Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 150gr | Woodleigh HS bullet and 88 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-17 and ReloadSwiss RS 60.
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 2700 | <<locked>> | 88% | 54,114 psi | 87% | 2989 fps | 97.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,603 psi | 80% | 3007 fps | 98.1% |
| Accurate 4064 | <<locked>> | 86% | 54,984 psi | 88% | 3038 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,579 psi | 89% | 3136 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 82% | 54,317 psi | 87% | 3065 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,448 psi | 89% | 3068 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 53,098 psi | 85% | 3105 fps | 96.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,375 psi | 87% | 3191 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,072 psi | 90% | 3094 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,231 psi | 90% | 3114 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,231 psi | 90% | 3195 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 53,896 psi | 86% | 3168 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 52,257 psi | 84% | 3091 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,920 psi | 75% | 3030 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,800 psi | 67% | 2922 fps | 96.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,578 psi | 88% | 3227 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,259 psi | 87% | 3079 fps | 99.7% |
| Bofors RP3 | <<locked>> | 86% | 53,374 psi | 86% | 3054 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 56,333 psi | 90% | 3082 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 86% | 53,882 psi | 86% | 3066 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 90% | 55,651 psi | 89% | 3149 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 94% | 55,956 psi | 90% | 3114 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 82% | 54,897 psi | 88% | 3076 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 52,881 psi | 85% | 3060 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,187 psi | 88% | 3114 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,447 psi | 87% | 3160 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,492 psi | 59% | 1936 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,998 psi | 88% | 3061 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 53,954 psi | 87% | 3038 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,186 psi | 87% | 3038 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 53,316 psi | 85% | 3010 fps | 97.9% |
| IMR 4350 | <<locked>> | 94% | 53,766 psi | 86% | 3058 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,708 psi | 88% | 3058 fps | 98.1% |
| IMR 4831 | <<locked>> | 98% | 53,069 psi | 85% | 3078 fps | 99.7% |
| IMR 4895 | <<locked>> | 84% | 54,230 psi | 87% | 3090 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,491 psi | 87% | 3039 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 53,388 psi | 86% | 2987 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,882 psi | 88% | 3044 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,534 psi | 87% | 3053 fps | 99% |
| Lovex S070 | <<locked>> | 94% | 55,782 psi | 89% | 3093 fps | 98.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,250 psi | 68% | 2839 fps | 96% |
| Norma 201 | <<locked>> | 84% | 56,420 psi | 90% | 3061 fps | 100% |
| Norma 202 | <<locked>> | 82% | 53,548 psi | 86% | 3005 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,492 psi | 89% | 3098 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,317 psi | 87% | 3104 fps | 96.4% |
| Norma MRPᴾ | <<locked>> | 100% | 52,678 psi | 84% | 3174 fps | 97.8% |
| Norma URP | <<locked>> | 94% | 54,230 psi | 87% | 3118 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 86% | 56,333 psi | 90% | 3124 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 52,997 psi | 85% | 3110 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,231 psi | 60% | 1981 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 53,896 psi | 86% | 3046 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 53,403 psi | 86% | 3125 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 53,461 psi | 86% | 3165 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,288 psi | 89% | 3155 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,157 psi | 87% | 3183 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 84% | 53,679 psi | 86% | 3007 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 53,229 psi | 85% | 3046 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,043 psi | 90% | 3138 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 92% | 56,333 psi | 90% | 3082 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,534 psi | 87% | 3053 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,491 psi | 87% | 3039 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,882 psi | 88% | 3044 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,782 psi | 89% | 3094 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,969 psi | 88% | 3110 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,347 psi | 89% | 3063 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,231 psi | 90% | 3088 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,114 psi | 87% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,737 psi | 88% | 2941 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,462 psi | 87% | 3002 fps | 98.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,462 psi | 87% | 3130 fps | 96.8% |
| Somchem S335 | <<locked>> | 82% | 53,679 psi | 86% | 2939 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,245 psi | 89% | 3053 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 53,388 psi | 86% | 3044 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 53,055 psi | 85% | 3121 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 52,504 psi | 84% | 3057 fps | 97.2% |
| Unknown powder | <<locked>> | 92% | 54,897 psi | 88% | 3124 fps | 99.4% |
| Vihtavuori N133 | <<locked>> | 84% | 53,911 psi | 86% | 2923 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 53,766 psi | 86% | 2969 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 53,374 psi | 86% | 2975 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,940 psi | 88% | 3028 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,506 psi | 89% | 3093 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 84% | 53,214 psi | 85% | 3002 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,956 psi | 90% | 3144 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,447 psi | 86% | 3116 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 52,736 psi | 85% | 3026 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,651 psi | 89% | 3149 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,511 psi | 68% | 3065 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,172 psi | 87% | 3075 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 2700 | <<locked>> | 82% | 44,396 psi | 71% | 2812 fps | 95% |
| Accurate 3100 | <<locked>> | 94% | 40,292 psi | 65% | 2823 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 45,411 psi | 73% | 2881 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,026 psi | 55% | 2697 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 50,821 psi | 81% | 3004 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 43,178 psi | 69% | 2841 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 96% | 49,792 psi | 80% | 3043 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,152 psi | 76% | 3056 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,381 psi | 70% | 2867 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,412 psi | 74% | 2939 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,649 psi | 54% | 2708 fps | 95.4% |
| Alliant Reloder-17 | 64.3 gr | 80% | 37,898 psi | 61% | 2846 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 96% | 49,037 psi | 79% | 3031 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 86% | 29,718 psi | 48% | 2612 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 98% | 38,189 psi | 61% | 2856 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 90% | 36,956 psi | 59% | 2873 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,575 psi | 81% | 3016 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 43,540 psi | 70% | 2877 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 43,859 psi | 70% | 2847 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 44,150 psi | 71% | 2884 fps | 98% |
| Hodgdon H414 | <<locked>> | 82% | 42,221 psi | 68% | 2892 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 88% | 46,427 psi | 74% | 2936 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 51,387 psi | 82% | 3017 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,125 psi | 50% | 2601 fps | 96.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,208 psi | 72% | 2940 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 86% | 43,787 psi | 70% | 2952 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,934 psi | 43% | 1734 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,527 psi | 73% | 2894 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 47,442 psi | 76% | 2933 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,366 psi | 68% | 2818 fps | 98.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,785 psi | 67% | 2779 fps | 95.1% |
| IMR 4350 | <<locked>> | 88% | 44,469 psi | 71% | 2881 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 82% | 42,656 psi | 68% | 2825 fps | 95.2% |
| IMR 4831 | <<locked>> | 84% | 34,098 psi | 55% | 2683 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 47,601 psi | 76% | 2971 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 50,937 psi | 82% | 2982 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,227 psi | 81% | 2934 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 45,658 psi | 73% | 2885 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 37,608 psi | 60% | 2711 fps | 95.2% |
| Lovex S070 | <<locked>> | 84% | 40,683 psi | 65% | 2800 fps | 95% |
| Lovex S071 | <<locked>> | 98% | 39,262 psi | 63% | 2783 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 49,792 psi | 80% | 2952 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,285 psi | 81% | 2953 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,788 psi | 73% | 2925 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 50,662 psi | 81% | 3039 fps | 95.5% |
| Norma MRP | <<locked>> | 94% | 42,525 psi | 68% | 2971 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 34,185 psi | 55% | 2698 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 45,847 psi | 74% | 2943 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 40,625 psi | 65% | 2863 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,383 psi | 44% | 1775 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,237 psi | 71% | 2862 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,792 psi | 80% | 3061 fps | 99.6% |
| ReloadSwiss RS 60 | 64.3 gr | 80% | 40,306 psi | 65% | 2916 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 36,332 psi | 58% | 2775 fps | 95.9% |
| ReloadSwiss RS 70 | 68.6 gr | 84% | 38,232 psi | 61% | 2844 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 47,340 psi | 76% | 2897 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,046 psi | 66% | 2819 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 96% | 47,935 psi | 77% | 3012 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 84% | 43,859 psi | 70% | 2847 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,608 psi | 60% | 2711 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,937 psi | 82% | 2982 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,658 psi | 73% | 2885 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 40,683 psi | 65% | 2799 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,989 psi | 67% | 2869 fps | 98.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,779 psi | 83% | 3001 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,327 psi | 79% | 2971 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,734 psi | 81% | 2890 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,670 psi | 68% | 2746 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 41,901 psi | 67% | 2767 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 47,485 psi | 76% | 3005 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 50,502 psi | 81% | 2888 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,459 psi | 83% | 2992 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 41,466 psi | 66% | 2819 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 30,690 psi | 49% | 2646 fps | 97.6% |
| Somchem S385 | <<locked>> | 94% | 45,759 psi | 73% | 2935 fps | 95.6% |
| Unknown powder | <<locked>> | 80% | 36,854 psi | 59% | 2757 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 47,892 psi | 77% | 2829 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,398 psi | 76% | 2874 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,036 psi | 75% | 2871 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,520 psi | 57% | 2659 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 80% | 36,999 psi | 59% | 2733 fps | 96.3% |
| Vihtavuori N540 | <<locked>> | 80% | 46,804 psi | 75% | 2894 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,623 psi | 60% | 2778 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 86% | 32,518 psi | 52% | 2694 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,983 psi | 56% | 2671 fps | 98% |
| Winchester 760 | <<locked>> | 82% | 42,221 psi | 68% | 2892 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 30,066 psi | 48% | 2707 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 96% | 50,386 psi | 81% | 3011 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 88 powders for .300 Win. Mag. loaded with the .308 | 150gr | Woodleigh HS. Alliant Reloder-26 delivers the highest muzzle velocity at 3,227 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,227 fps. Accurate 3100 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-25 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-17, ReloadSwiss RS 60 rank at the top here: for .300 Win. Mag. with the .308 | 150gr | Woodleigh HS 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.