Load Specifications
Load data in caliber .338 Norma Mag. with .338 | 300gr | Nosler AccuBond bullet and 75 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 Winchester StaBALL HD.
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>> | 92% | 55,201 psi | 87% | 2418 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,449 psi | 88% | 2431 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 57,551 psi | 90% | 2562 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 57,101 psi | 89% | 2493 fps | 100% |
| ADI AR 2213 | <<locked>> | 92% | 54,781 psi | 86% | 2507 fps | 99.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,576 psi | 82% | 2477 fps | 99.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,108 psi | 74% | 2451 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 57,246 psi | 90% | 2490 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 57,246 psi | 90% | 2490 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,435 psi | 90% | 2477 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,565 psi | 89% | 2484 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,998 psi | 86% | 2500 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,594 psi | 89% | 2467 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,753 psi | 87% | 2526 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,898 psi | 89% | 2549 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 48,834 psi | 77% | 2497 fps | 97% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,043 psi | 88% | 2474 fps | 98.3% |
| Bofors RP15 | <<locked>> | 94% | 54,201 psi | 85% | 2490 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,564 psi | 87% | 2539 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 54,998 psi | 86% | 2500 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 54,708 psi | 86% | 2385 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 54,288 psi | 85% | 2500 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 54,215 psi | 85% | 2434 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,768 psi | 89% | 2444 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 54,621 psi | 86% | 2451 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,188 psi | 90% | 2484 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,682 psi | 90% | 2408 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 54,665 psi | 86% | 2602 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 54,505 psi | 85% | 2470 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,347 psi | 59% | 1493 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,463 psi | 88% | 2425 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,130 psi | 88% | 2405 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 56,623 psi | 89% | 2425 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,608 psi | 87% | 2431 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 94% | 56,579 psi | 89% | 2536 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,714 psi | 67% | 2375 fps | 98.7% |
| Lovex S065 | <<locked>> | 84% | 57,000 psi | 89% | 2402 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,114 psi | 86% | 2402 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,536 psi | 89% | 2431 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,551 psi | 90% | 2477 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 43,062 psi | 67% | 2398 fps | 99.9% |
| Norma MRP | <<locked>> | 90% | 54,911 psi | 86% | 2516 fps | 100% |
| Norma URP | <<locked>> | 84% | 54,723 psi | 86% | 2418 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,696 psi | 90% | 2559 fps | 100% |
| Ramshot Hunter | <<locked>> | 86% | 57,217 psi | 90% | 2474 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,782 psi | 87% | 2497 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,334 psi | 60% | 1532 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,405 psi | 88% | 2457 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 54,824 psi | 86% | 2484 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 55,187 psi | 86% | 2595 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,056 psi | 85% | 2566 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 88% | 54,665 psi | 86% | 2421 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 90% | 56,188 psi | 88% | 2474 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 54,708 psi | 86% | 2385 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,000 psi | 89% | 2402 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,114 psi | 86% | 2402 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,057 psi | 88% | 2365 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,767 psi | 87% | 2470 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 55,883 psi | 88% | 2418 fps | 99.5% |
| Somchem S365 | <<locked>> | 86% | 55,492 psi | 87% | 2418 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,550 psi | 89% | 2448 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,072 psi | 89% | 2346 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,420 psi | 88% | 2408 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,217 psi | 88% | 2438 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 54,694 psi | 86% | 2454 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 84% | 55,666 psi | 87% | 2418 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,187 psi | 86% | 2444 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 54,665 psi | 86% | 2520 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 96% | 54,650 psi | 86% | 2507 fps | 99.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,158 psi | 86% | 2566 fps | 99.2% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 52,054 psi | 82% | 2559 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,622 psi | 87% | 2372 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,418 psi | 85% | 2438 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 54,824 psi | 86% | 2546 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,492 psi | 89% | 2451 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% | 37,072 psi | 58% | 2149 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 49,371 psi | 77% | 2343 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 37,956 psi | 59% | 2247 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 41,162 psi | 65% | 2257 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 80% | 36,738 psi | 58% | 2201 fps | 96.5% |
| ADI AR 2217 | <<locked>> | 86% | 33,243 psi | 52% | 2129 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 82% | 26,527 psi | 42% | 2005 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,466 psi | 65% | 2254 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,466 psi | 65% | 2254 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,384 psi | 74% | 2346 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,089 psi | 64% | 2251 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,043 psi | 58% | 2211 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,839 psi | 56% | 2169 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,024 psi | 49% | 2113 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,363 psi | 62% | 2300 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 42,395 psi | 66% | 2385 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 43,961 psi | 69% | 2283 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 34,476 psi | 54% | 2156 fps | 97.1% |
| Bofors RP30 | <<locked>> | 84% | 32,445 psi | 51% | 2146 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 37,043 psi | 58% | 2211 fps | 98% |
| Bofors RP7 | <<locked>> | 80% | 51,547 psi | 81% | 2343 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 31,705 psi | 50% | 2096 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 50,865 psi | 80% | 2388 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 53,316 psi | 84% | 2398 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 39,131 psi | 61% | 2205 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,493 psi | 60% | 2192 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,614 psi | 70% | 2244 fps | 100% |
| Hodgdon Retumbo | 68.1 gr | 80% | 30,255 psi | 47% | 2133 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 80% | 50,676 psi | 79% | 2421 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,021 psi | 44% | 1332 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,978 psi | 74% | 2293 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,765 psi | 83% | 2359 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 46,876 psi | 73% | 2297 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,799 psi | 64% | 2201 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 80% | 35,375 psi | 55% | 2185 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 92% | 32,967 psi | 52% | 2178 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 50,517 psi | 79% | 2316 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,820 psi | 77% | 2316 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 32,039 psi | 50% | 2047 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 47,050 psi | 74% | 2333 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 27,166 psi | 43% | 2054 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 38,841 psi | 61% | 2270 fps | 99.4% |
| Norma URP | <<locked>> | 80% | 48,269 psi | 76% | 2329 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 34,954 psi | 55% | 2188 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 80% | 46,920 psi | 74% | 2336 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,169 psi | 49% | 2093 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,805 psi | 45% | 1368 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,385 psi | 77% | 2365 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,369 psi | 74% | 2385 fps | 100% |
| ReloadSwiss RS 76 | 72.9 gr | 80% | 29,167 psi | 46% | 2110 fps | 96.9% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 37,420 psi | 59% | 2287 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 42,424 psi | 66% | 2234 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 80% | 40,567 psi | 64% | 2241 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 80% | 51,547 psi | 81% | 2343 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,517 psi | 79% | 2316 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,820 psi | 77% | 2316 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,356 psi | 77% | 2277 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,234 psi | 63% | 2234 fps | 98.7% |
| Somchem S361 | <<locked>> | 80% | 42,902 psi | 67% | 2224 fps | 97.5% |
| Somchem S365 | <<locked>> | 80% | 45,571 psi | 71% | 2293 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,133 psi | 64% | 2224 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 80% | 53,534 psi | 84% | 2303 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,603 psi | 78% | 2320 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,650 psi | 56% | 2119 fps | 98% |
| Vihtavuori N170 | <<locked>> | 96% | 51,097 psi | 80% | 2402 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 48,921 psi | 77% | 2329 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,059 psi | 63% | 2231 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 38,899 psi | 61% | 2264 fps | 96.8% |
| Vihtavuori N565 | <<locked>> | 82% | 34,214 psi | 54% | 2162 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 90% | 38,885 psi | 61% | 2300 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 96% | 45,339 psi | 71% | 2451 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,646 psi | 76% | 2287 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,068 psi | 80% | 2392 fps | 100% |
| Winchester StaBALL HD | 69.9 gr | 80% | 32,111 psi | 50% | 2208 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,565 psi | 59% | 2162 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 75 powders for .338 Norma Mag. loaded with the .338 | 300gr | Nosler AccuBond. Hodgdon Retumbo delivers the highest muzzle velocity at 2,602 fps; across all powders the maximum-charge window runs from 1,493 fps to 2,602 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.338" calls for a 1:12.0 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, Winchester StaBALL HD rank at the top here: for .338 Norma Mag. with the .338 | 300gr | Nosler AccuBond 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.