Load Specifications
Load data in caliber .338 Win Mag. with .338 | 220gr | Atomic 29 HP 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.
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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% | 55,782 psi | 89% | 2585 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,128 psi | 87% | 2612 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,679 psi | 86% | 2605 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,362 psi | 90% | 2677 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,809 psi | 86% | 2608 fps | 96.8% |
| Accurate 4064 | <<locked>> | 92% | 53,664 psi | 86% | 2648 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,432 psi | 86% | 2726 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 88% | 55,085 psi | 88% | 2687 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 55,970 psi | 90% | 2684 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,099 psi | 87% | 2638 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 54,592 psi | 88% | 2612 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,840 psi | 90% | 2736 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,534 psi | 87% | 2799 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,869 psi | 90% | 2703 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,419 psi | 89% | 2585 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,347 psi | 90% | 2723 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,967 psi | 83% | 2733 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 96% | 52,953 psi | 85% | 2772 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,506 psi | 59% | 2474 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,553 psi | 65% | 2618 fps | 97.2% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,984 psi | 88% | 2703 fps | 99.7% |
| Bofors RP3 | <<locked>> | 94% | 56,362 psi | 90% | 2720 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 53,026 psi | 85% | 2638 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,883 psi | 90% | 2621 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,200 psi | 85% | 2667 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,390 psi | 89% | 2762 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 82% | 54,853 psi | 88% | 2631 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,825 psi | 90% | 2657 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 53,867 psi | 86% | 2684 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 98% | 53,214 psi | 85% | 2730 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 96% | 54,157 psi | 87% | 2694 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 88% | 55,637 psi | 89% | 2697 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,877 psi | 77% | 2615 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,810 psi | 88% | 2726 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 54,041 psi | 87% | 2762 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,215 psi | 56% | 1608 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,548 psi | 86% | 2651 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,448 psi | 89% | 2677 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,448 psi | 89% | 2667 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,782 psi | 89% | 2651 fps | 97.9% |
| IMR 4198 | <<locked>> | 82% | 55,898 psi | 90% | 2549 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,185 psi | 85% | 2661 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,361 psi | 89% | 2674 fps | 97.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,734 psi | 81% | 2674 fps | 99.4% |
| IMR 4895 | <<locked>> | 90% | 54,317 psi | 87% | 2707 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 54,099 psi | 87% | 2638 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,896 psi | 86% | 2621 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,534 psi | 87% | 2661 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,911 psi | 88% | 2618 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 55,158 psi | 88% | 2664 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,114 psi | 87% | 2661 fps | 98.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,027 psi | 88% | 2697 fps | 98.1% |
| Norma 201 | <<locked>> | 88% | 53,621 psi | 86% | 2631 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,215 psi | 87% | 2635 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,506 psi | 89% | 2710 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 52,881 psi | 85% | 2720 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 92% | 56,434 psi | 90% | 2743 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,721 psi | 83% | 2713 fps | 98.2% |
| Ramshot TAC | <<locked>> | 86% | 54,360 psi | 87% | 2657 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,983 psi | 87% | 2677 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,158 psi | 88% | 2644 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,534 psi | 57% | 1644 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,592 psi | 86% | 2618 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,259 psi | 87% | 2664 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,287 psi | 85% | 2740 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 52,794 psi | 85% | 2772 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,171 psi | 85% | 2749 fps | 99.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,417 psi | 86% | 2779 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 86% | 54,331 psi | 87% | 2612 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,954 psi | 87% | 2628 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,912 psi | 90% | 2707 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 53,026 psi | 85% | 2638 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,114 psi | 87% | 2661 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,534 psi | 87% | 2661 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,158 psi | 88% | 2664 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,027 psi | 88% | 2697 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,346 psi | 87% | 2720 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 52,562 psi | 84% | 2635 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,447 psi | 86% | 2661 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,579 psi | 89% | 2579 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,637 psi | 89% | 2575 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,665 psi | 88% | 2618 fps | 97.7% |
| Somchem S321 | <<locked>> | 84% | 55,347 psi | 89% | 2671 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,650 psi | 88% | 2572 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,115 psi | 90% | 2680 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 56,318 psi | 90% | 2703 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,050 psi | 75% | 2667 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 55,216 psi | 89% | 2539 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,825 psi | 90% | 2562 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,650 psi | 86% | 2595 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,650 psi | 88% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,404 psi | 87% | 2638 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,506 psi | 89% | 2717 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 86% | 54,491 psi | 87% | 2638 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,405 psi | 90% | 2657 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,476 psi | 87% | 2723 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,566 psi | 63% | 2549 fps | 98.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,173 psi | 90% | 2700 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 54,346 psi | 87% | 2684 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,214 psi | 85% | 2730 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,561 psi | 52% | 2461 fps | 97.5% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,258 psi | 85% | 2667 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% | 46,325 psi | 74% | 2457 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,589 psi | 81% | 2562 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,334 psi | 61% | 2379 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,658 psi | 73% | 2526 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,094 psi | 76% | 2503 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 36,303 psi | 58% | 2369 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 32,518 psi | 52% | 2349 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 42,612 psi | 68% | 2487 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 36,201 psi | 58% | 2343 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,759 psi | 72% | 2493 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 44,860 psi | 72% | 2484 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,402 psi | 84% | 2687 fps | 100% |
| Alliant Power Pro 2000-MR | 57.1 gr | 80% | 38,609 psi | 62% | 2510 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,578 psi | 57% | 2362 fps | 98.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,272 psi | 84% | 2546 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,363 psi | 62% | 2425 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,446 psi | 54% | 2369 fps | 95.3% |
| Alliant Reloder-17 | 56.2 gr | 80% | 30,589 psi | 49% | 2323 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,342 psi | 49% | 2323 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,143 psi | 56% | 2493 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,829 psi | 67% | 2490 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 34,998 psi | 56% | 2365 fps | 98.2% |
| Bofors RP7 | <<locked>> | 92% | 46,847 psi | 75% | 2539 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,615 psi | 75% | 2487 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,294 psi | 69% | 2513 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,863 psi | 77% | 2648 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 80% | 51,213 psi | 82% | 2582 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,228 psi | 84% | 2608 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,071 psi | 58% | 2369 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 92% | 43,584 psi | 70% | 2569 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 92% | 47,630 psi | 76% | 2589 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 42,989 psi | 69% | 2497 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,543 psi | 46% | 2221 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,957 psi | 62% | 2467 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 94% | 46,702 psi | 75% | 2641 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,179 psi | 42% | 1437 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,321 psi | 66% | 2451 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 42,569 psi | 68% | 2493 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,000 psi | 61% | 2375 fps | 97.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 43,308 psi | 69% | 2448 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 52,678 psi | 84% | 2507 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 47,021 psi | 75% | 2566 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 43,207 psi | 69% | 2474 fps | 95.1% |
| IMR 4831 | <<locked>> | 88% | 34,026 psi | 55% | 2369 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 39,276 psi | 63% | 2451 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 44,759 psi | 72% | 2493 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 50,343 psi | 81% | 2572 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,336 psi | 66% | 2464 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,844 psi | 69% | 2428 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 37,666 psi | 60% | 2379 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 37,347 psi | 60% | 2372 fps | 95.1% |
| Lovex S070 | <<locked>> | 92% | 42,743 psi | 69% | 2497 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 41,524 psi | 67% | 2438 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 41,901 psi | 67% | 2451 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,710 psi | 60% | 2411 fps | 98% |
| Norma URP | <<locked>> | 86% | 33,286 psi | 53% | 2356 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 37,231 psi | 60% | 2425 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 39,827 psi | 64% | 2503 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 44,614 psi | 72% | 2500 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,092 psi | 71% | 2520 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,298 psi | 77% | 2543 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,368 psi | 42% | 1470 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,372 psi | 81% | 2572 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,684 psi | 67% | 2457 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,263 psi | 65% | 2520 fps | 98.1% |
| ReloadSwiss RS 60 | 56.2 gr | 80% | 32,634 psi | 52% | 2388 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,925 psi | 56% | 2425 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,782 psi | 61% | 2487 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 45,353 psi | 73% | 2477 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,595 psi | 63% | 2395 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 32,837 psi | 53% | 2310 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 92% | 46,847 psi | 75% | 2539 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,347 psi | 60% | 2372 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,336 psi | 66% | 2464 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,666 psi | 60% | 2379 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 42,743 psi | 69% | 2497 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,127 psi | 55% | 2362 fps | 96.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,670 psi | 68% | 2470 fps | 97.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,249 psi | 66% | 2457 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,265 psi | 69% | 2402 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,810 psi | 57% | 2277 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 44,831 psi | 72% | 2470 fps | 95.8% |
| Somchem S321 | <<locked>> | 80% | 48,312 psi | 77% | 2572 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,627 psi | 68% | 2402 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,583 psi | 68% | 2474 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 33,837 psi | 54% | 2316 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 25,933 psi | 42% | 2198 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 48,936 psi | 78% | 2457 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,598 psi | 70% | 2395 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,015 psi | 63% | 2382 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,697 psi | 64% | 2388 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,155 psi | 52% | 2260 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 34,853 psi | 56% | 2362 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 44,788 psi | 72% | 2490 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,232 psi | 61% | 2382 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 34,229 psi | 55% | 2362 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 94% | 32,489 psi | 52% | 2395 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,645 psi | 46% | 2188 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 44,266 psi | 71% | 2533 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 43,584 psi | 70% | 2569 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,443 psi | 49% | 2398 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,495 psi | 65% | 2461 fps | 99% |
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 119 powders for .338 Win Mag. loaded with the .338 | 220gr | Atomic 29 HP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,799 fps; across all powders the maximum-charge window runs from 1,608 fps to 2,799 fps. Accurate 3100 gives the best case fill at 100 %, and 119 of the 119 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 220.0 gr projectile in 0.338" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, ADI AR 2209 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 | 220gr | Atomic 29 HP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.