Load Specifications
Load data in caliber .338 Norma Mag. with .338 | 240gr | NorthFork Bonded Core bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Alliant Reloder-26.
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 2700 | <<locked>> | 82% | 56,043 psi | 88% | 2631 fps | 99.5% |
| Accurate 3100 | <<locked>> | 98% | 54,940 psi | 86% | 2687 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 55,869 psi | 88% | 2612 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,840 psi | 89% | 2723 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 57,145 psi | 90% | 2825 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 84% | 55,477 psi | 87% | 2644 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,537 psi | 90% | 2772 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 98% | 55,303 psi | 87% | 2772 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,058 psi | 60% | 2513 fps | 97.4% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,143 psi | 85% | 2717 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,143 psi | 85% | 2717 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,463 psi | 88% | 2664 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,637 psi | 89% | 2684 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,580 psi | 90% | 2772 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,158 psi | 86% | 2743 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,043 psi | 89% | 2759 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,636 psi | 86% | 2769 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,288 psi | 87% | 2743 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,892 psi | 75% | 2690 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,506 psi | 87% | 2828 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 57,653 psi | 90% | 2733 fps | 95.8% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,388 psi | 84% | 2749 fps | 99% |
| Bofors RP3 | <<locked>> | 84% | 57,406 psi | 90% | 2677 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,671 psi | 68% | 2618 fps | 96.6% |
| Bofors RP5 | <<locked>> | 98% | 54,636 psi | 86% | 2769 fps | 99.2% |
| Bofors RP7 | <<locked>> | 88% | 56,608 psi | 89% | 2677 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,456 psi | 74% | 2638 fps | 97.5% |
| Hodgdon H380 | <<locked>> | 84% | 57,653 psi | 90% | 2700 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,201 psi | 87% | 2723 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 54,592 psi | 86% | 2680 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 96% | 55,390 psi | 87% | 2717 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,302 psi | 85% | 2700 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,360 psi | 85% | 2651 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,891 psi | 73% | 2736 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 88% | 55,332 psi | 87% | 2759 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,680 psi | 57% | 1654 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,795 psi | 86% | 2625 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,145 psi | 90% | 2661 fps | 99.9% |
| IMR 4350 | <<locked>> | 92% | 57,740 psi | 90% | 2707 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,708 psi | 86% | 2648 fps | 99.7% |
| IMR 4831 | <<locked>> | 92% | 57,174 psi | 90% | 2713 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,666 psi | 89% | 2703 fps | 98% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,434 psi | 88% | 2802 fps | 98.6% |
| Lovex S062 | <<locked>> | 82% | 55,245 psi | 87% | 2618 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,926 psi | 86% | 2644 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 56,362 psi | 88% | 2690 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,950 psi | 77% | 2598 fps | 99.7% |
| Norma 203B | <<locked>> | 82% | 55,927 psi | 88% | 2671 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,969 psi | 86% | 2710 fps | 98.9% |
| Norma MRP | <<locked>> | 96% | 54,215 psi | 85% | 2792 fps | 99.8% |
| Norma URP | <<locked>> | 90% | 55,419 psi | 87% | 2707 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,811 psi | 89% | 2697 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,217 psi | 90% | 2822 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 90% | 54,157 psi | 85% | 2713 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,111 psi | 80% | 2703 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,507 psi | 59% | 1696 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,406 psi | 90% | 2687 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,505 psi | 85% | 2730 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,652 psi | 89% | 2743 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,100 psi | 86% | 2772 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,021 psi | 74% | 2733 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 82% | 57,116 psi | 90% | 2625 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,493 psi | 90% | 2674 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,593 psi | 87% | 2690 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 96% | 56,434 psi | 88% | 2749 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 88% | 56,608 psi | 89% | 2677 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,926 psi | 86% | 2644 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 55,245 psi | 87% | 2618 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,362 psi | 88% | 2690 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,550 psi | 87% | 2687 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,592 psi | 86% | 2516 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,447 psi | 85% | 2602 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,970 psi | 88% | 2746 fps | 99.3% |
| Somchem S355 | <<locked>> | 86% | 57,435 psi | 90% | 2671 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,334 psi | 90% | 2687 fps | 97.9% |
| Somchem S365 | <<locked>> | 92% | 55,114 psi | 86% | 2710 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,029 psi | 89% | 2723 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 82% | 57,624 psi | 90% | 2582 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,682 psi | 90% | 2598 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,984 psi | 86% | 2598 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,363 psi | 90% | 2700 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,173 psi | 88% | 2700 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 82% | 55,898 psi | 88% | 2598 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,579 psi | 89% | 2707 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,317 psi | 85% | 2723 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,375 psi | 85% | 2782 fps | 97.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,893 psi | 78% | 2697 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,000 psi | 89% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,201 psi | 87% | 2723 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,314 psi | 80% | 2815 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,942 psi | 89% | 2720 fps | 99.2% |
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 2700 | <<locked>> | 80% | 52,402 psi | 82% | 2579 fps | 99.2% |
| Accurate 3100 | <<locked>> | 80% | 29,907 psi | 47% | 2228 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 52,402 psi | 82% | 2566 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,524 psi | 64% | 2467 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 46,224 psi | 72% | 2651 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 49,037 psi | 77% | 2549 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 38,972 psi | 61% | 2451 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 90% | 42,250 psi | 66% | 2543 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 96% | 33,562 psi | 53% | 2398 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 39,088 psi | 61% | 2451 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 39,088 psi | 61% | 2451 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,864 psi | 78% | 2572 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,156 psi | 83% | 2638 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,073 psi | 61% | 2474 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,614 psi | 70% | 2589 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,696 psi | 61% | 2444 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 36,550 psi | 57% | 2441 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,834 psi | 45% | 2254 fps | 98.4% |
| Alliant Reloder-25 | <<locked>> | 84% | 28,819 psi | 45% | 2267 fps | 95.1% |
| Alliant Reloder-26 | 72.5 gr | 80% | 30,879 psi | 48% | 2365 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 54,172 psi | 85% | 2680 fps | 95% |
| Bofors RP15 | <<locked>> | 90% | 38,696 psi | 61% | 2487 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 50,357 psi | 79% | 2582 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 41,031 psi | 64% | 2569 fps | 95.8% |
| Bofors RP5 | <<locked>> | 86% | 36,550 psi | 57% | 2441 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 44,019 psi | 69% | 2474 fps | 98% |
| Hodgdon H1000 | <<locked>> | 96% | 41,466 psi | 65% | 2523 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 50,517 psi | 79% | 2598 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,250 psi | 66% | 2510 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 45,092 psi | 71% | 2526 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 45,179 psi | 71% | 2552 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 44,295 psi | 69% | 2536 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,753 psi | 58% | 2372 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 36,201 psi | 57% | 2500 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 41,191 psi | 65% | 2526 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 43% | 1476 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,561 psi | 81% | 2575 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,650 psi | 84% | 2608 fps | 99.6% |
| IMR 4350 | <<locked>> | 80% | 39,624 psi | 62% | 2408 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,455 psi | 71% | 2500 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 38,711 psi | 61% | 2418 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,193 psi | 69% | 2497 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 43,163 psi | 68% | 2575 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 51,837 psi | 81% | 2569 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,989 psi | 67% | 2454 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 41,176 psi | 65% | 2438 fps | 98.1% |
| Lovex S071 | <<locked>> | 84% | 29,341 psi | 46% | 2211 fps | 95% |
| Norma 203B | <<locked>> | 80% | 52,518 psi | 82% | 2625 fps | 100% |
| Norma 204 | <<locked>> | 80% | 39,218 psi | 61% | 2438 fps | 95.5% |
| Norma MRP | 72.2 gr | 82% | 33,373 psi | 52% | 2392 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 39,972 psi | 63% | 2457 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 80% | 53,113 psi | 83% | 2648 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 42,989 psi | 67% | 2585 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 38,885 psi | 61% | 2451 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 35,563 psi | 56% | 2411 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,065 psi | 44% | 1516 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,473 psi | 79% | 2585 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,398 psi | 74% | 2631 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,234 psi | 63% | 2484 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,812 psi | 61% | 2493 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,462 psi | 56% | 2480 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 80% | 53,780 psi | 84% | 2582 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,413 psi | 74% | 2533 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,062 psi | 67% | 2484 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 37,869 psi | 59% | 2428 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 44,019 psi | 69% | 2474 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,989 psi | 67% | 2454 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 51,837 psi | 81% | 2569 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,176 psi | 65% | 2438 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,675 psi | 76% | 2589 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,283 psi | 76% | 2431 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,003 psi | 66% | 2402 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 37,521 psi | 59% | 2425 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 47,558 psi | 75% | 2533 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 44,005 psi | 69% | 2477 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 36,637 psi | 57% | 2421 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,085 psi | 57% | 2365 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 80% | 54,186 psi | 85% | 2539 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,128 psi | 85% | 2552 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,397 psi | 71% | 2464 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,495 psi | 65% | 2457 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 35,462 psi | 56% | 2346 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 52,330 psi | 82% | 2552 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,785 psi | 64% | 2457 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 32,169 psi | 50% | 2326 fps | 98.4% |
| Vihtavuori N560 | 79.2 gr | 90% | 44,280 psi | 69% | 2612 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 96% | 43,642 psi | 68% | 2589 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,393 psi | 63% | 2421 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,395 psi | 66% | 2513 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,527 psi | 40% | 2247 fps | 98% |
| Winchester Supreme 780 | <<locked>> | 86% | 37,724 psi | 59% | 2398 fps | 95.3% |
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 91 powders for .338 Norma Mag. loaded with the .338 | 240gr | NorthFork Bonded Core. Alliant Reloder-26 delivers the highest muzzle velocity at 2,828 fps; across all powders the maximum-charge window runs from 1,654 fps to 2,828 fps. ADI AR 2225 gives the best case fill at 100 %, and 91 of the 91 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 240.0 gr projectile in 0.338" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-23, Alliant Reloder-25 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .338 Norma Mag. with the .338 | 240gr | NorthFork Bonded Core 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.