Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 150gr | Norma Semi Soft Point bullet and 85 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Alliant Reloder-16.
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.
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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% | 57,392 psi | 90% | 3051 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,737 psi | 86% | 3064 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,348 psi | 90% | 3166 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 57,667 psi | 90% | 3107 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,361 psi | 87% | 3163 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 57,551 psi | 90% | 3140 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,231 psi | 88% | 3205 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 98% | 53,998 psi | 85% | 3192 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,348 psi | 90% | 3271 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,926 psi | 86% | 3110 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,143 psi | 86% | 3133 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,883 psi | 88% | 3225 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,566 psi | 90% | 3248 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,550 psi | 87% | 3189 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,898 psi | 89% | 3255 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,809 psi | 84% | 3182 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,673 psi | 73% | 3097 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,041 psi | 85% | 3264 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,272 psi | 82% | 3169 fps | 97.1% |
| Bofors RP3 | <<locked>> | 84% | 55,970 psi | 88% | 3127 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,898 psi | 89% | 3255 fps | 98.1% |
| Bofors RP7 | <<locked>> | 88% | 55,288 psi | 87% | 3110 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 84% | 56,246 psi | 88% | 3143 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 57,406 psi | 90% | 3219 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 56,855 psi | 89% | 3176 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,724 psi | 89% | 3179 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,391 psi | 88% | 3143 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,464 psi | 90% | 3182 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 53,940 psi | 85% | 3186 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,477 psi | 57% | 1998 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,942 psi | 89% | 3123 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,970 psi | 88% | 3104 fps | 98.9% |
| IMR 4350 | <<locked>> | 92% | 56,449 psi | 88% | 3143 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,652 psi | 89% | 3136 fps | 98.9% |
| IMR 4831 | <<locked>> | 92% | 55,753 psi | 87% | 3153 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,565 psi | 89% | 3163 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,564 psi | 87% | 3127 fps | 95.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,230 psi | 87% | 3228 fps | 96.4% |
| Lovex S062 | <<locked>> | 84% | 57,130 psi | 90% | 3114 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,072 psi | 89% | 3136 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 54,926 psi | 86% | 3120 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,485 psi | 74% | 2999 fps | 98.3% |
| Norma 203B | <<locked>> | 82% | 54,447 psi | 85% | 3117 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,421 psi | 90% | 3199 fps | 97.8% |
| Norma MRP | <<locked>> | 98% | 56,695 psi | 89% | 3281 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 57,435 psi | 90% | 3202 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,317 psi | 87% | 3143 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3248 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 92% | 56,463 psi | 88% | 3202 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,053 psi | 78% | 3107 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,231 psi | 58% | 2044 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,014 psi | 88% | 3123 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,927 psi | 89% | 3241 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,259 psi | 87% | 3186 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,667 psi | 90% | 3278 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,919 psi | 72% | 3117 fps | 97.4% |
| Rottweil R 902 | <<locked>> | 82% | 55,738 psi | 87% | 3077 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,999 psi | 88% | 3123 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,259 psi | 85% | 3114 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 96% | 54,868 psi | 86% | 3176 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 88% | 55,288 psi | 87% | 3110 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,072 psi | 89% | 3136 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 57,130 psi | 90% | 3114 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,926 psi | 86% | 3120 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,609 psi | 90% | 3182 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,666 psi | 89% | 3005 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,623 psi | 89% | 3084 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,404 psi | 85% | 3169 fps | 97.6% |
| Somchem S355 | <<locked>> | 86% | 55,825 psi | 87% | 3117 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,101 psi | 88% | 3104 fps | 95.8% |
| Somchem S365 | <<locked>> | 94% | 57,290 psi | 90% | 3209 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,521 psi | 87% | 3150 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 82% | 56,144 psi | 88% | 3035 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,217 psi | 88% | 3048 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,188 psi | 90% | 3091 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,014 psi | 88% | 3143 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,042 psi | 86% | 3123 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 82% | 54,491 psi | 85% | 3041 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,216 psi | 87% | 3146 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 56,304 psi | 88% | 3212 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,768 psi | 89% | 3268 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,782 psi | 87% | 3104 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,609 psi | 90% | 3219 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,603 psi | 78% | 3248 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,825 psi | 87% | 3143 fps | 97.6% |
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% | 53,751 psi | 84% | 2999 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,198 psi | 80% | 2999 fps | 97.5% |
| Accurate 3100 | <<locked>> | 88% | 38,000 psi | 60% | 2795 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 50,923 psi | 80% | 3002 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,131 psi | 61% | 2848 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 80% | 47,630 psi | 75% | 2969 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 46,166 psi | 72% | 3012 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 96% | 50,328 psi | 79% | 3123 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,417 psi | 84% | 3205 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,327 psi | 76% | 2995 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,706 psi | 81% | 3074 fps | 99.9% |
| Alliant Reloder-16 | 67.1 gr | 80% | 37,884 psi | 59% | 2854 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,105 psi | 68% | 2992 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 45,803 psi | 72% | 3002 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 46,412 psi | 73% | 3054 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,876 psi | 44% | 2579 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 92% | 36,042 psi | 56% | 2835 fps | 95.7% |
| Alliant Reloder-26 | 77.7 gr | 84% | 34,505 psi | 54% | 2831 fps | 95.8% |
| Bofors RP15 | <<locked>> | 96% | 45,571 psi | 71% | 3038 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 48,936 psi | 77% | 3009 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 46,412 psi | 73% | 3054 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 42,859 psi | 67% | 2864 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 49,284 psi | 77% | 3022 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 41,031 psi | 64% | 2897 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 80% | 43,772 psi | 69% | 2920 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,852 psi | 83% | 3114 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,375 psi | 55% | 2740 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,722 psi | 84% | 3123 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 43,134 psi | 68% | 2972 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,253 psi | 43% | 1788 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,111 psi | 79% | 3009 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,359 psi | 82% | 3038 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 41,046 psi | 64% | 2844 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,164 psi | 69% | 2897 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 37,463 psi | 59% | 2792 fps | 97.4% |
| IMR 4895 | <<locked>> | 80% | 53,069 psi | 83% | 3104 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,185 psi | 82% | 3064 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 98% | 51,445 psi | 81% | 3156 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 50,531 psi | 79% | 3009 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,829 psi | 66% | 2848 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 40,016 psi | 63% | 2822 fps | 95.6% |
| Lovex S071 | <<locked>> | 92% | 36,651 psi | 57% | 2762 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 51,082 psi | 80% | 3058 fps | 100% |
| Norma 204 | <<locked>> | 86% | 46,673 psi | 73% | 2999 fps | 95.4% |
| Norma MRP | 79 gr | 88% | 39,697 psi | 62% | 2936 fps | 95% |
| Norma URP | <<locked>> | 80% | 38,696 psi | 61% | 2838 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 80% | 51,721 psi | 81% | 3084 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 51,808 psi | 81% | 3176 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 37,594 psi | 59% | 2818 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 96% | 43,018 psi | 67% | 2966 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,847 psi | 44% | 1831 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,081 psi | 77% | 3002 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,788 psi | 72% | 3054 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,972 psi | 61% | 2864 fps | 97.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,695 psi | 59% | 2867 fps | 96.7% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 42,801 psi | 67% | 3041 fps | 96.3% |
| Rottweil R 902 | <<locked>> | 80% | 52,286 psi | 82% | 3022 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,992 psi | 72% | 2953 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 50,879 psi | 80% | 3051 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 90% | 44,933 psi | 70% | 2982 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 42,859 psi | 67% | 2864 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,829 psi | 66% | 2848 fps | 97.3% |
| Shooters World Precision | <<locked>> | 80% | 50,531 psi | 79% | 3009 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,016 psi | 63% | 2822 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,224 psi | 74% | 3005 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,007 psi | 74% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,901 psi | 64% | 2782 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 44,527 psi | 70% | 2979 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 46,282 psi | 73% | 2949 fps | 99.9% |
| Somchem S361 | <<locked>> | 92% | 52,533 psi | 82% | 3045 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 35,244 psi | 55% | 2792 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 42,699 psi | 67% | 2904 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 52,576 psi | 82% | 2986 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,750 psi | 83% | 2995 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,179 psi | 69% | 2874 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,190 psi | 63% | 2841 fps | 98% |
| Vihtavuori N165 | <<locked>> | 94% | 44,976 psi | 70% | 2940 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 51,184 psi | 80% | 2989 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,668 psi | 62% | 2838 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 30,806 psi | 48% | 2661 fps | 95.3% |
| Vihtavuori N560 | <<locked>> | 96% | 52,939 psi | 83% | 3199 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,291 psi | 62% | 2805 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 41,031 psi | 64% | 2897 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 84% | 28,210 psi | 44% | 2674 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 92% | 45,150 psi | 71% | 2949 fps | 95.1% |
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 94 powders for .300 Weath. Mag. loaded with the .308 | 150gr | Norma Semi Soft Point. Norma MRP delivers the highest muzzle velocity at 3,281 fps; across all powders the maximum-charge window runs from 1,998 fps to 3,281 fps. Accurate 3100 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2217, ADI AR 2225 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-26, Norma MRP, Alliant Reloder-16 rank at the top here: for .300 Weath. Mag. with the .308 | 150gr | Norma Semi Soft Point they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 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.