Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 206gr | Peregrine Backup (VRG-2) 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% | 54,592 psi | 86% | 2713 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 56,028 psi | 88% | 2740 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 57,261 psi | 90% | 2864 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 82% | 57,232 psi | 90% | 2700 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,130 psi | 90% | 2802 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 94% | 54,795 psi | 86% | 2808 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,965 psi | 77% | 2710 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,511 psi | 68% | 2671 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 57,290 psi | 90% | 2799 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,377 psi | 90% | 2795 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,462 psi | 85% | 2756 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,550 psi | 89% | 2792 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,708 psi | 86% | 2802 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,898 psi | 88% | 2772 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,143 psi | 86% | 2831 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,362 psi | 88% | 2861 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,463 psi | 88% | 2769 fps | 96.9% |
| Bofors RP15 | <<locked>> | 98% | 57,348 psi | 90% | 2838 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,923 psi | 80% | 2772 fps | 98.9% |
| Bofors RP5 | <<locked>> | 94% | 54,708 psi | 86% | 2802 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 55,013 psi | 86% | 2694 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,998 psi | 85% | 2792 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 84% | 54,114 psi | 85% | 2740 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 56,884 psi | 89% | 2753 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 54,563 psi | 86% | 2746 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,392 psi | 90% | 2789 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,305 psi | 90% | 2717 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,114 psi | 85% | 2904 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,592 psi | 86% | 2779 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,985 psi | 58% | 1696 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,608 psi | 89% | 2730 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,478 psi | 89% | 2713 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 56,347 psi | 88% | 2733 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,796 psi | 87% | 2733 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 96% | 56,391 psi | 88% | 2844 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 56,956 psi | 89% | 2710 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,998 psi | 86% | 2707 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,521 psi | 87% | 2723 fps | 100% |
| Norma 204 | <<locked>> | 86% | 53,867 psi | 84% | 2733 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 38,885 psi | 61% | 2592 fps | 98.1% |
| Norma MRP | <<locked>> | 92% | 54,549 psi | 85% | 2822 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,491 psi | 85% | 2723 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,159 psi | 90% | 2864 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 88% | 57,188 psi | 90% | 2785 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,390 psi | 87% | 2799 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,942 psi | 59% | 1739 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,217 psi | 88% | 2766 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,665 psi | 86% | 2795 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,694 psi | 86% | 2900 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,385 psi | 77% | 2785 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 82% | 56,144 psi | 88% | 2687 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,694 psi | 86% | 2720 fps | 99% |
| Rottweil R 905 | <<locked>> | 92% | 55,941 psi | 88% | 2779 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 55,013 psi | 86% | 2694 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,956 psi | 89% | 2710 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,998 psi | 86% | 2707 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,231 psi | 88% | 2562 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,115 psi | 88% | 2667 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,506 psi | 87% | 2776 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 55,883 psi | 88% | 2680 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,883 psi | 88% | 2710 fps | 98.6% |
| Somchem S365 | <<locked>> | 88% | 54,984 psi | 86% | 2726 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,449 psi | 88% | 2753 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 57,188 psi | 90% | 2654 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,449 psi | 88% | 2717 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 56,043 psi | 88% | 2736 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 55,521 psi | 87% | 2723 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,317 psi | 85% | 2743 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,433 psi | 85% | 2818 fps | 98.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,740 psi | 90% | 2854 fps | 99.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,589 psi | 79% | 2789 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,883 psi | 88% | 2677 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,346 psi | 85% | 2743 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 53,388 psi | 84% | 2848 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,449 psi | 88% | 2749 fps | 99.7% |
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% | 33,678 psi | 53% | 2336 fps | 97.6% |
| Accurate 4350 | <<locked>> | 80% | 45,498 psi | 71% | 2579 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 42,975 psi | 67% | 2618 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 53,679 psi | 84% | 2648 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,145 psi | 60% | 2467 fps | 96.4% |
| ADI AR 2213 | <<locked>> | 84% | 38,827 psi | 61% | 2510 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 94% | 39,842 psi | 62% | 2533 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 90% | 31,299 psi | 49% | 2375 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,435 psi | 60% | 2467 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,816 psi | 69% | 2589 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,676 psi | 79% | 2700 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,072 psi | 60% | 2461 fps | 96.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 33,808 psi | 53% | 2398 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,503 psi | 51% | 2365 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,282 psi | 44% | 2277 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,563 psi | 56% | 2500 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 49,966 psi | 78% | 2661 fps | 95.3% |
| Bofors RP15 | <<locked>> | 84% | 36,085 psi | 57% | 2451 fps | 95.7% |
| Bofors RP30 | <<locked>> | 90% | 36,100 psi | 57% | 2484 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 33,808 psi | 53% | 2398 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 48,312 psi | 76% | 2585 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 90% | 38,218 psi | 60% | 2500 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 47,442 psi | 74% | 2631 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 50,024 psi | 78% | 2648 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 41,626 psi | 65% | 2520 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 84% | 40,727 psi | 64% | 2500 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,234 psi | 65% | 2477 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 33,721 psi | 53% | 2470 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 46,891 psi | 73% | 2657 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 44% | 1516 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,947 psi | 69% | 2526 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,748 psi | 78% | 2608 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 43,395 psi | 68% | 2530 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,480 psi | 63% | 2461 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 86% | 39,987 psi | 63% | 2546 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 47,210 psi | 74% | 2559 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 45,527 psi | 71% | 2552 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 28,848 psi | 45% | 2218 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 43,888 psi | 69% | 2562 fps | 97.9% |
| Norma 217 | <<locked>> | 94% | 31,749 psi | 50% | 2415 fps | 95.3% |
| Norma MRP | 66.5 gr | 80% | 35,389 psi | 55% | 2464 fps | 97.1% |
| Norma URP | <<locked>> | 80% | 44,788 psi | 70% | 2569 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 36,811 psi | 58% | 2490 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 43,685 psi | 68% | 2569 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 32,677 psi | 51% | 2372 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,355 psi | 44% | 1552 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,629 psi | 72% | 2605 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,918 psi | 69% | 2621 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 32,706 psi | 51% | 2444 fps | 96.3% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 42,264 psi | 66% | 2651 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 52,562 psi | 82% | 2638 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,436 psi | 62% | 2448 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 37,304 psi | 58% | 2444 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 80% | 48,312 psi | 76% | 2585 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,210 psi | 74% | 2559 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 45,527 psi | 71% | 2552 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,663 psi | 83% | 2520 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,093 psi | 72% | 2510 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,999 psi | 58% | 2438 fps | 96.3% |
| Somchem S355 | <<locked>> | 80% | 52,373 psi | 82% | 2631 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 40,074 psi | 63% | 2438 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 41,858 psi | 66% | 2530 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,840 psi | 59% | 2428 fps | 97.4% |
| Vihtavuori N150 | <<locked>> | 80% | 50,169 psi | 79% | 2559 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,238 psi | 72% | 2566 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 32,721 psi | 51% | 2310 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 45,571 psi | 71% | 2569 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,521 psi | 57% | 2438 fps | 99.7% |
| Vihtavuori N560 | 69.8 gr | 84% | 41,031 psi | 64% | 2575 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 90% | 40,915 psi | 64% | 2562 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 96% | 43,874 psi | 69% | 2667 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,455 psi | 71% | 2530 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,442 psi | 74% | 2631 fps | 99.6% |
| Winchester StaBALL HD | 65.8 gr | 80% | 28,761 psi | 45% | 2382 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,563 psi | 54% | 2356 fps | 95.2% |
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 | 206gr | Peregrine Backup (VRG-2). Hodgdon Retumbo delivers the highest muzzle velocity at 2,904 fps; across all powders the maximum-charge window runs from 1,696 fps to 2,904 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 206.0 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 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 | 206gr | Peregrine Backup (VRG-2) 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.