Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 206gr | Peregrine Backup (VRG-2) bullet and 80 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Alliant Reloder-26 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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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>> | 98% | 55,376 psi | 89% | 2687 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 55,999 psi | 90% | 2605 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 53,795 psi | 86% | 2677 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 53,998 psi | 87% | 2779 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 84% | 55,956 psi | 90% | 2644 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,810 psi | 88% | 2730 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 98% | 56,101 psi | 90% | 2785 fps | 98.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 43,584 psi | 70% | 2566 fps | 96.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,450 psi | 62% | 2523 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,577 psi | 86% | 2618 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,839 psi | 88% | 2730 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,188 psi | 90% | 2749 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,317 psi | 87% | 2720 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,477 psi | 89% | 2779 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,275 psi | 90% | 2749 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,617 psi | 78% | 2703 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 52,547 psi | 84% | 2782 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,375 psi | 87% | 2762 fps | 99.3% |
| Bofors RP3 | <<locked>> | 82% | 54,244 psi | 87% | 2631 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,469 psi | 71% | 2631 fps | 97.1% |
| Bofors RP5 | <<locked>> | 98% | 55,477 psi | 89% | 2779 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 53,650 psi | 86% | 2631 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,080 psi | 77% | 2651 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 82% | 54,679 psi | 88% | 2654 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,854 psi | 90% | 2730 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 86% | 55,390 psi | 89% | 2690 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 96% | 56,246 psi | 90% | 2730 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,172 psi | 88% | 2713 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,129 psi | 88% | 2657 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,659 psi | 76% | 2753 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 88% | 56,217 psi | 90% | 2769 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,796 psi | 59% | 1647 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,361 psi | 89% | 2625 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,042 psi | 88% | 2667 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,274 psi | 89% | 2654 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 54,317 psi | 87% | 2671 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,027 psi | 87% | 2661 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 98% | 53,563 psi | 86% | 2759 fps | 98.4% |
| Lovex S062 | <<locked>> | 82% | 55,782 psi | 89% | 2618 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,448 psi | 89% | 2651 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 53,490 psi | 86% | 2644 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,356 psi | 79% | 2605 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 55,738 psi | 89% | 2720 fps | 99.2% |
| Norma MRP | <<locked>> | 96% | 55,230 psi | 89% | 2802 fps | 99.9% |
| Norma URP | <<locked>> | 90% | 56,130 psi | 90% | 2710 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,215 psi | 87% | 2782 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 90% | 54,897 psi | 88% | 2720 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,909 psi | 83% | 2717 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,391 psi | 60% | 1686 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,331 psi | 87% | 2641 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,724 psi | 89% | 2736 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,766 psi | 86% | 2700 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,970 psi | 90% | 2782 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,587 psi | 76% | 2746 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 84% | 54,592 psi | 88% | 2631 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,260 psi | 90% | 2700 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 94% | 53,635 psi | 86% | 2707 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 86% | 53,650 psi | 86% | 2631 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,448 psi | 89% | 2651 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 55,782 psi | 89% | 2618 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 53,490 psi | 86% | 2644 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,275 psi | 90% | 2690 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,085 psi | 88% | 2513 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,897 psi | 88% | 2608 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,214 psi | 85% | 2703 fps | 99.2% |
| Somchem S355 | <<locked>> | 84% | 54,418 psi | 87% | 2625 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,128 psi | 87% | 2641 fps | 97.7% |
| Somchem S365 | <<locked>> | 92% | 56,057 psi | 90% | 2713 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,012 psi | 87% | 2680 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 86% | 55,724 psi | 89% | 2602 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,592 psi | 88% | 2657 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 53,345 psi | 86% | 2661 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 88% | 53,505 psi | 86% | 2661 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,100 psi | 88% | 2726 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,347 psi | 89% | 2799 fps | 98.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,676 psi | 81% | 2710 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,056 psi | 87% | 2625 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,115 psi | 90% | 2733 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,721 psi | 85% | 2825 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,128 psi | 87% | 2677 fps | 99.1% |
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% | 29,747 psi | 48% | 2218 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 52,562 psi | 84% | 2562 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,640 psi | 65% | 2464 fps | 99.7% |
| Accurate MAGPRO | 68.6 gr | 90% | 43,714 psi | 70% | 2602 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 49,617 psi | 80% | 2549 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 36,869 psi | 59% | 2402 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 90% | 42,757 psi | 69% | 2552 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 98% | 40,799 psi | 65% | 2510 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 96% | 33,765 psi | 54% | 2408 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,270 psi | 81% | 2569 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,450 psi | 63% | 2474 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,165 psi | 72% | 2589 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 36,695 psi | 59% | 2398 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 86% | 36,883 psi | 59% | 2444 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,935 psi | 46% | 2254 fps | 98.7% |
| Alliant Reloder-25 | <<locked>> | 84% | 28,834 psi | 46% | 2267 fps | 95.6% |
| Alliant Reloder-26 | 61.6 gr | 80% | 31,009 psi | 50% | 2365 fps | 97.6% |
| Bofors RP15 | <<locked>> | 88% | 36,579 psi | 59% | 2438 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 50,850 psi | 82% | 2582 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 38,740 psi | 62% | 2516 fps | 95.4% |
| Bofors RP5 | <<locked>> | 86% | 36,883 psi | 59% | 2444 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 44,396 psi | 71% | 2477 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 94% | 39,044 psi | 63% | 2477 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 51,053 psi | 82% | 2602 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,670 psi | 68% | 2513 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 80% | 45,687 psi | 73% | 2533 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 88% | 42,844 psi | 69% | 2507 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 44,889 psi | 72% | 2546 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,101 psi | 59% | 2372 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 36,521 psi | 59% | 2510 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 41,785 psi | 67% | 2533 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,383 psi | 44% | 1470 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,228 psi | 84% | 2579 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,929 psi | 64% | 2411 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,948 psi | 74% | 2503 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 39,073 psi | 63% | 2421 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 41,959 psi | 67% | 2454 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 90% | 40,959 psi | 66% | 2530 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 52,388 psi | 84% | 2572 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,265 psi | 69% | 2457 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 41,452 psi | 66% | 2441 fps | 98.4% |
| Lovex S071 | <<locked>> | 84% | 29,182 psi | 47% | 2205 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 39,566 psi | 63% | 2441 fps | 96.1% |
| Norma MRP | 61.3 gr | 82% | 33,533 psi | 54% | 2395 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 40,364 psi | 65% | 2461 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 40,625 psi | 65% | 2536 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 39,233 psi | 63% | 2454 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 90% | 35,882 psi | 58% | 2421 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,978 psi | 45% | 1506 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,821 psi | 81% | 2585 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,979 psi | 77% | 2631 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,654 psi | 65% | 2487 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,218 psi | 63% | 2500 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 33,257 psi | 53% | 2425 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 47,761 psi | 77% | 2533 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 40,886 psi | 66% | 2441 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 82% | 35,694 psi | 57% | 2379 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 44,396 psi | 71% | 2477 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,265 psi | 69% | 2457 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 52,388 psi | 84% | 2572 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,452 psi | 66% | 2441 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,197 psi | 79% | 2589 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,689 psi | 78% | 2431 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,351 psi | 68% | 2405 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 35,360 psi | 57% | 2372 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 47,950 psi | 77% | 2530 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 44,454 psi | 71% | 2484 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 36,985 psi | 59% | 2418 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 33,968 psi | 54% | 2313 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 45,803 psi | 73% | 2464 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,771 psi | 67% | 2457 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 86% | 35,752 psi | 57% | 2349 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 41,176 psi | 66% | 2461 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 32,198 psi | 52% | 2323 fps | 98.6% |
| Vihtavuori N560 | <<locked>> | 88% | 41,887 psi | 67% | 2562 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 94% | 41,191 psi | 66% | 2543 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,828 psi | 65% | 2425 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,888 psi | 69% | 2516 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,411 psi | 41% | 2241 fps | 98.3% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,000 psi | 61% | 2402 fps | 95.8% |
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 80 powders for .300 Win. Mag. loaded with the .308 | 206gr | Peregrine Backup (VRG-2). Winchester StaBALL HD delivers the highest muzzle velocity at 2,825 fps; across all powders the maximum-charge window runs from 1,647 fps to 2,825 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 (430 MPa), the top charges use 59–90 %, 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-23 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. Accurate MAGPRO, Alliant Reloder-26, Norma MRP rank at the top here: for .300 Win. 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.