Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 170gr | Winchester FN Pow.Point 30-30 bullet and 85 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and ReloadSwiss RS 70.
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% | 54,389 psi | 87% | 2861 fps | 98.6% |
| Accurate 3100 | <<locked>> | 98% | 52,953 psi | 85% | 2910 fps | 99.5% |
| Accurate 4064 | <<locked>> | 82% | 53,896 psi | 86% | 2848 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,737 psi | 88% | 2956 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 55,071 psi | 88% | 3048 fps | 96% |
| ADI AR 2208 | <<locked>> | 84% | 53,954 psi | 87% | 2884 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,709 psi | 89% | 3002 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 98% | 53,417 psi | 86% | 2992 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,708 psi | 88% | 2904 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,824 psi | 88% | 2927 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,492 psi | 89% | 3015 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,084 psi | 85% | 2982 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,114 psi | 88% | 2989 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,376 psi | 90% | 3051 fps | 98.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,142 psi | 85% | 2976 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,180 psi | 74% | 2907 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,301 psi | 85% | 3061 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,619 psi | 83% | 2972 fps | 97.6% |
| Bofors RP3 | <<locked>> | 84% | 55,637 psi | 89% | 2923 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,376 psi | 90% | 3051 fps | 98.5% |
| Bofors RP7 | <<locked>> | 88% | 54,868 psi | 88% | 2904 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 55,898 psi | 90% | 2936 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 53,359 psi | 86% | 2953 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 56,434 psi | 90% | 2969 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 96% | 53,505 psi | 86% | 2936 fps | 96% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,130 psi | 90% | 2979 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,014 psi | 90% | 2940 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,150 psi | 72% | 2936 fps | 96.8% |
| Hodgdon Superformance | <<locked>> | 88% | 53,272 psi | 85% | 2986 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 59% | 1837 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,388 psi | 86% | 2864 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,593 psi | 89% | 2894 fps | 99.2% |
| IMR 4350 | <<locked>> | 92% | 55,985 psi | 90% | 2940 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,040 psi | 85% | 2877 fps | 98.9% |
| IMR 4831 | <<locked>> | 92% | 55,187 psi | 88% | 2949 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,231 psi | 90% | 2953 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,100 psi | 88% | 2930 fps | 96.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,389 psi | 87% | 3025 fps | 97% |
| Lovex S062 | <<locked>> | 82% | 53,606 psi | 86% | 2858 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,359 psi | 86% | 2877 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 54,679 psi | 88% | 2923 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,065 psi | 75% | 2812 fps | 98.8% |
| Norma 203B | <<locked>> | 82% | 54,143 psi | 87% | 2910 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,113 psi | 85% | 2933 fps | 97.6% |
| Norma MRP | <<locked>> | 98% | 56,057 psi | 90% | 3081 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 53,534 psi | 86% | 2943 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,998 psi | 88% | 2940 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,042 psi | 88% | 3045 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 92% | 55,869 psi | 90% | 2995 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,226 psi | 79% | 2913 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,260 psi | 60% | 1880 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,753 psi | 89% | 2923 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,376 psi | 90% | 3028 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,737 psi | 88% | 2982 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,055 psi | 85% | 3005 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,208 psi | 72% | 2930 fps | 98% |
| Rottweil R 902 | <<locked>> | 82% | 55,347 psi | 89% | 2867 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,767 psi | 89% | 2917 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,795 psi | 86% | 2913 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 96% | 54,331 psi | 87% | 2972 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 88% | 54,868 psi | 88% | 2904 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,359 psi | 86% | 2877 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 53,606 psi | 86% | 2858 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,679 psi | 88% | 2923 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,679 psi | 86% | 2923 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,434 psi | 90% | 2799 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,405 psi | 90% | 2884 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,867 psi | 86% | 2969 fps | 98.1% |
| Somchem S355 | <<locked>> | 86% | 55,666 psi | 89% | 2913 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,492 psi | 89% | 2907 fps | 96.4% |
| Somchem S365 | <<locked>> | 92% | 52,997 psi | 85% | 2946 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,056 psi | 88% | 2949 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 55,985 psi | 90% | 2828 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,970 psi | 90% | 2841 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 53,388 psi | 86% | 2835 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,448 psi | 89% | 2936 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,346 psi | 87% | 2923 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 82% | 54,244 psi | 87% | 2838 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,795 psi | 88% | 2943 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,840 psi | 90% | 3005 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,217 psi | 90% | 3068 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,201 psi | 89% | 2904 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 53,359 psi | 86% | 2953 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,588 psi | 78% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,158 psi | 88% | 2946 fps | 98.1% |
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 2700 | <<locked>> | 80% | 50,981 psi | 82% | 2805 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 35,099 psi | 56% | 2562 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 50,662 psi | 81% | 2802 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,972 psi | 62% | 2667 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 96% | 51,184 psi | 82% | 2982 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 47,500 psi | 76% | 2772 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,859 psi | 69% | 2762 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 96% | 49,908 psi | 80% | 2930 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,341 psi | 78% | 2802 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,547 psi | 83% | 2874 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,652 psi | 60% | 2674 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,902 psi | 69% | 2805 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,598 psi | 68% | 2756 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 92% | 43,047 psi | 69% | 2808 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,731 psi | 44% | 2421 fps | 96.2% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,605 psi | 54% | 2605 fps | 95.6% |
| Alliant Reloder-26 | 68.5 gr | 82% | 31,879 psi | 51% | 2598 fps | 95.7% |
| Bofors RP15 | <<locked>> | 94% | 42,438 psi | 68% | 2795 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 48,631 psi | 78% | 2812 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 43,047 psi | 69% | 2808 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 42,670 psi | 68% | 2680 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 80% | 48,965 psi | 79% | 2825 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 40,814 psi | 65% | 2713 fps | 96.5% |
| Hodgdon H4350 | <<locked>> | 80% | 43,569 psi | 70% | 2733 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 94% | 49,980 psi | 80% | 2877 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,359 psi | 84% | 2917 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,230 psi | 56% | 2566 fps | 99% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,424 psi | 68% | 2871 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 39,711 psi | 64% | 2720 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,238 psi | 44% | 1640 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,980 psi | 80% | 2808 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,359 psi | 84% | 2841 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 38,276 psi | 61% | 2605 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,048 psi | 71% | 2710 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 37,391 psi | 60% | 2618 fps | 98.1% |
| IMR 4895 | <<locked>> | 80% | 52,895 psi | 85% | 2900 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,588 psi | 78% | 2815 fps | 95% |
| IMR 7828 SSC | <<locked>> | 96% | 47,616 psi | 76% | 2900 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 50,401 psi | 81% | 2805 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,640 psi | 67% | 2661 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 39,929 psi | 64% | 2644 fps | 96.4% |
| Lovex S071 | <<locked>> | 90% | 34,040 psi | 55% | 2536 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 50,908 psi | 82% | 2858 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,352 psi | 70% | 2753 fps | 95.2% |
| Norma MRP | 71.4 gr | 88% | 39,479 psi | 63% | 2759 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 38,609 psi | 62% | 2661 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 51,300 psi | 82% | 2881 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 47,703 psi | 76% | 2910 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 37,420 psi | 60% | 2644 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 94% | 39,523 psi | 63% | 2717 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,920 psi | 45% | 1683 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,979 psi | 79% | 2808 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,542 psi | 73% | 2858 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,609 psi | 62% | 2684 fps | 98.1% |
| ReloadSwiss RS 70 | 66.2 gr | 80% | 37,376 psi | 60% | 2687 fps | 97.5% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,320 psi | 63% | 2789 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 52,054 psi | 83% | 2818 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,905 psi | 74% | 2759 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,282 psi | 76% | 2799 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 88% | 41,771 psi | 67% | 2740 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 42,670 psi | 68% | 2680 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,640 psi | 67% | 2661 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 50,401 psi | 81% | 2805 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,929 psi | 64% | 2644 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,050 psi | 75% | 2812 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,934 psi | 75% | 2661 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,785 psi | 65% | 2605 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,379 psi | 66% | 2733 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 46,035 psi | 74% | 2756 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 52,069 psi | 83% | 2851 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 35,012 psi | 56% | 2615 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 39,769 psi | 64% | 2664 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 52,547 psi | 84% | 2782 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,649 psi | 84% | 2795 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,034 psi | 71% | 2684 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,030 psi | 64% | 2661 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 92% | 41,727 psi | 67% | 2697 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 50,850 psi | 82% | 2789 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,421 psi | 63% | 2661 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 30,647 psi | 49% | 2500 fps | 96.4% |
| Vihtavuori N560 | <<locked>> | 94% | 48,892 psi | 78% | 2936 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,073 psi | 63% | 2628 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 40,988 psi | 66% | 2717 fps | 96.5% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,208 psi | 42% | 2454 fps | 96.1% |
| Winchester Supreme 780 | <<locked>> | 92% | 44,701 psi | 72% | 2762 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 92 powders for .300 Win. Mag. loaded with the .308 | 170gr | Winchester FN Pow.Point 30-30. Norma MRP delivers the highest muzzle velocity at 3,081 fps; across all powders the maximum-charge window runs from 1,837 fps to 3,081 fps. ADI AR 2217 gives the best case fill at 100 %, and 92 of the 92 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.308" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-22 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, Norma MRP, ReloadSwiss RS 70 rank at the top here: for .300 Win. Mag. with the .308 | 170gr | Winchester FN Pow.Point 30-30 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.