Load Specifications
Bullet:.338 | 225gr | Frontier BTSP
Bullet Manufacturer:Frontier Bullets
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:1:11.0
Load data in caliber .338 Win Mag. with .338 | 225gr | Frontier BTSP 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% | 55,129 psi | 88% | 2520 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,621 psi | 86% | 2549 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,316 psi | 85% | 2543 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,201 psi | 89% | 2605 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,040 psi | 85% | 2539 fps | 96.5% |
| Accurate 4064 | <<locked>> | 92% | 53,084 psi | 85% | 2585 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,156 psi | 84% | 2654 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 88% | 54,273 psi | 87% | 2618 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 55,085 psi | 88% | 2615 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,359 psi | 86% | 2572 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 53,708 psi | 86% | 2549 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,187 psi | 88% | 2671 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,374 psi | 86% | 2723 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,839 psi | 88% | 2635 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,868 psi | 88% | 2523 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,550 psi | 89% | 2654 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,778 psi | 81% | 2657 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,245 psi | 89% | 2746 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,158 psi | 58% | 2415 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,856 psi | 64% | 2549 fps | 96.7% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,824 psi | 86% | 2631 fps | 99.5% |
| Bofors RP3 | <<locked>> | 94% | 55,259 psi | 89% | 2651 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,593 psi | 89% | 2615 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,347 psi | 89% | 2556 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,956 psi | 90% | 2648 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,070 psi | 87% | 2687 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 53,983 psi | 87% | 2562 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,882 psi | 88% | 2589 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 56,420 psi | 90% | 2661 fps | 99.4% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 55,535 psi | 89% | 2703 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 96% | 53,185 psi | 85% | 2621 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 88% | 54,824 psi | 88% | 2628 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,978 psi | 75% | 2546 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,751 psi | 86% | 2657 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 52,750 psi | 85% | 2684 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,215 psi | 56% | 1565 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,898 psi | 90% | 2628 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 54,462 psi | 87% | 2608 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,679 psi | 88% | 2598 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,984 psi | 88% | 2582 fps | 97.6% |
| IMR 4198 | <<locked>> | 82% | 55,027 psi | 88% | 2484 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,228 psi | 84% | 2592 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,317 psi | 87% | 2602 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,501 psi | 79% | 2598 fps | 99.1% |
| IMR 4895 | <<locked>> | 90% | 53,359 psi | 86% | 2635 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 53,359 psi | 86% | 2572 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,272 psi | 85% | 2556 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,432 psi | 86% | 2592 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,969 psi | 87% | 2549 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 54,273 psi | 87% | 2595 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 53,229 psi | 85% | 2592 fps | 98.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,157 psi | 87% | 2625 fps | 97.8% |
| Norma 201 | <<locked>> | 90% | 56,362 psi | 90% | 2612 fps | 100% |
| Norma 202 | <<locked>> | 88% | 53,272 psi | 85% | 2566 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,708 psi | 88% | 2644 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 51,750 psi | 83% | 2648 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 92% | 55,100 psi | 88% | 2667 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,531 psi | 81% | 2638 fps | 97.8% |
| Ramshot TAC | <<locked>> | 86% | 53,476 psi | 86% | 2589 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 86% | 52,953 psi | 85% | 2605 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,288 psi | 87% | 2575 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,607 psi | 57% | 1601 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 52,939 psi | 85% | 2552 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,330 psi | 86% | 2595 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,883 psi | 90% | 2717 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,172 psi | 88% | 2749 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,909 psi | 83% | 2677 fps | 99.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,243 psi | 84% | 2700 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 86% | 54,201 psi | 87% | 2549 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,476 psi | 86% | 2562 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,114 psi | 88% | 2641 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 55,593 psi | 89% | 2615 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,229 psi | 85% | 2592 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,432 psi | 86% | 2592 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,273 psi | 87% | 2595 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,157 psi | 87% | 2625 fps | 97.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,912 psi | 90% | 2572 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,301 psi | 85% | 2651 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,738 psi | 89% | 2543 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,405 psi | 89% | 2618 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,057 psi | 90% | 2638 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,679 psi | 88% | 2510 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,549 psi | 87% | 2507 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,722 psi | 86% | 2549 fps | 97.4% |
| Somchem S321 | <<locked>> | 84% | 54,520 psi | 87% | 2605 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,896 psi | 86% | 2510 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,969 psi | 88% | 2608 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 55,477 psi | 89% | 2638 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,079 psi | 74% | 2598 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,491 psi | 87% | 2474 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,795 psi | 88% | 2493 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,173 psi | 90% | 2572 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,896 psi | 86% | 2549 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 53,606 psi | 86% | 2575 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,143 psi | 87% | 2641 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 86% | 53,824 psi | 86% | 2572 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,288 psi | 89% | 2589 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,156 psi | 85% | 2648 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,798 psi | 62% | 2484 fps | 97.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,042 psi | 88% | 2628 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 53,258 psi | 85% | 2615 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,782 psi | 89% | 2710 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,169 psi | 52% | 2395 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,753 psi | 89% | 2644 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% | 45,948 psi | 74% | 2398 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,009 psi | 80% | 2500 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,537 psi | 62% | 2329 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,078 psi | 72% | 2464 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 46,702 psi | 75% | 2441 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 36,463 psi | 58% | 2323 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 34,650 psi | 56% | 2349 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 42,221 psi | 68% | 2425 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 35,926 psi | 58% | 2287 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,295 psi | 71% | 2431 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 44,019 psi | 71% | 2421 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,648 psi | 83% | 2618 fps | 100% |
| Alliant Power Pro 2000-MR | 53.9 gr | 80% | 38,145 psi | 61% | 2444 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,389 psi | 57% | 2306 fps | 98.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,590 psi | 83% | 2480 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,029 psi | 61% | 2365 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,257 psi | 53% | 2310 fps | 95% |
| Alliant Reloder-17 | 53.1 gr | 80% | 30,487 psi | 49% | 2270 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,211 psi | 48% | 2267 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,144 psi | 60% | 2487 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,104 psi | 66% | 2425 fps | 97.7% |
| Bofors RP3 | <<locked>> | 80% | 34,722 psi | 56% | 2306 fps | 98.1% |
| Bofors RP7 | <<locked>> | 92% | 46,253 psi | 74% | 2474 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,050 psi | 74% | 2421 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,757 psi | 69% | 2451 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,108 psi | 76% | 2582 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 80% | 50,502 psi | 81% | 2516 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,459 psi | 83% | 2546 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 35,737 psi | 57% | 2310 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 92% | 42,699 psi | 68% | 2497 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 94% | 49,864 psi | 80% | 2569 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 42,583 psi | 68% | 2434 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,514 psi | 46% | 2169 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,522 psi | 62% | 2408 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 94% | 45,788 psi | 73% | 2569 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,121 psi | 42% | 1394 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,828 psi | 65% | 2388 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 42,003 psi | 67% | 2431 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,710 psi | 60% | 2316 fps | 97.4% |
| IMR 4166 Enduron | <<locked>> | 84% | 45,498 psi | 73% | 2431 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 52,025 psi | 83% | 2444 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 46,137 psi | 74% | 2493 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,179 psi | 72% | 2457 fps | 95.5% |
| IMR 4831 | <<locked>> | 88% | 33,605 psi | 54% | 2310 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 38,914 psi | 62% | 2392 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 44,295 psi | 71% | 2431 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 49,908 psi | 80% | 2510 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,959 psi | 66% | 2405 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,482 psi | 68% | 2365 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 37,507 psi | 60% | 2323 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 39,305 psi | 63% | 2359 fps | 95.5% |
| Lovex S070 | <<locked>> | 92% | 42,250 psi | 68% | 2434 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 41,408 psi | 66% | 2382 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 41,640 psi | 67% | 2392 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,391 psi | 60% | 2352 fps | 97.9% |
| Norma URP | <<locked>> | 88% | 35,056 psi | 56% | 2349 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 36,767 psi | 59% | 2362 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 94% | 41,727 psi | 67% | 2487 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 44,193 psi | 71% | 2438 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,526 psi | 70% | 2457 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,732 psi | 77% | 2477 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,571 psi | 43% | 1430 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,632 psi | 80% | 2507 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,365 psi | 66% | 2398 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,465 psi | 63% | 2454 fps | 97.9% |
| ReloadSwiss RS 60 | 53.1 gr | 80% | 32,474 psi | 52% | 2333 fps | 98.9% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,432 psi | 55% | 2362 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,289 psi | 60% | 2421 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 45,411 psi | 73% | 2421 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,479 psi | 63% | 2339 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 32,677 psi | 52% | 2257 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 92% | 46,253 psi | 74% | 2474 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,305 psi | 63% | 2359 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,959 psi | 66% | 2405 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,507 psi | 60% | 2323 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 42,250 psi | 68% | 2434 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,402 psi | 84% | 2526 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,649 psi | 54% | 2300 fps | 96.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,373 psi | 84% | 2500 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,308 psi | 68% | 2411 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,611 psi | 65% | 2395 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,772 psi | 69% | 2339 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,433 psi | 57% | 2218 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 44,135 psi | 71% | 2405 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 47,543 psi | 76% | 2503 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,467 psi | 68% | 2346 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,901 psi | 67% | 2408 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 33,750 psi | 54% | 2267 fps | 97.3% |
| Somchem S365 | <<locked>> | 82% | 26,020 psi | 42% | 2152 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 48,370 psi | 78% | 2395 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,033 psi | 69% | 2336 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,595 psi | 62% | 2323 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,247 psi | 63% | 2329 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,937 psi | 51% | 2208 fps | 98% |
| Vihtavuori N160 | <<locked>> | 86% | 34,505 psi | 55% | 2303 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 44,150 psi | 71% | 2428 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 37,869 psi | 61% | 2323 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 36,187 psi | 58% | 2356 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 94% | 32,082 psi | 51% | 2336 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,414 psi | 49% | 2185 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 43,700 psi | 70% | 2470 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 42,873 psi | 69% | 2503 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,240 psi | 48% | 2336 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,914 psi | 64% | 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 117 powders for .338 Win Mag. loaded with the .338 | 225gr | Frontier BTSP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,749 fps; across all powders the maximum-charge window runs from 1,565 fps to 2,749 fps. Accurate 3100 gives the best case fill at 100 %, and 117 of the 117 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 225.0 gr projectile in 0.338" calls for a 1:11.0 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 Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .338 Win Mag. with the .338 | 225gr | Frontier BTSP 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.