Load Specifications
Bullet:.338 | 227gr | CutEdge MTAC
Bullet Manufacturer:Cutting Edge
Bullet Weight:227 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:1:11.5
Load data in caliber .338 Win Mag. with .338 | 227gr | CutEdge MTAC bullet and 105 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% | 54,215 psi | 87% | 2507 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 56,246 psi | 90% | 2579 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,274 psi | 89% | 2566 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,549 psi | 87% | 2592 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,782 psi | 89% | 2572 fps | 97.1% |
| Accurate 4064 | <<locked>> | 94% | 55,347 psi | 89% | 2612 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,387 psi | 82% | 2638 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 88% | 53,548 psi | 86% | 2602 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 54,447 psi | 87% | 2598 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 56,202 psi | 90% | 2605 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 52,939 psi | 85% | 2533 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,476 psi | 87% | 2654 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 52,968 psi | 85% | 2710 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 53,998 psi | 87% | 2618 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,027 psi | 87% | 2507 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,708 psi | 88% | 2638 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,096 psi | 80% | 2644 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,795 psi | 88% | 2736 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,302 psi | 57% | 2395 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 38,943 psi | 62% | 2526 fps | 96.6% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 56,144 psi | 90% | 2497 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,142 psi | 85% | 2615 fps | 99.6% |
| Bofors RP3 | <<locked>> | 94% | 54,273 psi | 87% | 2631 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,013 psi | 88% | 2605 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,723 psi | 88% | 2543 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,114 psi | 88% | 2631 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 53,388 psi | 86% | 2674 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 53,316 psi | 85% | 2549 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,172 psi | 87% | 2575 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,811 psi | 89% | 2648 fps | 99.4% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 54,766 psi | 88% | 2690 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 98% | 56,057 psi | 90% | 2657 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 88% | 54,041 psi | 87% | 2612 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,224 psi | 74% | 2533 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,040 psi | 85% | 2641 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 56,202 psi | 90% | 2730 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,143 psi | 56% | 1558 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,521 psi | 89% | 2615 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 53,722 psi | 86% | 2592 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,998 psi | 87% | 2585 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,331 psi | 87% | 2569 fps | 97.7% |
| IMR 4198 | <<locked>> | 82% | 54,549 psi | 87% | 2470 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 51,517 psi | 83% | 2575 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 96% | 53,635 psi | 86% | 2589 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,878 psi | 78% | 2585 fps | 99.1% |
| IMR 4895 | <<locked>> | 92% | 56,159 psi | 90% | 2667 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 56,202 psi | 90% | 2605 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 56,101 psi | 90% | 2589 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 56,405 psi | 90% | 2625 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,577 psi | 86% | 2539 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 53,403 psi | 86% | 2579 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,912 psi | 90% | 2625 fps | 98.9% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,272 psi | 85% | 2608 fps | 97.8% |
| Norma 201 | <<locked>> | 90% | 55,434 psi | 89% | 2595 fps | 100% |
| Norma 202 | <<locked>> | 90% | 56,043 psi | 90% | 2598 fps | 100% |
| Norma 203B | <<locked>> | 92% | 53,867 psi | 86% | 2628 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 50,937 psi | 82% | 2631 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 92% | 54,418 psi | 87% | 2654 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,777 psi | 80% | 2625 fps | 97.8% |
| Ramshot TAC | <<locked>> | 86% | 53,040 psi | 85% | 2575 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,956 psi | 90% | 2641 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 53,563 psi | 86% | 2559 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,476 psi | 57% | 1594 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,738 psi | 89% | 2585 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 56,333 psi | 90% | 2631 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,100 psi | 88% | 2700 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,433 psi | 87% | 2733 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,024 psi | 82% | 2661 fps | 99.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,517 psi | 83% | 2687 fps | 99% |
| Rottweil R 901 | <<locked>> | 88% | 56,362 psi | 90% | 2575 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,811 psi | 89% | 2592 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,143 psi | 87% | 2621 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 55,013 psi | 88% | 2605 fps | 97.2% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,912 psi | 90% | 2625 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 56,405 psi | 90% | 2625 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 53,403 psi | 86% | 2579 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,272 psi | 85% | 2608 fps | 97.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,506 psi | 89% | 2562 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 56,144 psi | 90% | 2684 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,114 psi | 88% | 2530 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,549 psi | 87% | 2602 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,317 psi | 89% | 2625 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 53,983 psi | 87% | 2497 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 53,896 psi | 86% | 2493 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 52,852 psi | 85% | 2533 fps | 97.4% |
| Somchem S321 | <<locked>> | 84% | 53,737 psi | 86% | 2589 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,301 psi | 85% | 2497 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,244 psi | 87% | 2595 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 54,578 psi | 88% | 2621 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,266 psi | 73% | 2582 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 53,824 psi | 86% | 2461 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,186 psi | 87% | 2484 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,347 psi | 89% | 2556 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,098 psi | 85% | 2533 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 56,188 psi | 90% | 2602 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,679 psi | 86% | 2628 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 86% | 53,098 psi | 85% | 2556 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 54,766 psi | 88% | 2579 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,576 psi | 84% | 2635 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,840 psi | 61% | 2461 fps | 97.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,331 psi | 87% | 2615 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 52,823 psi | 85% | 2605 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,042 psi | 88% | 2694 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,270 psi | 50% | 2369 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,013 psi | 88% | 2631 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% | 45,049 psi | 72% | 2382 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,023 psi | 79% | 2484 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,144 psi | 60% | 2306 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,338 psi | 71% | 2448 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 45,919 psi | 74% | 2425 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 35,157 psi | 56% | 2297 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 33,620 psi | 54% | 2326 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 41,437 psi | 66% | 2408 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 80% | 35,259 psi | 57% | 2270 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,569 psi | 70% | 2418 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 43,468 psi | 70% | 2408 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,879 psi | 82% | 2602 fps | 100% |
| Alliant Power Pro 2000-MR | 54 gr | 80% | 37,420 psi | 60% | 2428 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,577 psi | 55% | 2290 fps | 98% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,778 psi | 81% | 2467 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,217 psi | 60% | 2346 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,519 psi | 55% | 2343 fps | 95.8% |
| Alliant Reloder-17 | 53.2 gr | 80% | 29,704 psi | 48% | 2251 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,370 psi | 47% | 2244 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,405 psi | 58% | 2470 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,808 psi | 85% | 2454 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,596 psi | 65% | 2411 fps | 97.7% |
| Bofors RP3 | <<locked>> | 80% | 33,881 psi | 54% | 2287 fps | 98% |
| Bofors RP7 | <<locked>> | 92% | 45,397 psi | 73% | 2454 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,397 psi | 73% | 2408 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,901 psi | 67% | 2434 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,398 psi | 74% | 2566 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 80% | 50,067 psi | 80% | 2507 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,763 psi | 81% | 2530 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 34,896 psi | 56% | 2290 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 92% | 41,887 psi | 67% | 2480 fps | 95% |
| Hodgdon H4350 | <<locked>> | 94% | 49,211 psi | 79% | 2556 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 41,785 psi | 67% | 2418 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,486 psi | 47% | 2195 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,753 psi | 61% | 2392 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 94% | 45,281 psi | 73% | 2556 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,034 psi | 42% | 1391 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,161 psi | 64% | 2372 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 41,234 psi | 66% | 2415 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,941 psi | 59% | 2300 fps | 97.4% |
| IMR 4166 Enduron | <<locked>> | 84% | 45,034 psi | 72% | 2421 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 51,503 psi | 83% | 2431 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 45,469 psi | 73% | 2480 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 44,744 psi | 72% | 2444 fps | 95.5% |
| IMR 4831 | <<locked>> | 88% | 32,721 psi | 52% | 2287 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 38,087 psi | 61% | 2372 fps | 98.2% |
| IMR 8208 XBR | <<locked>> | 80% | 43,569 psi | 70% | 2418 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 48,907 psi | 78% | 2493 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,958 psi | 64% | 2385 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 41,814 psi | 67% | 2352 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 36,637 psi | 59% | 2303 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 38,624 psi | 62% | 2343 fps | 95.5% |
| Lovex S070 | <<locked>> | 92% | 41,379 psi | 66% | 2415 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 40,451 psi | 65% | 2365 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 40,843 psi | 65% | 2375 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,564 psi | 59% | 2336 fps | 97.8% |
| Norma URP | <<locked>> | 88% | 34,418 psi | 55% | 2333 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 36,013 psi | 58% | 2346 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 94% | 40,973 psi | 66% | 2470 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 43,482 psi | 70% | 2421 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,786 psi | 69% | 2441 fps | 98.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,007 psi | 75% | 2461 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,223 psi | 42% | 1424 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,921 psi | 78% | 2493 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 40,596 psi | 65% | 2379 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,870 psi | 62% | 2438 fps | 97.8% |
| ReloadSwiss RS 60 | 53.2 gr | 80% | 31,705 psi | 51% | 2313 fps | 98.8% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,071 psi | 58% | 2398 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 36,695 psi | 59% | 2405 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 44,280 psi | 71% | 2402 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,508 psi | 62% | 2320 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 31,865 psi | 51% | 2238 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 92% | 45,397 psi | 73% | 2454 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,624 psi | 62% | 2343 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,958 psi | 64% | 2385 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 36,637 psi | 59% | 2303 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 92% | 41,379 psi | 66% | 2415 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,692 psi | 83% | 2510 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,054 psi | 53% | 2283 fps | 96.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,764 psi | 83% | 2487 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,423 psi | 66% | 2395 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,059 psi | 64% | 2382 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,047 psi | 67% | 2323 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,693 psi | 56% | 2205 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 43,265 psi | 69% | 2388 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 46,963 psi | 75% | 2490 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 41,597 psi | 67% | 2329 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,321 psi | 66% | 2395 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 32,851 psi | 53% | 2244 fps | 97.1% |
| Somchem S365 | <<locked>> | 84% | 26,890 psi | 43% | 2182 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 47,645 psi | 76% | 2382 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,351 psi | 68% | 2320 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,710 psi | 60% | 2306 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,682 psi | 62% | 2320 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,256 psi | 50% | 2192 fps | 97.9% |
| Vihtavuori N160 | <<locked>> | 86% | 33,736 psi | 54% | 2283 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 43,642 psi | 70% | 2415 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 37,043 psi | 59% | 2306 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 35,302 psi | 57% | 2336 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 94% | 31,125 psi | 50% | 2313 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,660 psi | 48% | 2165 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 42,946 psi | 69% | 2454 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 42,119 psi | 68% | 2484 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,341 psi | 47% | 2310 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,349 psi | 63% | 2385 fps | 98.8% |
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 105 powders for .338 Win Mag. loaded with the .338 | 227gr | CutEdge MTAC. Alliant Reloder-17 delivers the highest muzzle velocity at 2,736 fps; across all powders the maximum-charge window runs from 1,558 fps to 2,736 fps. Accurate 4350 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 227.0 gr projectile in 0.338" calls for a 1:11.5 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 | 227gr | CutEdge MTAC 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.