431 psi | 87% | 2116 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 98% | 53,301 psi | 89% | 2221 fps | 99.2% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 46,978 psi | 78% | 2165 fps | 100% |
| Rottweil R 901 | <<locked>> | 94% | 53,272 psi | 89% | 2090 fps | 100% |
| Rottweil R 902 | <<locked>> | 98% | 52,243 psi | 87% | 2096 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 45,513 psi | 76% | 2073 fps | 99% |
| Shooters World AR Plus | <<locked>> | 84% | 53,272 psi | 89% | 2103 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 96% | 51,343 psi | 85% | 2126 fps | 100% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 52,794 psi | 88% | 2126 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 53,432 psi | 89% | 2083 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 54,288 psi | 90% | 1818 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 52,518 psi | 87% | 2106 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 47,935 psi | 80% | 2123 fps | 98.7% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 52,895 psi | 88% | 2064 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 51,256 psi | 85% | 2103 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 51,605 psi | 86% | 2123 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 52,011 psi | 86% | 2031 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 50,778 psi | 84% | 2028 fps | 100% |
| Somchem S321 | <<locked>> | 92% | 54,360 psi | 90% | 2149 fps | 100% |
| Somchem S335 | <<locked>> | 96% | 53,563 psi | 89% | 2064 fps | 100% |
| Somchem S341 | <<locked>> | 96% | 54,114 psi | 90% | 2139 fps | 99.3% |
| Somchem S355ᴾ | <<locked>> | 100% | 46,934 psi | 78% | 2080 fps | 99.1% |
| Somchem S365ᴾ | <<locked>> | 100% | 33,707 psi | 56% | 1949 fps | 97.4% |
| Vihtavuori N120 | <<locked>> | 84% | 54,012 psi | 90% | 1978 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 51,837 psi | 86% | 2011 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 51,619 psi | 86% | 2024 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 54,027 psi | 90% | 2110 fps | 100% |
| Vihtavuori N140 | <<locked>> | 98% | 52,533 psi | 87% | 2093 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 45,049 psi | 75% | 2031 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 94% | 53,867 psi | 89% | 2116 fps | 99.9% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 54,244 psi | 90% | 2133 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 41,698 psi | 69% | 1988 fps | 97.9% |
| Winchester 748 | <<locked>> | 94% | 51,866 psi | 86% | 2149 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 98% | 54,288 psi | 90% | 2169 fps | 99.7% |
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% | 35,708 psi | 59% | 1844 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 46,151 psi | 77% | 2031 fps | 97.8% |
| Accurate 2230 | <<locked>> | 80% | 46,064 psi | 77% | 2037 fps | 98.2% |
| Accurate 2460 | <<locked>> | 80% | 38,247 psi | 64% | 1913 fps | 99.6% |
| Accurate 2495 | <<locked>> | 80% | 28,079 psi | 47% | 1775 fps | 99.8% |
| Accurate 2520 | <<locked>> | 80% | 33,518 psi | 56% | 1873 fps | 98.7% |
| Accurate 4064 | <<locked>> | 80% | 26,629 psi | 44% | 1759 fps | 97.8% |
| Accurate LT-30 | <<locked>> | 80% | 44,324 psi | 74% | 1906 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 44,701 psi | 74% | 1919 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 32,721 psi | 54% | 1841 fps | 95.3% |
| ADI AR 2207 | <<locked>> | 80% | 47,993 psi | 80% | 1955 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 35,766 psi | 59% | 1880 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 42,598 psi | 71% | 1985 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 34,606 psi | 57% | 1854 fps | 97.2% |
| Alliant AR-Comp | <<locked>> | 80% | 32,706 psi | 54% | 1860 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 39,421 psi | 65% | 1991 fps | 98% |
| Alliant Power Pro 2000-MR | 37.9 gr | 88% | 37,927 psi | 63% | 2001 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 29,950 psi | 50% | 1818 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 40,886 psi | 68% | 1919 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 34,795 psi | 58% | 1903 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 92% | 34,055 psi | 57% | 1942 fps | 95.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 48,791 psi | 81% | 1965 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 42,467 psi | 71% | 1906 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 38,363 psi | 64% | 1955 fps | 95.7% |
| Bofors RP3 | <<locked>> | 84% | 29,095 psi | 48% | 1818 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,927 psi | 61% | 1857 fps | 98.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 31,952 psi | 53% | 1860 fps | 97.2% |
| Hodgdon CFE223 | 35.3 gr | 80% | 35,389 psi | 59% | 1949 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 80% | 38,986 psi | 65% | 1932 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 39,508 psi | 66% | 1952 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 92% | 39,436 psi | 66% | 1972 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 80% | 48,776 psi | 81% | 1972 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 32,837 psi | 55% | 1850 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 32,982 psi | 55% | 1877 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 31,154 psi | 52% | 1857 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,106 psi | 42% | 1086 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 31,879 psi | 53% | 1818 fps | 95.5% |
| IMR 3031 | <<locked>> | 80% | 31,357 psi | 52% | 1857 fps | 99.8% |
| IMR 4064 | <<locked>> | 86% | 35,201 psi | 58% | 1867 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 41,785 psi | 69% | 1893 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 33,388 psi | 55% | 1886 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 34,606 psi | 57% | 1854 fps | 97.2% |
| Lovex D073.4 | <<locked>> | 80% | 46,586 psi | 77% | 2028 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 37,855 psi | 63% | 1913 fps | 98.8% |
| Lovex D073.6 | <<locked>> | 80% | 30,356 psi | 50% | 1824 fps | 97.9% |
| Lovex S060 | <<locked>> | 80% | 34,026 psi | 57% | 1804 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 28,718 psi | 48% | 1762 fps | 95.4% |
| Norma 200 | <<locked>> | 80% | 46,006 psi | 76% | 1965 fps | 100% |
| Norma 201 | <<locked>> | 80% | 32,126 psi | 53% | 1811 fps | 96.6% |
| Norma 202 | <<locked>> | 80% | 31,966 psi | 53% | 1827 fps | 98.8% |
| Norma 203B | <<locked>> | 84% | 32,024 psi | 53% | 1854 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 86% | 33,982 psi | 56% | 1900 fps | 95.2% |
| Ramshot TAC | <<locked>> | 88% | 44,454 psi | 74% | 2005 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 33,112 psi | 55% | 1860 fps | 95.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 37,666 psi | 63% | 1890 fps | 96.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,179 psi | 42% | 1112 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 38,769 psi | 64% | 1919 fps | 99.2% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 49,356 psi | 82% | 2080 fps | 95.7% |
| ReloadSwiss RS 52 | 35.9 gr | 86% | 35,737 psi | 59% | 1965 fps | 95.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 28,326 psi | 47% | 1827 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 35,708 psi | 59% | 1854 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 80% | 30,458 psi | 51% | 1775 fps | 96% |
| Rottweil R 903 | <<locked>> | 88% | 30,937 psi | 51% | 1847 fps | 95.6% |
| Shooters World AR Plus | <<locked>> | 80% | 46,586 psi | 77% | 2028 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 30,356 psi | 50% | 1824 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 28,718 psi | 48% | 1762 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 41,046 psi | 68% | 1929 fps | 98.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 49,110 psi | 82% | 1768 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 43,134 psi | 72% | 1995 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 33,083 psi | 55% | 1890 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 41,263 psi | 69% | 1926 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 41,887 psi | 70% | 1978 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 33,330 psi | 55% | 1857 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,910 psi | 56% | 1791 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 27,485 psi | 46% | 1693 fps | 98.4% |
| Somchem S321 | <<locked>> | 80% | 36,361 psi | 60% | 1909 fps | 98% |
| Somchem S335 | <<locked>> | 80% | 33,373 psi | 55% | 1798 fps | 99.4% |
| Somchem S341 | <<locked>> | 82% | 33,982 psi | 56% | 1864 fps | 95.5% |
| Somchem S355 | <<locked>> | 86% | 30,647 psi | 51% | 1824 fps | 95.2% |
| Somchem S365 | <<locked>> | 96% | 29,747 psi | 49% | 1867 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 48,022 psi | 80% | 1919 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 38,595 psi | 64% | 1850 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 33,823 psi | 56% | 1795 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 28,877 psi | 48% | 1775 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 80% | 29,979 psi | 50% | 1778 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 84% | 27,224 psi | 45% | 1739 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 34,142 psi | 57% | 1847 fps | 97.2% |
| Vihtavuori N540 | <<locked>> | 80% | 28,790 psi | 48% | 1772 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 34,243 psi | 57% | 1867 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 32,895 psi | 55% | 1877 fps | 97.7% |
| Winchester StaBALL Match | <<locked>> | 82% | 32,300 psi | 54% | 1854 fps | 95.8% |
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 91 powders for .338 Federal loaded with the .338 | 275gr | Speer SSP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,228 fps; across all powders the maximum-charge window runs from 1,217 fps to 2,228 fps. Accurate 2495 gives the best case fill at 100 %, and 91 of the 91 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 275.0 gr projectile in 0.338" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, ADI AR 2208 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 52, Hodgdon CFE223 rank at the top here: for .338 Federal with the .338 | 275gr | Speer SSP they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss, ReloadSwiss RS 14 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.