Load Specifications
Bullet Manufacturer:Barnes
Bullet Weight:265 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:1:10.5
Load data in caliber .338 Win Mag. with .338 | 265gr | Barnes TAC-TX BT bullet and 106 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% | 54,911 psi | 88% | 2293 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 52,808 psi | 85% | 2316 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,071 psi | 88% | 2379 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,101 psi | 90% | 2375 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 40,016 psi | 64% | 2247 fps | 97.2% |
| Accurate 4064 | <<locked>> | 92% | 56,260 psi | 90% | 2398 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 52,779 psi | 85% | 2444 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 53,751 psi | 86% | 2388 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 54,868 psi | 88% | 2392 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 48,196 psi | 77% | 2379 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,275 psi | 90% | 2388 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,853 psi | 86% | 2320 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,432 psi | 86% | 2500 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 47,950 psi | 77% | 2379 fps | 96.3% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 47,950 psi | 77% | 2379 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,679 psi | 88% | 2408 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,274 psi | 89% | 2428 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,317 psi | 87% | 2493 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,608 psi | 89% | 2523 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 47,239 psi | 76% | 2375 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,363 psi | 62% | 2274 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,888 psi | 69% | 2418 fps | 99.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,650 psi | 86% | 2411 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 55,071 psi | 88% | 2421 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,463 psi | 89% | 2405 fps | 98.6% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,839 psi | 88% | 2329 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,608 psi | 89% | 2418 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,157 psi | 87% | 2461 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 56,188 psi | 90% | 2438 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 98% | 55,840 psi | 90% | 2493 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 94% | 53,272 psi | 85% | 2415 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 86% | 54,302 psi | 87% | 2398 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,488 psi | 81% | 2382 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 53,766 psi | 86% | 2431 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 56,434 psi | 90% | 2530 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,389 psi | 57% | 1424 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,825 psi | 90% | 2402 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,491 psi | 87% | 2375 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,549 psi | 87% | 2379 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,520 psi | 87% | 2365 fps | 98.8% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,593 psi | 89% | 2431 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,157 psi | 87% | 2392 fps | 98.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,403 psi | 86% | 2438 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 53,214 psi | 85% | 2411 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 56,275 psi | 90% | 2388 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 56,318 psi | 90% | 2372 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,330 psi | 86% | 2369 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,505 psi | 86% | 2326 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,143 psi | 87% | 2372 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,200 psi | 85% | 2382 fps | 99.5% |
| Lovex S070 | <<locked>> | 98% | 53,940 psi | 86% | 2415 fps | 99% |
| Norma 201 | <<locked>> | 88% | 55,883 psi | 90% | 2382 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,156 psi | 85% | 2343 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,447 psi | 87% | 2418 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 56,362 psi | 90% | 2477 fps | 97.7% |
| Norma MRPᴾ | <<locked>> | 100% | 43,004 psi | 69% | 2382 fps | 96.8% |
| Norma URPᴾ | <<locked>> | 100% | 55,477 psi | 89% | 2477 fps | 100% |
| Ramshot Big Game | <<locked>> | 90% | 55,216 psi | 89% | 2448 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,230 psi | 87% | 2480 fps | 99.5% |
| Ramshot TAC | <<locked>> | 84% | 53,084 psi | 85% | 2372 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,333 psi | 90% | 2428 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,824 psi | 86% | 2352 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,853 psi | 57% | 1457 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,840 psi | 90% | 2369 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,055 psi | 85% | 2382 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,130 psi | 90% | 2490 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,274 psi | 89% | 2520 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 56,028 psi | 90% | 2510 fps | 100% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,941 psi | 90% | 2543 fps | 100% |
| Rottweil R 901 | <<locked>> | 84% | 53,403 psi | 86% | 2320 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,347 psi | 90% | 2379 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 54,955 psi | 88% | 2415 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 45,643 psi | 73% | 2356 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 96% | 55,463 psi | 89% | 2405 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,200 psi | 85% | 2382 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,330 psi | 86% | 2369 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,143 psi | 87% | 2372 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 53,940 psi | 86% | 2415 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,548 psi | 86% | 2431 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,926 psi | 88% | 2395 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,840 psi | 90% | 2415 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,172 psi | 87% | 2283 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,288 psi | 87% | 2287 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,490 psi | 86% | 2343 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 45,266 psi | 73% | 2349 fps | 95.9% |
| Somchem S321 | <<locked>> | 82% | 53,940 psi | 86% | 2375 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,461 psi | 86% | 2283 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,708 psi | 88% | 2388 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 55,376 psi | 89% | 2415 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,734 psi | 80% | 2431 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 46,195 psi | 74% | 2339 fps | 97.1% |
| Vihtavuori N130 | <<locked>> | 82% | 54,201 psi | 87% | 2251 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,476 psi | 87% | 2270 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,231 psi | 90% | 2343 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,795 psi | 86% | 2326 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 53,345 psi | 86% | 2352 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,708 psi | 88% | 2431 fps | 100% |
| Vihtavuori N530 | <<locked>> | 84% | 53,403 psi | 86% | 2346 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,071 psi | 88% | 2365 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,330 psi | 86% | 2434 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,119 psi | 68% | 2339 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,708 psi | 88% | 2411 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,243 psi | 85% | 2388 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 56,144 psi | 90% | 2497 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,185 psi | 55% | 2287 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 55,550 psi | 89% | 2421 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% | 48,486 psi | 78% | 2218 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,582 psi | 65% | 2159 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,095 psi | 77% | 2293 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 40,306 psi | 65% | 2146 fps | 95.2% |
| Accurate 3100 | <<locked>> | 96% | 34,780 psi | 56% | 2156 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 38,421 psi | 62% | 2159 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 27,920 psi | 45% | 2014 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 44,469 psi | 71% | 2257 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 37,855 psi | 61% | 2136 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 98% | 45,179 psi | 72% | 2329 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,630 psi | 75% | 2260 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 47,224 psi | 76% | 2241 fps | 100% |
| Alliant Power Pro 2000-MR | 51.2 gr | 80% | 40,538 psi | 65% | 2300 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 44,991 psi | 72% | 2333 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 44,991 psi | 72% | 2333 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,550 psi | 60% | 2159 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,161 psi | 64% | 2208 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 29,080 psi | 47% | 2034 fps | 95.3% |
| Alliant Reloder-17 | 50.4 gr | 80% | 32,227 psi | 52% | 2139 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 98% | 44,367 psi | 71% | 2326 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 88% | 26,542 psi | 43% | 2005 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 92% | 32,300 psi | 52% | 2201 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,787 psi | 70% | 2270 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 36,985 psi | 59% | 2159 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 40,538 psi | 65% | 2182 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,457 psi | 78% | 2247 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,469 psi | 73% | 2287 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,488 psi | 81% | 2415 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,855 psi | 61% | 2165 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 86% | 37,463 psi | 60% | 2208 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 88% | 43,845 psi | 70% | 2274 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 44,904 psi | 72% | 2267 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,498 psi | 42% | 1952 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,031 psi | 66% | 2251 fps | 99.9% |
| Hodgdon Superformance | 58.6 gr | 88% | 39,595 psi | 63% | 2267 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,397 psi | 42% | 1270 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,279 psi | 69% | 2231 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 44,744 psi | 72% | 2254 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,755 psi | 64% | 2162 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,264 psi | 68% | 2185 fps | 96.6% |
| IMR 4350 | <<locked>> | 90% | 40,785 psi | 65% | 2211 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 37,463 psi | 60% | 2126 fps | 95.1% |
| IMR 4831 | <<locked>> | 82% | 29,356 psi | 47% | 2031 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 41,162 psi | 66% | 2231 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 46,630 psi | 75% | 2260 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 52,576 psi | 84% | 2329 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,569 psi | 70% | 2241 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,614 psi | 72% | 2201 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 39,523 psi | 63% | 2162 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 32,416 psi | 52% | 2034 fps | 95.1% |
| Lovex S070 | <<locked>> | 86% | 37,057 psi | 59% | 2149 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 43,526 psi | 70% | 2215 fps | 100% |
| Norma 202 | <<locked>> | 80% | 44,048 psi | 71% | 2221 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,494 psi | 63% | 2198 fps | 99.4% |
| Norma 204 | <<locked>> | 94% | 46,035 psi | 74% | 2333 fps | 95.6% |
| Norma MRP | <<locked>> | 96% | 37,637 psi | 60% | 2280 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 28,790 psi | 46% | 2024 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 39,204 psi | 63% | 2215 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 34,229 psi | 55% | 2149 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 46,528 psi | 75% | 2277 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,006 psi | 74% | 2290 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,386 psi | 81% | 2306 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,701 psi | 43% | 1299 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,446 psi | 84% | 2326 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,363 psi | 62% | 2152 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,482 psi | 68% | 2300 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,360 psi | 55% | 2192 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 29,979 psi | 48% | 2080 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 32,329 psi | 52% | 2133 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 47,297 psi | 76% | 2241 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,379 psi | 66% | 2175 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 34,679 psi | 56% | 2113 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 42,714 psi | 68% | 2306 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 86% | 40,538 psi | 65% | 2182 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 32,416 psi | 52% | 2034 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,569 psi | 70% | 2241 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,523 psi | 63% | 2162 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 37,057 psi | 59% | 2149 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,795 psi | 57% | 2159 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,599 psi | 72% | 2254 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,033 psi | 69% | 2238 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,005 psi | 72% | 2169 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,376 psi | 60% | 2060 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 38,537 psi | 62% | 2123 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 42,351 psi | 68% | 2300 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 50,430 psi | 81% | 2333 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,570 psi | 71% | 2172 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,570 psi | 71% | 2251 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 35,636 psi | 57% | 2116 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 25,715 psi | 41% | 1985 fps | 97.3% |
| Somchem S385 | <<locked>> | 96% | 40,524 psi | 65% | 2247 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 50,850 psi | 82% | 2211 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,411 psi | 73% | 2159 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,988 psi | 66% | 2152 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,597 psi | 67% | 2165 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,837 psi | 54% | 2064 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 30,037 psi | 48% | 2024 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 46,891 psi | 75% | 2260 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 40,001 psi | 64% | 2162 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 29,501 psi | 47% | 2028 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 88% | 28,253 psi | 45% | 2064 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,936 psi | 48% | 2008 fps | 97.7% |
| Winchester 748 | <<locked>> | 80% | 46,557 psi | 75% | 2300 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 37,463 psi | 60% | 2208 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 92% | 26,484 psi | 42% | 2070 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,627 psi | 68% | 2244 fps | 99.9% |
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 106 powders for .338 Win Mag. loaded with the .338 | 265gr | Barnes TAC-TX BT. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,543 fps; across all powders the maximum-charge window runs from 1,424 fps to 2,543 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 265.0 gr projectile in 0.338" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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 | 265gr | Barnes TAC-TX 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.