Load Specifications
Load data in caliber .338 Norma Mag. with .338 | 300gr | Berger Elite Hunter bullet and 74 powders. The key underlying parameters are shown in the table above.
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% | 54,447 psi | 85% | 2405 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,709 psi | 87% | 2421 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 55,956 psi | 88% | 2543 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 92% | 56,637 psi | 89% | 2546 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 90% | 56,347 psi | 88% | 2480 fps | 100% |
| ADI AR 2213 | <<locked>> | 92% | 54,027 psi | 85% | 2493 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,953 psi | 81% | 2464 fps | 99.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,369 psi | 73% | 2434 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,710 psi | 89% | 2467 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,869 psi | 88% | 2470 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,259 psi | 85% | 2487 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,550 psi | 87% | 2451 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,027 psi | 86% | 2516 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,072 psi | 88% | 2536 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 48,124 psi | 75% | 2484 fps | 96.7% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,390 psi | 87% | 2461 fps | 98.1% |
| Bofors RP15 | <<locked>> | 96% | 57,087 psi | 89% | 2523 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,636 psi | 86% | 2526 fps | 99.9% |
| Bofors RP5 | <<locked>> | 92% | 54,259 psi | 85% | 2487 fps | 100% |
| Bofors RP7 | <<locked>> | 84% | 57,682 psi | 90% | 2421 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,261 psi | 90% | 2533 fps | 100% |
| Hodgdon H414 | <<locked>> | 84% | 57,159 psi | 90% | 2470 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,144 psi | 88% | 2434 fps | 100% |
| Hodgdon H4831 | <<locked>> | 92% | 57,566 psi | 90% | 2484 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,492 psi | 89% | 2470 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,797 psi | 89% | 2395 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,508 psi | 90% | 2635 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,653 psi | 90% | 2507 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,434 psi | 59% | 1490 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,883 psi | 88% | 2415 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,535 psi | 87% | 2392 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,999 psi | 88% | 2415 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,969 psi | 86% | 2421 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 94% | 55,840 psi | 88% | 2526 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,076 psi | 66% | 2362 fps | 98.5% |
| Lovex S065 | <<locked>> | 84% | 56,391 psi | 88% | 2392 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,520 psi | 85% | 2392 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,535 psi | 87% | 2418 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,782 psi | 89% | 2464 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 42,221 psi | 66% | 2382 fps | 99.8% |
| Norma MRP | <<locked>> | 90% | 54,143 psi | 85% | 2507 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,696 psi | 90% | 2448 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,681 psi | 89% | 2546 fps | 100% |
| Ramshot Hunter | <<locked>> | 86% | 56,405 psi | 88% | 2461 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,853 psi | 86% | 2484 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,247 psi | 60% | 1526 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,767 psi | 87% | 2444 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 53,969 psi | 85% | 2470 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 54,085 psi | 85% | 2579 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,171 psi | 83% | 2549 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 90% | 57,290 psi | 90% | 2451 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 90% | 55,376 psi | 87% | 2461 fps | 100% |
| Rottweil R 907 | <<locked>> | 84% | 57,682 psi | 90% | 2421 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,391 psi | 88% | 2392 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,520 psi | 85% | 2392 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,506 psi | 87% | 2356 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,955 psi | 86% | 2457 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 55,085 psi | 86% | 2402 fps | 99.4% |
| Somchem S365 | <<locked>> | 86% | 54,781 psi | 86% | 2408 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,796 psi | 87% | 2434 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,420 psi | 88% | 2336 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,782 psi | 87% | 2395 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,521 psi | 87% | 2425 fps | 100% |
| Vihtavuori N170ᴾ | <<locked>> | 100% | 57,580 psi | 90% | 2487 fps | 96.9% |
| Vihtavuori N550 | <<locked>> | 84% | 54,868 psi | 86% | 2405 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 54,360 psi | 85% | 2431 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,580 psi | 90% | 2556 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 98% | 57,450 psi | 90% | 2539 fps | 99.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,317 psi | 85% | 2549 fps | 99.1% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 51,198 psi | 80% | 2543 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,882 psi | 86% | 2359 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,377 psi | 90% | 2474 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,624 psi | 90% | 2575 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,564 psi | 87% | 2434 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 36,666 psi | 57% | 2139 fps | 99.5% |
| Accurate 4350 | <<locked>> | 80% | 48,878 psi | 77% | 2333 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 39,697 psi | 62% | 2287 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 80% | 37,391 psi | 59% | 2234 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 40,596 psi | 64% | 2244 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 80% | 36,216 psi | 57% | 2188 fps | 96.3% |
| ADI AR 2217 | <<locked>> | 86% | 32,837 psi | 51% | 2119 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 82% | 26,165 psi | 41% | 1991 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,702 psi | 73% | 2336 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,683 psi | 64% | 2241 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,463 psi | 57% | 2198 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,215 psi | 55% | 2159 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,560 psi | 48% | 2100 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,725 psi | 61% | 2287 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 44,643 psi | 70% | 2425 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 43,468 psi | 68% | 2270 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 33,953 psi | 53% | 2146 fps | 96.9% |
| Bofors RP30 | <<locked>> | 84% | 31,966 psi | 50% | 2133 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 36,463 psi | 57% | 2198 fps | 97.8% |
| Bofors RP7 | <<locked>> | 80% | 50,908 psi | 80% | 2329 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 31,256 psi | 49% | 2083 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 50,227 psi | 79% | 2379 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 52,721 psi | 83% | 2388 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 38,595 psi | 60% | 2192 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 37,971 psi | 60% | 2178 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,121 psi | 69% | 2234 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 29,791 psi | 47% | 2116 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 49,908 psi | 78% | 2408 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,992 psi | 44% | 1329 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,369 psi | 73% | 2280 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,359 psi | 82% | 2349 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 46,253 psi | 72% | 2287 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,292 psi | 63% | 2188 fps | 97% |
| IMR 7828 SSC | <<locked>> | 80% | 34,853 psi | 55% | 2169 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 92% | 32,401 psi | 51% | 2162 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 49,908 psi | 78% | 2306 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,196 psi | 76% | 2303 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 31,604 psi | 50% | 2037 fps | 98.5% |
| Norma 204 | <<locked>> | 80% | 46,470 psi | 73% | 2320 fps | 99.4% |
| Norma 217 | <<locked>> | 88% | 28,471 psi | 45% | 2087 fps | 96% |
| Norma MRP | <<locked>> | 80% | 38,261 psi | 60% | 2257 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 47,587 psi | 75% | 2320 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 34,447 psi | 54% | 2175 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 80% | 46,325 psi | 73% | 2323 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 30,705 psi | 48% | 2080 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,776 psi | 45% | 1362 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,762 psi | 76% | 2356 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,746 psi | 73% | 2372 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 28,660 psi | 45% | 2093 fps | 96.5% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 36,695 psi | 57% | 2270 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 41,843 psi | 66% | 2221 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 80% | 39,943 psi | 63% | 2228 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 80% | 50,908 psi | 80% | 2329 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,908 psi | 78% | 2306 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,196 psi | 76% | 2303 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,776 psi | 76% | 2267 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,639 psi | 62% | 2221 fps | 98.5% |
| Somchem S361 | <<locked>> | 80% | 42,453 psi | 67% | 2215 fps | 97.4% |
| Somchem S365 | <<locked>> | 80% | 44,889 psi | 70% | 2280 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,553 psi | 64% | 2211 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 80% | 52,895 psi | 83% | 2293 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,139 psi | 77% | 2313 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,259 psi | 55% | 2110 fps | 97.8% |
| Vihtavuori N170 | <<locked>> | 96% | 50,343 psi | 79% | 2388 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 48,312 psi | 76% | 2316 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,407 psi | 62% | 2218 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 38,363 psi | 60% | 2251 fps | 96.6% |
| Vihtavuori N565 | <<locked>> | 82% | 33,707 psi | 53% | 2149 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 90% | 38,261 psi | 60% | 2287 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 96% | 44,541 psi | 70% | 2434 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,950 psi | 75% | 2274 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,430 psi | 79% | 2382 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,401 psi | 49% | 2195 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,043 psi | 58% | 2152 fps | 97.8% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 79 powders for .338 Norma Mag. loaded with the .338 | 300gr | Berger Elite Hunter. Hodgdon Retumbo delivers the highest muzzle velocity at 2,635 fps; across all powders the maximum-charge window runs from 1,490 fps to 2,635 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 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 1:11.0 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. As outliers, Alliant Reloder-50, IMR 7977 Enduron, Lovex D100 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.