Load Specifications
Bullet Manufacturer:Lapua
Bullet Weight:231 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:1:14.5
Load data in caliber .338 Blaser Mag. with .338 | 231gr | Lapua Naturalis bullet and 103 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 70 and Alliant Reloder-16.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 86% | 54,012 psi | 89% | 2608 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,272 psi | 87% | 2631 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,976 psi | 74% | 2598 fps | 98.5% |
| Accurate 4064 | <<locked>> | 88% | 54,447 psi | 89% | 2661 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,824 psi | 90% | 2762 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 54,534 psi | 90% | 2694 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 52,475 psi | 86% | 2654 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,852 psi | 87% | 2749 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,592 psi | 88% | 2644 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,781 psi | 90% | 2612 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,491 psi | 89% | 2815 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 52,562 psi | 86% | 2671 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 52,953 psi | 87% | 2690 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 52,417 psi | 86% | 2766 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,432 psi | 88% | 2792 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,822 psi | 85% | 2736 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 45,324 psi | 74% | 2674 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,656 psi | 70% | 2625 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,449 psi | 61% | 2539 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,167 psi | 79% | 2795 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,389 psi | 89% | 2713 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 53,026 psi | 87% | 2684 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 45,324 psi | 74% | 2674 fps | 96.4% |
| Bofors RP7 | <<locked>> | 92% | 53,084 psi | 87% | 2667 fps | 98.5% |
| Hodgdon BL-C2 | <<locked>> | 82% | 52,924 psi | 87% | 2674 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,867 psi | 88% | 2703 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 53,896 psi | 88% | 2762 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 92% | 54,462 psi | 89% | 2726 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 84% | 55,100 psi | 90% | 2700 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 52,417 psi | 86% | 2694 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,940 psi | 90% | 2736 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,114 psi | 89% | 2799 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,853 psi | 59% | 1637 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 52,881 psi | 87% | 2657 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 51,982 psi | 85% | 2631 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 52,011 psi | 85% | 2635 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,839 psi | 90% | 2667 fps | 99.1% |
| IMR 4350 | <<locked>> | 96% | 53,650 psi | 88% | 2700 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,911 psi | 90% | 2697 fps | 99.1% |
| IMR 4831 | <<locked>> | 96% | 51,764 psi | 85% | 2703 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 54,346 psi | 89% | 2720 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 52,649 psi | 86% | 2680 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 82% | 53,592 psi | 88% | 2644 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,447 psi | 89% | 2667 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,056 psi | 89% | 2625 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,013 psi | 90% | 2671 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,389 psi | 89% | 2690 fps | 99.7% |
| Lovex S070 | <<locked>> | 94% | 51,967 psi | 85% | 2677 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,144 psi | 61% | 2454 fps | 96.7% |
| Norma 201 | <<locked>> | 84% | 53,229 psi | 87% | 2638 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,867 psi | 88% | 2638 fps | 100% |
| Norma 203B | <<locked>> | 86% | 52,185 psi | 86% | 2680 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,230 psi | 89% | 2749 fps | 97.8% |
| Norma MRPᴾ | <<locked>> | 100% | 47,877 psi | 79% | 2756 fps | 98.3% |
| Norma URP | <<locked>> | 96% | 53,780 psi | 88% | 2749 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 52,692 psi | 87% | 2703 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 52,634 psi | 86% | 2749 fps | 99.5% |
| Ramshot TAC | <<locked>> | 82% | 53,635 psi | 88% | 2671 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,432 psi | 88% | 2684 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,230 psi | 59% | 1673 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,099 psi | 89% | 2687 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,722 psi | 88% | 2759 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 53,200 psi | 87% | 2789 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,433 psi | 89% | 2782 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,766 psi | 88% | 2815 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 54,143 psi | 89% | 2615 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,925 psi | 89% | 2641 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 52,881 psi | 87% | 2677 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 54,795 psi | 90% | 2720 fps | 96.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,836 psi | 83% | 2720 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 92% | 53,084 psi | 87% | 2667 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,389 psi | 89% | 2690 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,447 psi | 89% | 2667 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,013 psi | 90% | 2671 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 51,967 psi | 85% | 2677 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,810 psi | 90% | 2740 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 52,156 psi | 86% | 2651 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,156 psi | 87% | 2671 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,679 psi | 90% | 2575 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 51,909 psi | 85% | 2536 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,331 psi | 89% | 2644 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,357 psi | 83% | 2717 fps | 97.5% |
| Somchem S335 | <<locked>> | 84% | 54,056 psi | 89% | 2572 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 51,924 psi | 85% | 2638 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 53,229 psi | 87% | 2677 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 52,040 psi | 85% | 2746 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,329 psi | 84% | 2697 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 84% | 55,100 psi | 90% | 2559 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,954 psi | 89% | 2598 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,491 psi | 89% | 2618 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,694 psi | 90% | 2654 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 52,692 psi | 87% | 2694 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 44,179 psi | 73% | 2566 fps | 96.4% |
| Vihtavuori N530 | <<locked>> | 82% | 53,838 psi | 88% | 2641 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 52,634 psi | 86% | 2618 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 51,648 psi | 85% | 2700 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,485 psi | 78% | 2697 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 52,620 psi | 86% | 2671 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,201 psi | 89% | 2690 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,128 psi | 89% | 2766 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,145 psi | 63% | 2657 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 52,968 psi | 87% | 2677 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 48,167 psi | 79% | 2638 fps | 96.7% |
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% | 44,324 psi | 73% | 2474 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,671 psi | 72% | 2474 fps | 96.5% |
| Accurate 3100 | <<locked>> | 92% | 33,953 psi | 56% | 2385 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 41,989 psi | 69% | 2480 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,154 psi | 51% | 2333 fps | 96.5% |
| ADI AR 2206H | <<locked>> | 80% | 48,080 psi | 79% | 2595 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 40,915 psi | 67% | 2461 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 43,424 psi | 71% | 2585 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,256 psi | 83% | 2595 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,343 psi | 84% | 2569 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,121 psi | 72% | 2648 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,654 psi | 67% | 2480 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,671 psi | 72% | 2543 fps | 99.7% |
| Alliant Reloder-16 | 57.3 gr | 80% | 31,575 psi | 52% | 2352 fps | 96.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,259 psi | 58% | 2470 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 42,743 psi | 70% | 2579 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 42,424 psi | 70% | 2618 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 84% | 25,657 psi | 42% | 2215 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,040 psi | 54% | 2428 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 88% | 31,212 psi | 51% | 2431 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,630 psi | 78% | 2612 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 40,350 psi | 66% | 2484 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 42,424 psi | 70% | 2618 fps | 95.5% |
| Bofors RP7 | <<locked>> | 82% | 38,696 psi | 64% | 2415 fps | 95.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,371 psi | 81% | 2621 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,220 psi | 68% | 2493 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 36,027 psi | 59% | 2438 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 84% | 41,945 psi | 69% | 2513 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 48,588 psi | 80% | 2605 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,935 psi | 48% | 2254 fps | 97.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,802 psi | 74% | 2589 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 37,782 psi | 62% | 2503 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,614 psi | 44% | 1460 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,586 psi | 76% | 2559 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 48,704 psi | 80% | 2585 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,975 psi | 71% | 2490 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,411 psi | 75% | 2516 fps | 97.6% |
| IMR 4350 | <<locked>> | 86% | 39,117 psi | 64% | 2448 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 37,797 psi | 62% | 2395 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 30,313 psi | 50% | 2297 fps | 96.2% |
| IMR 4895 | <<locked>> | 80% | 44,773 psi | 74% | 2569 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 98% | 49,371 psi | 81% | 2631 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 50,256 psi | 83% | 2595 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,601 psi | 78% | 2572 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,747 psi | 78% | 2530 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 42,830 psi | 70% | 2487 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,099 psi | 58% | 2346 fps | 96.3% |
| Lovex S070 | <<locked>> | 82% | 35,491 psi | 58% | 2372 fps | 95.2% |
| Lovex S071 | <<locked>> | 96% | 32,518 psi | 53% | 2356 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 46,876 psi | 77% | 2543 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,427 psi | 78% | 2546 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,018 psi | 71% | 2530 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 44,077 psi | 72% | 2582 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 36,448 psi | 60% | 2523 fps | 95% |
| Norma URP | <<locked>> | 80% | 31,662 psi | 52% | 2339 fps | 96.5% |
| Ramshot Big Game | <<locked>> | 80% | 42,830 psi | 70% | 2549 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 35,244 psi | 58% | 2431 fps | 95.9% |
| Ramshot TAC | <<locked>> | 80% | 50,140 psi | 82% | 2618 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,893 psi | 82% | 2631 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,021 psi | 44% | 1496 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,611 psi | 68% | 2480 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,586 psi | 76% | 2648 fps | 99.9% |
| ReloadSwiss RS 60 | 61.7 gr | 80% | 37,608 psi | 62% | 2526 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,951 psi | 51% | 2349 fps | 96% |
| ReloadSwiss RS 70 | 64.2 gr | 82% | 33,083 psi | 54% | 2411 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 80% | 50,937 psi | 84% | 2572 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,657 psi | 73% | 2500 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,072 psi | 63% | 2434 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 96% | 48,138 psi | 79% | 2618 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 94% | 41,481 psi | 68% | 2559 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 82% | 38,696 psi | 64% | 2415 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,099 psi | 58% | 2346 fps | 96.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,601 psi | 78% | 2572 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,830 psi | 70% | 2487 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 35,491 psi | 58% | 2372 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,189 psi | 64% | 2487 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,602 psi | 80% | 2595 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,557 psi | 76% | 2569 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,211 psi | 79% | 2487 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,335 psi | 66% | 2365 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 36,680 psi | 60% | 2343 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 41,104 psi | 67% | 2552 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 47,761 psi | 78% | 2487 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,472 psi | 80% | 2589 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 38,711 psi | 64% | 2438 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 28,268 psi | 46% | 2293 fps | 98.5% |
| Somchem S385 | <<locked>> | 92% | 39,421 psi | 65% | 2490 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 48,718 psi | 80% | 2477 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,527 psi | 73% | 2470 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,078 psi | 74% | 2487 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,985 psi | 61% | 2375 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 32,967 psi | 54% | 2339 fps | 96.9% |
| Vihtavuori N165 | <<locked>> | 98% | 41,278 psi | 68% | 2513 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 50,372 psi | 83% | 2592 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,352 psi | 71% | 2480 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,445 psi | 53% | 2339 fps | 96.5% |
| Vihtavuori N555 | <<locked>> | 84% | 27,557 psi | 45% | 2283 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,605 psi | 54% | 2320 fps | 98.7% |
| Winchester 748 | <<locked>> | 80% | 50,720 psi | 83% | 2641 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 36,027 psi | 59% | 2438 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,628 psi | 42% | 2290 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,238 psi | 76% | 2575 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 41,930 psi | 69% | 2530 fps | 95% |
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 103 powders for .338 Blaser Mag. loaded with the .338 | 231gr | Lapua Naturalis. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,815 fps; across all powders the maximum-charge window runs from 1,637 fps to 2,815 fps. Accurate 3100 gives the best case fill at 100 %, and 103 of the 103 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 231.0 gr projectile in 0.338" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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, ReloadSwiss RS 70, Alliant Reloder-16 rank at the top here: for .338 Blaser Mag. with the .338 | 231gr | Lapua Naturalis 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.