Load Specifications
Bullet Manufacturer:Peregrine
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:1:11.5
Load data in caliber .338 Win Mag. with .338 | 225gr | Peregrine VLR-4 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% | 54,230 psi | 87% | 2520 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 56,144 psi | 90% | 2592 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,477 psi | 89% | 2582 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,447 psi | 87% | 2605 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 55,912 psi | 90% | 2592 fps | 97.1% |
| Accurate 4064 | <<locked>> | 94% | 55,259 psi | 89% | 2625 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,474 psi | 83% | 2654 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 88% | 53,461 psi | 86% | 2615 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 54,607 psi | 88% | 2618 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 56,115 psi | 90% | 2618 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 52,924 psi | 85% | 2546 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,491 psi | 87% | 2671 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 52,837 psi | 85% | 2723 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,172 psi | 87% | 2638 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,128 psi | 87% | 2523 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,897 psi | 88% | 2657 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,212 psi | 81% | 2661 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,824 psi | 88% | 2753 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,360 psi | 57% | 2408 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,131 psi | 63% | 2543 fps | 96.6% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 56,318 psi | 90% | 2510 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,243 psi | 85% | 2631 fps | 99.5% |
| Bofors RP3 | <<locked>> | 94% | 54,418 psi | 87% | 2648 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 54,882 psi | 88% | 2618 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,694 psi | 88% | 2559 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,245 psi | 89% | 2648 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 53,577 psi | 86% | 2690 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 53,330 psi | 86% | 2566 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,404 psi | 87% | 2592 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,637 psi | 89% | 2661 fps | 99.4% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 54,795 psi | 88% | 2703 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 98% | 56,159 psi | 90% | 2674 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 88% | 54,012 psi | 87% | 2625 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,340 psi | 74% | 2546 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 52,924 psi | 85% | 2654 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 56,159 psi | 90% | 2743 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,998 psi | 56% | 1568 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,419 psi | 89% | 2628 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 53,679 psi | 86% | 2608 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,925 psi | 86% | 2598 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,230 psi | 87% | 2579 fps | 97.6% |
| IMR 4198 | <<locked>> | 82% | 54,679 psi | 88% | 2487 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 51,605 psi | 83% | 2592 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 96% | 53,795 psi | 86% | 2602 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,936 psi | 78% | 2598 fps | 99.1% |
| IMR 4895 | <<locked>> | 92% | 56,318 psi | 90% | 2687 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 56,115 psi | 90% | 2618 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 56,304 psi | 90% | 2605 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 56,289 psi | 90% | 2638 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,534 psi | 86% | 2552 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 53,606 psi | 86% | 2595 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,956 psi | 90% | 2641 fps | 98.9% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,301 psi | 85% | 2625 fps | 97.7% |
| Norma 201 | <<locked>> | 90% | 55,376 psi | 89% | 2608 fps | 100% |
| Norma 202 | <<locked>> | 90% | 55,970 psi | 90% | 2612 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,056 psi | 87% | 2644 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 51,039 psi | 82% | 2648 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 92% | 54,491 psi | 87% | 2671 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,053 psi | 80% | 2641 fps | 97.8% |
| Ramshot TAC | <<locked>> | 86% | 52,924 psi | 85% | 2589 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 88% | 56,072 psi | 90% | 2657 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 53,780 psi | 86% | 2575 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,317 psi | 57% | 1604 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,724 psi | 89% | 2602 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 52,678 psi | 84% | 2595 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,274 psi | 89% | 2720 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,505 psi | 87% | 2749 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,010 psi | 82% | 2674 fps | 99.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,474 psi | 83% | 2700 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 88% | 56,347 psi | 90% | 2589 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 56,014 psi | 90% | 2608 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,012 psi | 87% | 2635 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 54,882 psi | 88% | 2618 fps | 97.2% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,956 psi | 90% | 2641 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 56,289 psi | 90% | 2638 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 53,606 psi | 86% | 2595 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,301 psi | 85% | 2625 fps | 97.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,434 psi | 89% | 2575 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 56,246 psi | 90% | 2700 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,216 psi | 89% | 2546 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,708 psi | 88% | 2618 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,477 psi | 89% | 2641 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,244 psi | 87% | 2513 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,128 psi | 87% | 2510 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 52,939 psi | 85% | 2549 fps | 97.3% |
| Somchem S321 | <<locked>> | 84% | 53,635 psi | 86% | 2602 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,243 psi | 85% | 2510 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,346 psi | 87% | 2612 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 54,737 psi | 88% | 2638 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,295 psi | 73% | 2595 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 53,867 psi | 86% | 2477 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,447 psi | 87% | 2500 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,564 psi | 89% | 2572 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,330 psi | 86% | 2549 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 56,333 psi | 90% | 2618 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,722 psi | 86% | 2644 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 86% | 53,084 psi | 85% | 2572 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 54,621 psi | 88% | 2589 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,620 psi | 84% | 2651 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,913 psi | 61% | 2477 fps | 97.6% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,346 psi | 87% | 2628 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 56,318 psi | 90% | 2664 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,071 psi | 88% | 2707 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,473 psi | 50% | 2388 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,129 psi | 88% | 2648 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% | 45,092 psi | 72% | 2398 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,994 psi | 79% | 2497 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,173 psi | 60% | 2320 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,338 psi | 71% | 2461 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 48,878 psi | 78% | 2487 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 35,201 psi | 56% | 2310 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 33,562 psi | 54% | 2336 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 41,466 psi | 66% | 2421 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 80% | 35,273 psi | 57% | 2283 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,613 psi | 70% | 2431 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 43,294 psi | 69% | 2418 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,937 psi | 82% | 2618 fps | 99.9% |
| Alliant Power Pro 2000-MR | 54.4 gr | 80% | 37,420 psi | 60% | 2438 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,621 psi | 56% | 2303 fps | 98% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,908 psi | 82% | 2480 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,202 psi | 60% | 2359 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,534 psi | 55% | 2352 fps | 95.7% |
| Alliant Reloder-17 | 53.6 gr | 80% | 29,733 psi | 48% | 2260 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,312 psi | 47% | 2254 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,419 psi | 58% | 2484 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,779 psi | 85% | 2467 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,582 psi | 65% | 2425 fps | 97.6% |
| Bofors RP3 | <<locked>> | 80% | 33,910 psi | 54% | 2303 fps | 97.9% |
| Bofors RP7 | <<locked>> | 92% | 45,571 psi | 73% | 2470 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,455 psi | 73% | 2421 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,872 psi | 67% | 2448 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,354 psi | 74% | 2579 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 80% | 49,850 psi | 80% | 2516 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,749 psi | 81% | 2543 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 34,911 psi | 56% | 2303 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 92% | 42,003 psi | 67% | 2493 fps | 95% |
| Hodgdon H4350 | <<locked>> | 94% | 49,356 psi | 79% | 2572 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 41,829 psi | 67% | 2431 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,472 psi | 47% | 2208 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,753 psi | 61% | 2405 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 94% | 45,281 psi | 73% | 2569 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,962 psi | 42% | 1398 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,205 psi | 64% | 2388 fps | 98.8% |
| IMR 3031 | <<locked>> | 80% | 41,278 psi | 66% | 2431 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,014 psi | 59% | 2313 fps | 97.3% |
| IMR 4166 Enduron | <<locked>> | 84% | 45,034 psi | 72% | 2434 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 51,387 psi | 82% | 2444 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 45,571 psi | 73% | 2497 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 44,686 psi | 72% | 2457 fps | 95.5% |
| IMR 4831 | <<locked>> | 88% | 32,706 psi | 52% | 2300 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 38,130 psi | 61% | 2388 fps | 98.1% |
| IMR 8208 XBR | <<locked>> | 80% | 43,613 psi | 70% | 2431 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 48,907 psi | 78% | 2507 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,176 psi | 64% | 2402 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 41,887 psi | 67% | 2365 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 36,651 psi | 59% | 2316 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 38,580 psi | 62% | 2356 fps | 95.4% |
| Lovex S070 | <<locked>> | 92% | 41,292 psi | 66% | 2425 fps | 95% |
| Norma 201 | <<locked>> | 80% | 40,509 psi | 65% | 2379 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 40,857 psi | 66% | 2388 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,608 psi | 59% | 2349 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 34,360 psi | 55% | 2343 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 35,984 psi | 58% | 2359 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 94% | 41,046 psi | 66% | 2484 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 43,424 psi | 70% | 2434 fps | 96.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,757 psi | 69% | 2454 fps | 98.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,978 psi | 75% | 2474 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,353 psi | 42% | 1434 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,950 psi | 78% | 2507 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 40,524 psi | 65% | 2392 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,870 psi | 62% | 2451 fps | 97.8% |
| ReloadSwiss RS 60 | 53.6 gr | 80% | 31,691 psi | 51% | 2326 fps | 98.8% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 35,955 psi | 58% | 2408 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 39,247 psi | 63% | 2474 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 44,150 psi | 71% | 2415 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,566 psi | 62% | 2333 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 31,734 psi | 51% | 2247 fps | 97% |
| Rottweil R 907 | <<locked>> | 92% | 45,571 psi | 73% | 2470 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 38,580 psi | 62% | 2356 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,176 psi | 64% | 2402 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 36,651 psi | 59% | 2316 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 92% | 41,292 psi | 66% | 2425 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,663 psi | 83% | 2523 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,054 psi | 53% | 2297 fps | 96.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,837 psi | 83% | 2503 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,408 psi | 66% | 2405 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,059 psi | 64% | 2395 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,105 psi | 68% | 2339 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,766 psi | 56% | 2218 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 43,366 psi | 70% | 2402 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 46,949 psi | 75% | 2503 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 41,669 psi | 67% | 2343 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,321 psi | 66% | 2408 fps | 98.6% |
| Somchem S355 | <<locked>> | 80% | 32,880 psi | 53% | 2257 fps | 97.1% |
| Somchem S365 | <<locked>> | 84% | 26,905 psi | 43% | 2195 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 47,732 psi | 77% | 2395 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,409 psi | 68% | 2336 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,768 psi | 61% | 2320 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,508 psi | 62% | 2329 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,111 psi | 50% | 2201 fps | 97.9% |
| Vihtavuori N160 | <<locked>> | 86% | 33,707 psi | 54% | 2297 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 43,656 psi | 70% | 2428 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 37,057 psi | 59% | 2320 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 35,244 psi | 57% | 2346 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 94% | 31,227 psi | 50% | 2326 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,776 psi | 48% | 2178 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 42,931 psi | 69% | 2467 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 42,235 psi | 68% | 2500 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,370 psi | 47% | 2323 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,349 psi | 63% | 2398 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 | 225gr | Peregrine VLR-4. Alliant Reloder-17 delivers the highest muzzle velocity at 2,753 fps; across all powders the maximum-charge window runs from 1,568 fps to 2,753 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 225.0 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 | 225gr | Peregrine VLR-4 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.