Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 240gr | Woodleigh PP SN bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and ReloadSwiss RS 80.
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>> | 90% | 54,955 psi | 86% | 2513 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,072 psi | 88% | 2530 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 57,522 psi | 90% | 2667 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 88% | 56,681 psi | 89% | 2595 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 54,607 psi | 86% | 2605 fps | 99.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 56,289 psi | 88% | 2631 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 48,805 psi | 76% | 2615 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 50,749 psi | 80% | 2605 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 56,927 psi | 89% | 2592 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,014 psi | 89% | 2575 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,275 psi | 88% | 2585 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 54,998 psi | 86% | 2602 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 56,507 psi | 89% | 2562 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 56,144 psi | 88% | 2631 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 57,014 psi | 89% | 2648 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 53,142 psi | 83% | 2664 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 55,434 psi | 87% | 2572 fps | 98.3% |
| Bofors RP15 | <<locked>> | 92% | 54,201 psi | 85% | 2592 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 55,869 psi | 88% | 2644 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 54,998 psi | 86% | 2602 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 57,464 psi | 90% | 2526 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 54,244 psi | 85% | 2602 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 57,217 psi | 90% | 2579 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 54,288 psi | 85% | 2549 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 56,855 psi | 89% | 2585 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,174 psi | 90% | 2503 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 54,984 psi | 86% | 2707 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,637 psi | 59% | 1575 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,883 psi | 88% | 2520 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 56,246 psi | 88% | 2520 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,042 psi | 86% | 2530 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 92% | 56,579 psi | 89% | 2641 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 46,441 psi | 73% | 2530 fps | 99.3% |
| Lovex S065 | <<locked>> | 82% | 56,246 psi | 88% | 2497 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,621 psi | 86% | 2500 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 56,333 psi | 88% | 2533 fps | 100% |
| Norma 204 | <<locked>> | 84% | 56,942 psi | 89% | 2575 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 46,992 psi | 74% | 2549 fps | 100% |
| Norma MRP | <<locked>> | 88% | 54,984 psi | 86% | 2618 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,375 psi | 85% | 2513 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 57,696 psi | 90% | 2664 fps | 100% |
| Ramshot Hunter | <<locked>> | 84% | 56,753 psi | 89% | 2572 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 55,709 psi | 87% | 2598 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,551 psi | 60% | 1614 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 55,927 psi | 88% | 2549 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 54,476 psi | 85% | 2579 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 55,419 psi | 87% | 2703 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 54,694 psi | 86% | 2674 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 88% | 57,508 psi | 90% | 2566 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 88% | 55,796 psi | 87% | 2572 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 57,464 psi | 90% | 2526 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,246 psi | 88% | 2497 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,621 psi | 86% | 2500 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,100 psi | 86% | 2457 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,419 psi | 87% | 2572 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 55,172 psi | 86% | 2513 fps | 99.5% |
| Somchem S365 | <<locked>> | 84% | 55,332 psi | 87% | 2516 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,231 psi | 88% | 2549 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 55,898 psi | 88% | 2503 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 55,927 psi | 88% | 2536 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 54,534 psi | 85% | 2556 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 82% | 55,100 psi | 86% | 2510 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,100 psi | 86% | 2543 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 54,650 psi | 86% | 2621 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 94% | 54,897 psi | 86% | 2612 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 98% | 55,477 psi | 87% | 2671 fps | 99.3% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 56,637 psi | 89% | 2730 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 54,868 psi | 86% | 2461 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,464 psi | 90% | 2582 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 55,347 psi | 87% | 2648 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 55,912 psi | 88% | 2546 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% | 39,566 psi | 62% | 2280 fps | 99.8% |
| Accurate 4350 | <<locked>> | 80% | 52,373 psi | 82% | 2480 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 40,524 psi | 64% | 2385 fps | 96.6% |
| ADI AR 2209 | <<locked>> | 80% | 43,642 psi | 68% | 2392 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 80% | 38,957 psi | 61% | 2339 fps | 97.3% |
| ADI AR 2217 | <<locked>> | 84% | 33,112 psi | 52% | 2211 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 98% | 45,397 psi | 71% | 2549 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 26,455 psi | 41% | 2080 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 43,932 psi | 69% | 2388 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,256 psi | 79% | 2484 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,526 psi | 68% | 2385 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,494 psi | 62% | 2346 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,247 psi | 60% | 2293 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,098 psi | 52% | 2241 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,569 psi | 67% | 2441 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 42,641 psi | 67% | 2484 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 43,352 psi | 68% | 2369 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 36,767 psi | 58% | 2290 fps | 97.7% |
| Bofors RP30 | <<locked>> | 82% | 32,721 psi | 51% | 2231 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 39,494 psi | 62% | 2346 fps | 98.6% |
| Bofors RP7 | <<locked>> | 80% | 53,882 psi | 84% | 2477 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 31,488 psi | 49% | 2175 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 53,650 psi | 84% | 2530 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 41,495 psi | 65% | 2339 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,814 psi | 64% | 2326 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,326 psi | 74% | 2375 fps | 100% |
| Hodgdon Retumbo | 62.9 gr | 80% | 32,227 psi | 51% | 2267 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,224 psi | 44% | 1404 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,356 psi | 77% | 2428 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 49,545 psi | 78% | 2431 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,946 psi | 67% | 2336 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 80% | 37,724 psi | 59% | 2323 fps | 97% |
| IMR 8133 Enduron | <<locked>> | 90% | 33,286 psi | 52% | 2267 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 52,794 psi | 83% | 2448 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,256 psi | 80% | 2451 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,214 psi | 54% | 2172 fps | 99.1% |
| Norma 204 | <<locked>> | 80% | 49,690 psi | 78% | 2470 fps | 99.7% |
| Norma 217 | <<locked>> | 84% | 27,383 psi | 43% | 2133 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 41,568 psi | 65% | 2408 fps | 99.7% |
| Norma URP | <<locked>> | 80% | 50,908 psi | 80% | 2464 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,405 psi | 59% | 2329 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 80% | 49,690 psi | 78% | 2474 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,417 psi | 52% | 2224 fps | 97.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,935 psi | 45% | 1437 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,373 psi | 82% | 2503 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,647 psi | 79% | 2526 fps | 100% |
| ReloadSwiss RS 76 | 67.4 gr | 80% | 31,256 psi | 49% | 2244 fps | 97.8% |
| ReloadSwiss RS 80 | 74.7 gr | 88% | 37,666 psi | 59% | 2379 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 44,628 psi | 70% | 2369 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 80% | 43,033 psi | 67% | 2375 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 80% | 53,882 psi | 84% | 2477 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,794 psi | 83% | 2448 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,256 psi | 80% | 2451 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,634 psi | 81% | 2408 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,699 psi | 67% | 2369 fps | 99.1% |
| Somchem S361 | <<locked>> | 80% | 45,368 psi | 71% | 2362 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 48,515 psi | 76% | 2425 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,540 psi | 68% | 2356 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 52,344 psi | 82% | 2457 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,927 psi | 59% | 2251 fps | 98.6% |
| Vihtavuori N170 | <<locked>> | 94% | 51,111 psi | 80% | 2503 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 51,677 psi | 81% | 2464 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,772 psi | 67% | 2362 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,481 psi | 65% | 2402 fps | 97.5% |
| Vihtavuori N565 | <<locked>> | 80% | 34,316 psi | 54% | 2244 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 88% | 39,073 psi | 61% | 2392 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 94% | 45,818 psi | 72% | 2552 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,488 psi | 81% | 2418 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,838 psi | 84% | 2533 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,259 psi | 55% | 2343 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,842 psi | 62% | 2293 fps | 98.5% |
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 71 powders for .300 Weath. Mag. loaded with the .308 | 240gr | Woodleigh PP SN. Vihtavuori N570 delivers the highest muzzle velocity at 2,730 fps; across all powders the maximum-charge window runs from 1,575 fps to 2,730 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 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. 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. Hodgdon Retumbo, ReloadSwiss RS 76, ReloadSwiss RS 80 rank at the top here: for .300 Weath. 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.