Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 155gr | Norma GTX bullet and 93 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Winchester 760.
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% | 55,042 psi | 88% | 2940 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,026 psi | 85% | 2940 fps | 97.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,821 psi | 80% | 2966 fps | 98.3% |
| Accurate 4064 | <<locked>> | 86% | 55,347 psi | 89% | 2995 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,811 psi | 89% | 3091 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 54,607 psi | 88% | 3022 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,840 psi | 90% | 3028 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 53,388 psi | 86% | 3068 fps | 96.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,737 psi | 88% | 3150 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,318 psi | 90% | 3048 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,214 psi | 85% | 3015 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,113 psi | 85% | 3094 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,157 psi | 87% | 3123 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 56,101 psi | 90% | 3114 fps | 97.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,792 psi | 80% | 3048 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,833 psi | 75% | 2992 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,944 psi | 66% | 2887 fps | 97% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,679 psi | 86% | 3189 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,534 psi | 87% | 3035 fps | 99.8% |
| Bofors RP3 | <<locked>> | 86% | 53,621 psi | 86% | 3012 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,792 psi | 80% | 3048 fps | 96% |
| Bofors RP7 | <<locked>> | 90% | 53,403 psi | 86% | 2986 fps | 97.6% |
| Hodgdon H380 | <<locked>> | 86% | 54,143 psi | 87% | 3025 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 92% | 54,520 psi | 87% | 3087 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 90% | 54,505 psi | 87% | 3045 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 82% | 55,216 psi | 89% | 3031 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,330 psi | 86% | 3018 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,274 psi | 89% | 3068 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,940 psi | 88% | 3123 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,114 psi | 58% | 1903 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,318 psi | 90% | 3035 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,680 psi | 89% | 3012 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,216 psi | 89% | 3009 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,549 psi | 87% | 2986 fps | 98.3% |
| IMR 4350 | <<locked>> | 94% | 53,969 psi | 87% | 3015 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,998 psi | 88% | 3015 fps | 98.3% |
| IMR 4831 | <<locked>> | 96% | 56,376 psi | 90% | 3084 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 54,592 psi | 88% | 3048 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,926 psi | 88% | 2995 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 53,606 psi | 86% | 2946 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,259 psi | 89% | 3002 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,868 psi | 88% | 3012 fps | 99.2% |
| Lovex S070 | <<locked>> | 94% | 56,202 psi | 90% | 3054 fps | 98.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,495 psi | 67% | 2808 fps | 96.5% |
| Norma 201 | <<locked>> | 82% | 53,258 psi | 85% | 2963 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,027 psi | 87% | 2963 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,970 psi | 90% | 3058 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,607 psi | 88% | 3064 fps | 96.7% |
| Norma MRPᴾ | <<locked>> | 100% | 52,721 psi | 85% | 3136 fps | 98.1% |
| Norma URP | <<locked>> | 94% | 54,708 psi | 88% | 3077 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 84% | 53,011 psi | 85% | 3025 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 53,359 psi | 86% | 3071 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,738 psi | 59% | 1946 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,186 psi | 87% | 3005 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 53,867 psi | 86% | 3084 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 53,679 psi | 86% | 3120 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,695 psi | 89% | 3114 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,360 psi | 87% | 3140 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 84% | 53,940 psi | 86% | 2963 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 53,679 psi | 86% | 3005 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,274 psi | 89% | 3041 fps | 95.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,390 psi | 89% | 3100 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 90% | 53,403 psi | 86% | 2986 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,868 psi | 88% | 3012 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,926 psi | 88% | 2995 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,259 psi | 89% | 3002 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,202 psi | 90% | 3054 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,332 psi | 89% | 3068 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,854 psi | 90% | 3022 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,055 psi | 85% | 2989 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,273 psi | 87% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,056 psi | 88% | 2900 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,824 psi | 88% | 2963 fps | 98.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,897 psi | 88% | 3094 fps | 97.2% |
| Somchem S335 | <<locked>> | 82% | 53,925 psi | 86% | 2894 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,492 psi | 89% | 3009 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 53,838 psi | 86% | 3005 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 53,403 psi | 86% | 3081 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,173 psi | 90% | 3077 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 82% | 54,694 psi | 88% | 2881 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,244 psi | 87% | 2930 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,578 psi | 88% | 2943 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,172 psi | 88% | 2979 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,272 psi | 85% | 3018 fps | 99.7% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,240 psi | 77% | 2923 fps | 96.1% |
| Vihtavuori N540 | <<locked>> | 86% | 56,289 psi | 90% | 2986 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,101 psi | 90% | 3077 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,475 psi | 84% | 3077 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,084 psi | 85% | 2986 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,752 psi | 88% | 3091 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,235 psi | 68% | 3028 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 52,968 psi | 85% | 2995 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,707 psi | 85% | 3009 fps | 96.4% |
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% | 48,443 psi | 78% | 2841 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,543 psi | 75% | 2822 fps | 95.9% |
| Accurate 3100 | <<locked>> | 92% | 37,840 psi | 61% | 2730 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 45,818 psi | 73% | 2841 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,432 psi | 55% | 2667 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 51,285 psi | 82% | 2966 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 43,511 psi | 70% | 2805 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 96% | 49,995 psi | 80% | 3005 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,529 psi | 76% | 3018 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,758 psi | 70% | 2831 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,818 psi | 75% | 2900 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,953 psi | 54% | 2677 fps | 95.9% |
| Alliant Reloder-17 | 63.2 gr | 80% | 38,218 psi | 61% | 2812 fps | 98.9% |
| Alliant Reloder-19 | <<locked>> | 96% | 49,313 psi | 79% | 2995 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,398 psi | 74% | 2982 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 86% | 29,965 psi | 48% | 2582 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 98% | 38,464 psi | 62% | 2825 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 88% | 34,693 psi | 56% | 2772 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,024 psi | 82% | 2976 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 43,830 psi | 70% | 2838 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 46,398 psi | 74% | 2982 fps | 95.1% |
| Bofors RP7 | <<locked>> | 84% | 44,121 psi | 71% | 2808 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 44,396 psi | 71% | 2844 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 84% | 41,698 psi | 67% | 2838 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 86% | 48,037 psi | 77% | 2923 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 51,822 psi | 83% | 2976 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,430 psi | 50% | 2572 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,356 psi | 78% | 2953 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 44,034 psi | 71% | 2913 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 43% | 1699 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,574 psi | 79% | 2923 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,083 psi | 84% | 2959 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,745 psi | 73% | 2841 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,153 psi | 77% | 2867 fps | 97.1% |
| IMR 4350 | <<locked>> | 88% | 44,657 psi | 72% | 2841 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 82% | 42,844 psi | 69% | 2785 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 33,272 psi | 53% | 2621 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 48,022 psi | 77% | 2933 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 51,271 psi | 82% | 2940 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,343 psi | 81% | 2887 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 45,832 psi | 73% | 2841 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,913 psi | 61% | 2680 fps | 95.7% |
| Lovex S070 | <<locked>> | 84% | 40,959 psi | 66% | 2766 fps | 95.4% |
| Lovex S071 | <<locked>> | 98% | 38,754 psi | 62% | 2749 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 50,198 psi | 80% | 2910 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,705 psi | 81% | 2913 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,224 psi | 74% | 2890 fps | 99.6% |
| Norma 204 | <<locked>> | 90% | 47,674 psi | 76% | 2940 fps | 95% |
| Norma MRP | <<locked>> | 94% | 42,830 psi | 69% | 2936 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 34,403 psi | 55% | 2664 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 46,253 psi | 74% | 2907 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 38,305 psi | 61% | 2769 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,369 psi | 44% | 1739 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,541 psi | 71% | 2825 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,154 psi | 80% | 3018 fps | 99.7% |
| ReloadSwiss RS 60 | 63.2 gr | 80% | 40,640 psi | 65% | 2877 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,185 psi | 55% | 2680 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 35,940 psi | 58% | 2746 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 47,703 psi | 76% | 2858 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,220 psi | 66% | 2779 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 96% | 51,822 psi | 83% | 2982 fps | 95% |
| Rottweil R 905 | <<locked>> | 96% | 48,428 psi | 78% | 2976 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 84% | 44,121 psi | 71% | 2808 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,913 psi | 61% | 2680 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,271 psi | 82% | 2940 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,832 psi | 73% | 2841 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 40,959 psi | 66% | 2766 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,279 psi | 68% | 2831 fps | 99.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,199 psi | 84% | 2963 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,647 psi | 80% | 2930 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,039 psi | 82% | 2848 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,946 psi | 69% | 2707 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 42,192 psi | 68% | 2730 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 47,964 psi | 77% | 2972 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 50,850 psi | 82% | 2848 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,924 psi | 83% | 2953 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 41,829 psi | 67% | 2782 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 30,893 psi | 50% | 2612 fps | 98% |
| Somchem S385 | <<locked>> | 92% | 43,120 psi | 69% | 2841 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 51,503 psi | 83% | 2835 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,732 psi | 77% | 2828 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,008 psi | 77% | 2841 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,813 psi | 64% | 2710 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 35,853 psi | 57% | 2667 fps | 96.3% |
| Vihtavuori N165 | <<locked>> | 98% | 45,136 psi | 72% | 2864 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 46,485 psi | 75% | 2831 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,375 psi | 57% | 2667 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 84% | 30,806 psi | 49% | 2608 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,288 psi | 57% | 2641 fps | 98.3% |
| Winchester 760 | 65 gr | 84% | 41,872 psi | 67% | 2841 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,355 psi | 45% | 2612 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,719 psi | 80% | 2940 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 48,994 psi | 79% | 2943 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 93 powders for .300 Win. Mag. loaded with the .308 | 155gr | Norma GTX. Alliant Reloder-26 delivers the highest muzzle velocity at 3,189 fps; across all powders the maximum-charge window runs from 1,903 fps to 3,189 fps. Accurate 3100 gives the best case fill at 100 %, and 93 of the 93 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 155.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-19, 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-17, ReloadSwiss RS 60, Winchester 760 rank at the top here: for .300 Win. Mag. with the .308 | 155gr | Norma GTX 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.