Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 165gr | Frontier PH HPBT bullet and 92 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-16 and Alliant Reloder-26.
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% | 55,941 psi | 90% | 2858 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,896 psi | 86% | 2867 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,763 psi | 81% | 2900 fps | 98.9% |
| Accurate 4064 | <<locked>> | 86% | 56,173 psi | 90% | 2910 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 53,200 psi | 85% | 2959 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 55,448 psi | 89% | 2943 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,055 psi | 85% | 2890 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,404 psi | 87% | 2999 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,622 psi | 89% | 3068 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,157 psi | 87% | 2992 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,809 psi | 86% | 2917 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,954 psi | 87% | 2936 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,853 psi | 86% | 3015 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,114 psi | 88% | 3045 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,388 psi | 86% | 2982 fps | 97.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,560 psi | 81% | 2979 fps | 96.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,630 psi | 76% | 2920 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,684 psi | 67% | 2828 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,752 psi | 88% | 3117 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,245 psi | 89% | 2956 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 54,549 psi | 87% | 2933 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,560 psi | 81% | 2979 fps | 96.8% |
| Bofors RP7 | <<locked>> | 90% | 54,099 psi | 87% | 2910 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 86% | 54,853 psi | 88% | 2946 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 55,419 psi | 89% | 3012 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 90% | 55,390 psi | 89% | 2969 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 82% | 56,057 psi | 90% | 2949 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,186 psi | 87% | 2943 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,260 psi | 90% | 2986 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,767 psi | 89% | 3051 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,187 psi | 58% | 1834 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,606 psi | 86% | 2900 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,869 psi | 90% | 2927 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,216 psi | 89% | 2907 fps | 98.7% |
| IMR 4350 | <<locked>> | 94% | 54,708 psi | 88% | 2940 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,680 psi | 89% | 2940 fps | 98.7% |
| IMR 4831 | <<locked>> | 94% | 53,679 psi | 86% | 2953 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 55,317 psi | 89% | 2966 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,709 psi | 89% | 2913 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,230 psi | 87% | 2861 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,159 psi | 90% | 2923 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,637 psi | 89% | 2936 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 53,374 psi | 86% | 2920 fps | 98.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,076 psi | 67% | 2740 fps | 97.2% |
| Norma 201 | <<locked>> | 82% | 54,186 psi | 87% | 2884 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,795 psi | 88% | 2881 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,243 psi | 85% | 2923 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,666 psi | 89% | 2995 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 53,708 psi | 86% | 3068 fps | 98.7% |
| Norma URP | <<locked>> | 94% | 55,521 psi | 89% | 2999 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 53,824 psi | 86% | 2946 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,360 psi | 87% | 2999 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,869 psi | 59% | 1877 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,955 psi | 88% | 2930 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,708 psi | 88% | 3005 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,752 psi | 88% | 3041 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 52,953 psi | 85% | 2982 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,303 psi | 89% | 3068 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 54,694 psi | 88% | 2881 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,404 psi | 87% | 2927 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,985 psi | 90% | 2966 fps | 96.4% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,130 psi | 90% | 3025 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 90% | 54,099 psi | 87% | 2910 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,637 psi | 89% | 2936 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,709 psi | 89% | 2913 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,159 psi | 90% | 2923 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,374 psi | 86% | 2920 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,043 psi | 90% | 2986 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,780 psi | 86% | 2910 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,969 psi | 88% | 2815 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,695 psi | 89% | 2815 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,521 psi | 89% | 2887 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,622 psi | 89% | 3018 fps | 97.7% |
| Somchem S335 | <<locked>> | 82% | 54,810 psi | 88% | 2815 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,202 psi | 90% | 2930 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,447 psi | 87% | 2923 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,462 psi | 87% | 3002 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,258 psi | 85% | 2946 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 82% | 55,477 psi | 89% | 2799 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,998 psi | 88% | 2844 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,448 psi | 89% | 2861 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,927 psi | 90% | 2900 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,244 psi | 87% | 2943 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,139 psi | 79% | 2858 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 84% | 53,664 psi | 86% | 2858 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,243 psi | 85% | 2943 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,417 psi | 86% | 3002 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,867 psi | 86% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,680 psi | 89% | 3015 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,033 psi | 69% | 2966 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,824 psi | 86% | 2917 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,548 psi | 86% | 2940 fps | 97.1% |
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 2495 | <<locked>> | 80% | 49,066 psi | 79% | 2759 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,123 psi | 76% | 2749 fps | 96.6% |
| Accurate 3100 | <<locked>> | 90% | 36,042 psi | 58% | 2612 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 46,456 psi | 74% | 2762 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,070 psi | 56% | 2605 fps | 96.8% |
| ADI AR 2206H | <<locked>> | 80% | 51,953 psi | 83% | 2887 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,193 psi | 71% | 2733 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 47,543 psi | 76% | 2874 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,312 psi | 77% | 2943 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,744 psi | 72% | 2818 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,367 psi | 71% | 2756 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,514 psi | 76% | 2828 fps | 99.7% |
| Alliant Reloder-16 | 56.9 gr | 80% | 34,577 psi | 55% | 2618 fps | 96.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,001 psi | 63% | 2749 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,978 psi | 75% | 2864 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,164 psi | 71% | 2854 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,631 psi | 46% | 2470 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 96% | 36,738 psi | 59% | 2707 fps | 96% |
| Alliant Reloder-26 | 67.5 gr | 86% | 32,924 psi | 53% | 2651 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,576 psi | 83% | 2897 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 44,541 psi | 71% | 2766 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 44,164 psi | 71% | 2854 fps | 95% |
| Bofors RP7 | <<locked>> | 82% | 42,148 psi | 68% | 2687 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 45,150 psi | 72% | 2776 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 39,668 psi | 64% | 2713 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 84% | 45,730 psi | 73% | 2795 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 52,518 psi | 84% | 2894 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,010 psi | 51% | 2510 fps | 97.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,052 psi | 79% | 2874 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 41,713 psi | 67% | 2785 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 43% | 1637 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,241 psi | 81% | 2844 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,427 psi | 74% | 2766 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,805 psi | 78% | 2795 fps | 97.7% |
| IMR 4350 | <<locked>> | 86% | 42,583 psi | 68% | 2717 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,901 psi | 66% | 2661 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 33,837 psi | 54% | 2559 fps | 96.4% |
| IMR 4895 | <<locked>> | 80% | 48,718 psi | 78% | 2858 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 52,141 psi | 84% | 2861 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,068 psi | 82% | 2812 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,586 psi | 75% | 2766 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,392 psi | 62% | 2608 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 39,044 psi | 63% | 2644 fps | 95.4% |
| Lovex S071 | <<locked>> | 96% | 37,086 psi | 59% | 2635 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 50,778 psi | 81% | 2828 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,300 psi | 82% | 2828 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,862 psi | 75% | 2812 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 48,385 psi | 78% | 2871 fps | 95.8% |
| Norma MRP | <<locked>> | 92% | 40,741 psi | 65% | 2812 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 35,114 psi | 56% | 2605 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 80% | 47,007 psi | 75% | 2831 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 36,361 psi | 58% | 2641 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,543 psi | 44% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,078 psi | 72% | 2756 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,097 psi | 82% | 2946 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,466 psi | 66% | 2808 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,795 psi | 56% | 2621 fps | 96.3% |
| ReloadSwiss RS 70 | 62.2 gr | 80% | 34,098 psi | 55% | 2618 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 48,399 psi | 78% | 2782 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,076 psi | 67% | 2713 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 96% | 52,591 psi | 84% | 2910 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 94% | 46,006 psi | 74% | 2848 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 82% | 42,148 psi | 68% | 2687 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,392 psi | 62% | 2608 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,141 psi | 84% | 2861 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,586 psi | 75% | 2766 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 39,044 psi | 63% | 2644 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,033 psi | 69% | 2762 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,444 psi | 81% | 2854 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,663 psi | 83% | 2766 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,540 psi | 70% | 2628 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,176 psi | 64% | 2608 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,571 psi | 73% | 2841 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 51,416 psi | 82% | 2766 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,446 psi | 84% | 2874 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,380 psi | 68% | 2710 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 31,604 psi | 51% | 2556 fps | 98.7% |
| Somchem S385 | <<locked>> | 90% | 40,973 psi | 66% | 2713 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 52,185 psi | 84% | 2753 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,414 psi | 78% | 2749 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,834 psi | 78% | 2762 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,538 psi | 65% | 2644 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 36,434 psi | 58% | 2605 fps | 97% |
| Vihtavuori N165 | <<locked>> | 96% | 43,062 psi | 69% | 2746 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 47,152 psi | 76% | 2753 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,998 psi | 58% | 2605 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 82% | 29,356 psi | 47% | 2493 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,708 psi | 57% | 2575 fps | 98.8% |
| Winchester 760 | <<locked>> | 82% | 39,856 psi | 64% | 2717 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,963 psi | 43% | 2493 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,430 psi | 81% | 2861 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,528 psi | 75% | 2818 fps | 95.5% |
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 | 165gr | Frontier PH HPBT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,117 fps; across all powders the maximum-charge window runs from 1,834 fps to 3,117 fps. Accurate 3100 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 58–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, 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. ReloadSwiss RS 70, Alliant Reloder-16, Alliant Reloder-26 rank at the top here: for .300 Win. Mag. with the .308 | 165gr | Frontier PH HPBT they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.