Load Specifications
Load data in caliber .338 Norma Mag. with .338 | 300gr | Nosler AccuBond Long Range bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Hodgdon Retumbo and ReloadSwiss RS 76.
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>> | 94% | 57,261 psi | 90% | 2434 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,868 psi | 86% | 2408 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 55,724 psi | 87% | 2533 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 90% | 55,608 psi | 87% | 2467 fps | 100% |
| ADI AR 2213 | <<locked>> | 94% | 56,927 psi | 89% | 2526 fps | 99.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,039 psi | 80% | 2448 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,658 psi | 72% | 2421 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 55,840 psi | 88% | 2454 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,942 psi | 89% | 2464 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,158 psi | 86% | 2457 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,029 psi | 89% | 2520 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 54,795 psi | 86% | 2441 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,725 psi | 90% | 2543 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,853 psi | 86% | 2520 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 47,094 psi | 74% | 2464 fps | 96.4% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,810 psi | 86% | 2448 fps | 97.9% |
| Bofors RP15 | <<locked>> | 96% | 56,188 psi | 88% | 2510 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,534 psi | 84% | 2510 fps | 99.9% |
| Bofors RP5 | <<locked>> | 94% | 57,029 psi | 89% | 2520 fps | 100% |
| Bofors RP7 | <<locked>> | 84% | 57,116 psi | 90% | 2408 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,246 psi | 88% | 2516 fps | 100% |
| Hodgdon H414 | <<locked>> | 84% | 56,405 psi | 88% | 2457 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,405 psi | 87% | 2418 fps | 100% |
| Hodgdon H4831 | <<locked>> | 92% | 56,739 psi | 89% | 2467 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 55,608 psi | 87% | 2454 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,217 psi | 88% | 2385 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 56,594 psi | 89% | 2618 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 56,927 psi | 89% | 2497 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,376 psi | 59% | 1483 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,172 psi | 86% | 2402 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,013 psi | 86% | 2382 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,230 psi | 87% | 2402 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,696 psi | 90% | 2451 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 94% | 54,911 psi | 86% | 2510 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,162 psi | 65% | 2343 fps | 98.2% |
| Lovex S065 | <<locked>> | 84% | 55,637 psi | 87% | 2379 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,319 psi | 90% | 2425 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 54,824 psi | 86% | 2405 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,072 psi | 88% | 2451 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 41,452 psi | 65% | 2365 fps | 99.7% |
| Norma MRP | <<locked>> | 92% | 56,956 psi | 89% | 2539 fps | 100% |
| Norma URP | <<locked>> | 86% | 56,884 psi | 89% | 2434 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 55,709 psi | 87% | 2530 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 86% | 55,709 psi | 87% | 2451 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 53,737 psi | 84% | 2467 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,174 psi | 60% | 1519 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,766 psi | 86% | 2431 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,956 psi | 89% | 2503 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 57,246 psi | 90% | 2618 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,953 psi | 81% | 2530 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 90% | 56,637 psi | 89% | 2438 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 90% | 54,665 psi | 86% | 2448 fps | 100% |
| Rottweil R 907 | <<locked>> | 84% | 57,116 psi | 90% | 2408 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,637 psi | 87% | 2379 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,319 psi | 90% | 2425 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,795 psi | 86% | 2343 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,244 psi | 85% | 2444 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 54,520 psi | 85% | 2392 fps | 99.3% |
| Somchem S365 | <<locked>> | 88% | 57,493 psi | 90% | 2438 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,143 psi | 86% | 2425 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 55,637 psi | 87% | 2323 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,013 psi | 86% | 2385 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,665 psi | 86% | 2411 fps | 100% |
| Vihtavuori N170ᴾ | <<locked>> | 100% | 56,695 psi | 89% | 2470 fps | 96.6% |
| Vihtavuori N550 | <<locked>> | 86% | 57,711 psi | 90% | 2434 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,971 psi | 89% | 2461 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,695 psi | 89% | 2539 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 98% | 56,594 psi | 89% | 2526 fps | 99.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,258 psi | 83% | 2533 fps | 98.9% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 50,241 psi | 79% | 2526 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,259 psi | 85% | 2349 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,594 psi | 89% | 2457 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 56,521 psi | 89% | 2562 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,926 psi | 86% | 2425 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% | 35,998 psi | 56% | 2123 fps | 99.3% |
| Accurate 4350 | <<locked>> | 80% | 48,008 psi | 75% | 2316 fps | 100% |
| Accurate MAGPRO | 70.1 gr | 80% | 36,724 psi | 58% | 2218 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 40,030 psi | 63% | 2228 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 80% | 35,766 psi | 56% | 2175 fps | 96% |
| ADI AR 2217 | <<locked>> | 88% | 34,432 psi | 54% | 2149 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 84% | 27,412 psi | 43% | 2028 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,035 psi | 72% | 2323 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,185 psi | 83% | 2418 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,987 psi | 63% | 2224 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,955 psi | 56% | 2185 fps | 97.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,650 psi | 54% | 2146 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,095 psi | 47% | 2083 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,971 psi | 60% | 2274 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 43,816 psi | 69% | 2405 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 42,873 psi | 67% | 2254 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 33,431 psi | 52% | 2133 fps | 96.6% |
| Bofors RP30 | <<locked>> | 84% | 31,372 psi | 49% | 2116 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 35,955 psi | 56% | 2185 fps | 97.6% |
| Bofors RP7 | <<locked>> | 80% | 50,343 psi | 79% | 2320 fps | 100% |
| Hodgdon H1000 | <<locked>> | 84% | 32,880 psi | 52% | 2116 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 49,661 psi | 78% | 2365 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 52,127 psi | 82% | 2375 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 38,101 psi | 60% | 2178 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 37,492 psi | 59% | 2165 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,482 psi | 68% | 2221 fps | 100% |
| Hodgdon Retumbo | 66.3 gr | 80% | 29,385 psi | 46% | 2103 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 49,182 psi | 77% | 2395 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,963 psi | 44% | 1322 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,847 psi | 72% | 2270 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,605 psi | 81% | 2336 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 45,614 psi | 71% | 2274 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 39,827 psi | 62% | 2175 fps | 96.8% |
| IMR 7828 SSC | <<locked>> | 80% | 34,389 psi | 54% | 2156 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 92% | 31,865 psi | 50% | 2149 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 49,342 psi | 77% | 2293 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,645 psi | 75% | 2293 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 31,212 psi | 49% | 2024 fps | 98.3% |
| Norma 204 | <<locked>> | 80% | 45,919 psi | 72% | 2306 fps | 99.3% |
| Norma 217 | <<locked>> | 88% | 27,963 psi | 44% | 2070 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 37,550 psi | 59% | 2241 fps | 99.1% |
| Norma URP | <<locked>> | 80% | 46,963 psi | 74% | 2306 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 33,837 psi | 53% | 2159 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 45,803 psi | 72% | 2313 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 30,182 psi | 47% | 2064 fps | 96.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,587 psi | 45% | 1355 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,950 psi | 75% | 2343 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,992 psi | 72% | 2359 fps | 100% |
| ReloadSwiss RS 76 | 71 gr | 80% | 28,297 psi | 44% | 2077 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 36,071 psi | 57% | 2254 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 41,336 psi | 65% | 2208 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 80% | 39,392 psi | 62% | 2215 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 80% | 50,343 psi | 79% | 2320 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,342 psi | 77% | 2293 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,645 psi | 75% | 2293 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,269 psi | 76% | 2254 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,073 psi | 61% | 2208 fps | 98.4% |
| Somchem S361 | <<locked>> | 80% | 41,858 psi | 66% | 2198 fps | 97.1% |
| Somchem S365 | <<locked>> | 80% | 44,237 psi | 69% | 2270 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,059 psi | 63% | 2198 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 80% | 52,315 psi | 82% | 2283 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,356 psi | 76% | 2297 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,635 psi | 54% | 2093 fps | 97.6% |
| Vihtavuori N170 | <<locked>> | 96% | 49,705 psi | 78% | 2372 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 47,747 psi | 75% | 2306 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,798 psi | 61% | 2205 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 37,681 psi | 59% | 2234 fps | 96.3% |
| Vihtavuori N565 | <<locked>> | 84% | 35,418 psi | 56% | 2182 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 90% | 37,565 psi | 59% | 2267 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 96% | 43,859 psi | 69% | 2415 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,471 psi | 74% | 2267 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,661 psi | 78% | 2365 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,821 psi | 48% | 2178 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,419 psi | 57% | 2136 fps | 97.5% |
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 74 powders for .338 Norma Mag. loaded with the .338 | 300gr | Nosler AccuBond Long Range. Hodgdon Retumbo delivers the highest muzzle velocity at 2,618 fps; across all powders the maximum-charge window runs from 1,483 fps to 2,618 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 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 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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. Accurate MAGPRO, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .338 Norma Mag. with the .338 | 300gr | Nosler AccuBond Long Range 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.