Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 171gr | Peregrine VRG-2 bullet and 83 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate MAGPRO 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 2700 | <<locked>> | 82% | 56,652 psi | 89% | 2927 fps | 99.2% |
| Accurate 3100 | <<locked>> | 98% | 56,043 psi | 88% | 2979 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 56,159 psi | 88% | 2904 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,085 psi | 85% | 2969 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,839 psi | 86% | 3068 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 56,260 psi | 88% | 2943 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,129 psi | 86% | 3022 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 98% | 56,681 psi | 89% | 3081 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,769 psi | 61% | 2772 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,246 psi | 90% | 2966 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,435 psi | 90% | 2989 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,201 psi | 87% | 3031 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,420 psi | 88% | 3048 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,723 psi | 86% | 3009 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,101 psi | 88% | 3071 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,029 psi | 89% | 3048 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,095 psi | 77% | 2982 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,476 psi | 84% | 3081 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 3051 fps | 98.6% |
| Bofors RP3 | <<locked>> | 82% | 54,447 psi | 85% | 2927 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 56,101 psi | 88% | 3071 fps | 98.9% |
| Bofors RP7 | <<locked>> | 88% | 57,319 psi | 90% | 2976 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,588 psi | 76% | 2927 fps | 97% |
| Hodgdon H380 | <<locked>> | 82% | 54,621 psi | 86% | 2946 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,246 psi | 88% | 3025 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 55,666 psi | 87% | 2982 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 96% | 56,666 psi | 89% | 3018 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,521 psi | 87% | 2999 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,434 psi | 87% | 2953 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,051 psi | 75% | 3028 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 88% | 56,724 psi | 89% | 3064 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 57% | 1867 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,448 psi | 87% | 2920 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,187 psi | 86% | 2956 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,405 psi | 87% | 2946 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 54,476 psi | 85% | 2963 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,288 psi | 85% | 2943 fps | 97% |
| IMR 7828 SSC | <<locked>> | 98% | 54,259 psi | 85% | 3051 fps | 97.5% |
| Lovex S062 | <<locked>> | 82% | 55,782 psi | 87% | 2913 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,738 psi | 87% | 2943 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 57,159 psi | 90% | 2986 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,690 psi | 78% | 2877 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 56,724 psi | 89% | 2972 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,202 psi | 88% | 3012 fps | 98.6% |
| Norma MRP | <<locked>> | 96% | 55,825 psi | 87% | 3094 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 56,405 psi | 88% | 3009 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,853 psi | 86% | 3071 fps | 98% |
| Ramshot Hunter | <<locked>> | 90% | 55,376 psi | 87% | 3012 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,808 psi | 83% | 2999 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,376 psi | 59% | 1913 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,549 psi | 85% | 2930 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,999 psi | 88% | 3038 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,186 psi | 85% | 2992 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,434 psi | 88% | 3081 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,356 psi | 76% | 3025 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 82% | 57,566 psi | 90% | 2923 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,737 psi | 86% | 2927 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,768 psi | 89% | 2992 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 96% | 57,624 psi | 90% | 3051 fps | 99% |
| Rottweil R 907 | <<locked>> | 88% | 57,319 psi | 90% | 2976 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,738 psi | 87% | 2943 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 55,782 psi | 87% | 2913 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,159 psi | 90% | 2986 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,405 psi | 88% | 2986 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,230 psi | 87% | 2808 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,129 psi | 86% | 2894 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,159 psi | 90% | 3048 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 54,534 psi | 85% | 2920 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,665 psi | 86% | 2923 fps | 96.8% |
| Somchem S365 | <<locked>> | 92% | 56,434 psi | 88% | 3012 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,433 psi | 85% | 2966 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 86% | 55,840 psi | 88% | 2894 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,853 psi | 86% | 2949 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 53,969 psi | 85% | 2946 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 56,478 psi | 89% | 2890 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,609 psi | 90% | 3009 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,579 psi | 87% | 3022 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,898 psi | 88% | 3087 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,300 psi | 80% | 2989 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,549 psi | 85% | 2913 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,521 psi | 89% | 3031 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,679 psi | 84% | 3127 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,694 psi | 86% | 2963 fps | 98.5% |
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 2700 | <<locked>> | 80% | 53,069 psi | 83% | 2871 fps | 98.8% |
| Accurate 3100 | <<locked>> | 84% | 34,360 psi | 54% | 2562 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 52,533 psi | 82% | 2851 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,799 psi | 64% | 2730 fps | 99.1% |
| Accurate MAGPRO | 83.4 gr | 94% | 50,937 psi | 80% | 2999 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 49,516 psi | 78% | 2835 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,177 psi | 66% | 2772 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 92% | 46,021 psi | 72% | 2881 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 36,419 psi | 57% | 2710 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,343 psi | 79% | 2858 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,751 psi | 84% | 2933 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,436 psi | 62% | 2736 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,324 psi | 71% | 2867 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,003 psi | 66% | 2766 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 88% | 39,827 psi | 62% | 2759 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,892 psi | 45% | 2477 fps | 97.3% |
| Alliant Reloder-25 | <<locked>> | 88% | 33,025 psi | 52% | 2612 fps | 96% |
| Alliant Reloder-26 | 71.8 gr | 80% | 31,212 psi | 49% | 2595 fps | 95.9% |
| Bofors RP15 | <<locked>> | 92% | 42,090 psi | 66% | 2808 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 50,850 psi | 80% | 2871 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 39,827 psi | 62% | 2759 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 44,280 psi | 69% | 2743 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 96% | 42,192 psi | 66% | 2792 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 51,068 psi | 80% | 2884 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 42,786 psi | 67% | 2779 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 45,658 psi | 72% | 2805 fps | 97% |
| Hodgdon H4831 | <<locked>> | 92% | 49,327 psi | 77% | 2890 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,356 psi | 76% | 2874 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,043 psi | 58% | 2625 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,320 psi | 62% | 2822 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 41,901 psi | 66% | 2792 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,340 psi | 43% | 1670 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,069 psi | 82% | 2867 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,987 psi | 63% | 2667 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,934 psi | 72% | 2776 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 39,001 psi | 61% | 2677 fps | 98.8% |
| IMR 4955 Enduron | <<locked>> | 90% | 47,834 psi | 75% | 2828 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 94% | 47,195 psi | 74% | 2920 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 52,417 psi | 82% | 2864 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,221 psi | 68% | 2720 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 41,582 psi | 65% | 2703 fps | 97.4% |
| Lovex S071 | <<locked>> | 88% | 33,504 psi | 53% | 2543 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 53,113 psi | 83% | 2917 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,598 psi | 67% | 2759 fps | 95.6% |
| Norma MRP | 73.2 gr | 84% | 36,274 psi | 57% | 2703 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 40,524 psi | 64% | 2723 fps | 99% |
| Ramshot Grand | <<locked>> | 92% | 43,932 psi | 69% | 2864 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 39,392 psi | 62% | 2710 fps | 97.4% |
| Ramshot Magnum | <<locked>> | 92% | 39,073 psi | 61% | 2733 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,818 psi | 44% | 1709 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,140 psi | 80% | 2871 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,153 psi | 75% | 2920 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,799 psi | 64% | 2749 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,276 psi | 62% | 2756 fps | 98.5% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,042 psi | 56% | 2730 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 54,099 psi | 85% | 2874 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,921 psi | 75% | 2818 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,586 psi | 73% | 2815 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 86% | 41,017 psi | 64% | 2746 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 44,280 psi | 69% | 2743 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,221 psi | 68% | 2720 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 52,417 psi | 82% | 2864 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,582 psi | 65% | 2703 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,400 psi | 77% | 2874 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,849 psi | 77% | 2713 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,293 psi | 66% | 2664 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,654 psi | 64% | 2740 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 47,906 psi | 75% | 2812 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 47,863 psi | 75% | 2805 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 37,043 psi | 58% | 2674 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 38,972 psi | 61% | 2671 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 45,977 psi | 72% | 2740 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,930 psi | 66% | 2720 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 38,551 psi | 60% | 2654 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 52,939 psi | 83% | 2841 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,220 psi | 65% | 2720 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 32,300 psi | 51% | 2559 fps | 97.4% |
| Vihtavuori N560 | <<locked>> | 92% | 48,472 psi | 76% | 2953 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 98% | 47,863 psi | 75% | 2923 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,075 psi | 64% | 2690 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,975 psi | 67% | 2782 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,512 psi | 40% | 2451 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,046 psi | 64% | 2713 fps | 95.3% |
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 89 powders for .300 Weath. Mag. loaded with the .308 | 171gr | Peregrine VRG-2. Winchester StaBALL HD delivers the highest muzzle velocity at 3,127 fps; across all powders the maximum-charge window runs from 1,867 fps to 3,127 fps. ADI AR 2217 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, 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. 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. Alliant Reloder-26, Accurate MAGPRO, Norma MRP rank at the top here: for .300 Weath. 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, Baschieri & Pellagri 109, Norma 217 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.