Load Specifications
Bullet:.338 | 250gr | Lapua Scenar
Bullet Manufacturer:Lapua
Bullet Weight:250 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338 Blaser Mag. load data
Case Length (l3):2.5078"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:92.6 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:25.6"
Max. allowed Pressure:60,916 psi
Recommended Twist Rate:1:12.5
Load data in caliber .338 Blaser Mag. with .338 | 250gr | Lapua Scenar bullet and 102 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance 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.
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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 53,534 psi | 88% | 2474 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 51,866 psi | 85% | 2493 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,732 psi | 78% | 2526 fps | 99.3% |
| Accurate 4064 | <<locked>> | 86% | 53,838 psi | 88% | 2523 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 53,664 psi | 88% | 2621 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 53,330 psi | 88% | 2549 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 54,346 psi | 89% | 2556 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,071 psi | 90% | 2661 fps | 98.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 49,226 psi | 81% | 2598 fps | 96.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 53,185 psi | 87% | 2671 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,810 psi | 90% | 2575 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 51,851 psi | 85% | 2552 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,694 psi | 90% | 2671 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 52,127 psi | 86% | 2648 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 54,114 psi | 89% | 2651 fps | 98.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 47,500 psi | 78% | 2598 fps | 97.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,802 psi | 74% | 2546 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,436 psi | 65% | 2474 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,734 psi | 83% | 2717 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 52,997 psi | 87% | 2569 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 43,729 psi | 72% | 2533 fps | 96.5% |
| Bofors RP3 | <<locked>> | 86% | 52,069 psi | 85% | 2546 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 47,500 psi | 78% | 2598 fps | 97.5% |
| Bofors RP7 | <<locked>> | 92% | 55,071 psi | 90% | 2575 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 86% | 52,562 psi | 86% | 2559 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 52,620 psi | 86% | 2621 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 90% | 53,011 psi | 87% | 2582 fps | 98.5% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 52,852 psi | 87% | 2605 fps | 96.3% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 51,634 psi | 85% | 2585 fps | 96% |
| Hodgdon H4895 | <<locked>> | 82% | 53,882 psi | 88% | 2559 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,737 psi | 90% | 2598 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 53,563 psi | 88% | 2592 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 52,634 psi | 86% | 2657 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,187 psi | 59% | 1558 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,882 psi | 90% | 2559 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 54,491 psi | 89% | 2536 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 53,795 psi | 88% | 2536 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 53,403 psi | 88% | 2526 fps | 99.3% |
| IMR 4350 | <<locked>> | 94% | 52,402 psi | 86% | 2559 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 53,606 psi | 88% | 2556 fps | 99.2% |
| IMR 4831 | <<locked>> | 96% | 54,201 psi | 89% | 2615 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 53,156 psi | 87% | 2575 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 54,723 psi | 90% | 2595 fps | 96.9% |
| Lovex D073.6 | <<locked>> | 82% | 53,461 psi | 88% | 2526 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 52,489 psi | 86% | 2480 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,027 psi | 89% | 2533 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 53,243 psi | 87% | 2552 fps | 99.8% |
| Lovex S070 | <<locked>> | 94% | 54,288 psi | 89% | 2589 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,581 psi | 65% | 2392 fps | 98% |
| Norma 201 | <<locked>> | 82% | 52,301 psi | 86% | 2500 fps | 100% |
| Norma 202 | <<locked>> | 82% | 52,837 psi | 87% | 2497 fps | 100% |
| Norma 203B | <<locked>> | 86% | 54,418 psi | 89% | 2585 fps | 100% |
| Norma 204 | <<locked>> | 94% | 52,707 psi | 87% | 2605 fps | 98% |
| Norma MRPᴾ | <<locked>> | 100% | 50,241 psi | 82% | 2674 fps | 99.1% |
| Norma URP | <<locked>> | 94% | 52,634 psi | 86% | 2608 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 51,532 psi | 85% | 2566 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,708 psi | 90% | 2657 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 41,452 psi | 68% | 2470 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,666 psi | 60% | 1594 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 52,794 psi | 87% | 2549 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 52,388 psi | 86% | 2612 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 52,011 psi | 85% | 2644 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 53,417 psi | 88% | 2644 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 52,170 psi | 86% | 2671 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 38,087 psi | 63% | 2477 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 84% | 52,837 psi | 87% | 2500 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 52,214 psi | 86% | 2543 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 53,447 psi | 88% | 2585 fps | 97.2% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,982 psi | 87% | 2635 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 92% | 55,071 psi | 90% | 2575 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 53,243 psi | 87% | 2552 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 53,461 psi | 88% | 2526 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,027 psi | 89% | 2533 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 54,288 psi | 89% | 2589 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 53,447 psi | 88% | 2595 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,259 psi | 89% | 2556 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,056 psi | 90% | 2572 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 53,359 psi | 88% | 2434 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,882 psi | 88% | 2438 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 53,171 psi | 87% | 2510 fps | 99.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,489 psi | 86% | 2631 fps | 98.4% |
| Somchem S335 | <<locked>> | 82% | 53,011 psi | 87% | 2434 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,983 psi | 89% | 2543 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 52,359 psi | 86% | 2539 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 54,969 psi | 90% | 2575 fps | 96.6% |
| Somchem S365 | <<locked>> | 98% | 54,853 psi | 90% | 2654 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,722 psi | 88% | 2615 fps | 99% |
| Vihtavuori N133 | <<locked>> | 82% | 53,809 psi | 88% | 2418 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 52,881 psi | 87% | 2461 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 53,330 psi | 88% | 2477 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 53,345 psi | 88% | 2513 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,853 psi | 90% | 2602 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,427 psi | 76% | 2493 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 86% | 54,665 psi | 90% | 2520 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 54,041 psi | 89% | 2612 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,125 psi | 82% | 2615 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 50,923 psi | 84% | 2664 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,679 psi | 90% | 2575 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 52,866 psi | 87% | 2625 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,190 psi | 66% | 2589 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 55,114 psi | 90% | 2579 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 50,459 psi | 83% | 2559 fps | 97.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 47,195 psi | 77% | 2392 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,600 psi | 75% | 2395 fps | 97.5% |
| Accurate 3100 | <<locked>> | 88% | 31,749 psi | 52% | 2231 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 44,672 psi | 73% | 2398 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,373 psi | 55% | 2277 fps | 97.9% |
| ADI AR 2206H | <<locked>> | 80% | 50,125 psi | 82% | 2503 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,728 psi | 70% | 2379 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 39,972 psi | 66% | 2408 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 98% | 46,137 psi | 76% | 2546 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,282 psi | 76% | 2566 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,772 psi | 70% | 2398 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,716 psi | 75% | 2457 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,170 psi | 54% | 2287 fps | 98% |
| Alliant Reloder-17 | 59 gr | 80% | 37,231 psi | 61% | 2398 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 39,421 psi | 65% | 2402 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 39,262 psi | 64% | 2444 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 24,236 psi | 40% | 2070 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 92% | 30,864 psi | 51% | 2270 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 84% | 28,979 psi | 48% | 2267 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,632 psi | 81% | 2523 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 41,060 psi | 67% | 2480 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 42,728 psi | 70% | 2408 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 39,262 psi | 64% | 2444 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 38,145 psi | 63% | 2293 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 43,221 psi | 71% | 2415 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 35,505 psi | 58% | 2320 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 38,566 psi | 63% | 2336 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 98% | 49,516 psi | 81% | 2552 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 98% | 48,370 psi | 79% | 2533 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 50,633 psi | 83% | 2513 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,734 psi | 50% | 2195 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,934 psi | 77% | 2497 fps | 100% |
| Hodgdon Superformance | 63.9 gr | 82% | 36,999 psi | 61% | 2379 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 44% | 1388 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,443 psi | 80% | 2467 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 50,981 psi | 84% | 2490 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,904 psi | 74% | 2405 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,195 psi | 77% | 2431 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 36,071 psi | 59% | 2277 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,421 psi | 65% | 2320 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 32,271 psi | 53% | 2238 fps | 97.6% |
| IMR 4895 | <<locked>> | 80% | 46,847 psi | 77% | 2484 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 48,356 psi | 79% | 2500 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 80% | 49,937 psi | 82% | 2480 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,588 psi | 81% | 2438 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,976 psi | 74% | 2405 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,043 psi | 61% | 2277 fps | 97.5% |
| Lovex S070 | <<locked>> | 80% | 35,244 psi | 58% | 2260 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 30,690 psi | 50% | 2208 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 49,139 psi | 81% | 2454 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,647 psi | 82% | 2454 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,063 psi | 74% | 2448 fps | 100% |
| Norma 204 | <<locked>> | 86% | 40,393 psi | 66% | 2398 fps | 95.2% |
| Norma MRP | <<locked>> | 90% | 35,998 psi | 59% | 2405 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 33,547 psi | 55% | 2274 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 80% | 45,034 psi | 74% | 2467 fps | 100% |
| Ramshot Hunter | <<locked>> | 80% | 32,503 psi | 53% | 2260 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 98% | 38,609 psi | 63% | 2415 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,412 psi | 45% | 1424 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,511 psi | 71% | 2402 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,820 psi | 80% | 2559 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,610 psi | 65% | 2448 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,025 psi | 54% | 2293 fps | 97.5% |
| ReloadSwiss RS 70 | 59.9 gr | 80% | 32,648 psi | 54% | 2297 fps | 96.7% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 35,607 psi | 58% | 2418 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 46,818 psi | 77% | 2415 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,277 psi | 66% | 2359 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 44,121 psi | 72% | 2434 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 90% | 38,334 psi | 63% | 2385 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 38,145 psi | 63% | 2293 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,043 psi | 61% | 2277 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,937 psi | 82% | 2480 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,976 psi | 74% | 2405 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 35,244 psi | 58% | 2260 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,147 psi | 68% | 2405 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,763 psi | 83% | 2507 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,486 psi | 80% | 2480 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,256 psi | 83% | 2395 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,235 psi | 69% | 2280 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 36,114 psi | 59% | 2224 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 40,350 psi | 66% | 2428 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 49,821 psi | 82% | 2395 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,502 psi | 83% | 2497 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,857 psi | 67% | 2359 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 48,182 psi | 79% | 2477 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 30,110 psi | 49% | 2238 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 36,477 psi | 60% | 2323 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 50,734 psi | 83% | 2379 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,833 psi | 77% | 2382 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,021 psi | 77% | 2395 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,885 psi | 64% | 2297 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 34,896 psi | 57% | 2274 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 94% | 38,130 psi | 63% | 2346 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 45,266 psi | 74% | 2392 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,316 psi | 56% | 2277 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 26,049 psi | 43% | 2139 fps | 95.7% |
| Vihtavuori N560 | <<locked>> | 98% | 47,587 psi | 78% | 2608 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,258 psi | 56% | 2251 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 35,505 psi | 58% | 2320 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 24,062 psi | 40% | 2139 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,414 psi | 79% | 2487 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 40,973 psi | 67% | 2402 fps | 95.5% |
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 102 powders for .338 Blaser Mag. loaded with the .338 | 250gr | Lapua Scenar. Alliant Reloder-26 delivers the highest muzzle velocity at 2,717 fps; across all powders the maximum-charge window runs from 1,558 fps to 2,717 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, ADI AR 2213 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 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .338 Blaser Mag. with the .338 | 250gr | Lapua Scenar 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.