Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 150gr | Impala LW CFN bullet and 85 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-16 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.
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% | 54,563 psi | 87% | 2953 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,622 psi | 89% | 2989 fps | 97.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,895 psi | 83% | 3022 fps | 98.3% |
| Accurate 4064 | <<locked>> | 84% | 54,694 psi | 88% | 3005 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,215 psi | 87% | 3087 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 82% | 55,854 psi | 90% | 3064 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,417 psi | 86% | 3009 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 98% | 54,375 psi | 87% | 3107 fps | 96.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,695 psi | 89% | 3192 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,476 psi | 87% | 3045 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,578 psi | 88% | 3061 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,940 psi | 86% | 3136 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,376 psi | 89% | 3173 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,606 psi | 86% | 3094 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,211 psi | 77% | 3041 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,569 psi | 68% | 2940 fps | 96.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,955 psi | 88% | 3235 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,622 psi | 89% | 3077 fps | 99.8% |
| Bofors RP3 | <<locked>> | 86% | 55,463 psi | 89% | 3064 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 54,607 psi | 88% | 3028 fps | 97.4% |
| Hodgdon H380 | <<locked>> | 86% | 55,709 psi | 89% | 3071 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 88% | 53,577 psi | 86% | 3094 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 92% | 54,012 psi | 87% | 3054 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,360 psi | 87% | 3061 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 53,243 psi | 85% | 3061 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,825 psi | 90% | 3163 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,390 psi | 58% | 1923 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,260 psi | 90% | 3058 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,608 psi | 89% | 3038 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,840 psi | 90% | 3041 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,708 psi | 88% | 3009 fps | 97.9% |
| IMR 4350 | <<locked>> | 94% | 55,100 psi | 88% | 3054 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,985 psi | 90% | 3054 fps | 98.1% |
| IMR 4831 | <<locked>> | 98% | 54,940 psi | 88% | 3084 fps | 99.7% |
| IMR 4895 | <<locked>> | 84% | 55,927 psi | 90% | 3094 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,708 psi | 88% | 2986 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 53,621 psi | 86% | 2999 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,405 psi | 90% | 3058 fps | 99.1% |
| Lovex S070 | <<locked>> | 92% | 54,244 psi | 87% | 3041 fps | 98.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,671 psi | 70% | 2867 fps | 96.6% |
| Norma 201 | <<locked>> | 82% | 55,143 psi | 88% | 3015 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,347 psi | 89% | 3009 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,911 psi | 86% | 3048 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,622 psi | 89% | 3104 fps | 96.4% |
| Norma MRPᴾ | <<locked>> | 100% | 53,809 psi | 86% | 3179 fps | 97.9% |
| Norma URP | <<locked>> | 94% | 55,869 psi | 90% | 3120 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 84% | 54,215 psi | 87% | 3071 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 94% | 54,418 psi | 87% | 3114 fps | 98.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,067 psi | 80% | 3041 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,115 psi | 60% | 1969 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,550 psi | 89% | 3048 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,114 psi | 88% | 3130 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,853 psi | 88% | 3166 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,316 psi | 85% | 3100 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,434 psi | 89% | 3182 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 84% | 55,825 psi | 90% | 3015 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,506 psi | 89% | 3058 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,275 psi | 90% | 3136 fps | 97% |
| Rottweil R 907 | <<locked>> | 90% | 54,607 psi | 88% | 3028 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,405 psi | 90% | 3058 fps | 99.1% |
| Shooters World Precision | <<locked>> | 84% | 53,621 psi | 86% | 2999 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,244 psi | 87% | 3041 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,333 psi | 90% | 3110 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,230 psi | 87% | 3031 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,550 psi | 89% | 2940 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,072 psi | 90% | 2940 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,217 psi | 90% | 3005 fps | 98.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,753 psi | 89% | 3130 fps | 96.8% |
| Somchem S335 | <<locked>> | 82% | 55,492 psi | 89% | 2940 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,405 psi | 89% | 3051 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,563 psi | 87% | 3127 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,882 psi | 86% | 3061 fps | 97.3% |
| Unknown powder | <<locked>> | 90% | 53,127 psi | 85% | 3071 fps | 99.1% |
| Vihtavuori N133 | <<locked>> | 84% | 55,463 psi | 89% | 2920 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,680 psi | 89% | 2972 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,129 psi | 88% | 2979 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 53,447 psi | 86% | 2982 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,563 psi | 86% | 3041 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 84% | 54,897 psi | 88% | 3005 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,012 psi | 87% | 3091 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,157 psi | 87% | 3130 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,114 psi | 87% | 3028 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 53,577 psi | 86% | 3094 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,787 psi | 70% | 3084 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,666 psi | 89% | 3077 fps | 96.5% |
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 2495 | <<locked>> | 80% | 51,445 psi | 82% | 2907 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 46,311 psi | 74% | 2822 fps | 95.3% |
| Accurate 3100 | <<locked>> | 92% | 40,277 psi | 65% | 2799 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 48,617 psi | 78% | 2907 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,637 psi | 59% | 2736 fps | 96.2% |
| ADI AR 2206H | <<locked>> | 80% | 52,533 psi | 84% | 3009 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 44,802 psi | 72% | 2848 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 96% | 51,024 psi | 82% | 3041 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,675 psi | 78% | 3061 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,455 psi | 73% | 2884 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,240 psi | 77% | 2949 fps | 99.4% |
| Alliant Reloder-16 | 57.9 gr | 80% | 35,563 psi | 57% | 2733 fps | 96% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,900 psi | 64% | 2871 fps | 98.9% |
| Alliant Reloder-19 | <<locked>> | 96% | 50,415 psi | 81% | 3035 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 84% | 30,110 psi | 48% | 2598 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 96% | 37,753 psi | 61% | 2818 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 88% | 36,593 psi | 59% | 2838 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,185 psi | 84% | 3018 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 45,992 psi | 74% | 2897 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 45,861 psi | 74% | 2861 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 46,108 psi | 74% | 2897 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 82% | 43,903 psi | 70% | 2904 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 88% | 48,022 psi | 77% | 2943 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,228 psi | 53% | 2631 fps | 97% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,789 psi | 75% | 2946 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 86% | 45,527 psi | 73% | 2966 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 44% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,123 psi | 76% | 2900 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 49,443 psi | 79% | 2943 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,280 psi | 71% | 2831 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,453 psi | 70% | 2789 fps | 95.4% |
| IMR 4350 | <<locked>> | 88% | 45,948 psi | 74% | 2887 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 44,208 psi | 71% | 2831 fps | 95.5% |
| IMR 4831 | <<locked>> | 82% | 34,272 psi | 55% | 2657 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 49,487 psi | 79% | 2982 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 51,561 psi | 83% | 2930 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 47,645 psi | 76% | 2894 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 39,813 psi | 64% | 2736 fps | 95.8% |
| Lovex S070 | <<locked>> | 84% | 42,757 psi | 69% | 2818 fps | 95.4% |
| Lovex S071 | <<locked>> | 96% | 38,725 psi | 62% | 2762 fps | 95% |
| Norma 201 | <<locked>> | 80% | 52,098 psi | 84% | 2963 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,257 psi | 84% | 2959 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,718 psi | 77% | 2936 fps | 99.6% |
| Norma 204 | <<locked>> | 92% | 52,156 psi | 84% | 3045 fps | 95.6% |
| Norma MRP | <<locked>> | 94% | 44,382 psi | 71% | 2992 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 36,216 psi | 58% | 2726 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 47,601 psi | 76% | 2953 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 39,856 psi | 64% | 2822 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 98% | 46,659 psi | 75% | 2972 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,847 psi | 45% | 1762 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,006 psi | 74% | 2874 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,692 psi | 83% | 3071 fps | 99.7% |
| ReloadSwiss RS 60 | 62.4 gr | 80% | 42,221 psi | 68% | 2933 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,042 psi | 58% | 2746 fps | 95.6% |
| ReloadSwiss RS 70 | 64.9 gr | 82% | 37,492 psi | 60% | 2799 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 49,647 psi | 80% | 2910 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,424 psi | 70% | 2841 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 96% | 49,661 psi | 80% | 3022 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 84% | 45,861 psi | 74% | 2861 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,813 psi | 64% | 2736 fps | 95.8% |
| Shooters World Precision | <<locked>> | 80% | 47,645 psi | 76% | 2894 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 42,757 psi | 69% | 2818 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,816 psi | 70% | 2884 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,039 psi | 82% | 2976 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,388 psi | 84% | 2890 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,353 psi | 71% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 44,121 psi | 71% | 2785 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 49,197 psi | 79% | 3015 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 52,489 psi | 84% | 2894 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,758 psi | 70% | 2841 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 32,909 psi | 53% | 2684 fps | 98.3% |
| Somchem S385 | <<locked>> | 92% | 44,788 psi | 72% | 2890 fps | 95.1% |
| Unknown powder | <<locked>> | 80% | 38,740 psi | 62% | 2779 fps | 96.1% |
| Vihtavuori N133 | <<locked>> | 80% | 49,545 psi | 79% | 2831 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,458 psi | 79% | 2881 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,921 psi | 78% | 2881 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,637 psi | 60% | 2680 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 80% | 39,001 psi | 63% | 2756 fps | 96.8% |
| Vihtavuori N540 | <<locked>> | 80% | 48,646 psi | 78% | 2904 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,566 psi | 63% | 2799 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 84% | 32,953 psi | 53% | 2684 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,811 psi | 59% | 2694 fps | 98.4% |
| Winchester 760 | <<locked>> | 82% | 43,903 psi | 70% | 2904 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 88% | 30,356 psi | 49% | 2690 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 96% | 51,822 psi | 83% | 3012 fps | 95.6% |
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 102 powders for .300 Win. Mag. loaded with the .308 | 150gr | Impala LW CFN. Alliant Reloder-26 delivers the highest muzzle velocity at 3,235 fps; across all powders the maximum-charge window runs from 1,923 fps to 3,235 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:13.0 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 60, Alliant Reloder-16, ReloadSwiss RS 70 rank at the top here: for .300 Win. Mag. with the .308 | 150gr | Impala LW CFN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 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.