Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 152gr | Remington SP Extended-Range bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Hodgdon Superformance.
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>> | 84% | 56,115 psi | 90% | 2986 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,896 psi | 86% | 2989 fps | 97.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,097 psi | 82% | 3018 fps | 98.5% |
| Accurate 4064 | <<locked>> | 86% | 56,347 psi | 90% | 3041 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 53,258 psi | 85% | 3084 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 82% | 55,332 psi | 89% | 3068 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,258 psi | 85% | 3018 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 54,404 psi | 87% | 3117 fps | 96.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,724 psi | 89% | 3196 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,722 psi | 86% | 3041 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,114 psi | 87% | 3064 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,983 psi | 87% | 3143 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,463 psi | 89% | 3176 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,795 psi | 86% | 3107 fps | 96.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,937 psi | 82% | 3100 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,848 psi | 77% | 3041 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,901 psi | 67% | 2940 fps | 97.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,027 psi | 88% | 3241 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,477 psi | 89% | 3084 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 54,679 psi | 88% | 3061 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,937 psi | 82% | 3100 fps | 96.3% |
| Bofors RP7 | <<locked>> | 90% | 54,056 psi | 87% | 3031 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 86% | 55,100 psi | 88% | 3074 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 92% | 55,738 psi | 89% | 3136 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 90% | 55,521 psi | 89% | 3094 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 82% | 55,985 psi | 90% | 3077 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,418 psi | 87% | 3068 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,275 psi | 90% | 3114 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,072 psi | 90% | 3176 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,187 psi | 58% | 1932 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,563 psi | 86% | 3025 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,144 psi | 90% | 3058 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,317 psi | 89% | 3031 fps | 98.4% |
| IMR 4350 | <<locked>> | 94% | 54,882 psi | 88% | 3061 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,840 psi | 90% | 3064 fps | 98.4% |
| IMR 4831 | <<locked>> | 94% | 53,867 psi | 86% | 3074 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 55,521 psi | 89% | 3097 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,869 psi | 90% | 3045 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,360 psi | 87% | 2989 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,159 psi | 90% | 3048 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,680 psi | 89% | 3058 fps | 99.3% |
| Lovex S070 | <<locked>> | 92% | 53,577 psi | 86% | 3045 fps | 98.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,366 psi | 68% | 2854 fps | 96.7% |
| Norma 201 | <<locked>> | 82% | 54,056 psi | 87% | 3009 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,839 psi | 88% | 3012 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,417 psi | 86% | 3051 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,695 psi | 89% | 3114 fps | 96.9% |
| Norma MRPᴾ | <<locked>> | 100% | 54,012 psi | 87% | 3189 fps | 98.3% |
| Norma URP | <<locked>> | 94% | 55,782 psi | 89% | 3127 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 84% | 53,925 psi | 86% | 3071 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,462 psi | 87% | 3120 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,796 psi | 59% | 1978 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,042 psi | 88% | 3054 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,824 psi | 88% | 3133 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,781 psi | 88% | 3169 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,127 psi | 85% | 3104 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,535 psi | 89% | 3192 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 54,694 psi | 88% | 3009 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,534 psi | 87% | 3054 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,333 psi | 90% | 3091 fps | 96% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,434 psi | 90% | 3150 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 90% | 54,056 psi | 87% | 3031 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,680 psi | 89% | 3058 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,869 psi | 90% | 3045 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,159 psi | 90% | 3048 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,577 psi | 86% | 3045 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,217 psi | 90% | 3114 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,867 psi | 86% | 3035 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,129 psi | 88% | 2946 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,956 psi | 90% | 2943 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,564 psi | 89% | 3009 fps | 98.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,927 psi | 90% | 3146 fps | 97.4% |
| Somchem S335 | <<locked>> | 82% | 54,621 psi | 88% | 2936 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,434 psi | 90% | 3058 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,650 psi | 88% | 3051 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,708 psi | 88% | 3130 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,606 psi | 86% | 3068 fps | 97.7% |
| Vihtavuori N133 | <<locked>> | 82% | 55,622 psi | 89% | 2927 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,926 psi | 88% | 2972 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,477 psi | 89% | 2989 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,101 psi | 90% | 3025 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,302 psi | 87% | 3064 fps | 99.7% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,371 psi | 79% | 2976 fps | 96.4% |
| Vihtavuori N540 | <<locked>> | 84% | 53,635 psi | 86% | 2979 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,359 psi | 86% | 3068 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,664 psi | 86% | 3127 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,998 psi | 87% | 3031 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,738 psi | 89% | 3136 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,178 psi | 69% | 3081 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,998 psi | 87% | 3045 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,824 psi | 86% | 3058 fps | 96.7% |
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% | 49,110 psi | 79% | 2884 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,297 psi | 76% | 2867 fps | 96.1% |
| Accurate 3100 | <<locked>> | 92% | 38,769 psi | 62% | 2776 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 46,499 psi | 75% | 2884 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,172 psi | 56% | 2713 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 80% | 52,083 psi | 84% | 3012 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 44,077 psi | 71% | 2848 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 94% | 47,703 psi | 76% | 2989 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,356 psi | 78% | 3064 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,556 psi | 71% | 2877 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,587 psi | 76% | 2949 fps | 99.5% |
| Alliant Reloder-16 | 60.5 gr | 80% | 34,490 psi | 55% | 2720 fps | 96.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,972 psi | 62% | 2858 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 94% | 47,108 psi | 76% | 2982 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 47,558 psi | 76% | 3035 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,689 psi | 46% | 2569 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 96% | 36,898 psi | 59% | 2812 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 88% | 35,418 psi | 57% | 2818 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,764 psi | 83% | 3022 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 44,570 psi | 71% | 2884 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 47,558 psi | 76% | 3035 fps | 95.4% |
| Bofors RP7 | <<locked>> | 84% | 44,904 psi | 72% | 2858 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 45,107 psi | 72% | 2890 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 84% | 42,583 psi | 68% | 2884 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 84% | 45,788 psi | 73% | 2913 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 52,634 psi | 84% | 3022 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,966 psi | 51% | 2612 fps | 96.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,066 psi | 79% | 2995 fps | 100% |
| Hodgdon Superformance | 74.1 gr | 86% | 44,991 psi | 72% | 2966 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 43% | 1726 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,343 psi | 81% | 2969 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,354 psi | 74% | 2887 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,834 psi | 78% | 2913 fps | 97.2% |
| IMR 4350 | <<locked>> | 86% | 42,772 psi | 69% | 2831 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 82% | 43,642 psi | 70% | 2835 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 33,939 psi | 54% | 2664 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 48,820 psi | 78% | 2979 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 52,257 psi | 84% | 2989 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,155 psi | 82% | 2936 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 46,644 psi | 75% | 2887 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,435 psi | 62% | 2720 fps | 95.8% |
| Lovex S070 | <<locked>> | 84% | 41,713 psi | 67% | 2812 fps | 95.6% |
| Lovex S071 | <<locked>> | 98% | 39,624 psi | 64% | 2795 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 50,850 psi | 82% | 2956 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,532 psi | 83% | 2959 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,963 psi | 75% | 2933 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 48,588 psi | 78% | 2989 fps | 95.3% |
| Norma MRP | <<locked>> | 94% | 43,743 psi | 70% | 2986 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 35,114 psi | 56% | 2707 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 47,050 psi | 75% | 2953 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 38,957 psi | 62% | 2812 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,499 psi | 44% | 1772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,281 psi | 73% | 2874 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,184 psi | 82% | 3071 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,408 psi | 66% | 2923 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,780 psi | 56% | 2723 fps | 95.5% |
| ReloadSwiss RS 70 | 67.9 gr | 82% | 36,651 psi | 59% | 2792 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 48,341 psi | 78% | 2904 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,047 psi | 67% | 2828 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 96% | 52,649 psi | 84% | 3028 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 94% | 46,195 psi | 74% | 2963 fps | 95% |
| Rottweil R 907 | <<locked>> | 84% | 44,904 psi | 72% | 2858 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,435 psi | 62% | 2720 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,257 psi | 84% | 2989 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,644 psi | 75% | 2887 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 41,713 psi | 67% | 2812 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,105 psi | 69% | 2877 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,531 psi | 81% | 2979 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,750 psi | 83% | 2894 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,598 psi | 70% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,306 psi | 65% | 2720 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 48,892 psi | 78% | 3018 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 51,459 psi | 83% | 2890 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,663 psi | 84% | 2999 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,409 psi | 68% | 2825 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 31,531 psi | 51% | 2657 fps | 98.1% |
| Somchem S385 | <<locked>> | 92% | 44,019 psi | 71% | 2887 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 52,243 psi | 84% | 2877 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,501 psi | 78% | 2874 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,805 psi | 78% | 2884 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,509 psi | 65% | 2756 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 36,506 psi | 59% | 2710 fps | 96.4% |
| Vihtavuori N165 | <<locked>> | 98% | 46,282 psi | 74% | 2920 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 47,123 psi | 76% | 2874 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,984 psi | 58% | 2710 fps | 96% |
| Vihtavuori N555 | <<locked>> | 84% | 31,444 psi | 50% | 2651 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,853 psi | 57% | 2680 fps | 98.4% |
| Winchester 760 | <<locked>> | 84% | 42,583 psi | 68% | 2884 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,892 psi | 46% | 2657 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,343 psi | 81% | 2982 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 50,111 psi | 80% | 2995 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 106 powders for .300 Win. Mag. loaded with the .308 | 152gr | Remington SP Extended-Range. Alliant Reloder-26 delivers the highest muzzle velocity at 3,241 fps; across all powders the maximum-charge window runs from 1,932 fps to 3,241 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 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 152.0 gr projectile in 0.308" calls for a 1:17.0 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. Alliant Reloder-16, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for .300 Win. Mag. with the .308 | 152gr | Remington SP Extended-Range they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Hodgdon H1000 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.