Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets bullet and 80 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Ramshot Grand 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% | 55,869 psi | 88% | 2762 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 57,508 psi | 90% | 2795 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,650 psi | 86% | 2858 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 82% | 55,448 psi | 87% | 2707 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,926 psi | 86% | 2802 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 96% | 56,173 psi | 88% | 2861 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,847 psi | 73% | 2700 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,539 psi | 65% | 2657 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,739 psi | 89% | 2730 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,955 psi | 86% | 2799 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,101 psi | 88% | 2815 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,433 psi | 85% | 2792 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,927 psi | 88% | 2854 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,029 psi | 89% | 2822 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,562 psi | 82% | 2828 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,711 psi | 90% | 2917 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 54,650 psi | 86% | 2769 fps | 96% |
| Bofors RP15 | <<locked>> | 98% | 55,042 psi | 86% | 2841 fps | 99.5% |
| Bofors RP3 | <<locked>> | 82% | 57,566 psi | 90% | 2743 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,646 psi | 76% | 2769 fps | 98.2% |
| Bofors RP5 | <<locked>> | 96% | 55,927 psi | 88% | 2854 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 56,623 psi | 89% | 2746 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,706 psi | 81% | 2789 fps | 99% |
| Hodgdon H380 | <<locked>> | 82% | 57,696 psi | 90% | 2769 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,753 psi | 87% | 2799 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 55,027 psi | 86% | 2759 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 94% | 56,188 psi | 88% | 2802 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,230 psi | 87% | 2789 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,216 psi | 87% | 2726 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,590 psi | 81% | 2894 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 86% | 56,275 psi | 88% | 2838 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,956 psi | 58% | 1716 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,795 psi | 86% | 2736 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,766 psi | 86% | 2720 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 54,360 psi | 85% | 2740 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,276 psi | 90% | 2785 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 96% | 53,867 psi | 84% | 2838 fps | 98.7% |
| Lovex S065 | <<locked>> | 86% | 55,158 psi | 86% | 2717 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,753 psi | 89% | 2762 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,258 psi | 83% | 2726 fps | 100% |
| Norma 204 | <<locked>> | 88% | 55,651 psi | 87% | 2789 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 37,014 psi | 58% | 2579 fps | 97.1% |
| Norma MRP | <<locked>> | 94% | 55,927 psi | 88% | 2877 fps | 100% |
| Norma URP | <<locked>> | 88% | 56,159 psi | 88% | 2782 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,476 psi | 85% | 2858 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 54,984 psi | 86% | 2789 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,768 psi | 89% | 2851 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,710 psi | 59% | 1755 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,450 psi | 90% | 2756 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,753 psi | 87% | 2802 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,624 psi | 90% | 2822 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,043 psi | 88% | 2851 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 2890 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 46,731 psi | 73% | 2769 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 82% | 54,172 psi | 85% | 2694 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,304 psi | 88% | 2776 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 94% | 57,479 psi | 90% | 2835 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 86% | 56,623 psi | 89% | 2746 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,158 psi | 86% | 2717 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,753 psi | 89% | 2762 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,825 psi | 87% | 2753 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,476 psi | 85% | 2575 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,389 psi | 85% | 2674 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,014 psi | 89% | 2831 fps | 99.7% |
| Somchem S355 | <<locked>> | 84% | 57,638 psi | 90% | 2740 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,012 psi | 85% | 2713 fps | 97.9% |
| Somchem S365 | <<locked>> | 90% | 56,318 psi | 88% | 2782 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,302 psi | 85% | 2753 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 84% | 55,317 psi | 87% | 2664 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,462 psi | 85% | 2726 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,450 psi | 90% | 2785 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 56,985 psi | 89% | 2779 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,608 psi | 87% | 2799 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,854 psi | 88% | 2874 fps | 98.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,143 psi | 86% | 2848 fps | 98.6% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 48,153 psi | 75% | 2779 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,696 psi | 90% | 2736 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,985 psi | 88% | 2802 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,433 psi | 85% | 2904 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,085 psi | 85% | 2749 fps | 99.3% |
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% | 32,256 psi | 51% | 2333 fps | 96.7% |
| Accurate 4350 | <<locked>> | 80% | 43,787 psi | 69% | 2582 fps | 100% |
| Accurate MAGPRO | 73.5 gr | 88% | 44,092 psi | 69% | 2671 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 52,127 psi | 82% | 2661 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 36,637 psi | 57% | 2461 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 86% | 39,987 psi | 63% | 2562 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 96% | 40,944 psi | 64% | 2582 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 92% | 31,981 psi | 50% | 2418 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,142 psi | 83% | 2680 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,177 psi | 66% | 2592 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,617 psi | 76% | 2707 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 36,709 psi | 58% | 2457 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,159 psi | 58% | 2510 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,111 psi | 49% | 2362 fps | 99.3% |
| Alliant Reloder-25 | <<locked>> | 82% | 28,979 psi | 45% | 2326 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,837 psi | 53% | 2490 fps | 98.6% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 51,459 psi | 81% | 2713 fps | 95.2% |
| Bofors RP15 | <<locked>> | 86% | 36,840 psi | 58% | 2500 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 53,838 psi | 84% | 2694 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 39,508 psi | 62% | 2592 fps | 95.8% |
| Bofors RP5 | <<locked>> | 84% | 37,159 psi | 58% | 2510 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 46,862 psi | 73% | 2592 fps | 99% |
| Hodgdon H1000 | <<locked>> | 92% | 39,276 psi | 62% | 2549 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 54,027 psi | 85% | 2717 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,629 psi | 72% | 2631 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 48,269 psi | 76% | 2648 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 86% | 42,714 psi | 67% | 2569 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 41,989 psi | 66% | 2556 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,668 psi | 62% | 2480 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 34,447 psi | 54% | 2516 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 45,049 psi | 71% | 2657 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,630 psi | 43% | 1532 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,366 psi | 66% | 2526 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,327 psi | 76% | 2615 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 41,669 psi | 65% | 2533 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 41,727 psi | 65% | 2516 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 88% | 41,002 psi | 64% | 2595 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 45,730 psi | 72% | 2566 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 44,048 psi | 69% | 2556 fps | 99% |
| Lovex S071 | <<locked>> | 82% | 29,501 psi | 46% | 2264 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 42,264 psi | 66% | 2559 fps | 97.1% |
| Norma 217 | <<locked>> | 96% | 32,329 psi | 51% | 2461 fps | 95% |
| Norma MRP | <<locked>> | 80% | 33,779 psi | 53% | 2457 fps | 96% |
| Norma URP | <<locked>> | 80% | 43,192 psi | 68% | 2572 fps | 99.9% |
| Ramshot Grand | 71.5 gr | 88% | 40,654 psi | 64% | 2605 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 41,974 psi | 66% | 2569 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 33,576 psi | 53% | 2425 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,195 psi | 44% | 1568 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,896 psi | 84% | 2707 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,706 psi | 81% | 2746 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,772 psi | 69% | 2605 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,148 psi | 66% | 2621 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 33,576 psi | 53% | 2493 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 43,279 psi | 68% | 2703 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 50,821 psi | 80% | 2648 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 40,625 psi | 64% | 2500 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 35,868 psi | 56% | 2441 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 46,862 psi | 73% | 2592 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,730 psi | 72% | 2566 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 44,048 psi | 69% | 2556 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,301 psi | 82% | 2703 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,169 psi | 80% | 2533 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,701 psi | 70% | 2516 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 35,549 psi | 56% | 2434 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 50,763 psi | 80% | 2641 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 44,208 psi | 69% | 2546 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 39,943 psi | 63% | 2530 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,289 psi | 57% | 2425 fps | 96.5% |
| Vihtavuori N150 | <<locked>> | 80% | 48,617 psi | 76% | 2569 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,701 psi | 70% | 2572 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 33,576 psi | 53% | 2359 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 43,859 psi | 69% | 2572 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 34,809 psi | 55% | 2434 fps | 99.3% |
| Vihtavuori N560 | 70.5 gr | 86% | 42,119 psi | 66% | 2631 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 92% | 41,756 psi | 65% | 2612 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 98% | 44,889 psi | 70% | 2720 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,569 psi | 68% | 2533 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,832 psi | 72% | 2638 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,441 psi | 43% | 2365 fps | 99.3% |
| Winchester Supreme 780 | <<locked>> | 82% | 35,549 psi | 56% | 2408 fps | 95.1% |
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 80 powders for .300 Weath. Mag. loaded with the .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets. Alliant Reloder-26 delivers the highest muzzle velocity at 2,917 fps; across all powders the maximum-charge window runs from 1,716 fps to 2,917 fps. ADI AR 2217 gives the best case fill at 100 %, and 80 of the 80 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 200.0 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 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, Ramshot Grand, Accurate MAGPRO rank at the top here: for .300 Weath. Mag. with the .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets 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.