Load Specifications
Bullet Manufacturer:Barnes
Bullet Weight:225 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:1:12.5
Load data in caliber .338 Win Mag. with .338 | 225gr | Barnes TTSX 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 ReloadSwiss RS 60, Alliant Power Pro 2000-MR 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>> | 86% | 54,708 psi | 88% | 2530 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 52,997 psi | 85% | 2556 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,970 psi | 90% | 2589 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,158 psi | 88% | 2618 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 56,434 psi | 90% | 2602 fps | 97.2% |
| Accurate 4064 | <<locked>> | 94% | 55,999 psi | 90% | 2635 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,098 psi | 84% | 2667 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 88% | 53,882 psi | 86% | 2625 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 54,955 psi | 88% | 2625 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,040 psi | 85% | 2579 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 53,461 psi | 86% | 2556 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,013 psi | 88% | 2680 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,388 psi | 86% | 2733 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,520 psi | 87% | 2644 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,636 psi | 88% | 2533 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,245 psi | 89% | 2664 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,720 psi | 81% | 2671 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,332 psi | 89% | 2759 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,766 psi | 57% | 2421 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,508 psi | 63% | 2556 fps | 96.8% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,838 psi | 86% | 2644 fps | 99.6% |
| Bofors RP3 | <<locked>> | 94% | 55,100 psi | 88% | 2657 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,448 psi | 89% | 2628 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,085 psi | 88% | 2566 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,622 psi | 89% | 2657 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 53,969 psi | 87% | 2700 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 53,766 psi | 86% | 2572 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,781 psi | 88% | 2602 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 56,260 psi | 90% | 2671 fps | 99.5% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 55,608 psi | 89% | 2720 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 96% | 53,185 psi | 85% | 2635 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 88% | 54,375 psi | 87% | 2635 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,847 psi | 75% | 2559 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,577 psi | 86% | 2667 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 52,910 psi | 85% | 2700 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,027 psi | 56% | 1572 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,811 psi | 89% | 2638 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 54,172 psi | 87% | 2615 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,592 psi | 88% | 2608 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,810 psi | 88% | 2592 fps | 97.8% |
| IMR 4198 | <<locked>> | 82% | 54,940 psi | 88% | 2493 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,098 psi | 84% | 2602 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,317 psi | 87% | 2615 fps | 97.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,501 psi | 79% | 2612 fps | 99.2% |
| IMR 4895 | <<locked>> | 90% | 53,127 psi | 85% | 2644 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 53,040 psi | 85% | 2579 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 52,866 psi | 85% | 2566 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,330 psi | 86% | 2605 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,940 psi | 86% | 2562 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 53,998 psi | 87% | 2605 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 53,040 psi | 85% | 2602 fps | 98.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,853 psi | 86% | 2635 fps | 97.9% |
| Norma 201 | <<locked>> | 90% | 56,028 psi | 90% | 2618 fps | 100% |
| Norma 202 | <<locked>> | 88% | 53,127 psi | 85% | 2575 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,389 psi | 87% | 2651 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 51,619 psi | 83% | 2657 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 92% | 55,085 psi | 88% | 2680 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,546 psi | 81% | 2651 fps | 98% |
| Ramshot TAC | <<locked>> | 86% | 53,476 psi | 86% | 2602 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 88% | 56,434 psi | 90% | 2667 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,099 psi | 87% | 2585 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,360 psi | 57% | 1608 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,130 psi | 90% | 2608 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,243 psi | 85% | 2605 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,738 psi | 89% | 2730 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,056 psi | 88% | 2759 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,851 psi | 83% | 2690 fps | 99.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,156 psi | 84% | 2713 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 86% | 53,534 psi | 86% | 2556 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 56,420 psi | 90% | 2618 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,650 psi | 88% | 2648 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 55,448 psi | 89% | 2628 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,040 psi | 85% | 2602 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,330 psi | 86% | 2605 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 53,998 psi | 87% | 2605 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,853 psi | 86% | 2635 fps | 97.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,825 psi | 90% | 2585 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,258 psi | 85% | 2661 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,724 psi | 89% | 2552 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,274 psi | 89% | 2628 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,796 psi | 89% | 2648 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,665 psi | 88% | 2520 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,447 psi | 87% | 2516 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,519 psi | 86% | 2559 fps | 97.5% |
| Somchem S321 | <<locked>> | 84% | 54,288 psi | 87% | 2615 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,679 psi | 86% | 2520 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,969 psi | 88% | 2621 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 55,361 psi | 89% | 2648 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,832 psi | 73% | 2608 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,360 psi | 87% | 2484 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,882 psi | 88% | 2507 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,057 psi | 90% | 2582 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,708 psi | 86% | 2559 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 53,243 psi | 85% | 2582 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,331 psi | 87% | 2654 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 86% | 53,737 psi | 86% | 2582 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,216 psi | 89% | 2598 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,185 psi | 85% | 2661 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,435 psi | 62% | 2487 fps | 97.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,013 psi | 88% | 2641 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 53,127 psi | 85% | 2625 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,608 psi | 89% | 2720 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,749 psi | 51% | 2398 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,753 psi | 89% | 2657 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% | 45,353 psi | 73% | 2402 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,647 psi | 80% | 2510 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,652 psi | 60% | 2329 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,759 psi | 72% | 2470 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 46,398 psi | 74% | 2451 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 35,621 psi | 57% | 2320 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 33,939 psi | 54% | 2346 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 41,887 psi | 67% | 2431 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 35,650 psi | 57% | 2293 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,990 psi | 71% | 2441 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 43,801 psi | 70% | 2428 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,416 psi | 82% | 2628 fps | 100% |
| Alliant Power Pro 2000-MR | 54.9 gr | 80% | 37,739 psi | 61% | 2451 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,809 psi | 56% | 2310 fps | 98.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,430 psi | 82% | 2490 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,608 psi | 60% | 2369 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 32,793 psi | 53% | 2313 fps | 95% |
| Alliant Reloder-17 | 54.1 gr | 80% | 30,008 psi | 48% | 2270 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,675 psi | 48% | 2267 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,796 psi | 59% | 2493 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,915 psi | 66% | 2434 fps | 97.8% |
| Bofors RP3 | <<locked>> | 80% | 34,098 psi | 55% | 2306 fps | 98% |
| Bofors RP7 | <<locked>> | 92% | 45,876 psi | 74% | 2480 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,876 psi | 74% | 2431 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,293 psi | 68% | 2457 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,804 psi | 75% | 2589 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 80% | 50,343 psi | 81% | 2526 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,155 psi | 82% | 2552 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 35,230 psi | 56% | 2313 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 92% | 42,540 psi | 68% | 2507 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 94% | 49,864 psi | 80% | 2582 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 42,235 psi | 68% | 2441 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,776 psi | 48% | 2218 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,116 psi | 61% | 2415 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 94% | 45,687 psi | 73% | 2582 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,078 psi | 42% | 1404 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,567 psi | 65% | 2398 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 41,553 psi | 67% | 2434 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,405 psi | 60% | 2323 fps | 97.5% |
| IMR 4166 Enduron | <<locked>> | 82% | 42,583 psi | 68% | 2392 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 51,938 psi | 83% | 2454 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 46,035 psi | 74% | 2507 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 44,991 psi | 72% | 2467 fps | 95.6% |
| IMR 4831 | <<locked>> | 88% | 33,214 psi | 53% | 2313 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 38,522 psi | 62% | 2398 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 43,990 psi | 71% | 2441 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 49,298 psi | 79% | 2513 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,379 psi | 65% | 2408 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,279 psi | 68% | 2375 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 37,072 psi | 59% | 2326 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 38,914 psi | 62% | 2365 fps | 95.6% |
| Lovex S070 | <<locked>> | 92% | 41,843 psi | 67% | 2438 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 40,930 psi | 66% | 2388 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 41,118 psi | 66% | 2395 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,999 psi | 59% | 2359 fps | 97.9% |
| Norma URP | <<locked>> | 88% | 34,708 psi | 56% | 2352 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 36,332 psi | 58% | 2365 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 38,957 psi | 62% | 2444 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 43,758 psi | 70% | 2444 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,105 psi | 69% | 2461 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,558 psi | 76% | 2487 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,266 psi | 42% | 1437 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,385 psi | 79% | 2516 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 40,872 psi | 66% | 2402 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,305 psi | 63% | 2461 fps | 97.9% |
| ReloadSwiss RS 60 | 54.1 gr | 80% | 31,995 psi | 51% | 2336 fps | 98.9% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,127 psi | 55% | 2369 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,028 psi | 59% | 2428 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 44,585 psi | 71% | 2425 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,783 psi | 62% | 2339 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 32,097 psi | 51% | 2257 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 92% | 45,876 psi | 74% | 2480 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,914 psi | 62% | 2365 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,379 psi | 65% | 2408 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,072 psi | 59% | 2326 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 41,843 psi | 67% | 2438 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,040 psi | 83% | 2533 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,388 psi | 54% | 2306 fps | 96.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,388 psi | 84% | 2513 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,742 psi | 67% | 2415 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,422 psi | 65% | 2405 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,554 psi | 68% | 2349 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,157 psi | 56% | 2224 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 43,714 psi | 70% | 2411 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 47,311 psi | 76% | 2513 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,047 psi | 67% | 2349 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,655 psi | 67% | 2418 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 33,243 psi | 53% | 2267 fps | 97.2% |
| Somchem S365 | <<locked>> | 82% | 25,454 psi | 41% | 2149 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 48,196 psi | 77% | 2405 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,873 psi | 69% | 2346 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,247 psi | 61% | 2329 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,928 psi | 62% | 2336 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,473 psi | 50% | 2208 fps | 98% |
| Vihtavuori N160 | <<locked>> | 86% | 34,011 psi | 55% | 2306 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 43,859 psi | 70% | 2434 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 37,420 psi | 60% | 2326 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 35,766 psi | 57% | 2359 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 94% | 31,517 psi | 51% | 2336 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,994 psi | 48% | 2188 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 43,395 psi | 70% | 2477 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 42,540 psi | 68% | 2507 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,689 psi | 48% | 2336 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,711 psi | 64% | 2405 fps | 98.9% |
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 104 powders for .338 Win Mag. loaded with the .338 | 225gr | Barnes TTSX BT. Alliant Reloder-17 delivers the highest muzzle velocity at 2,759 fps; across all powders the maximum-charge window runs from 1,572 fps to 2,759 fps. Accurate 4350 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 51–90 %, leaving at least 10 % headroom. The 225.0 gr projectile in 0.338" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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 Power Pro 2000-MR, Alliant Reloder-17 rank at the top here: for .338 Win Mag. with the .338 | 225gr | Barnes TTSX 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.