Load Specifications
Load data in caliber .338 Norma Mag. with .338 | 275gr | CutEdge MTH bullet and 82 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Norma MRP and Accurate MAGPRO.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 55,376 psi | 87% | 2526 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 57,000 psi | 89% | 2549 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 53,925 psi | 85% | 2618 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 82% | 55,259 psi | 87% | 2470 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,302 psi | 85% | 2559 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 96% | 55,593 psi | 87% | 2618 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,383 psi | 73% | 2474 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,930 psi | 64% | 2438 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,679 psi | 86% | 2559 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,679 psi | 86% | 2559 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,420 psi | 88% | 2487 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,505 psi | 85% | 2556 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,579 psi | 87% | 2569 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,450 psi | 90% | 2602 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,288 psi | 87% | 2612 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,492 psi | 89% | 2579 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 2589 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,985 psi | 89% | 2667 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 57,551 psi | 90% | 2585 fps | 97.4% |
| Bofors RP15 | <<locked>> | 98% | 54,447 psi | 85% | 2598 fps | 99.8% |
| Bofors RP3 | <<locked>> | 82% | 57,217 psi | 90% | 2500 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,906 psi | 75% | 2536 fps | 98.8% |
| Bofors RP5 | <<locked>> | 96% | 55,288 psi | 87% | 2612 fps | 99.9% |
| Bofors RP7 | <<locked>> | 86% | 56,362 psi | 88% | 2510 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,169 psi | 80% | 2552 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 82% | 57,290 psi | 90% | 2523 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,288 psi | 87% | 2556 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 54,737 psi | 86% | 2520 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 94% | 55,796 psi | 87% | 2562 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,694 psi | 86% | 2549 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,853 psi | 86% | 2487 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,865 psi | 80% | 2651 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 55,637 psi | 87% | 2595 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,869 psi | 58% | 1545 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,230 psi | 85% | 2497 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,462 psi | 85% | 2484 fps | 100% |
| IMR 4831 | <<locked>> | 90% | 57,435 psi | 90% | 2543 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,927 psi | 89% | 2546 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 98% | 57,217 psi | 90% | 2651 fps | 99.6% |
| Lovex S065 | <<locked>> | 86% | 54,708 psi | 86% | 2477 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,420 psi | 88% | 2523 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,707 psi | 83% | 2493 fps | 100% |
| Norma 204 | <<locked>> | 88% | 55,085 psi | 86% | 2549 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 36,390 psi | 57% | 2369 fps | 98% |
| Norma MRP | <<locked>> | 94% | 55,129 psi | 86% | 2631 fps | 100% |
| Norma URP | <<locked>> | 88% | 55,782 psi | 87% | 2539 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,824 psi | 84% | 2615 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 88% | 54,433 psi | 85% | 2546 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,043 psi | 88% | 2608 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,739 psi | 59% | 1585 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,116 psi | 90% | 2516 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,230 psi | 87% | 2556 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,116 psi | 90% | 2575 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,550 psi | 87% | 2605 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,242 psi | 80% | 2648 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 45,977 psi | 72% | 2543 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 84% | 57,551 psi | 90% | 2500 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,782 psi | 87% | 2533 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 94% | 56,869 psi | 89% | 2589 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 56,362 psi | 88% | 2510 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,708 psi | 86% | 2477 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,420 psi | 88% | 2523 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,521 psi | 87% | 2510 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,566 psi | 90% | 2382 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,667 psi | 90% | 2487 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,420 psi | 88% | 2585 fps | 99.9% |
| Somchem S355 | <<locked>> | 84% | 57,145 psi | 90% | 2493 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,159 psi | 90% | 2530 fps | 99% |
| Somchem S365 | <<locked>> | 90% | 55,883 psi | 88% | 2539 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,363 psi | 90% | 2566 fps | 100% |
| Vihtavuori N150 | <<locked>> | 84% | 54,969 psi | 86% | 2428 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,537 psi | 90% | 2530 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,753 psi | 89% | 2546 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 56,550 psi | 89% | 2536 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,085 psi | 86% | 2556 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,114 psi | 86% | 2631 fps | 99.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,331 psi | 85% | 2605 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 47,369 psi | 74% | 2549 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,145 psi | 90% | 2497 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,506 psi | 87% | 2559 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 53,606 psi | 84% | 2654 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,479 psi | 90% | 2562 fps | 99.9% |
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% | 31,937 psi | 50% | 2139 fps | 97.7% |
| Accurate 4350 | <<locked>> | 80% | 43,352 psi | 68% | 2359 fps | 100% |
| Accurate MAGPRO | 75.8 gr | 86% | 40,611 psi | 64% | 2395 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 51,967 psi | 81% | 2425 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 36,492 psi | 57% | 2257 fps | 96.5% |
| ADI AR 2213 | <<locked>> | 84% | 37,086 psi | 58% | 2297 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 94% | 37,985 psi | 60% | 2316 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 90% | 29,646 psi | 46% | 2175 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 36,695 psi | 57% | 2257 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 36,695 psi | 57% | 2257 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,852 psi | 83% | 2444 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,959 psi | 66% | 2372 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,370 psi | 76% | 2474 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 36,376 psi | 57% | 2254 fps | 96.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 32,068 psi | 50% | 2198 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,922 psi | 48% | 2169 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 26,948 psi | 42% | 2090 fps | 96.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,475 psi | 52% | 2290 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 47,877 psi | 75% | 2434 fps | 95.2% |
| Bofors RP15 | <<locked>> | 84% | 34,229 psi | 54% | 2247 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 53,505 psi | 84% | 2457 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 33,997 psi | 53% | 2274 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 32,068 psi | 50% | 2198 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 46,601 psi | 73% | 2369 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 90% | 36,274 psi | 57% | 2283 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 53,809 psi | 84% | 2480 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,223 psi | 71% | 2408 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 47,979 psi | 75% | 2421 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 39,566 psi | 62% | 2303 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 84% | 38,899 psi | 61% | 2290 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,508 psi | 62% | 2267 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 32,024 psi | 50% | 2264 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 44,527 psi | 70% | 2431 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,543 psi | 43% | 1378 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,235 psi | 66% | 2313 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,051 psi | 75% | 2392 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 41,481 psi | 65% | 2316 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 38,928 psi | 61% | 2257 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 86% | 38,029 psi | 60% | 2329 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 45,513 psi | 71% | 2346 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 43,743 psi | 69% | 2336 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 27,412 psi | 43% | 2031 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 41,989 psi | 66% | 2343 fps | 97.9% |
| Norma 217 | <<locked>> | 94% | 29,834 psi | 47% | 2211 fps | 95.2% |
| Norma MRP | 69.2 gr | 80% | 33,460 psi | 52% | 2257 fps | 97.1% |
| Norma URP | <<locked>> | 80% | 42,888 psi | 67% | 2352 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 35,027 psi | 55% | 2280 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 41,713 psi | 65% | 2352 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 30,922 psi | 48% | 2172 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,224 psi | 44% | 1414 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,563 psi | 84% | 2470 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,401 psi | 81% | 2507 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,366 psi | 68% | 2382 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,640 psi | 65% | 2398 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 30,922 psi | 48% | 2238 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 39,552 psi | 62% | 2421 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 50,488 psi | 79% | 2411 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 37,869 psi | 59% | 2241 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 35,563 psi | 56% | 2238 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 80% | 46,601 psi | 73% | 2369 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,513 psi | 71% | 2346 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 43,743 psi | 69% | 2336 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,025 psi | 82% | 2467 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,995 psi | 80% | 2303 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,512 psi | 70% | 2300 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 35,259 psi | 55% | 2234 fps | 96.3% |
| Somchem S355 | <<locked>> | 80% | 50,517 psi | 79% | 2411 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 38,261 psi | 60% | 2231 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 39,769 psi | 62% | 2316 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,027 psi | 56% | 2224 fps | 97.4% |
| Vihtavuori N150 | <<locked>> | 80% | 48,298 psi | 76% | 2343 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,266 psi | 69% | 2346 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 31,140 psi | 49% | 2113 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 43,671 psi | 68% | 2352 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 34,563 psi | 54% | 2234 fps | 99.7% |
| Vihtavuori N560 | 72.7 gr | 84% | 39,001 psi | 61% | 2359 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 90% | 38,551 psi | 60% | 2346 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 96% | 41,249 psi | 65% | 2438 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,366 psi | 68% | 2316 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,411 psi | 71% | 2411 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,238 psi | 43% | 2182 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 32,808 psi | 51% | 2156 fps | 95.2% |
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 82 powders for .338 Norma Mag. loaded with the .338 | 275gr | CutEdge MTH. Alliant Reloder-26 delivers the highest muzzle velocity at 2,667 fps; across all powders the maximum-charge window runs from 1,545 fps to 2,667 fps. ADI AR 2217 gives the best case fill at 100 %, and 82 of the 82 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 275.0 gr projectile in 0.338" calls for a 1:10.0 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. Vihtavuori N560, Norma MRP, Accurate MAGPRO rank at the top here: for .338 Norma Mag. with the .338 | 275gr | CutEdge MTH 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.