Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 156gr | Reichenberg HDB Ogival 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-26 and Alliant Reloder-17.
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% | 54,360 psi | 85% | 2953 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,217 psi | 88% | 3028 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,099 psi | 85% | 3064 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 54,868 psi | 86% | 3012 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,289 psi | 88% | 3127 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,564 psi | 87% | 3051 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 57,479 psi | 90% | 3169 fps | 98.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,172 psi | 86% | 3159 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,795 psi | 86% | 3173 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,260 psi | 88% | 3074 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,420 psi | 88% | 3097 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,174 psi | 90% | 3189 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,737 psi | 86% | 3153 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,869 psi | 89% | 3156 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,056 psi | 85% | 3150 fps | 97.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,908 psi | 80% | 3081 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,280 psi | 69% | 2995 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,955 psi | 86% | 3228 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,414 psi | 77% | 3064 fps | 96.5% |
| Bofors RP3 | <<locked>> | 86% | 57,043 psi | 89% | 3087 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,056 psi | 85% | 3150 fps | 97.7% |
| Bofors RP7 | <<locked>> | 90% | 56,579 psi | 89% | 3074 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 86% | 57,653 psi | 90% | 3110 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 54,766 psi | 86% | 3117 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 88% | 54,708 psi | 86% | 3081 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,551 psi | 90% | 3104 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,317 psi | 87% | 3094 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 55,230 psi | 87% | 3153 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,172 psi | 57% | 1939 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,796 psi | 87% | 3054 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,911 psi | 86% | 3031 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,667 psi | 90% | 3071 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 54,041 psi | 85% | 3048 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,737 psi | 86% | 3045 fps | 98.7% |
| IMR 4831 | <<locked>> | 94% | 56,724 psi | 89% | 3117 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,360 psi | 85% | 3071 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,753 psi | 89% | 3091 fps | 96.3% |
| Lovex S060 | <<locked>> | 82% | 56,318 psi | 88% | 3018 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,897 psi | 86% | 3022 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,694 psi | 86% | 3041 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 55,970 psi | 88% | 3084 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,759 psi | 70% | 2897 fps | 97.9% |
| Norma 201 | <<locked>> | 82% | 56,144 psi | 88% | 3035 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,116 psi | 90% | 3035 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,709 psi | 87% | 3081 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,926 psi | 86% | 3100 fps | 97.4% |
| Norma MRP | <<locked>> | 98% | 53,751 psi | 84% | 3182 fps | 98.8% |
| Norma URP | <<locked>> | 92% | 54,897 psi | 86% | 3104 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 56,811 psi | 89% | 3110 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,026 psi | 83% | 3143 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 94% | 57,609 psi | 90% | 3166 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,253 psi | 74% | 3005 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,912 psi | 58% | 1985 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,609 psi | 90% | 3094 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,580 psi | 90% | 3166 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,215 psi | 85% | 3146 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,376 psi | 88% | 3150 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,940 psi | 86% | 3179 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,410 psi | 68% | 3009 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 84% | 56,797 psi | 89% | 3038 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,174 psi | 90% | 3084 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,434 psi | 87% | 3077 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 98% | 56,057 psi | 88% | 3140 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 56,579 psi | 89% | 3074 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,694 psi | 86% | 3041 fps | 99.5% |
| Shooters World Precision | <<locked>> | 84% | 54,897 psi | 86% | 3022 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,970 psi | 88% | 3084 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,230 psi | 87% | 3091 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,101 psi | 88% | 3064 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,029 psi | 89% | 2966 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,679 psi | 86% | 2917 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,476 psi | 85% | 2992 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,564 psi | 87% | 3133 fps | 97.9% |
| Somchem S335 | <<locked>> | 82% | 56,710 psi | 89% | 2959 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,043 psi | 89% | 3081 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 57,522 psi | 90% | 3071 fps | 96.2% |
| Somchem S365 | <<locked>> | 94% | 54,404 psi | 85% | 3110 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,681 psi | 89% | 3117 fps | 98.7% |
| Vihtavuori N133 | <<locked>> | 82% | 57,595 psi | 90% | 2946 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,435 psi | 90% | 2995 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,638 psi | 90% | 3009 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,940 psi | 86% | 3002 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 57,276 psi | 90% | 3104 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,301 psi | 82% | 3025 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 84% | 55,898 psi | 88% | 3005 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,231 psi | 88% | 3104 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,956 psi | 89% | 3166 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 57,145 psi | 90% | 3071 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,984 psi | 86% | 3120 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,137 psi | 72% | 3140 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,434 psi | 88% | 3074 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,116 psi | 90% | 3110 fps | 98% |
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% | 50,836 psi | 80% | 2904 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,197 psi | 77% | 2907 fps | 97.2% |
| Accurate 3100 | <<locked>> | 88% | 35,462 psi | 56% | 2694 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 48,225 psi | 76% | 2904 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,680 psi | 57% | 2743 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 80% | 45,934 psi | 72% | 2881 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 46,963 psi | 74% | 2976 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 98% | 51,648 psi | 81% | 3094 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,039 psi | 80% | 3110 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,238 psi | 72% | 2904 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,516 psi | 78% | 2979 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,013 psi | 56% | 2759 fps | 97.4% |
| Alliant Reloder-17 | 68.8 gr | 80% | 40,930 psi | 64% | 2897 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 46,659 psi | 73% | 2969 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,888 psi | 69% | 2953 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,920 psi | 44% | 2539 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 94% | 36,318 psi | 57% | 2799 fps | 96% |
| Alliant Reloder-26 | 74.1 gr | 84% | 32,358 psi | 51% | 2726 fps | 95% |
| Bofors RP15 | <<locked>> | 98% | 46,224 psi | 72% | 3002 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 46,499 psi | 73% | 2913 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,888 psi | 69% | 2953 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 40,930 psi | 64% | 2772 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 46,934 psi | 74% | 2923 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 38,899 psi | 61% | 2799 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 82% | 44,860 psi | 70% | 2894 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,475 psi | 52% | 2648 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,474 psi | 81% | 3028 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 40,959 psi | 64% | 2874 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,992 psi | 42% | 1732 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,344 psi | 82% | 2999 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,312 psi | 76% | 2920 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,705 psi | 79% | 2949 fps | 98.2% |
| IMR 4350 | <<locked>> | 84% | 41,814 psi | 66% | 2808 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,453 psi | 67% | 2808 fps | 96.2% |
| IMR 4831 | <<locked>> | 80% | 35,404 psi | 55% | 2697 fps | 96.9% |
| IMR 4895 | <<locked>> | 80% | 50,792 psi | 80% | 3009 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,330 psi | 84% | 3031 fps | 95.5% |
| Lovex S060 | <<locked>> | 80% | 52,895 psi | 83% | 2963 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,341 psi | 76% | 2913 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,871 psi | 62% | 2753 fps | 96.9% |
| Lovex S070 | <<locked>> | 80% | 38,043 psi | 60% | 2726 fps | 95.1% |
| Lovex S071 | <<locked>> | 94% | 36,564 psi | 57% | 2717 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 52,707 psi | 83% | 2982 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,374 psi | 84% | 2979 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,849 psi | 77% | 2966 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 47,747 psi | 75% | 2972 fps | 95.8% |
| Norma MRP | <<locked>> | 90% | 40,219 psi | 63% | 2904 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 36,709 psi | 58% | 2743 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 80% | 49,429 psi | 77% | 2989 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 49,197 psi | 77% | 3071 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 82% | 38,145 psi | 60% | 2785 fps | 95.9% |
| Ramshot Magnum | <<locked>> | 98% | 43,671 psi | 68% | 2930 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,398 psi | 43% | 1775 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,181 psi | 74% | 2910 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,882 psi | 84% | 3110 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,569 psi | 68% | 2959 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,709 psi | 58% | 2762 fps | 96.9% |
| ReloadSwiss RS 70 | 69.9 gr | 80% | 35,708 psi | 56% | 2766 fps | 96.1% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,277 psi | 63% | 2933 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 50,212 psi | 79% | 2933 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,729 psi | 69% | 2854 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 92% | 48,704 psi | 76% | 2956 fps | 95% |
| Rottweil R 905 | <<locked>> | 92% | 45,629 psi | 72% | 2949 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 40,930 psi | 64% | 2772 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,871 psi | 62% | 2753 fps | 96.9% |
| Shooters World Precision | <<locked>> | 80% | 48,341 psi | 76% | 2913 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,043 psi | 60% | 2726 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,223 psi | 71% | 2917 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,707 psi | 83% | 3009 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,461 psi | 84% | 2913 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,136 psi | 71% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,088 psi | 61% | 2694 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,223 psi | 71% | 2943 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 53,316 psi | 84% | 2910 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,135 psi | 69% | 2858 fps | 99.8% |
| Somchem S361 | <<locked>> | 94% | 53,606 psi | 84% | 3005 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 33,170 psi | 52% | 2694 fps | 99% |
| Somchem S385 | <<locked>> | 88% | 40,451 psi | 63% | 2805 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 54,085 psi | 85% | 2897 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,357 psi | 79% | 2894 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,778 psi | 80% | 2907 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,163 psi | 66% | 2782 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,101 psi | 60% | 2746 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 94% | 42,641 psi | 67% | 2841 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 48,979 psi | 77% | 2897 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,521 psi | 59% | 2743 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 82% | 30,748 psi | 48% | 2621 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,405 psi | 59% | 2717 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 39,059 psi | 61% | 2802 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 28,123 psi | 44% | 2635 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,765 psi | 83% | 3015 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,093 psi | 72% | 2917 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 103 powders for .300 Weath. Mag. loaded with the .308 | 156gr | Reichenberg HDB Ogival. Alliant Reloder-26 delivers the highest muzzle velocity at 3,228 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,228 fps. Accurate 3100 gives the best case fill at 100 %, and 103 of the 103 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.308" calls for a 1:12.5 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 70, Alliant Reloder-26, Alliant Reloder-17 rank at the top here: for .300 Weath. Mag. with the .308 | 156gr | Reichenberg HDB Ogival they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2225, Baschieri & Pellagri 109, Bofors RP30 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.