Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 240gr | Woodleigh PP SN bullet and 54 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, 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>> | 86% | 56,188 psi | 88% | 2572 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 46,514 psi | 73% | 2549 fps | 96.7% |
| Accurate High Country | <<locked>> | 82% | 54,273 psi | 85% | 2667 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 54,955 psi | 86% | 2674 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 84% | 57,116 psi | 90% | 2648 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,709 psi | 87% | 2667 fps | 100% |
| ADI AR 2217 | <<locked>> | 94% | 54,607 psi | 86% | 2654 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 54,433 psi | 85% | 2772 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 98% | 57,348 psi | 90% | 2726 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 57,435 psi | 90% | 2644 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,840 psi | 89% | 2641 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,246 psi | 88% | 2661 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,694 psi | 86% | 2572 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 54,795 psi | 86% | 2644 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,969 psi | 86% | 2654 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 56,376 psi | 88% | 2753 fps | 99.1% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 55,912 psi | 88% | 2746 fps | 98.7% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,883 psi | 88% | 2638 fps | 99.1% |
| Bofors RP15 | <<locked>> | 88% | 55,622 psi | 87% | 2654 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 54,636 psi | 86% | 2667 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 56,246 psi | 88% | 2661 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 55,956 psi | 88% | 2671 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 54,694 psi | 86% | 2605 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,348 psi | 90% | 2641 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,580 psi | 90% | 2549 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,099 psi | 85% | 2730 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,956 psi | 59% | 1640 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,969 psi | 86% | 2582 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 86% | 54,317 psi | 85% | 2654 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 92% | 57,043 psi | 89% | 2595 fps | 96.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,362 psi | 88% | 2713 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 54,578 psi | 86% | 2552 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,012 psi | 85% | 2680 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,434 psi | 88% | 2677 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,550 psi | 87% | 2677 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 53,766 psi | 84% | 2612 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,001 psi | 61% | 1680 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,534 psi | 85% | 2720 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 57,696 psi | 90% | 2753 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 57,653 psi | 90% | 2618 fps | 100% |
| Rottweil R 905 | <<locked>> | 84% | 56,695 psi | 89% | 2631 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 48,675 psi | 76% | 2559 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,333 psi | 88% | 2628 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,158 psi | 86% | 2566 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 56,927 psi | 89% | 2602 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,869 psi | 89% | 2595 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 55,709 psi | 87% | 2628 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 84% | 56,521 psi | 89% | 2598 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,840 psi | 88% | 2684 fps | 100% |
| Vihtavuori N565 | <<locked>> | 90% | 56,739 psi | 89% | 2680 fps | 100% |
| Vihtavuori N568 | <<locked>> | 92% | 54,476 psi | 85% | 2697 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 94% | 55,651 psi | 87% | 2756 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,781 psi | 86% | 2657 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,478 psi | 89% | 2602 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% | 46,021 psi | 72% | 2425 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 43,294 psi | 68% | 2490 fps | 95.8% |
| Accurate High Country | <<locked>> | 80% | 50,705 psi | 79% | 2612 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 80% | 47,892 psi | 75% | 2562 fps | 99% |
| ADI AR 2209 | <<locked>> | 80% | 50,096 psi | 79% | 2543 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 45,368 psi | 71% | 2503 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 80% | 33,881 psi | 53% | 2274 fps | 96.9% |
| ADI AR 2218 | 86.8 gr | 90% | 40,886 psi | 64% | 2510 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 31,198 psi | 49% | 2254 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 50,401 psi | 79% | 2543 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,922 psi | 78% | 2536 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,122 psi | 72% | 2503 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,063 psi | 71% | 2438 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,088 psi | 61% | 2395 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 51,198 psi | 80% | 2598 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 39,073 psi | 61% | 2444 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 92% | 41,785 psi | 65% | 2497 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,337 psi | 68% | 2425 fps | 96.7% |
| Bofors RP15 | <<locked>> | 80% | 42,960 psi | 67% | 2448 fps | 99.5% |
| Bofors RP30 | <<locked>> | 80% | 36,535 psi | 57% | 2346 fps | 97.9% |
| Bofors RP5 | <<locked>> | 80% | 46,122 psi | 72% | 2503 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 36,796 psi | 58% | 2343 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 80% | 47,848 psi | 75% | 2497 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,992 psi | 74% | 2484 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 54,157 psi | 85% | 2507 fps | 100% |
| Hodgdon Retumbo | 72.8 gr | 80% | 38,232 psi | 60% | 2451 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,529 psi | 45% | 1463 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,515 psi | 76% | 2480 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 80% | 44,164 psi | 69% | 2487 fps | 99.2% |
| IMR 7977 Enduron | <<locked>> | 88% | 50,227 psi | 79% | 2487 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 82% | 30,835 psi | 48% | 2231 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 39,900 psi | 63% | 2320 fps | 100% |
| Norma 217 | <<locked>> | 80% | 29,066 psi | 46% | 2201 fps | 97.1% |
| Norma MRP | <<locked>> | 80% | 49,139 psi | 77% | 2569 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 44,512 psi | 70% | 2503 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 80% | 40,016 psi | 63% | 2388 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,385 psi | 46% | 1499 fps | 100% |
| ReloadSwiss RS 76 | 77.9 gr | 80% | 37,434 psi | 59% | 2428 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 34,418 psi | 54% | 2329 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 50,734 psi | 80% | 2516 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 49,763 psi | 78% | 2530 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 42,482 psi | 67% | 2451 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,443 psi | 77% | 2526 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 51,721 psi | 81% | 2513 fps | 99.6% |
| Somchem S385 | <<locked>> | 80% | 49,980 psi | 78% | 2503 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 43,845 psi | 69% | 2398 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 86% | 45,658 psi | 72% | 2461 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 49,705 psi | 78% | 2503 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,689 psi | 76% | 2572 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 80% | 40,669 psi | 64% | 2411 fps | 98.3% |
| Vihtavuori N568 | <<locked>> | 80% | 35,723 psi | 56% | 2346 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 86% | 41,916 psi | 66% | 2510 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,961 psi | 69% | 2503 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,209 psi | 72% | 2448 fps | 99.8% |
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 54 powders for .300 Norma Mag. loaded with the .308 | 240gr | Woodleigh PP SN. ADI AR 2218 delivers the highest muzzle velocity at 2,772 fps; across all powders the maximum-charge window runs from 1,640 fps to 2,772 fps. Accurate 8700 gives the best case fill at 100 %, and 54 of the 54 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 240.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Alliant Reloder-50, Hodgdon TrailBoss 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. ADI AR 2218, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .300 Norma Mag. with the .308 | 240gr | Woodleigh PP SN 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.