Load Specifications
Bullet Manufacturer:TWENTY-NINE
Bullet Weight:224 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 | 224gr | TWENTY-NINE ERTP bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 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% | 55,230 psi | 89% | 2530 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,505 psi | 86% | 2552 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,113 psi | 85% | 2546 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,317 psi | 89% | 2612 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 52,852 psi | 85% | 2543 fps | 96.4% |
| Accurate 4064 | <<locked>> | 92% | 53,142 psi | 85% | 2592 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,214 psi | 84% | 2661 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 88% | 54,114 psi | 87% | 2621 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 55,158 psi | 88% | 2621 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,185 psi | 85% | 2575 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 53,809 psi | 86% | 2556 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,056 psi | 88% | 2674 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,403 psi | 86% | 2726 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,607 psi | 88% | 2638 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,013 psi | 88% | 2530 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,332 psi | 89% | 2657 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,865 psi | 82% | 2667 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,230 psi | 89% | 2753 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,969 psi | 58% | 2415 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,856 psi | 64% | 2552 fps | 96.6% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,635 psi | 86% | 2635 fps | 99.5% |
| Bofors RP3 | <<locked>> | 94% | 55,347 psi | 89% | 2657 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,637 psi | 89% | 2625 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,216 psi | 89% | 2562 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,753 psi | 89% | 2651 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,128 psi | 87% | 2694 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 53,795 psi | 86% | 2569 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,969 psi | 88% | 2598 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 52,852 psi | 85% | 2615 fps | 99.1% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 55,521 psi | 89% | 2710 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 96% | 53,011 psi | 85% | 2621 fps | 96% |
| Hodgdon H4895 | <<locked>> | 88% | 54,636 psi | 88% | 2631 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,818 psi | 75% | 2549 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,592 psi | 86% | 2661 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 52,750 psi | 85% | 2690 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,302 psi | 57% | 1568 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,014 psi | 90% | 2635 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 54,302 psi | 87% | 2612 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,520 psi | 87% | 2602 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,795 psi | 88% | 2582 fps | 97.6% |
| IMR 4198 | <<locked>> | 82% | 54,955 psi | 88% | 2487 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,228 psi | 84% | 2598 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,128 psi | 87% | 2605 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,501 psi | 79% | 2605 fps | 99.1% |
| IMR 4895 | <<locked>> | 90% | 53,476 psi | 86% | 2641 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 53,185 psi | 85% | 2575 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,345 psi | 86% | 2562 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,519 psi | 86% | 2598 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,070 psi | 87% | 2556 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 54,346 psi | 87% | 2602 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 53,316 psi | 85% | 2598 fps | 98.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,882 psi | 86% | 2628 fps | 97.7% |
| Norma 201 | <<locked>> | 90% | 56,188 psi | 90% | 2615 fps | 100% |
| Norma 202 | <<locked>> | 88% | 53,403 psi | 86% | 2575 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,491 psi | 87% | 2648 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 51,488 psi | 83% | 2648 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 92% | 54,882 psi | 88% | 2671 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,560 psi | 81% | 2644 fps | 97.8% |
| Ramshot TAC | <<locked>> | 86% | 53,563 psi | 86% | 2595 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,011 psi | 85% | 2612 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,404 psi | 87% | 2582 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,694 psi | 57% | 1608 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,275 psi | 90% | 2605 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,403 psi | 86% | 2598 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,666 psi | 89% | 2723 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,897 psi | 88% | 2749 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,590 psi | 83% | 2677 fps | 99.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,011 psi | 83% | 2703 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 86% | 54,070 psi | 87% | 2556 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,287 psi | 85% | 2569 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,926 psi | 88% | 2644 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 55,637 psi | 89% | 2625 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,316 psi | 85% | 2598 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,519 psi | 86% | 2598 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,346 psi | 87% | 2602 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,882 psi | 86% | 2628 fps | 97.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,043 psi | 90% | 2579 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,084 psi | 85% | 2651 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,883 psi | 90% | 2549 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,492 psi | 89% | 2625 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,840 psi | 90% | 2641 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,853 psi | 88% | 2516 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,650 psi | 88% | 2516 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,809 psi | 86% | 2556 fps | 97.4% |
| Somchem S321 | <<locked>> | 84% | 54,346 psi | 87% | 2608 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,969 psi | 87% | 2513 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,766 psi | 88% | 2612 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 55,230 psi | 89% | 2641 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,122 psi | 74% | 2605 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,679 psi | 88% | 2484 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,955 psi | 88% | 2503 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,275 psi | 90% | 2579 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,693 psi | 86% | 2552 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 53,447 psi | 86% | 2579 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,186 psi | 87% | 2648 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 86% | 53,664 psi | 86% | 2575 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,347 psi | 89% | 2595 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,185 psi | 85% | 2654 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,841 psi | 62% | 2487 fps | 97.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,810 psi | 88% | 2631 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 53,374 psi | 86% | 2621 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,521 psi | 89% | 2710 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,184 psi | 52% | 2398 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,825 psi | 90% | 2654 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% | 45,832 psi | 73% | 2402 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,140 psi | 80% | 2507 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,435 psi | 62% | 2333 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,150 psi | 72% | 2470 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 49,603 psi | 80% | 2493 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 36,347 psi | 58% | 2323 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 34,534 psi | 55% | 2352 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 42,105 psi | 68% | 2428 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 80% | 35,839 psi | 57% | 2290 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,135 psi | 71% | 2434 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 44,150 psi | 71% | 2428 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,532 psi | 83% | 2621 fps | 99.9% |
| Alliant Power Pro 2000-MR | 54 gr | 80% | 38,043 psi | 61% | 2448 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,288 psi | 57% | 2310 fps | 98.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,735 psi | 83% | 2487 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,913 psi | 61% | 2369 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,157 psi | 56% | 2362 fps | 95.8% |
| Alliant Reloder-17 | 53.2 gr | 80% | 30,414 psi | 49% | 2274 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,124 psi | 48% | 2270 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,159 psi | 60% | 2493 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,176 psi | 66% | 2431 fps | 97.7% |
| Bofors RP3 | <<locked>> | 80% | 34,780 psi | 56% | 2313 fps | 98.1% |
| Bofors RP7 | <<locked>> | 92% | 46,311 psi | 74% | 2480 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,209 psi | 74% | 2431 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,627 psi | 68% | 2454 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,934 psi | 75% | 2585 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 80% | 50,604 psi | 81% | 2526 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,329 psi | 82% | 2549 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 35,650 psi | 57% | 2313 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 92% | 42,743 psi | 69% | 2503 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 94% | 49,937 psi | 80% | 2575 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 42,482 psi | 68% | 2438 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,342 psi | 49% | 2221 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,392 psi | 62% | 2411 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 94% | 45,803 psi | 73% | 2572 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,223 psi | 42% | 1401 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,930 psi | 66% | 2395 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 41,887 psi | 67% | 2434 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,608 psi | 60% | 2320 fps | 97.4% |
| IMR 4166 Enduron | <<locked>> | 84% | 45,600 psi | 73% | 2438 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 51,924 psi | 83% | 2451 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 46,006 psi | 74% | 2500 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,281 psi | 73% | 2461 fps | 95.5% |
| IMR 4831 | <<locked>> | 88% | 33,518 psi | 54% | 2310 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 38,827 psi | 62% | 2395 fps | 98.2% |
| IMR 8208 XBR | <<locked>> | 80% | 44,135 psi | 71% | 2434 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 49,763 psi | 80% | 2513 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,046 psi | 66% | 2411 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,409 psi | 68% | 2372 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 37,405 psi | 60% | 2326 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 39,363 psi | 63% | 2365 fps | 95.5% |
| Lovex S070 | <<locked>> | 92% | 42,134 psi | 68% | 2434 fps | 95% |
| Norma 201 | <<locked>> | 80% | 41,321 psi | 66% | 2385 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 41,553 psi | 67% | 2395 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,304 psi | 60% | 2356 fps | 97.8% |
| Norma URP | <<locked>> | 88% | 35,099 psi | 56% | 2352 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 36,637 psi | 59% | 2365 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 94% | 41,568 psi | 67% | 2490 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 44,077 psi | 71% | 2441 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,366 psi | 70% | 2461 fps | 98.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,601 psi | 76% | 2480 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,469 psi | 42% | 1434 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,530 psi | 79% | 2513 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,249 psi | 66% | 2398 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,537 psi | 63% | 2461 fps | 97.8% |
| ReloadSwiss RS 60 | 53.2 gr | 80% | 32,358 psi | 52% | 2336 fps | 98.8% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,476 psi | 55% | 2369 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,318 psi | 60% | 2428 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 45,324 psi | 73% | 2425 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,378 psi | 63% | 2343 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 32,779 psi | 53% | 2264 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 92% | 46,311 psi | 74% | 2480 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,363 psi | 63% | 2365 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,046 psi | 66% | 2411 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,405 psi | 60% | 2326 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 42,134 psi | 68% | 2434 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,228 psi | 84% | 2530 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,721 psi | 54% | 2306 fps | 96.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,518 psi | 84% | 2507 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,148 psi | 68% | 2415 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,683 psi | 65% | 2402 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,902 psi | 69% | 2346 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,520 psi | 57% | 2228 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 44,179 psi | 71% | 2411 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 47,645 psi | 76% | 2510 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,322 psi | 68% | 2346 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,959 psi | 67% | 2415 fps | 98.6% |
| Somchem S355 | <<locked>> | 80% | 33,663 psi | 54% | 2267 fps | 97.2% |
| Somchem S365 | <<locked>> | 82% | 25,947 psi | 42% | 2156 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 48,515 psi | 78% | 2402 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,149 psi | 69% | 2343 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,711 psi | 62% | 2329 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,349 psi | 63% | 2336 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,024 psi | 51% | 2215 fps | 98% |
| Vihtavuori N160 | <<locked>> | 86% | 34,418 psi | 55% | 2306 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 44,251 psi | 71% | 2434 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 37,739 psi | 61% | 2326 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 36,027 psi | 58% | 2356 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 94% | 31,952 psi | 51% | 2336 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,472 psi | 49% | 2192 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 43,584 psi | 70% | 2474 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 42,743 psi | 69% | 2503 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,255 psi | 49% | 2339 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,001 psi | 64% | 2405 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 104 powders for .338 Win Mag. loaded with the .338 | 224gr | TWENTY-NINE ERTP. 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 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 52–90 %, leaving at least 10 % headroom. The 224.0 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .338 Win Mag. with the .338 | 224gr | TWENTY-NINE ERTP 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.