Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 171gr | Peregrine VRG-2 bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Alliant Reloder-17.
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.
A valid access license is required to use the Personalized Load Calculator.
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 2495 | <<locked>> | 82% | 53,954 psi | 87% | 2795 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,753 psi | 89% | 2871 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,258 psi | 85% | 2907 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 54,534 psi | 87% | 2851 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,564 psi | 89% | 2963 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 55,854 psi | 90% | 3054 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 86% | 54,984 psi | 88% | 2887 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 53,171 psi | 85% | 2949 fps | 97.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,346 psi | 87% | 2999 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,433 psi | 87% | 3012 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,796 psi | 89% | 2910 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,883 psi | 90% | 2933 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,434 psi | 90% | 3022 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,041 psi | 87% | 2989 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,043 psi | 90% | 2995 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,171 psi | 85% | 2992 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,256 psi | 81% | 2927 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,598 psi | 70% | 2844 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,027 psi | 87% | 3068 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,704 psi | 78% | 2910 fps | 96.9% |
| Bofors RP3 | <<locked>> | 86% | 56,405 psi | 90% | 2927 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,171 psi | 85% | 2992 fps | 98% |
| Bofors RP7 | <<locked>> | 90% | 55,970 psi | 90% | 2913 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 84% | 53,316 psi | 85% | 2890 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 54,157 psi | 87% | 2959 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 54,172 psi | 87% | 2920 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 98% | 54,621 psi | 88% | 2943 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 53,229 psi | 85% | 2890 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,737 psi | 88% | 2927 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,592 psi | 88% | 2999 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,172 psi | 58% | 1818 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,390 psi | 89% | 2890 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,520 psi | 87% | 2871 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,548 psi | 86% | 2851 fps | 98.9% |
| IMR 4350 | <<locked>> | 92% | 53,621 psi | 86% | 2890 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,418 psi | 87% | 2890 fps | 99% |
| IMR 4831 | <<locked>> | 94% | 55,970 psi | 90% | 2953 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 53,809 psi | 86% | 2907 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,202 psi | 90% | 2933 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,692 psi | 83% | 2966 fps | 96.2% |
| Lovex S060 | <<locked>> | 82% | 55,927 psi | 90% | 2854 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,491 psi | 87% | 2861 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,230 psi | 87% | 2884 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 55,448 psi | 89% | 2923 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,005 psi | 71% | 2749 fps | 98.2% |
| Norma 201 | <<locked>> | 82% | 55,811 psi | 89% | 2874 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,187 psi | 88% | 2917 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,186 psi | 87% | 2943 fps | 97.7% |
| Norma MRP | <<locked>> | 98% | 52,721 psi | 85% | 3018 fps | 99% |
| Norma URP | <<locked>> | 92% | 54,273 psi | 87% | 2946 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,275 psi | 90% | 2949 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,996 psi | 83% | 2982 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 92% | 53,127 psi | 85% | 2943 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,340 psi | 74% | 2851 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,811 psi | 59% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,417 psi | 86% | 2874 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,519 psi | 86% | 2982 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,564 psi | 89% | 2986 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,128 psi | 87% | 3015 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,641 psi | 68% | 2864 fps | 97% |
| Rottweil R 902 | <<locked>> | 82% | 53,040 psi | 85% | 2825 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 52,895 psi | 85% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,926 psi | 88% | 2923 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 98% | 55,129 psi | 88% | 2976 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 90% | 55,970 psi | 90% | 2913 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,230 psi | 87% | 2884 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 54,491 psi | 87% | 2861 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,448 psi | 89% | 2923 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,882 psi | 88% | 2933 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,651 psi | 89% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,244 psi | 87% | 2759 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 53,824 psi | 86% | 2835 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,650 psi | 88% | 2972 fps | 98.1% |
| Somchem S335 | <<locked>> | 82% | 56,391 psi | 90% | 2802 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 52,997 psi | 85% | 2864 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 53,606 psi | 86% | 2949 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,782 psi | 89% | 2953 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 53,534 psi | 86% | 2789 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,650 psi | 86% | 2799 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,331 psi | 87% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,011 psi | 85% | 2890 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,547 psi | 83% | 2871 fps | 98% |
| Vihtavuori N540 | <<locked>> | 84% | 55,405 psi | 89% | 2844 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,608 psi | 89% | 2946 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,043 psi | 90% | 3005 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 53,142 psi | 85% | 3005 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 52,489 psi | 84% | 2858 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,389 psi | 87% | 2959 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,339 psi | 73% | 2982 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,985 psi | 90% | 2913 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,115 psi | 90% | 2949 fps | 98.2% |
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 2495 | <<locked>> | 80% | 50,459 psi | 81% | 2746 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,646 psi | 78% | 2753 fps | 97.5% |
| Accurate 3100 | <<locked>> | 88% | 35,056 psi | 56% | 2559 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 47,819 psi | 77% | 2753 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,332 psi | 58% | 2605 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 98% | 51,909 psi | 83% | 2986 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 45,542 psi | 73% | 2726 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 43,555 psi | 70% | 2769 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 98% | 50,821 psi | 81% | 2933 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,633 psi | 81% | 2949 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,934 psi | 74% | 2753 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,153 psi | 79% | 2822 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,665 psi | 57% | 2621 fps | 97.9% |
| Alliant Reloder-17 | 63.4 gr | 80% | 40,625 psi | 65% | 2753 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,163 psi | 69% | 2762 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,439 psi | 70% | 2812 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,904 psi | 42% | 2359 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,591 psi | 54% | 2598 fps | 95.4% |
| Alliant Reloder-26 | 68.2 gr | 84% | 31,894 psi | 51% | 2595 fps | 95.6% |
| Bofors RP15 | <<locked>> | 96% | 42,627 psi | 68% | 2792 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 46,209 psi | 74% | 2762 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,439 psi | 70% | 2812 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 40,669 psi | 65% | 2631 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 46,586 psi | 75% | 2772 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 38,595 psi | 62% | 2657 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 80% | 41,669 psi | 67% | 2684 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 96% | 51,068 psi | 82% | 2884 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,098 psi | 53% | 2510 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,068 psi | 82% | 2871 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 40,524 psi | 65% | 2733 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 43% | 1627 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,938 psi | 83% | 2838 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,906 psi | 77% | 2762 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,285 psi | 81% | 2795 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 38,928 psi | 62% | 2612 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,235 psi | 68% | 2664 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 35,041 psi | 56% | 2559 fps | 97.4% |
| IMR 4895 | <<locked>> | 80% | 50,430 psi | 81% | 2851 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,516 psi | 79% | 2818 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 98% | 48,312 psi | 77% | 2900 fps | 95.3% |
| Lovex S060 | <<locked>> | 80% | 52,736 psi | 85% | 2808 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,124 psi | 77% | 2762 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,566 psi | 63% | 2612 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 37,840 psi | 61% | 2589 fps | 95.6% |
| Lovex S071 | <<locked>> | 92% | 33,779 psi | 54% | 2526 fps | 95% |
| Norma 201 | <<locked>> | 80% | 52,330 psi | 84% | 2822 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,486 psi | 78% | 2808 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,179 psi | 71% | 2759 fps | 95.4% |
| Norma MRP | <<locked>> | 90% | 39,668 psi | 64% | 2759 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 36,477 psi | 58% | 2605 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 80% | 49,052 psi | 79% | 2835 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,443 psi | 78% | 2913 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 35,331 psi | 57% | 2589 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 96% | 39,885 psi | 64% | 2717 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,572 psi | 44% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,644 psi | 75% | 2756 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,265 psi | 69% | 2808 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,260 psi | 58% | 2625 fps | 97.4% |
| ReloadSwiss RS 70 | 64.4 gr | 80% | 35,418 psi | 57% | 2631 fps | 96.7% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,508 psi | 63% | 2785 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 49,705 psi | 80% | 2772 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,468 psi | 70% | 2707 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 48,182 psi | 77% | 2805 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 90% | 42,018 psi | 67% | 2736 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 40,669 psi | 65% | 2631 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,566 psi | 63% | 2612 fps | 97.4% |
| Shooters World Precision | <<locked>> | 80% | 48,124 psi | 77% | 2762 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,840 psi | 61% | 2589 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,802 psi | 72% | 2766 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,286 psi | 84% | 2851 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,904 psi | 72% | 2621 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,624 psi | 62% | 2552 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,626 psi | 67% | 2733 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 52,968 psi | 85% | 2756 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,787 psi | 70% | 2707 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 32,822 psi | 53% | 2559 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 39,958 psi | 64% | 2664 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 50,067 psi | 80% | 2736 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,502 psi | 81% | 2753 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,930 psi | 67% | 2641 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,782 psi | 61% | 2605 fps | 98% |
| Vihtavuori N165 | <<locked>> | 94% | 42,134 psi | 68% | 2700 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 48,617 psi | 78% | 2746 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,202 psi | 60% | 2605 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 28,384 psi | 46% | 2434 fps | 95.2% |
| Vihtavuori N560 | <<locked>> | 96% | 49,501 psi | 79% | 2940 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,028 psi | 59% | 2579 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 38,769 psi | 62% | 2664 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,020 psi | 42% | 2441 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,272 psi | 84% | 2858 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 42,337 psi | 68% | 2710 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 100 powders for .300 Win. Mag. loaded with the .308 | 171gr | Peregrine VRG-2. Alliant Reloder-26 delivers the highest muzzle velocity at 3,068 fps; across all powders the maximum-charge window runs from 1,818 fps to 3,068 fps. Accurate 3100 gives the best case fill at 100 %, and 100 of the 100 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 171.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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. ReloadSwiss RS 70, Alliant Reloder-26, Alliant Reloder-17 rank at the top here: for .300 Win. Mag. with the .308 | 171gr | Peregrine VRG-2 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.