Load Specifications
Bullet:.338 | 250gr | Barnes LRX BT
Bullet Manufacturer:Barnes
Bullet Weight:250 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338 Win Mag. load data
Case Length (l3):2.5"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:86 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:11.0
Load data in caliber .338 Win Mag. with .338 | 250gr | Barnes LRX BT bullet and 104 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, Hodgdon Superformance and Alliant Reloder-17.
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>> | 84% | 53,229 psi | 85% | 2356 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,795 psi | 88% | 2421 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,491 psi | 87% | 2415 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 53,171 psi | 85% | 2434 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,534 psi | 87% | 2428 fps | 97.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 38,218 psi | 61% | 2287 fps | 96.1% |
| Accurate 4064 | <<locked>> | 92% | 54,491 psi | 87% | 2457 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,230 psi | 87% | 2543 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 88% | 55,767 psi | 89% | 2493 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 53,461 psi | 86% | 2451 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,969 psi | 88% | 2451 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,463 psi | 89% | 2418 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,405 psi | 89% | 2605 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 53,055 psi | 85% | 2467 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,362 psi | 90% | 2395 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,722 psi | 86% | 2490 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,475 psi | 84% | 2546 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 96% | 53,461 psi | 86% | 2579 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,130 psi | 60% | 2320 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,191 psi | 66% | 2457 fps | 98.3% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,637 psi | 89% | 2513 fps | 99.9% |
| Bofors RP3 | <<locked>> | 92% | 53,243 psi | 85% | 2480 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 53,853 psi | 86% | 2461 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 53,214 psi | 85% | 2388 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,925 psi | 86% | 2477 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 56,231 psi | 90% | 2569 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 55,724 psi | 89% | 2438 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 56,420 psi | 90% | 2464 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,418 psi | 87% | 2493 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 98% | 53,737 psi | 86% | 2539 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 96% | 54,926 psi | 88% | 2510 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 88% | 56,347 psi | 90% | 2503 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,602 psi | 78% | 2434 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 55,434 psi | 89% | 2533 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 54,679 psi | 88% | 2579 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,331 psi | 57% | 1473 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,157 psi | 87% | 2461 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 56,362 psi | 90% | 2480 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 56,318 psi | 90% | 2480 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,304 psi | 90% | 2464 fps | 98.6% |
| IMR 4198 | <<locked>> | 82% | 56,434 psi | 90% | 2352 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,998 psi | 87% | 2484 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,985 psi | 90% | 2490 fps | 98.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,387 psi | 82% | 2487 fps | 99.8% |
| IMR 4895 | <<locked>> | 90% | 55,085 psi | 88% | 2513 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 54,969 psi | 88% | 2451 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,824 psi | 88% | 2434 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,143 psi | 88% | 2467 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,448 psi | 89% | 2428 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 55,811 psi | 89% | 2470 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,882 psi | 88% | 2480 fps | 99.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,550 psi | 89% | 2510 fps | 98.8% |
| Norma 201 | <<locked>> | 88% | 54,244 psi | 87% | 2441 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,955 psi | 88% | 2444 fps | 100% |
| Norma 203B | <<locked>> | 92% | 56,260 psi | 90% | 2520 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 54,534 psi | 87% | 2526 fps | 96.8% |
| Norma URPᴾ | <<locked>> | 100% | 53,388 psi | 86% | 2530 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 90% | 53,345 psi | 86% | 2503 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,330 psi | 84% | 2533 fps | 98.9% |
| Ramshot TAC | <<locked>> | 86% | 55,158 psi | 88% | 2474 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,447 psi | 87% | 2484 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,782 psi | 89% | 2454 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,752 psi | 57% | 1506 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,375 psi | 87% | 2428 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,056 psi | 88% | 2484 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,027 psi | 87% | 2546 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,287 psi | 85% | 2575 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,838 psi | 86% | 2562 fps | 99.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,041 psi | 87% | 2595 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 86% | 55,114 psi | 88% | 2418 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,665 psi | 88% | 2438 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 53,113 psi | 85% | 2474 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 53,853 psi | 86% | 2461 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,882 psi | 88% | 2480 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,143 psi | 88% | 2467 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,811 psi | 89% | 2470 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,550 psi | 89% | 2510 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,143 psi | 88% | 2530 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,345 psi | 86% | 2451 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,041 psi | 87% | 2470 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 56,333 psi | 90% | 2388 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 56,188 psi | 90% | 2385 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,274 psi | 89% | 2438 fps | 98.5% |
| Somchem S321 | <<locked>> | 84% | 55,883 psi | 90% | 2477 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,303 psi | 89% | 2385 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 52,837 psi | 85% | 2441 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 53,708 psi | 86% | 2474 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,906 psi | 77% | 2487 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 44,556 psi | 71% | 2382 fps | 96% |
| Vihtavuori N130 | <<locked>> | 84% | 55,854 psi | 90% | 2349 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 53,127 psi | 85% | 2333 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,476 psi | 87% | 2405 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,477 psi | 89% | 2425 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,100 psi | 88% | 2451 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 56,246 psi | 90% | 2530 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 86% | 55,288 psi | 89% | 2448 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 53,548 psi | 86% | 2425 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,984 psi | 88% | 2533 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,248 psi | 65% | 2382 fps | 98.9% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 52,939 psi | 85% | 2467 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 55,143 psi | 88% | 2490 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 54,027 psi | 87% | 2546 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,982 psi | 53% | 2316 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,911 psi | 86% | 2480 fps | 100% |
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% | 47,050 psi | 75% | 2277 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,169 psi | 82% | 2375 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,073 psi | 63% | 2208 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,296 psi | 74% | 2346 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 44,802 psi | 72% | 2287 fps | 95.7% |
| Accurate 3100 | <<locked>> | 98% | 35,636 psi | 57% | 2238 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 37,014 psi | 59% | 2208 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 30,893 psi | 50% | 2149 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 43,308 psi | 69% | 2313 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 36,912 psi | 59% | 2185 fps | 97.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,411 psi | 73% | 2320 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 45,571 psi | 73% | 2300 fps | 100% |
| Alliant Power Pro 2000-MR | 52.1 gr | 80% | 39,233 psi | 63% | 2343 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,245 psi | 58% | 2205 fps | 99.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,881 psi | 85% | 2352 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,986 psi | 63% | 2257 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 84% | 31,923 psi | 51% | 2165 fps | 95.9% |
| Alliant Reloder-17 | 51.3 gr | 80% | 31,154 psi | 50% | 2178 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 90% | 27,224 psi | 44% | 2083 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 94% | 33,228 psi | 53% | 2283 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,380 psi | 68% | 2320 fps | 98.8% |
| Bofors RP3 | <<locked>> | 80% | 35,549 psi | 57% | 2201 fps | 99% |
| Bofors RP7 | <<locked>> | 88% | 41,887 psi | 67% | 2274 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,108 psi | 76% | 2303 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,005 psi | 71% | 2339 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,733 psi | 78% | 2467 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 80% | 51,982 psi | 83% | 2395 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,750 psi | 85% | 2418 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,477 psi | 58% | 2208 fps | 96.8% |
| Hodgdon H414 | <<locked>> | 88% | 38,638 psi | 62% | 2297 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 90% | 45,310 psi | 73% | 2365 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 43,671 psi | 70% | 2323 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 27,311 psi | 44% | 2031 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,668 psi | 64% | 2303 fps | 99.6% |
| Hodgdon Superformance | 61 gr | 90% | 41,118 psi | 66% | 2362 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,281 psi | 42% | 1312 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,930 psi | 67% | 2280 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 43,192 psi | 69% | 2310 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,711 psi | 62% | 2215 fps | 98.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,205 psi | 66% | 2234 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 53,229 psi | 85% | 2316 fps | 100% |
| IMR 4350 | <<locked>> | 92% | 41,930 psi | 67% | 2300 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 41,060 psi | 66% | 2257 fps | 95.5% |
| IMR 4831 | <<locked>> | 84% | 30,240 psi | 48% | 2116 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 39,943 psi | 64% | 2283 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 45,411 psi | 73% | 2320 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 50,966 psi | 82% | 2385 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,148 psi | 68% | 2293 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,613 psi | 70% | 2260 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 38,479 psi | 62% | 2218 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 35,534 psi | 57% | 2165 fps | 95.5% |
| Lovex S070 | <<locked>> | 88% | 38,174 psi | 61% | 2238 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 42,192 psi | 68% | 2267 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 42,641 psi | 68% | 2277 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,377 psi | 62% | 2247 fps | 98.9% |
| Norma 204 | <<locked>> | 96% | 47,703 psi | 76% | 2428 fps | 95.3% |
| Norma URP | <<locked>> | 84% | 31,734 psi | 51% | 2159 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 37,855 psi | 61% | 2260 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 37,768 psi | 61% | 2287 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 45,179 psi | 72% | 2329 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,585 psi | 71% | 2343 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,008 psi | 79% | 2362 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,542 psi | 43% | 1345 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,821 psi | 81% | 2385 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 37,217 psi | 60% | 2198 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,930 psi | 66% | 2349 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,257 psi | 53% | 2238 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 30,937 psi | 50% | 2165 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 33,562 psi | 54% | 2224 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 45,963 psi | 74% | 2297 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,103 psi | 64% | 2224 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 33,562 psi | 54% | 2159 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 41,887 psi | 67% | 2274 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 35,534 psi | 57% | 2165 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,148 psi | 68% | 2293 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,479 psi | 62% | 2218 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 38,174 psi | 61% | 2238 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,664 psi | 56% | 2205 fps | 97.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,236 psi | 69% | 2303 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,814 psi | 67% | 2290 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,787 psi | 70% | 2224 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,274 psi | 58% | 2113 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 39,740 psi | 64% | 2208 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 48,892 psi | 78% | 2388 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,265 psi | 69% | 2224 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,149 psi | 69% | 2303 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 34,403 psi | 55% | 2162 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 24,758 psi | 40% | 2014 fps | 96% |
| Somchem S385 | <<locked>> | 98% | 41,553 psi | 67% | 2333 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 49,516 psi | 79% | 2274 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,164 psi | 71% | 2218 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,639 psi | 64% | 2208 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,451 psi | 65% | 2221 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,822 psi | 53% | 2110 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 31,067 psi | 50% | 2110 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 45,382 psi | 73% | 2313 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 38,638 psi | 62% | 2211 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 32,430 psi | 52% | 2159 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 90% | 28,921 psi | 46% | 2146 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,022 psi | 47% | 2047 fps | 96.6% |
| Winchester 748 | <<locked>> | 80% | 45,034 psi | 72% | 2356 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 38,638 psi | 62% | 2297 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 94% | 27,151 psi | 44% | 2146 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,031 psi | 66% | 2290 fps | 99.6% |
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 104 powders for .338 Win Mag. loaded with the .338 | 250gr | Barnes LRX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,605 fps; across all powders the maximum-charge window runs from 1,473 fps to 2,605 fps. Accurate 3100 gives the best case fill at 100 %, and 104 of the 104 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .338 Win Mag. with the .338 | 250gr | Barnes LRX BT 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.