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 Solid BT bullet and 102 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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% | 56,173 psi | 90% | 2539 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,563 psi | 87% | 2566 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,563 psi | 87% | 2566 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 52,823 psi | 85% | 2582 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,157 psi | 87% | 2566 fps | 96.8% |
| Accurate 4064 | <<locked>> | 92% | 54,259 psi | 87% | 2605 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,737 psi | 86% | 2684 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 88% | 55,347 psi | 89% | 2641 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 56,304 psi | 90% | 2638 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,476 psi | 87% | 2595 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,085 psi | 88% | 2569 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 56,318 psi | 90% | 2690 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,549 psi | 87% | 2749 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,825 psi | 90% | 2657 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,941 psi | 90% | 2543 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,142 psi | 85% | 2631 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,880 psi | 83% | 2684 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 96% | 53,040 psi | 85% | 2723 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,970 psi | 59% | 2441 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,002 psi | 66% | 2582 fps | 97.3% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,984 psi | 88% | 2654 fps | 99.7% |
| Bofors RP3 | <<locked>> | 92% | 53,011 psi | 85% | 2625 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 53,461 psi | 86% | 2595 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,173 psi | 90% | 2575 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,505 psi | 86% | 2621 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,463 psi | 89% | 2717 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 82% | 54,969 psi | 88% | 2585 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,999 psi | 90% | 2612 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,056 psi | 87% | 2635 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 98% | 53,301 psi | 85% | 2680 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 96% | 54,288 psi | 87% | 2644 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 88% | 55,927 psi | 90% | 2651 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,095 psi | 77% | 2572 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,795 psi | 88% | 2677 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 54,056 psi | 87% | 2713 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,418 psi | 57% | 1575 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,679 psi | 86% | 2605 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,506 psi | 89% | 2628 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,695 psi | 89% | 2621 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,869 psi | 90% | 2602 fps | 97.9% |
| IMR 4198 | <<locked>> | 82% | 55,927 psi | 90% | 2500 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,461 psi | 86% | 2618 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,390 psi | 89% | 2628 fps | 97.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,879 psi | 82% | 2628 fps | 99.4% |
| IMR 4895 | <<locked>> | 90% | 54,476 psi | 87% | 2657 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 54,476 psi | 87% | 2595 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,389 psi | 87% | 2579 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,853 psi | 88% | 2618 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,969 psi | 88% | 2569 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 55,347 psi | 89% | 2618 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,346 psi | 87% | 2618 fps | 98.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,201 psi | 89% | 2651 fps | 98.1% |
| Norma 201 | <<locked>> | 88% | 53,969 psi | 87% | 2585 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,433 psi | 87% | 2589 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,709 psi | 89% | 2667 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 52,895 psi | 85% | 2671 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 92% | 56,333 psi | 90% | 2690 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,735 psi | 83% | 2667 fps | 98.2% |
| Ramshot TAC | <<locked>> | 86% | 54,607 psi | 88% | 2612 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,157 psi | 87% | 2631 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,216 psi | 89% | 2595 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,810 psi | 57% | 1614 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,853 psi | 86% | 2575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,433 psi | 87% | 2618 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,403 psi | 86% | 2690 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 52,765 psi | 85% | 2723 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,243 psi | 85% | 2703 fps | 99.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,359 psi | 86% | 2730 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 86% | 55,143 psi | 88% | 2569 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,592 psi | 88% | 2585 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 52,895 psi | 85% | 2618 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 53,461 psi | 86% | 2595 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,346 psi | 87% | 2618 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,853 psi | 88% | 2618 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,347 psi | 89% | 2618 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,201 psi | 89% | 2651 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,462 psi | 87% | 2674 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 52,910 psi | 85% | 2592 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,606 psi | 86% | 2612 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,883 psi | 90% | 2533 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,608 psi | 89% | 2526 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,027 psi | 88% | 2579 fps | 97.7% |
| Somchem S321 | <<locked>> | 84% | 55,579 psi | 89% | 2625 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,926 psi | 88% | 2530 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,173 psi | 90% | 2631 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 53,258 psi | 85% | 2615 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,427 psi | 76% | 2628 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 55,492 psi | 89% | 2493 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,014 psi | 90% | 2516 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,070 psi | 87% | 2552 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,940 psi | 88% | 2569 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,824 psi | 88% | 2598 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,579 psi | 89% | 2667 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 86% | 54,940 psi | 88% | 2595 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,434 psi | 90% | 2612 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,491 psi | 87% | 2674 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,885 psi | 64% | 2510 fps | 98.2% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,144 psi | 90% | 2651 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 54,621 psi | 88% | 2638 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,301 psi | 85% | 2680 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,996 psi | 53% | 2431 fps | 97.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,229 psi | 85% | 2618 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% | 46,731 psi | 75% | 2415 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,184 psi | 82% | 2523 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,494 psi | 63% | 2349 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,209 psi | 74% | 2487 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,543 psi | 76% | 2464 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 37,362 psi | 60% | 2343 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 33,272 psi | 53% | 2323 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 43,091 psi | 69% | 2448 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 36,709 psi | 59% | 2310 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,107 psi | 72% | 2454 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 45,121 psi | 72% | 2441 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,750 psi | 85% | 2641 fps | 100% |
| Alliant Power Pro 2000-MR | 55.1 gr | 80% | 39,044 psi | 63% | 2470 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,056 psi | 58% | 2326 fps | 98.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,707 psi | 85% | 2503 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,870 psi | 62% | 2385 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,866 psi | 54% | 2336 fps | 95.5% |
| Alliant Reloder-17 | 54.2 gr | 80% | 31,096 psi | 50% | 2293 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,850 psi | 49% | 2293 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,679 psi | 57% | 2464 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,076 psi | 67% | 2448 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 35,549 psi | 57% | 2329 fps | 98.4% |
| Bofors RP7 | <<locked>> | 92% | 47,123 psi | 76% | 2497 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,934 psi | 75% | 2444 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,801 psi | 70% | 2477 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,254 psi | 77% | 2608 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 80% | 51,459 psi | 83% | 2539 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,344 psi | 84% | 2562 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,550 psi | 59% | 2333 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 92% | 43,714 psi | 70% | 2526 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 92% | 47,877 psi | 77% | 2546 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 43,468 psi | 70% | 2457 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 29,138 psi | 47% | 2192 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,305 psi | 63% | 2431 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 94% | 46,862 psi | 75% | 2598 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,281 psi | 42% | 1404 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,684 psi | 67% | 2411 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 42,873 psi | 69% | 2451 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,522 psi | 62% | 2339 fps | 97.8% |
| IMR 4166 Enduron | <<locked>> | 82% | 43,642 psi | 70% | 2408 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 52,939 psi | 85% | 2464 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 47,152 psi | 76% | 2523 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 43,482 psi | 70% | 2434 fps | 95.2% |
| IMR 4831 | <<locked>> | 86% | 32,300 psi | 52% | 2283 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 39,784 psi | 64% | 2415 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 80% | 45,107 psi | 72% | 2454 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 51,039 psi | 82% | 2533 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,061 psi | 67% | 2428 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,323 psi | 69% | 2388 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 38,363 psi | 62% | 2346 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 37,942 psi | 61% | 2336 fps | 95.3% |
| Lovex S070 | <<locked>> | 92% | 43,134 psi | 69% | 2457 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 42,308 psi | 68% | 2405 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 42,337 psi | 68% | 2411 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,232 psi | 61% | 2379 fps | 98.2% |
| Norma URP | <<locked>> | 86% | 33,823 psi | 54% | 2326 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 37,666 psi | 60% | 2388 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 40,103 psi | 64% | 2464 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 44,889 psi | 72% | 2457 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,309 psi | 71% | 2477 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,704 psi | 78% | 2500 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,716 psi | 43% | 1440 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,531 psi | 81% | 2526 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,250 psi | 68% | 2421 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,611 psi | 65% | 2480 fps | 98.2% |
| ReloadSwiss RS 60 | 54.2 gr | 80% | 33,127 psi | 53% | 2359 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,389 psi | 57% | 2392 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 38,101 psi | 61% | 2448 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 46,166 psi | 74% | 2441 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,118 psi | 64% | 2359 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 33,533 psi | 54% | 2280 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 92% | 47,123 psi | 76% | 2497 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,942 psi | 61% | 2336 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,061 psi | 67% | 2428 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,363 psi | 62% | 2346 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 92% | 43,134 psi | 69% | 2457 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,534 psi | 55% | 2326 fps | 97% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,250 psi | 69% | 2438 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,582 psi | 67% | 2418 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,729 psi | 70% | 2362 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,274 psi | 58% | 2241 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 42,322 psi | 68% | 2382 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 48,617 psi | 78% | 2526 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,308 psi | 69% | 2365 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,830 psi | 69% | 2431 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 34,563 psi | 55% | 2290 fps | 97.6% |
| Somchem S365 | <<locked>> | 82% | 26,629 psi | 43% | 2178 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 49,371 psi | 79% | 2415 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,005 psi | 71% | 2356 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,595 psi | 63% | 2346 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,132 psi | 64% | 2352 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,692 psi | 52% | 2228 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 84% | 33,156 psi | 53% | 2280 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 45,020 psi | 72% | 2448 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,609 psi | 62% | 2343 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 34,693 psi | 56% | 2329 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 92% | 30,951 psi | 50% | 2313 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,066 psi | 47% | 2159 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 44,585 psi | 71% | 2493 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 43,947 psi | 70% | 2530 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,051 psi | 47% | 2306 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,886 psi | 66% | 2421 fps | 99.1% |
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 102 powders for .338 Win Mag. loaded with the .338 | 225gr | Barnes Solid BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,749 fps; across all powders the maximum-charge window runs from 1,575 fps to 2,749 fps. Accurate 4350 gives the best case fill at 100 %, and 102 of the 102 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 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. Alliant Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for .338 Win Mag. with the .338 | 225gr | Barnes Solid 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.