Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 275gr | Alaska Bullet Works Kodiak SP SPBC bullet and 65 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Vihtavuori N560.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 90% | 53,693 psi | 88% | 2530 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 54,708 psi | 90% | 2546 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 52,388 psi | 86% | 2621 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 86% | 51,880 psi | 85% | 2559 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 90% | 53,417 psi | 88% | 2621 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,998 psi | 90% | 2644 fps | 99.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,516 psi | 81% | 2615 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 52,286 psi | 86% | 2549 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 55,114 psi | 90% | 2598 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 53,795 psi | 88% | 2618 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 51,793 psi | 85% | 2539 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,752 psi | 90% | 2644 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 51,532 psi | 85% | 2612 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 51,648 psi | 85% | 2667 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 54,447 psi | 89% | 2585 fps | 97.8% |
| Bofors RP15 | <<locked>> | 92% | 53,026 psi | 87% | 2605 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 54,505 psi | 89% | 2657 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 53,795 psi | 88% | 2618 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 52,953 psi | 87% | 2615 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 88% | 53,040 psi | 87% | 2562 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 88% | 52,127 psi | 86% | 2546 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 52,489 psi | 86% | 2480 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 53,708 psi | 88% | 2723 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,492 psi | 62% | 1601 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 54,810 psi | 90% | 2539 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 55,071 psi | 90% | 2539 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 53,940 psi | 89% | 2543 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 90% | 51,605 psi | 85% | 2602 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,078 psi | 74% | 2533 fps | 98.8% |
| Lovex S065 | <<locked>> | 82% | 55,071 psi | 90% | 2513 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 53,563 psi | 88% | 2516 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 51,837 psi | 85% | 2503 fps | 100% |
| Norma 204 | <<locked>> | 82% | 52,040 psi | 85% | 2539 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 45,469 psi | 75% | 2556 fps | 99.9% |
| Norma MRP | <<locked>> | 88% | 53,635 psi | 88% | 2635 fps | 100% |
| Norma URP | <<locked>> | 82% | 53,200 psi | 87% | 2533 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 52,199 psi | 86% | 2618 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 51,924 psi | 85% | 2539 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 54,346 psi | 89% | 2612 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,392 psi | 63% | 1640 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 54,737 psi | 90% | 2569 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 52,982 psi | 87% | 2592 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 54,143 psi | 89% | 2717 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 53,258 psi | 87% | 2680 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 86% | 52,852 psi | 87% | 2530 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 88% | 54,621 psi | 90% | 2592 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 55,071 psi | 90% | 2513 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 53,563 psi | 88% | 2516 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 54,128 psi | 89% | 2477 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 54,215 psi | 89% | 2585 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 54,186 psi | 89% | 2526 fps | 99.2% |
| Somchem S365 | <<locked>> | 84% | 54,041 psi | 89% | 2536 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 51,735 psi | 85% | 2516 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 54,665 psi | 90% | 2523 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 54,708 psi | 90% | 2549 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 53,316 psi | 88% | 2562 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 82% | 53,911 psi | 89% | 2530 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 53,809 psi | 88% | 2559 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 53,345 psi | 88% | 2631 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 94% | 53,461 psi | 88% | 2621 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 98% | 54,186 psi | 89% | 2680 fps | 98.9% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 54,969 psi | 90% | 2733 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 53,925 psi | 89% | 2484 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 53,708 psi | 88% | 2661 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 54,839 psi | 90% | 2562 fps | 99.9% |
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 3100 | <<locked>> | 80% | 38,537 psi | 63% | 2290 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 51,140 psi | 84% | 2497 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 39,595 psi | 65% | 2395 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 42,525 psi | 70% | 2402 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 80% | 38,101 psi | 63% | 2349 fps | 96.6% |
| ADI AR 2217 | <<locked>> | 86% | 34,548 psi | 57% | 2270 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 82% | 27,514 psi | 45% | 2136 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,066 psi | 81% | 2503 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,525 psi | 70% | 2398 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,551 psi | 63% | 2356 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,260 psi | 61% | 2310 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,155 psi | 53% | 2247 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,350 psi | 68% | 2451 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 44,585 psi | 73% | 2546 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 45,339 psi | 74% | 2431 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 35,839 psi | 59% | 2300 fps | 97.1% |
| Bofors RP30 | <<locked>> | 84% | 33,982 psi | 56% | 2287 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 38,551 psi | 63% | 2356 fps | 98% |
| Hodgdon H1000 | <<locked>> | 82% | 32,924 psi | 54% | 2234 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 80% | 40,480 psi | 66% | 2349 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,914 psi | 66% | 2336 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,209 psi | 76% | 2392 fps | 100% |
| Hodgdon Retumbo | 75.6 gr | 80% | 31,401 psi | 52% | 2270 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,195 psi | 46% | 1430 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,269 psi | 79% | 2444 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 48,370 psi | 79% | 2448 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,989 psi | 69% | 2346 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 80% | 36,796 psi | 60% | 2329 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 92% | 34,490 psi | 57% | 2320 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 51,895 psi | 85% | 2470 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,270 psi | 83% | 2470 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 33,286 psi | 55% | 2182 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 48,747 psi | 80% | 2487 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 28,384 psi | 47% | 2185 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 40,480 psi | 66% | 2418 fps | 99.4% |
| Norma URP | <<locked>> | 80% | 49,821 psi | 82% | 2484 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,434 psi | 60% | 2336 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 80% | 48,689 psi | 80% | 2490 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 32,474 psi | 53% | 2231 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,761 psi | 47% | 1463 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,126 psi | 84% | 2520 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,327 psi | 81% | 2539 fps | 100% |
| ReloadSwiss RS 76 | 81 gr | 80% | 30,429 psi | 50% | 2247 fps | 97% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 36,622 psi | 60% | 2382 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 43,787 psi | 72% | 2382 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 80% | 42,105 psi | 69% | 2388 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,895 psi | 85% | 2470 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,270 psi | 83% | 2470 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,778 psi | 83% | 2428 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,771 psi | 69% | 2385 fps | 98.7% |
| Somchem S361 | <<locked>> | 80% | 44,367 psi | 73% | 2372 fps | 97.6% |
| Somchem S365 | <<locked>> | 80% | 47,210 psi | 78% | 2444 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,612 psi | 70% | 2372 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 51,213 psi | 84% | 2474 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,970 psi | 61% | 2260 fps | 98% |
| Vihtavuori N170 | <<locked>> | 94% | 49,821 psi | 82% | 2510 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 50,618 psi | 83% | 2484 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,713 psi | 68% | 2379 fps | 100% |
| Vihtavuori N560 | 78.5 gr | 80% | 40,437 psi | 66% | 2408 fps | 96.8% |
| Vihtavuori N565 | <<locked>> | 82% | 35,723 psi | 59% | 2303 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 90% | 40,872 psi | 67% | 2454 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 96% | 47,718 psi | 78% | 2615 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,430 psi | 83% | 2438 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 34,084 psi | 56% | 2352 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,030 psi | 64% | 2306 fps | 98% |
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 65 powders for .338 Lapua Mag. loaded with the .338 | 275gr | Alaska Bullet Works Kodiak SP SPBC. Vihtavuori N570 delivers the highest muzzle velocity at 2,733 fps; across all powders the maximum-charge window runs from 1,601 fps to 2,733 fps. ADI AR 2217 gives the best case fill at 100 %, and 65 of the 65 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. The 275.0 gr projectile in 0.338" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 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. Hodgdon Retumbo, ReloadSwiss RS 76, Vihtavuori N560 rank at the top here: for .338 Lapua Mag. with the .338 | 275gr | Alaska Bullet Works Kodiak SP SPBC 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.