Load Specifications
Load data in caliber .338 Federal with .338 | 225gr | Speer Grand Slam bullet and 87 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon CFE223, Alliant Power Pro 1200-R and Winchester 748.
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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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 1680 | <<locked>> | 82% | 51,953 psi | 86% | 2257 fps | 100% |
| Accurate 2015 | <<locked>> | 96% | 53,824 psi | 89% | 2352 fps | 100% |
| Accurate 2200 | <<locked>> | 86% | 52,286 psi | 87% | 2385 fps | 97.4% |
| Accurate 2230 | <<locked>> | 86% | 52,112 psi | 87% | 2388 fps | 97.7% |
| Accurate 2460 | <<locked>> | 92% | 52,330 psi | 87% | 2372 fps | 99.9% |
| Accurate 2495ᴾ | <<locked>> | 100% | 48,921 psi | 81% | 2356 fps | 100% |
| Accurate 2520 | <<locked>> | 96% | 53,069 psi | 88% | 2418 fps | 99.9% |
| Accurate 4064ᴾ | <<locked>> | 100% | 45,382 psi | 75% | 2339 fps | 99.9% |
| Accurate LT-30 | <<locked>> | 88% | 52,837 psi | 88% | 2277 fps | 100% |
| Accurate LT-32 | <<locked>> | 88% | 53,272 psi | 89% | 2293 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 98% | 52,562 psi | 87% | 2411 fps | 98.2% |
| ADI AR 2207 | <<locked>> | 86% | 53,592 psi | 89% | 2300 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 47,384 psi | 79% | 2316 fps | 96.5% |
| ADI AR 2219 | <<locked>> | 88% | 51,837 psi | 86% | 2379 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 96% | 52,388 psi | 87% | 2382 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 98% | 53,664 psi | 89% | 2415 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 92% | 53,592 psi | 89% | 2474 fps | 99% |
| Alliant Power Pro 2000-MRᴾ | <<locked>> | 100% | 52,533 psi | 87% | 2490 fps | 97.1% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 45,295 psi | 75% | 2333 fps | 97.9% |
| Alliant Reloder-10x | <<locked>> | 92% | 54,157 psi | 90% | 2362 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 49,472 psi | 82% | 2388 fps | 97.3% |
| Alliant Reloder-7 | <<locked>> | 84% | 51,764 psi | 86% | 2280 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 51,430 psi | 85% | 2280 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 98% | 52,359 psi | 87% | 2421 fps | 97.1% |
| Bofors RP3ᴾ | <<locked>> | 100% | 44,759 psi | 74% | 2339 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 94% | 52,301 psi | 87% | 2336 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 98% | 53,664 psi | 89% | 2451 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 94% | 52,098 psi | 87% | 2474 fps | 97.7% |
| Hodgdon H322 | <<locked>> | 92% | 53,272 psi | 89% | 2395 fps | 100% |
| Hodgdon H335 | <<locked>> | 90% | 50,894 psi | 85% | 2379 fps | 100% |
| Hodgdon H4198 | <<locked>> | 84% | 51,750 psi | 86% | 2277 fps | 100% |
| Hodgdon H4895 | <<locked>> | 98% | 52,837 psi | 88% | 2421 fps | 98.7% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 50,850 psi | 84% | 2441 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,446 psi | 56% | 1391 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 51,576 psi | 86% | 2385 fps | 98.5% |
| IMR 3031ᴾ | <<locked>> | 100% | 54,201 psi | 90% | 2457 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 49,806 psi | 83% | 2346 fps | 97.3% |
| IMR 4198 | <<locked>> | 90% | 52,286 psi | 87% | 2297 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 50,633 psi | 84% | 2421 fps | 98.1% |
| IMR 8208 XBR | <<locked>> | 96% | 52,388 psi | 87% | 2382 fps | 99.1% |
| Lovex D073.4 | <<locked>> | 86% | 52,808 psi | 88% | 2382 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 92% | 52,591 psi | 87% | 2379 fps | 99.6% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 53,940 psi | 90% | 2438 fps | 99.9% |
| Lovex S053 | <<locked>> | 82% | 53,679 psi | 89% | 2211 fps | 100% |
| Lovex S060 | <<locked>> | 98% | 53,969 psi | 90% | 2356 fps | 98.3% |
| Lovex S062ᴾ | <<locked>> | 100% | 48,573 psi | 81% | 2346 fps | 98.7% |
| Norma 200 | <<locked>> | 88% | 54,418 psi | 90% | 2343 fps | 100% |
| Norma 201 | <<locked>> | 98% | 51,459 psi | 85% | 2372 fps | 99.1% |
| Norma 202 | <<locked>> | 98% | 51,329 psi | 85% | 2382 fps | 100% |
| Norma 203Bᴾ | <<locked>> | 100% | 48,544 psi | 81% | 2382 fps | 97.7% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 49,385 psi | 82% | 2402 fps | 97.4% |
| Ramshot TAC | <<locked>> | 96% | 53,548 psi | 89% | 2388 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 96% | 51,706 psi | 86% | 2408 fps | 98% |
| Ramshot X-Terminator | <<locked>> | 92% | 51,111 psi | 85% | 2343 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,562 psi | 56% | 1424 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 52,895 psi | 88% | 2382 fps | 99.8% |
| ReloadSwiss RS 52ᴾ | <<locked>> | 100% | 52,170 psi | 87% | 2487 fps | 97.7% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 43,323 psi | 72% | 2369 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 96% | 52,692 psi | 88% | 2365 fps | 100% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 51,430 psi | 85% | 2362 fps | 99% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 41,466 psi | 69% | 2277 fps | 96.9% |
| Shooters World AR Plus | <<locked>> | 86% | 52,808 psi | 88% | 2382 fps | 99.8% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 53,940 psi | 90% | 2438 fps | 99.9% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 48,573 psi | 81% | 2346 fps | 98.7% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 53,417 psi | 89% | 2356 fps | 98.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 54,389 psi | 90% | 2083 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 52,185 psi | 87% | 2385 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 44,353 psi | 74% | 2333 fps | 96.4% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 52,243 psi | 87% | 2339 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 98% | 54,230 psi | 90% | 2405 fps | 96.4% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 54,389 psi | 90% | 2431 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 51,445 psi | 85% | 2297 fps | 99.9% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 46,978 psi | 78% | 2254 fps | 100% |
| Somchem S321 | <<locked>> | 94% | 53,853 psi | 89% | 2421 fps | 99.4% |
| Somchem S335 | <<locked>> | 98% | 53,055 psi | 88% | 2336 fps | 100% |
| Somchem S341 | <<locked>> | 98% | 53,606 psi | 89% | 2408 fps | 98.2% |
| Somchem S355ᴾ | <<locked>> | 100% | 43,221 psi | 72% | 2290 fps | 97% |
| Vihtavuori N120 | <<locked>> | 86% | 53,606 psi | 89% | 2257 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 51,416 psi | 85% | 2283 fps | 100% |
| Vihtavuori N133 | <<locked>> | 98% | 54,172 psi | 90% | 2329 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 49,501 psi | 82% | 2349 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 51,619 psi | 86% | 2362 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 41,336 psi | 69% | 2238 fps | 97.9% |
| Vihtavuori N530 | <<locked>> | 96% | 53,142 psi | 88% | 2385 fps | 99.2% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 49,995 psi | 83% | 2362 fps | 99.9% |
| Winchester 748 | <<locked>> | 96% | 51,300 psi | 85% | 2421 fps | 99.6% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 53,766 psi | 89% | 2441 fps | 98.8% |
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 1680 | <<locked>> | 80% | 48,457 psi | 81% | 2218 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 32,793 psi | 54% | 2044 fps | 99.5% |
| Accurate 2200 | <<locked>> | 80% | 42,772 psi | 71% | 2241 fps | 95.3% |
| Accurate 2230 | <<locked>> | 80% | 42,235 psi | 70% | 2244 fps | 95.6% |
| Accurate 2460 | <<locked>> | 80% | 35,230 psi | 59% | 2113 fps | 98% |
| Accurate 2495 | <<locked>> | 80% | 25,353 psi | 42% | 1949 fps | 98.1% |
| Accurate 2520 | <<locked>> | 80% | 30,618 psi | 51% | 2057 fps | 96.2% |
| Accurate 4064 | <<locked>> | 82% | 25,657 psi | 43% | 1965 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 41,669 psi | 69% | 2126 fps | 99.8% |
| Accurate LT-32 | <<locked>> | 80% | 42,047 psi | 70% | 2136 fps | 98.8% |
| ADI AR 2206H | <<locked>> | 88% | 38,783 psi | 64% | 2198 fps | 95.3% |
| ADI AR 2207 | <<locked>> | 80% | 44,773 psi | 74% | 2192 fps | 100% |
| ADI AR 2208 | <<locked>> | 96% | 42,148 psi | 70% | 2234 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 39,610 psi | 66% | 2205 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 34,156 psi | 57% | 2087 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 30,066 psi | 50% | 2060 fps | 100% |
| Alliant Power Pro 1200-R | 35.8 gr | 80% | 36,187 psi | 60% | 2192 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 45,701 psi | 76% | 2385 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 35,375 psi | 59% | 2165 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 37,826 psi | 63% | 2139 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 41,263 psi | 69% | 2264 fps | 95.4% |
| Alliant Reloder-7 | <<locked>> | 80% | 45,614 psi | 76% | 2201 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 39,827 psi | 66% | 2119 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 46,021 psi | 76% | 2329 fps | 95.7% |
| Bofors RP3 | <<locked>> | 92% | 34,345 psi | 57% | 2159 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 34,360 psi | 57% | 2047 fps | 96% |
| Hodgdon BL-C2 | <<locked>> | 82% | 31,372 psi | 52% | 2087 fps | 95% |
| Hodgdon CFE223 | 42.9 gr | 88% | 42,670 psi | 71% | 2329 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 80% | 36,042 psi | 60% | 2139 fps | 99.1% |
| Hodgdon H335 | <<locked>> | 80% | 36,419 psi | 61% | 2156 fps | 98.4% |
| Hodgdon H4198 | <<locked>> | 80% | 45,934 psi | 76% | 2201 fps | 99.9% |
| Hodgdon H4895 | <<locked>> | 86% | 36,579 psi | 61% | 2165 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 37,159 psi | 62% | 2215 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,801 psi | 41% | 1240 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 37,739 psi | 63% | 2169 fps | 95.5% |
| IMR 3031 | <<locked>> | 80% | 28,848 psi | 48% | 2044 fps | 98.1% |
| IMR 4064 | <<locked>> | 94% | 41,481 psi | 69% | 2218 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 39,117 psi | 65% | 2116 fps | 100% |
| IMR 4895 | <<locked>> | 92% | 39,595 psi | 66% | 2247 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 82% | 34,156 psi | 57% | 2087 fps | 95.2% |
| Lovex D073.4 | <<locked>> | 80% | 43,134 psi | 72% | 2247 fps | 99% |
| Lovex D073.5 | <<locked>> | 80% | 34,940 psi | 58% | 2110 fps | 96.7% |
| Lovex D073.6 | <<locked>> | 82% | 29,472 psi | 49% | 2044 fps | 95.7% |
| Lovex S053 | <<locked>> | 80% | 50,720 psi | 84% | 2178 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 40,350 psi | 67% | 2156 fps | 95.6% |
| Lovex S062 | <<locked>> | 88% | 33,750 psi | 56% | 2100 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 42,569 psi | 71% | 2192 fps | 100% |
| Norma 201 | <<locked>> | 84% | 33,576 psi | 56% | 2077 fps | 95.2% |
| Norma 202 | <<locked>> | 80% | 29,283 psi | 49% | 2008 fps | 96.4% |
| Norma 203B | <<locked>> | 92% | 37,971 psi | 63% | 2211 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 94% | 40,524 psi | 67% | 2260 fps | 95.2% |
| Ramshot TAC | <<locked>> | 94% | 50,053 psi | 83% | 2343 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 88% | 39,856 psi | 66% | 2228 fps | 95.4% |
| Ramshot X-Terminator | <<locked>> | 84% | 39,668 psi | 66% | 2169 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,743 psi | 41% | 1270 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,013 psi | 60% | 2123 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 42,714 psi | 71% | 2343 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 33,736 psi | 56% | 2175 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 32,996 psi | 55% | 2047 fps | 97.3% |
| Rottweil R 902 | <<locked>> | 86% | 33,837 psi | 56% | 2077 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 96% | 36,637 psi | 61% | 2195 fps | 95.6% |
| Shooters World AR Plus | <<locked>> | 80% | 43,134 psi | 72% | 2247 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 82% | 29,472 psi | 49% | 2044 fps | 95.7% |
| Shooters World Precision | <<locked>> | 88% | 33,750 psi | 56% | 2100 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 38,043 psi | 63% | 2126 fps | 96% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 46,572 psi | 77% | 1995 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 39,885 psi | 66% | 2205 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 41,727 psi | 69% | 2290 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,130 psi | 63% | 2139 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 47,355 psi | 79% | 2313 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 39,726 psi | 66% | 2215 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,517 psi | 52% | 1978 fps | 97% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 25,498 psi | 42% | 1864 fps | 95.8% |
| Somchem S321 | <<locked>> | 80% | 33,620 psi | 56% | 2100 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 30,879 psi | 51% | 1985 fps | 97.7% |
| Somchem S341 | <<locked>> | 90% | 40,901 psi | 68% | 2224 fps | 95.6% |
| Somchem S355 | <<locked>> | 96% | 38,101 psi | 63% | 2205 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 44,817 psi | 74% | 2152 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 35,868 psi | 60% | 2060 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 31,285 psi | 52% | 1988 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 80% | 26,339 psi | 44% | 1955 fps | 98.2% |
| Vihtavuori N140 | <<locked>> | 80% | 27,731 psi | 46% | 1959 fps | 96.1% |
| Vihtavuori N150 | <<locked>> | 92% | 32,227 psi | 54% | 2070 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 82% | 33,837 psi | 56% | 2080 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 82% | 28,326 psi | 47% | 1988 fps | 95.7% |
| Winchester 748 | 38.4 gr | 82% | 32,401 psi | 54% | 2103 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 36,216 psi | 60% | 2169 fps | 95.1% |
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 87 powders for .338 Federal loaded with the .338 | 225gr | Speer Grand Slam. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,490 fps; across all powders the maximum-charge window runs from 1,391 fps to 2,490 fps. Accurate 2495 gives the best case fill at 100 %, and 87 of the 87 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 225.0 gr projectile in 0.338" calls for a 1:6.0 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. Hodgdon CFE223, Alliant Power Pro 1200-R, Winchester 748 rank at the top here: for .338 Federal 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.