Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 300gr | Berger Hybrid OTM Tactical bullet and 68 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 ReloadSwiss RS 80.
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% | 53,359 psi | 88% | 2405 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 54,418 psi | 89% | 2418 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 51,938 psi | 85% | 2497 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 88% | 55,027 psi | 90% | 2480 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 53,055 psi | 87% | 2493 fps | 99.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,563 psi | 90% | 2516 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 47,094 psi | 77% | 2493 fps | 96.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,921 psi | 80% | 2487 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 51,866 psi | 85% | 2431 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 51,866 psi | 85% | 2431 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 52,141 psi | 86% | 2421 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 54,766 psi | 90% | 2474 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 53,417 psi | 88% | 2490 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 54,824 psi | 90% | 2454 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,288 psi | 89% | 2516 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,984 psi | 90% | 2536 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 50,937 psi | 84% | 2543 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 54,114 psi | 89% | 2461 fps | 98.2% |
| Bofors RP15 | <<locked>> | 92% | 52,663 psi | 86% | 2480 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 53,940 psi | 89% | 2530 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 53,417 psi | 88% | 2490 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 52,504 psi | 86% | 2487 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 52,721 psi | 87% | 2438 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 51,750 psi | 85% | 2425 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 52,330 psi | 86% | 2356 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 53,156 psi | 87% | 2592 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 62% | 1509 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 54,563 psi | 90% | 2411 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 54,824 psi | 90% | 2411 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 53,592 psi | 88% | 2418 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 92% | 54,824 psi | 90% | 2526 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,498 psi | 73% | 2415 fps | 99.1% |
| Lovex S065 | <<locked>> | 82% | 54,984 psi | 90% | 2388 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 53,171 psi | 87% | 2392 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 54,839 psi | 90% | 2425 fps | 100% |
| Norma 204 | <<locked>> | 82% | 51,895 psi | 85% | 2415 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 44,976 psi | 74% | 2438 fps | 100% |
| Norma MRP | <<locked>> | 88% | 53,142 psi | 87% | 2503 fps | 100% |
| Norma URP | <<locked>> | 82% | 52,794 psi | 87% | 2402 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 51,663 psi | 85% | 2493 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 51,750 psi | 85% | 2415 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 53,737 psi | 88% | 2484 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,479 psi | 63% | 1545 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 54,331 psi | 89% | 2441 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 52,721 psi | 87% | 2467 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 53,359 psi | 88% | 2585 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 52,417 psi | 86% | 2552 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 86% | 52,736 psi | 87% | 2408 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 88% | 54,389 psi | 89% | 2464 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 54,984 psi | 90% | 2388 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 53,171 psi | 87% | 2392 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 53,867 psi | 88% | 2352 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 53,983 psi | 89% | 2461 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 53,766 psi | 88% | 2405 fps | 99.4% |
| Somchem S365 | <<locked>> | 84% | 53,737 psi | 88% | 2408 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 54,766 psi | 90% | 2438 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 54,389 psi | 89% | 2395 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 54,244 psi | 89% | 2425 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 52,895 psi | 87% | 2441 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 82% | 53,650 psi | 88% | 2402 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 53,635 psi | 88% | 2434 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 52,837 psi | 87% | 2507 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 94% | 52,997 psi | 87% | 2497 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 98% | 53,621 psi | 88% | 2556 fps | 99.2% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 54,288 psi | 89% | 2605 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 53,650 psi | 88% | 2359 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 53,258 psi | 87% | 2533 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 54,404 psi | 89% | 2438 fps | 100% |
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% | 38,435 psi | 63% | 2182 fps | 99.8% |
| Accurate 4350 | <<locked>> | 80% | 50,981 psi | 84% | 2375 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 39,334 psi | 65% | 2283 fps | 96.6% |
| ADI AR 2209 | <<locked>> | 80% | 42,366 psi | 70% | 2287 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 80% | 37,782 psi | 62% | 2234 fps | 97.1% |
| ADI AR 2217 | <<locked>> | 84% | 32,213 psi | 53% | 2119 fps | 95.3% |
| ADI AR 2218 | <<locked>> | 98% | 43,947 psi | 72% | 2434 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 25,759 psi | 42% | 1995 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,801 psi | 70% | 2290 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,801 psi | 70% | 2290 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,849 psi | 80% | 2379 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,409 psi | 70% | 2283 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,203 psi | 63% | 2244 fps | 98.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,115 psi | 61% | 2198 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,024 psi | 53% | 2146 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,973 psi | 67% | 2336 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 41,002 psi | 67% | 2372 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 42,424 psi | 70% | 2270 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 35,636 psi | 59% | 2192 fps | 97.7% |
| Bofors RP30 | <<locked>> | 82% | 31,502 psi | 52% | 2136 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 38,203 psi | 63% | 2244 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 80% | 30,632 psi | 50% | 2083 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 80% | 40,335 psi | 66% | 2238 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,581 psi | 65% | 2224 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,992 psi | 76% | 2274 fps | 100% |
| Hodgdon Retumbo | 70.2 gr | 80% | 31,314 psi | 51% | 2172 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 46% | 1345 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,109 psi | 79% | 2323 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 48,196 psi | 79% | 2326 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,829 psi | 69% | 2234 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 80% | 36,564 psi | 60% | 2221 fps | 96.9% |
| IMR 8133 Enduron | <<locked>> | 90% | 32,111 psi | 53% | 2169 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 51,764 psi | 85% | 2346 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 50,038 psi | 82% | 2346 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 33,214 psi | 55% | 2080 fps | 99% |
| Norma 204 | <<locked>> | 80% | 48,559 psi | 80% | 2369 fps | 99.7% |
| Norma 217 | <<locked>> | 84% | 26,498 psi | 44% | 2044 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 40,190 psi | 66% | 2303 fps | 99.6% |
| Norma URP | <<locked>> | 80% | 49,574 psi | 81% | 2359 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 36,172 psi | 59% | 2228 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 80% | 48,472 psi | 80% | 2369 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 32,227 psi | 53% | 2126 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,892 psi | 47% | 1381 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,836 psi | 83% | 2395 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,037 psi | 81% | 2418 fps | 100% |
| ReloadSwiss RS 76 | 75.1 gr | 80% | 30,197 psi | 50% | 2149 fps | 97.7% |
| ReloadSwiss RS 80 | 83.3 gr | 88% | 36,274 psi | 60% | 2274 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 43,555 psi | 72% | 2267 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 80% | 41,756 psi | 69% | 2274 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,764 psi | 85% | 2346 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 50,038 psi | 82% | 2346 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,459 psi | 83% | 2306 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,452 psi | 68% | 2267 fps | 99.1% |
| Somchem S361 | <<locked>> | 80% | 44,150 psi | 72% | 2257 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 47,007 psi | 77% | 2323 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,264 psi | 69% | 2254 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 51,082 psi | 84% | 2352 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,840 psi | 60% | 2152 fps | 98.5% |
| Vihtavuori N170 | <<locked>> | 94% | 49,559 psi | 81% | 2392 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 50,314 psi | 83% | 2359 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,394 psi | 68% | 2260 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 40,176 psi | 66% | 2297 fps | 97.4% |
| Vihtavuori N565 | <<locked>> | 80% | 33,185 psi | 54% | 2146 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 88% | 37,739 psi | 62% | 2287 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 94% | 44,106 psi | 72% | 2441 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,082 psi | 82% | 2316 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,837 psi | 56% | 2244 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,783 psi | 64% | 2198 fps | 98.5% |
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 68 powders for .338 Lapua Mag. loaded with the .338 | 300gr | Berger Hybrid OTM Tactical. Vihtavuori N570 delivers the highest muzzle velocity at 2,605 fps; across all powders the maximum-charge window runs from 1,509 fps to 2,605 fps. ADI AR 2217 gives the best case fill at 100 %, and 68 of the 68 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 300.0 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 2218, ADI AR 2225 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, ReloadSwiss RS 80 rank at the top here: for .338 Lapua Mag. with the .338 | 300gr | Berger Hybrid OTM Tactical 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.