Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 220gr | Rhino Solid Shank bullet and 73 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 Winchester StaBALL HD.
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>> | 92% | 54,230 psi | 85% | 2615 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,535 psi | 87% | 2635 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 56,695 psi | 89% | 2762 fps | 99% |
| ADI AR 2209 | <<locked>> | 90% | 56,246 psi | 88% | 2697 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 53,925 psi | 85% | 2703 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,764 psi | 81% | 2667 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,325 psi | 73% | 2638 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,507 psi | 89% | 2684 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,624 psi | 90% | 2697 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,796 psi | 87% | 2687 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,157 psi | 85% | 2700 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,506 psi | 87% | 2667 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 54,824 psi | 86% | 2730 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 55,767 psi | 87% | 2753 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,448 psi | 87% | 2671 fps | 97.3% |
| Bofors RP15 | <<locked>> | 96% | 56,797 psi | 89% | 2736 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,563 psi | 86% | 2736 fps | 99.6% |
| Bofors RP5 | <<locked>> | 92% | 54,157 psi | 85% | 2700 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 57,522 psi | 90% | 2635 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,058 psi | 89% | 2746 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 84% | 57,058 psi | 89% | 2687 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,869 psi | 88% | 2644 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 92% | 57,580 psi | 90% | 2700 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,391 psi | 88% | 2680 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,768 psi | 89% | 2612 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,479 psi | 90% | 2858 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,551 psi | 90% | 2726 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,376 psi | 59% | 1637 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,695 psi | 87% | 2625 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,463 psi | 87% | 2605 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,796 psi | 87% | 2628 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,824 psi | 86% | 2628 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 55,666 psi | 87% | 2740 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,959 psi | 66% | 2552 fps | 97.6% |
| Lovex S065 | <<locked>> | 84% | 56,231 psi | 88% | 2605 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,476 psi | 85% | 2605 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,637 psi | 87% | 2631 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,594 psi | 89% | 2677 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 42,177 psi | 66% | 2575 fps | 99.3% |
| Norma MRP | <<locked>> | 90% | 53,911 psi | 84% | 2717 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,435 psi | 90% | 2667 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,391 psi | 88% | 2759 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 86% | 56,202 psi | 88% | 2677 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,694 psi | 86% | 2697 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,232 psi | 60% | 1677 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,448 psi | 87% | 2657 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,624 psi | 90% | 2736 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 54,070 psi | 85% | 2799 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,113 psi | 83% | 2756 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 90% | 57,305 psi | 90% | 2667 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 90% | 55,259 psi | 87% | 2674 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 57,522 psi | 90% | 2635 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,231 psi | 88% | 2605 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,476 psi | 85% | 2605 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,158 psi | 86% | 2562 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,839 psi | 86% | 2671 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 55,071 psi | 86% | 2612 fps | 98.9% |
| Somchem S365 | <<locked>> | 86% | 54,563 psi | 86% | 2621 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,695 psi | 87% | 2648 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,130 psi | 88% | 2546 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,608 psi | 87% | 2612 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,332 psi | 87% | 2635 fps | 100% |
| Vihtavuori N170ᴾ | <<locked>> | 100% | 57,696 psi | 90% | 2700 fps | 96% |
| Vihtavuori N550 | <<locked>> | 84% | 54,723 psi | 86% | 2615 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,725 psi | 90% | 2694 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,653 psi | 90% | 2776 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 98% | 57,479 psi | 90% | 2756 fps | 99.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,201 psi | 85% | 2759 fps | 98.4% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 51,271 psi | 80% | 2749 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,897 psi | 86% | 2572 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,305 psi | 90% | 2690 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,682 psi | 90% | 2802 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,622 psi | 87% | 2648 fps | 99.8% |
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% | 36,463 psi | 57% | 2316 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 48,617 psi | 76% | 2536 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 39,972 psi | 63% | 2470 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 40,335 psi | 63% | 2428 fps | 97.7% |
| ADI AR 2213 | <<locked>> | 80% | 36,143 psi | 57% | 2365 fps | 95% |
| ADI AR 2217 | <<locked>> | 90% | 37,202 psi | 58% | 2395 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 86% | 29,544 psi | 46% | 2251 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,601 psi | 73% | 2543 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,650 psi | 84% | 2644 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,495 psi | 63% | 2428 fps | 97.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,376 psi | 57% | 2379 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,012 psi | 55% | 2336 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,327 psi | 48% | 2260 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,609 psi | 61% | 2477 fps | 99.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 46,006 psi | 72% | 2510 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 33,837 psi | 53% | 2316 fps | 95.6% |
| Bofors RP30 | <<locked>> | 86% | 34,069 psi | 53% | 2356 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 36,376 psi | 57% | 2379 fps | 96.7% |
| Bofors RP7 | <<locked>> | 80% | 50,763 psi | 80% | 2533 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 86% | 35,563 psi | 56% | 2359 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 50,038 psi | 78% | 2585 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 52,576 psi | 82% | 2595 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 38,522 psi | 60% | 2372 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 37,869 psi | 59% | 2359 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,801 psi | 69% | 2428 fps | 100% |
| Hodgdon Retumbo | 64.3 gr | 82% | 31,691 psi | 50% | 2336 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 49,879 psi | 78% | 2615 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,963 psi | 44% | 1460 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,108 psi | 72% | 2474 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,040 psi | 82% | 2556 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 46,137 psi | 72% | 2487 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,074 psi | 63% | 2372 fps | 96% |
| IMR 7828 SSC | <<locked>> | 82% | 37,144 psi | 58% | 2402 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 96% | 36,738 psi | 58% | 2438 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 49,676 psi | 78% | 2510 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,080 psi | 75% | 2507 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 31,502 psi | 49% | 2205 fps | 97.5% |
| Norma 204 | <<locked>> | 80% | 46,325 psi | 73% | 2516 fps | 98.8% |
| Norma 217 | <<locked>> | 90% | 30,255 psi | 47% | 2300 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 38,058 psi | 60% | 2441 fps | 98.5% |
| Norma URP | <<locked>> | 80% | 47,471 psi | 74% | 2520 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 36,840 psi | 58% | 2408 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 46,224 psi | 72% | 2523 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 30,501 psi | 48% | 2241 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,616 psi | 45% | 1496 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,573 psi | 76% | 2559 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,514 psi | 73% | 2575 fps | 100% |
| ReloadSwiss RS 76 | 68.8 gr | 82% | 30,647 psi | 48% | 2313 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 39,378 psi | 62% | 2507 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 41,713 psi | 65% | 2408 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 80% | 39,842 psi | 62% | 2411 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 80% | 50,763 psi | 80% | 2533 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,676 psi | 78% | 2510 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,080 psi | 75% | 2507 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,573 psi | 76% | 2464 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,508 psi | 62% | 2408 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 42,279 psi | 66% | 2398 fps | 96.4% |
| Somchem S365 | <<locked>> | 80% | 44,614 psi | 70% | 2480 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,466 psi | 63% | 2398 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 80% | 52,765 psi | 83% | 2500 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,921 psi | 77% | 2516 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,085 psi | 55% | 2283 fps | 96.8% |
| Vihtavuori N170 | <<locked>> | 98% | 53,780 psi | 84% | 2638 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 48,095 psi | 75% | 2520 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,363 psi | 62% | 2408 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 38,159 psi | 60% | 2431 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 86% | 38,464 psi | 60% | 2428 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 92% | 40,843 psi | 64% | 2523 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 98% | 47,659 psi | 75% | 2687 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,819 psi | 75% | 2477 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,256 psi | 79% | 2585 fps | 99.9% |
| Winchester StaBALL HD | 64.4 gr | 80% | 31,241 psi | 49% | 2369 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,898 psi | 58% | 2329 fps | 96.8% |
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 77 powders for .300 Weath. Mag. loaded with the .308 | 220gr | Rhino Solid Shank. Hodgdon Retumbo delivers the highest muzzle velocity at 2,858 fps; across all powders the maximum-charge window runs from 1,637 fps to 2,858 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 220.0 gr projectile in 0.308" calls for a 1:12.0 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. Hodgdon Retumbo, ReloadSwiss RS 76, Winchester StaBALL HD rank at the top here: for .300 Weath. Mag. with the .308 | 220gr | Rhino Solid Shank they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-50, IMR 7977 Enduron 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.