Load Specifications
Bullet:.338 | 250gr | Barnes LRX BT
Bullet Manufacturer:Barnes
Bullet Weight:250 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338 Norma Mag. load data
Case Length (l3):2.49"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:105.4 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:11.0
Load data in caliber .338 Norma Mag. with .338 | 250gr | Barnes LRX BT bullet and 89 powders. The key underlying parameters are shown in the table above.
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% | 56,884 psi | 89% | 2602 fps | 99.8% |
| Accurate 3100 | <<locked>> | 98% | 55,811 psi | 87% | 2654 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 56,217 psi | 88% | 2569 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 53,969 psi | 85% | 2638 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 57,638 psi | 90% | 2802 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 96% | 54,607 psi | 86% | 2746 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 84% | 56,202 psi | 88% | 2608 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,158 psi | 86% | 2694 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 98% | 56,391 psi | 88% | 2749 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 43,816 psi | 69% | 2536 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,696 psi | 61% | 2493 fps | 98.2% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,230 psi | 87% | 2690 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,230 psi | 87% | 2690 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,392 psi | 90% | 2631 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,348 psi | 90% | 2648 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,114 psi | 86% | 2694 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,420 psi | 88% | 2710 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,505 psi | 85% | 2680 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,811 psi | 87% | 2743 fps | 99.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,782 psi | 89% | 2713 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,994 psi | 77% | 2667 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,421 psi | 90% | 2805 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 55,303 psi | 87% | 2661 fps | 95.9% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 2723 fps | 99.4% |
| Bofors RP3 | <<locked>> | 82% | 54,563 psi | 86% | 2595 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,686 psi | 70% | 2598 fps | 97.4% |
| Bofors RP5 | <<locked>> | 98% | 55,811 psi | 87% | 2743 fps | 99.6% |
| Bofors RP7 | <<locked>> | 88% | 57,464 psi | 90% | 2648 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,414 psi | 76% | 2621 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 82% | 54,911 psi | 86% | 2618 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,275 psi | 88% | 2694 fps | 100% |
| Hodgdon H4350 | <<locked>> | 86% | 55,608 psi | 87% | 2654 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 96% | 56,724 psi | 89% | 2697 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,376 psi | 87% | 2677 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,448 psi | 87% | 2621 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,935 psi | 75% | 2717 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 88% | 56,724 psi | 89% | 2733 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,782 psi | 58% | 1627 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,753 psi | 87% | 2592 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,201 psi | 87% | 2631 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,622 psi | 87% | 2621 fps | 99.9% |
| IMR 4831 | <<locked>> | 90% | 54,505 psi | 85% | 2631 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,331 psi | 85% | 2628 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 98% | 54,027 psi | 85% | 2726 fps | 98.6% |
| Lovex S062 | <<locked>> | 82% | 55,840 psi | 88% | 2582 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,695 psi | 87% | 2615 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 57,203 psi | 90% | 2657 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,603 psi | 78% | 2569 fps | 99.9% |
| Norma 203B | <<locked>> | 82% | 56,652 psi | 89% | 2635 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,057 psi | 88% | 2684 fps | 99.4% |
| Norma MRP | <<locked>> | 96% | 55,695 psi | 87% | 2766 fps | 100% |
| Norma URP | <<locked>> | 90% | 56,449 psi | 88% | 2677 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,476 psi | 85% | 2743 fps | 99% |
| Ramshot Hunter | <<locked>> | 90% | 55,216 psi | 87% | 2684 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,605 psi | 82% | 2684 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,405 psi | 59% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,578 psi | 86% | 2605 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,840 psi | 88% | 2697 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,085 psi | 85% | 2664 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,318 psi | 88% | 2746 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,066 psi | 75% | 2713 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 82% | 57,667 psi | 90% | 2589 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,853 psi | 86% | 2598 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,608 psi | 89% | 2664 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 96% | 57,566 psi | 90% | 2723 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 88% | 57,464 psi | 90% | 2648 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,695 psi | 87% | 2615 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 55,840 psi | 88% | 2582 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,203 psi | 90% | 2657 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,565 psi | 89% | 2654 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,506 psi | 87% | 2484 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,172 psi | 86% | 2572 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,101 psi | 89% | 2720 fps | 99.6% |
| Somchem S355 | <<locked>> | 84% | 54,694 psi | 86% | 2592 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,476 psi | 85% | 2608 fps | 97.9% |
| Somchem S365 | <<locked>> | 92% | 56,347 psi | 88% | 2674 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,346 psi | 85% | 2648 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 86% | 55,840 psi | 88% | 2566 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,752 psi | 86% | 2621 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,450 psi | 90% | 2674 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 82% | 56,753 psi | 89% | 2562 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,508 psi | 90% | 2674 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,303 psi | 87% | 2687 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,767 psi | 87% | 2762 fps | 98.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,227 psi | 80% | 2680 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,273 psi | 85% | 2585 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,478 psi | 89% | 2697 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,301 psi | 84% | 2789 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,418 psi | 85% | 2644 fps | 99.3% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 80% | 53,171 psi | 83% | 2552 fps | 99.5% |
| Accurate 3100 | <<locked>> | 80% | 29,936 psi | 47% | 2195 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 52,881 psi | 83% | 2530 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,872 psi | 64% | 2434 fps | 99.8% |
| Accurate High Country | <<locked>> | 86% | 40,393 psi | 63% | 2513 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 90% | 44,063 psi | 69% | 2572 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 49,661 psi | 78% | 2516 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 37,028 psi | 58% | 2375 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 88% | 40,306 psi | 63% | 2470 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 98% | 40,959 psi | 64% | 2477 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 94% | 31,894 psi | 50% | 2326 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 37,144 psi | 58% | 2375 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 37,144 psi | 58% | 2375 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,473 psi | 79% | 2536 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,809 psi | 84% | 2602 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,784 psi | 62% | 2448 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,600 psi | 71% | 2559 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 36,767 psi | 58% | 2369 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,115 psi | 58% | 2418 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,124 psi | 46% | 2231 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 84% | 28,921 psi | 45% | 2238 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,227 psi | 49% | 2339 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 51,967 psi | 81% | 2608 fps | 95.1% |
| Bofors RP15 | <<locked>> | 88% | 36,753 psi | 58% | 2408 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 51,039 psi | 80% | 2549 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 38,986 psi | 61% | 2490 fps | 95.7% |
| Bofors RP5 | <<locked>> | 86% | 37,115 psi | 58% | 2418 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 44,570 psi | 70% | 2448 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 94% | 39,334 psi | 62% | 2448 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 51,256 psi | 80% | 2566 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,960 psi | 67% | 2484 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 80% | 45,847 psi | 72% | 2500 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 88% | 42,989 psi | 67% | 2474 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 42,293 psi | 66% | 2461 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,231 psi | 58% | 2343 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 34,476 psi | 54% | 2425 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 41,959 psi | 66% | 2500 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,383 psi | 43% | 1453 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,257 psi | 82% | 2546 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,205 psi | 63% | 2385 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,006 psi | 72% | 2470 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 39,247 psi | 62% | 2392 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 42,105 psi | 66% | 2421 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 90% | 41,205 psi | 65% | 2500 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 52,576 psi | 82% | 2539 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,497 psi | 68% | 2425 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 41,655 psi | 65% | 2411 fps | 98.6% |
| Lovex S071 | <<locked>> | 84% | 29,457 psi | 46% | 2182 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 53,142 psi | 83% | 2589 fps | 100% |
| Norma 204 | <<locked>> | 80% | 39,856 psi | 62% | 2415 fps | 96.4% |
| Norma MRP | <<locked>> | 80% | 31,473 psi | 49% | 2310 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 40,625 psi | 64% | 2431 fps | 99.7% |
| Ramshot Grand | <<locked>> | 90% | 40,799 psi | 64% | 2507 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 39,523 psi | 62% | 2425 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 88% | 33,634 psi | 53% | 2336 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,007 psi | 44% | 1490 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,242 psi | 80% | 2556 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,486 psi | 76% | 2598 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,872 psi | 64% | 2457 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,450 psi | 62% | 2470 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 33,576 psi | 53% | 2402 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 54,273 psi | 85% | 2546 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,022 psi | 75% | 2500 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 40,959 psi | 64% | 2408 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 82% | 35,940 psi | 56% | 2352 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 44,570 psi | 70% | 2448 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,497 psi | 68% | 2425 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 52,576 psi | 82% | 2539 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,655 psi | 65% | 2411 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,530 psi | 78% | 2559 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,863 psi | 77% | 2398 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,467 psi | 67% | 2375 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 35,621 psi | 56% | 2346 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 48,211 psi | 76% | 2500 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 41,742 psi | 65% | 2398 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 37,304 psi | 58% | 2392 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 34,127 psi | 53% | 2287 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 46,064 psi | 72% | 2431 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,003 psi | 66% | 2425 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 33,634 psi | 53% | 2270 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 53,098 psi | 83% | 2516 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,365 psi | 65% | 2428 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 32,430 psi | 51% | 2293 fps | 98.8% |
| Vihtavuori N560 | <<locked>> | 88% | 42,177 psi | 66% | 2533 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 94% | 41,510 psi | 65% | 2513 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,046 psi | 64% | 2395 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,105 psi | 68% | 2487 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,614 psi | 40% | 2221 fps | 98.6% |
| Winchester Supreme 780 | <<locked>> | 84% | 35,752 psi | 56% | 2323 fps | 95.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 89 powders for .338 Norma Mag. loaded with the .338 | 250gr | Barnes LRX BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,805 fps; across all powders the maximum-charge window runs from 1,627 fps to 2,805 fps. ADI AR 2217 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.