Load Specifications
Load data in caliber .338 Norma Mag. with .338 | 300gr | Hornady A-TIP bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Accurate High Country 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% | 57,580 psi | 90% | 2441 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,259 psi | 87% | 2415 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 55,506 psi | 87% | 2536 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 92% | 56,246 psi | 88% | 2543 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 90% | 55,941 psi | 88% | 2474 fps | 100% |
| ADI AR 2213 | <<locked>> | 94% | 57,464 psi | 90% | 2536 fps | 99.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,474 psi | 81% | 2457 fps | 99.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,064 psi | 72% | 2431 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 56,144 psi | 88% | 2470 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,231 psi | 88% | 2461 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,319 psi | 90% | 2470 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,477 psi | 87% | 2467 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,522 psi | 90% | 2530 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,129 psi | 86% | 2444 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 54,404 psi | 85% | 2507 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 55,434 psi | 87% | 2530 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 47,674 psi | 75% | 2477 fps | 96.6% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,158 psi | 86% | 2454 fps | 98% |
| Bofors RP15 | <<locked>> | 96% | 56,449 psi | 88% | 2513 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,027 psi | 85% | 2516 fps | 99.9% |
| Bofors RP5 | <<locked>> | 94% | 57,522 psi | 90% | 2530 fps | 100% |
| Bofors RP7 | <<locked>> | 84% | 57,464 psi | 90% | 2415 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,695 psi | 89% | 2523 fps | 100% |
| Hodgdon H414 | <<locked>> | 84% | 56,956 psi | 89% | 2467 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,753 psi | 87% | 2425 fps | 100% |
| Hodgdon H4831 | <<locked>> | 92% | 57,217 psi | 90% | 2477 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,144 psi | 88% | 2464 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,579 psi | 89% | 2392 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,087 psi | 89% | 2628 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,276 psi | 90% | 2503 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,391 psi | 59% | 1486 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,477 psi | 87% | 2408 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,332 psi | 87% | 2388 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,564 psi | 87% | 2408 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,621 psi | 86% | 2411 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 94% | 55,405 psi | 87% | 2520 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,597 psi | 65% | 2352 fps | 98.4% |
| Lovex S065 | <<locked>> | 84% | 55,985 psi | 88% | 2385 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,667 psi | 90% | 2431 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,143 psi | 86% | 2411 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,376 psi | 88% | 2457 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 41,901 psi | 66% | 2375 fps | 99.8% |
| Norma MRP | <<locked>> | 92% | 57,479 psi | 90% | 2546 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,261 psi | 90% | 2444 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,260 psi | 88% | 2536 fps | 100% |
| Ramshot Hunter | <<locked>> | 86% | 56,028 psi | 88% | 2454 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,244 psi | 85% | 2477 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,189 psi | 60% | 1522 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,347 psi | 87% | 2441 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,522 psi | 90% | 2513 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 57,682 psi | 90% | 2625 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,649 psi | 83% | 2543 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 90% | 57,130 psi | 90% | 2448 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 90% | 55,187 psi | 86% | 2457 fps | 100% |
| Rottweil R 907 | <<locked>> | 84% | 57,464 psi | 90% | 2415 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,985 psi | 88% | 2385 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,667 psi | 90% | 2431 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,114 psi | 86% | 2349 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,766 psi | 86% | 2454 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 54,781 psi | 86% | 2398 fps | 99.3% |
| Somchem S365 | <<locked>> | 86% | 54,346 psi | 85% | 2402 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,477 psi | 87% | 2431 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,014 psi | 88% | 2329 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,361 psi | 87% | 2392 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,969 psi | 86% | 2415 fps | 100% |
| Vihtavuori N170ᴾ | <<locked>> | 100% | 57,087 psi | 89% | 2480 fps | 96.7% |
| Vihtavuori N550 | <<locked>> | 84% | 54,665 psi | 86% | 2402 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,580 psi | 90% | 2470 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,232 psi | 90% | 2549 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 98% | 57,072 psi | 89% | 2536 fps | 99.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,751 psi | 84% | 2543 fps | 99% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 50,705 psi | 79% | 2533 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,549 psi | 85% | 2356 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,956 psi | 89% | 2467 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,159 psi | 90% | 2569 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,216 psi | 87% | 2428 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% | 36,303 psi | 57% | 2129 fps | 99.4% |
| Accurate 4350 | <<locked>> | 80% | 48,428 psi | 76% | 2326 fps | 100% |
| Accurate High Country | 69.3 gr | 80% | 39,334 psi | 62% | 2277 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 80% | 37,057 psi | 58% | 2224 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 40,364 psi | 63% | 2238 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 80% | 35,911 psi | 56% | 2182 fps | 96.1% |
| ADI AR 2217 | <<locked>> | 88% | 34,809 psi | 55% | 2162 fps | 96% |
| ADI AR 2225 | <<locked>> | 84% | 27,644 psi | 43% | 2034 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,698 psi | 64% | 2238 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,441 psi | 73% | 2329 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,577 psi | 84% | 2425 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,321 psi | 63% | 2231 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,114 psi | 57% | 2192 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,969 psi | 55% | 2152 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,371 psi | 48% | 2093 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,348 psi | 60% | 2280 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 44,382 psi | 70% | 2418 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 43,221 psi | 68% | 2264 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 33,750 psi | 53% | 2139 fps | 96.8% |
| Bofors RP30 | <<locked>> | 84% | 31,633 psi | 50% | 2126 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 36,114 psi | 57% | 2192 fps | 97.7% |
| Bofors RP7 | <<locked>> | 80% | 50,720 psi | 79% | 2326 fps | 100% |
| Hodgdon H1000 | <<locked>> | 84% | 33,141 psi | 52% | 2126 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 50,024 psi | 78% | 2372 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 52,286 psi | 82% | 2379 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 38,406 psi | 60% | 2185 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 37,637 psi | 59% | 2172 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,874 psi | 69% | 2231 fps | 100% |
| Hodgdon Retumbo | 66.8 gr | 80% | 29,646 psi | 46% | 2113 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 49,501 psi | 78% | 2402 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,036 psi | 44% | 1325 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,151 psi | 72% | 2277 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,938 psi | 81% | 2343 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 46,006 psi | 72% | 2280 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,103 psi | 63% | 2185 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 80% | 34,679 psi | 54% | 2165 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 92% | 32,126 psi | 50% | 2156 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 49,661 psi | 78% | 2303 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,979 psi | 75% | 2300 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 31,401 psi | 49% | 2031 fps | 98.4% |
| Norma 204 | <<locked>> | 80% | 46,238 psi | 72% | 2316 fps | 99.3% |
| Norma 217 | <<locked>> | 88% | 28,195 psi | 44% | 2077 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 37,869 psi | 59% | 2251 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 47,355 psi | 74% | 2313 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 34,113 psi | 53% | 2169 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 46,137 psi | 72% | 2320 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 30,414 psi | 48% | 2070 fps | 96.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,674 psi | 45% | 1358 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,327 psi | 76% | 2349 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,543 psi | 73% | 2369 fps | 100% |
| ReloadSwiss RS 76 | 71.5 gr | 80% | 28,500 psi | 45% | 2087 fps | 96.4% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 36,434 psi | 57% | 2264 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 41,669 psi | 65% | 2218 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 80% | 39,711 psi | 62% | 2221 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 80% | 50,720 psi | 79% | 2326 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,661 psi | 78% | 2303 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,979 psi | 75% | 2300 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,573 psi | 76% | 2260 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,421 psi | 62% | 2218 fps | 98.5% |
| Somchem S361 | <<locked>> | 80% | 42,293 psi | 66% | 2208 fps | 97.3% |
| Somchem S365 | <<locked>> | 80% | 44,614 psi | 70% | 2277 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,190 psi | 63% | 2205 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 80% | 52,649 psi | 83% | 2290 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,733 psi | 76% | 2306 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,925 psi | 55% | 2103 fps | 97.7% |
| Vihtavuori N170 | <<locked>> | 96% | 50,096 psi | 79% | 2382 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 48,095 psi | 75% | 2313 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,146 psi | 61% | 2211 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 37,985 psi | 60% | 2241 fps | 96.5% |
| Vihtavuori N565 | <<locked>> | 82% | 33,388 psi | 52% | 2139 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 90% | 37,985 psi | 60% | 2280 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 96% | 44,266 psi | 69% | 2425 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,761 psi | 75% | 2270 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,024 psi | 78% | 2372 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,154 psi | 49% | 2188 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,724 psi | 58% | 2142 fps | 97.7% |
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 76 powders for .338 Norma Mag. loaded with the .338 | 300gr | Hornady A-TIP. Hodgdon Retumbo delivers the highest muzzle velocity at 2,628 fps; across all powders the maximum-charge window runs from 1,486 fps to 2,628 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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-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, Accurate High Country, ReloadSwiss RS 76 rank at the top here: for .338 Norma Mag. with the .338 | 300gr | Hornady A-TIP 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.