Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 200gr | Barnes X S bullet and 73 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 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 57,377 psi | 90% | 2759 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,056 psi | 86% | 2733 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 55,042 psi | 86% | 2841 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 90% | 54,708 psi | 86% | 2779 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 94% | 56,072 psi | 88% | 2838 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,560 psi | 79% | 2743 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,556 psi | 71% | 2717 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 55,143 psi | 86% | 2779 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 55,071 psi | 86% | 2779 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,086 psi | 88% | 2792 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,505 psi | 85% | 2772 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,391 psi | 88% | 2838 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 57,479 psi | 90% | 2808 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,594 psi | 89% | 2867 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,172 psi | 85% | 2848 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 57,551 psi | 90% | 2795 fps | 96.5% |
| Bofors RP15 | <<locked>> | 96% | 55,347 psi | 87% | 2822 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,910 psi | 83% | 2818 fps | 98.9% |
| Bofors RP5 | <<locked>> | 94% | 56,391 psi | 88% | 2838 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 56,710 psi | 89% | 2723 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,477 psi | 87% | 2825 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 84% | 55,840 psi | 88% | 2776 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 54,926 psi | 86% | 2733 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 56,130 psi | 88% | 2779 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 54,984 psi | 86% | 2762 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,550 psi | 87% | 2707 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,666 psi | 87% | 2940 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 55,970 psi | 88% | 2815 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,463 psi | 59% | 1709 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,607 psi | 86% | 2710 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,389 psi | 85% | 2694 fps | 99.8% |
| IMR 4831 | <<locked>> | 86% | 55,143 psi | 86% | 2726 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,130 psi | 90% | 2762 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 96% | 57,740 psi | 90% | 2874 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,495 psi | 65% | 2631 fps | 96.2% |
| Lovex S065 | <<locked>> | 84% | 55,593 psi | 87% | 2700 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,305 psi | 90% | 2746 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,143 psi | 86% | 2730 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,521 psi | 87% | 2766 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 41,626 psi | 65% | 2661 fps | 98.4% |
| Norma MRP | <<locked>> | 92% | 56,144 psi | 88% | 2861 fps | 100% |
| Norma URP | <<locked>> | 86% | 56,507 psi | 89% | 2762 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 54,578 psi | 86% | 2835 fps | 99% |
| Ramshot Hunter | <<locked>> | 86% | 55,187 psi | 86% | 2769 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 56,913 psi | 89% | 2835 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,363 psi | 60% | 1752 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,679 psi | 86% | 2756 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,869 psi | 88% | 2828 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 56,159 psi | 88% | 2936 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,387 psi | 81% | 2831 fps | 97.4% |
| Rottweil R 904 | <<locked>> | 90% | 56,086 psi | 88% | 2749 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 92% | 57,653 psi | 90% | 2815 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 56,710 psi | 89% | 2723 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,593 psi | 87% | 2700 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,305 psi | 90% | 2746 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,580 psi | 90% | 2592 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,781 psi | 86% | 2654 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,203 psi | 90% | 2812 fps | 99.6% |
| Somchem S361 | <<locked>> | 90% | 57,580 psi | 90% | 2743 fps | 98.4% |
| Somchem S365 | <<locked>> | 88% | 57,058 psi | 89% | 2769 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,085 psi | 86% | 2743 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 82% | 55,593 psi | 87% | 2644 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,592 psi | 86% | 2703 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,479 psi | 90% | 2766 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 57,319 psi | 90% | 2759 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,797 psi | 89% | 2792 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,796 psi | 87% | 2851 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 98% | 56,246 psi | 88% | 2844 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,431 psi | 82% | 2831 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,348 psi | 90% | 2713 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,086 psi | 88% | 2782 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,143 psi | 86% | 2894 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,418 psi | 85% | 2733 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% | 37,289 psi | 58% | 2415 fps | 98.2% |
| Accurate 4350 | <<locked>> | 80% | 48,704 psi | 76% | 2638 fps | 100% |
| Accurate MAGPRO | 70.8 gr | 86% | 45,223 psi | 71% | 2671 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 40,074 psi | 63% | 2510 fps | 96.5% |
| ADI AR 2213 | <<locked>> | 84% | 40,959 psi | 64% | 2559 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 92% | 39,537 psi | 62% | 2523 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 88% | 31,908 psi | 50% | 2388 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,596 psi | 64% | 2516 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,614 psi | 71% | 2631 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,504 psi | 82% | 2740 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,277 psi | 63% | 2510 fps | 96.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,260 psi | 57% | 2461 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,114 psi | 55% | 2431 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,879 psi | 48% | 2352 fps | 96.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,319 psi | 60% | 2569 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 51,126 psi | 80% | 2687 fps | 95% |
| Bofors RP15 | <<locked>> | 82% | 36,114 psi | 57% | 2457 fps | 95.2% |
| Bofors RP30 | <<locked>> | 90% | 38,682 psi | 61% | 2549 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 36,260 psi | 57% | 2461 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 50,502 psi | 79% | 2628 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 37,884 psi | 59% | 2490 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 49,429 psi | 77% | 2674 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 51,605 psi | 81% | 2680 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 43,497 psi | 68% | 2559 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,815 psi | 67% | 2546 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,482 psi | 68% | 2523 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 36,187 psi | 57% | 2536 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 48,805 psi | 76% | 2700 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,224 psi | 44% | 1529 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,716 psi | 72% | 2562 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,358 psi | 80% | 2644 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 45,876 psi | 72% | 2579 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 42,540 psi | 67% | 2507 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 86% | 42,032 psi | 66% | 2595 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 38,914 psi | 61% | 2572 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 49,559 psi | 78% | 2605 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 48,022 psi | 75% | 2598 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 32,561 psi | 51% | 2306 fps | 96.8% |
| Norma 204 | <<locked>> | 80% | 45,832 psi | 72% | 2602 fps | 97.8% |
| Norma 217 | <<locked>> | 92% | 32,779 psi | 51% | 2444 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 37,782 psi | 59% | 2526 fps | 97.5% |
| Norma URP | <<locked>> | 80% | 47,065 psi | 74% | 2618 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 39,175 psi | 61% | 2546 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 45,788 psi | 72% | 2615 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 35,375 psi | 55% | 2441 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,921 psi | 45% | 1565 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,964 psi | 75% | 2651 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,759 psi | 72% | 2667 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 33,170 psi | 52% | 2457 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 44,657 psi | 70% | 2707 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 41,524 psi | 65% | 2493 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 39,769 psi | 62% | 2500 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 80% | 50,502 psi | 79% | 2628 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,559 psi | 78% | 2605 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 48,022 psi | 75% | 2598 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,447 psi | 85% | 2552 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,530 psi | 76% | 2556 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,421 psi | 62% | 2497 fps | 96.6% |
| Somchem S361 | <<locked>> | 80% | 42,235 psi | 66% | 2480 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 44,208 psi | 69% | 2579 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,480 psi | 63% | 2487 fps | 97.7% |
| Vihtavuori N150 | <<locked>> | 80% | 52,388 psi | 82% | 2602 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,457 psi | 76% | 2612 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,302 psi | 55% | 2369 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 47,863 psi | 75% | 2615 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,523 psi | 62% | 2503 fps | 99.9% |
| Vihtavuori N560 | 67.9 gr | 84% | 43,221 psi | 68% | 2628 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 88% | 41,017 psi | 64% | 2569 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 96% | 46,093 psi | 72% | 2720 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,195 psi | 74% | 2569 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,429 psi | 77% | 2674 fps | 99.6% |
| Winchester StaBALL HD | 64 gr | 80% | 31,676 psi | 50% | 2467 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,970 psi | 58% | 2415 fps | 95.6% |
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 73 powders for .300 Weath. Mag. loaded with the .308 | 200gr | Barnes X S. Hodgdon Retumbo delivers the highest muzzle velocity at 2,940 fps; across all powders the maximum-charge window runs from 1,709 fps to 2,940 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 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 200.0 gr projectile in 0.308" calls for a 1:11.0 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. Winchester StaBALL HD, Vihtavuori N560, Accurate MAGPRO rank at the top here: for .300 Weath. Mag. with the .308 | 200gr | Barnes X S 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.