Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 200gr | Lapua Subsonic bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Vihtavuori N560 and Norma MRP.
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>> | 94% | 54,926 psi | 86% | 2753 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,333 psi | 88% | 2779 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 57,174 psi | 90% | 2900 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 82% | 57,290 psi | 90% | 2736 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,000 psi | 89% | 2838 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 54,679 psi | 86% | 2841 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,994 psi | 77% | 2743 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,656 psi | 68% | 2703 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,203 psi | 90% | 2831 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,290 psi | 90% | 2835 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,491 psi | 85% | 2792 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,507 psi | 89% | 2825 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,650 psi | 86% | 2838 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,854 psi | 88% | 2808 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,013 psi | 86% | 2867 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,304 psi | 88% | 2897 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,347 psi | 88% | 2802 fps | 96.5% |
| Bofors RP15 | <<locked>> | 98% | 57,276 psi | 90% | 2874 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,169 psi | 80% | 2812 fps | 98.8% |
| Bofors RP5 | <<locked>> | 94% | 54,650 psi | 86% | 2838 fps | 99.5% |
| Bofors RP7 | <<locked>> | 84% | 55,201 psi | 87% | 2730 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,085 psi | 85% | 2828 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 84% | 54,186 psi | 85% | 2776 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 56,898 psi | 89% | 2789 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 54,723 psi | 86% | 2782 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,290 psi | 90% | 2822 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,290 psi | 90% | 2753 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,969 psi | 85% | 2936 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,505 psi | 85% | 2815 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,101 psi | 58% | 1722 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,623 psi | 89% | 2766 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,521 psi | 89% | 2749 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 56,492 psi | 89% | 2769 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,782 psi | 87% | 2766 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 96% | 56,246 psi | 88% | 2874 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 57,130 psi | 90% | 2746 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,201 psi | 87% | 2743 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,825 psi | 87% | 2762 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,711 psi | 90% | 2822 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 39,349 psi | 62% | 2635 fps | 98% |
| Norma MRP | <<locked>> | 92% | 54,549 psi | 85% | 2858 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,592 psi | 86% | 2759 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,956 psi | 89% | 2897 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 88% | 57,159 psi | 90% | 2822 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,187 psi | 86% | 2831 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,898 psi | 59% | 1762 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,304 psi | 88% | 2802 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,534 psi | 85% | 2828 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,723 psi | 86% | 2936 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,356 psi | 77% | 2818 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 82% | 56,507 psi | 89% | 2726 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,679 psi | 86% | 2753 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 92% | 55,956 psi | 88% | 2812 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 55,201 psi | 87% | 2730 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,130 psi | 90% | 2746 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,201 psi | 87% | 2743 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,130 psi | 88% | 2598 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,318 psi | 88% | 2703 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,521 psi | 87% | 2812 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 56,159 psi | 88% | 2720 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 56,159 psi | 88% | 2746 fps | 98.4% |
| Somchem S365 | <<locked>> | 88% | 55,042 psi | 86% | 2762 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,521 psi | 89% | 2789 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 57,348 psi | 90% | 2694 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,521 psi | 89% | 2756 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,043 psi | 88% | 2769 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 55,680 psi | 87% | 2762 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,505 psi | 85% | 2782 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,360 psi | 85% | 2851 fps | 98.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,740 psi | 90% | 2887 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,734 psi | 80% | 2825 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,825 psi | 87% | 2713 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,389 psi | 85% | 2779 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 57,464 psi | 90% | 2940 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,391 psi | 88% | 2785 fps | 99.6% |
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% | 34,316 psi | 54% | 2379 fps | 97.6% |
| Accurate 4350 | <<locked>> | 80% | 45,977 psi | 72% | 2621 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 43,163 psi | 68% | 2654 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 53,780 psi | 84% | 2687 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,406 psi | 60% | 2500 fps | 96.2% |
| ADI AR 2213 | <<locked>> | 86% | 41,727 psi | 65% | 2602 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 94% | 40,205 psi | 63% | 2566 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 90% | 31,720 psi | 50% | 2411 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,696 psi | 61% | 2500 fps | 96.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,947 psi | 69% | 2625 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,763 psi | 80% | 2736 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,348 psi | 60% | 2493 fps | 96.2% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,550 psi | 57% | 2497 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,924 psi | 52% | 2405 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,761 psi | 45% | 2316 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,955 psi | 56% | 2539 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 49,951 psi | 78% | 2694 fps | 95% |
| Bofors RP15 | <<locked>> | 84% | 36,405 psi | 57% | 2490 fps | 95.5% |
| Bofors RP30 | <<locked>> | 92% | 38,986 psi | 61% | 2582 fps | 95.8% |
| Bofors RP5 | <<locked>> | 82% | 36,550 psi | 57% | 2497 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 48,573 psi | 76% | 2621 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 38,479 psi | 60% | 2530 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 47,630 psi | 75% | 2671 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 50,140 psi | 79% | 2684 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 41,785 psi | 65% | 2552 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 43,758 psi | 69% | 2592 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,553 psi | 65% | 2513 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 34,113 psi | 53% | 2507 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 46,949 psi | 74% | 2690 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 44% | 1539 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,150 psi | 69% | 2559 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,893 psi | 78% | 2644 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 43,772 psi | 69% | 2569 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,727 psi | 64% | 2497 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 86% | 40,219 psi | 63% | 2582 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 47,558 psi | 75% | 2598 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 45,876 psi | 72% | 2589 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 29,559 psi | 46% | 2260 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 44,077 psi | 69% | 2595 fps | 97.6% |
| Norma 217 | <<locked>> | 94% | 32,198 psi | 50% | 2454 fps | 95.1% |
| Norma MRP | 66.7 gr | 80% | 35,737 psi | 56% | 2503 fps | 96.9% |
| Norma URP | <<locked>> | 80% | 45,063 psi | 71% | 2608 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 39,885 psi | 63% | 2589 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 43,918 psi | 69% | 2605 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 33,054 psi | 52% | 2411 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,384 psi | 44% | 1575 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,963 psi | 72% | 2641 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,063 psi | 69% | 2657 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 33,112 psi | 52% | 2484 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 42,627 psi | 67% | 2690 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 52,939 psi | 83% | 2677 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,726 psi | 62% | 2480 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 37,681 psi | 59% | 2480 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 80% | 48,573 psi | 76% | 2621 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,558 psi | 75% | 2598 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 45,876 psi | 72% | 2589 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,852 psi | 83% | 2556 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,470 psi | 73% | 2549 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,347 psi | 59% | 2477 fps | 96.1% |
| Somchem S355 | <<locked>> | 80% | 52,678 psi | 83% | 2671 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 43,149 psi | 68% | 2526 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 42,163 psi | 66% | 2569 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,261 psi | 60% | 2467 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 80% | 50,473 psi | 79% | 2598 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,485 psi | 73% | 2602 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,127 psi | 52% | 2346 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 45,876 psi | 72% | 2608 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,057 psi | 58% | 2480 fps | 99.7% |
| Vihtavuori N560 | 70 gr | 84% | 41,220 psi | 65% | 2612 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 90% | 41,205 psi | 65% | 2598 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 96% | 44,005 psi | 69% | 2703 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,571 psi | 71% | 2566 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,630 psi | 75% | 2671 fps | 99.5% |
| Winchester StaBALL HD | 66 gr | 80% | 29,283 psi | 46% | 2421 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,940 psi | 55% | 2395 fps | 95% |
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 75 powders for .300 Weath. Mag. loaded with the .308 | 200gr | Lapua Subsonic. Winchester StaBALL HD delivers the highest muzzle velocity at 2,940 fps; across all powders the maximum-charge window runs from 1,722 fps to 2,940 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 1:11.5 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. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for .300 Weath. Mag. with the .308 | 200gr | Lapua Subsonic 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.