Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 150gr | Sellier & Bellot SPCE bullet and 84 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% | 56,652 psi | 89% | 3038 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,186 psi | 85% | 3051 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,637 psi | 89% | 3156 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 57,188 psi | 90% | 3097 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,723 psi | 86% | 3153 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 57,000 psi | 89% | 3130 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,753 psi | 87% | 3196 fps | 97.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,290 psi | 90% | 3251 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,666 psi | 89% | 3258 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,505 psi | 85% | 3100 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,694 psi | 86% | 3123 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,477 psi | 87% | 3215 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,956 psi | 89% | 3241 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,071 psi | 86% | 3176 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,434 psi | 88% | 3245 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,272 psi | 83% | 3173 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,282 psi | 73% | 3084 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 57,711 psi | 90% | 3323 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,561 psi | 81% | 3153 fps | 96.8% |
| Bofors RP3 | <<locked>> | 84% | 55,521 psi | 87% | 3120 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,434 psi | 88% | 3245 fps | 98% |
| Bofors RP7 | <<locked>> | 88% | 54,708 psi | 86% | 3094 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 84% | 55,666 psi | 87% | 3133 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 56,855 psi | 89% | 3205 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 56,304 psi | 88% | 3163 fps | 98% |
| Hodgdon H4831 | <<locked>> | 98% | 57,392 psi | 90% | 3189 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,796 psi | 87% | 3133 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,058 psi | 89% | 3173 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 57,334 psi | 90% | 3241 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,535 psi | 57% | 1995 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,348 psi | 90% | 3136 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,550 psi | 89% | 3114 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,593 psi | 87% | 3094 fps | 98.8% |
| IMR 4350 | <<locked>> | 92% | 55,941 psi | 88% | 3133 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,347 psi | 88% | 3127 fps | 98.8% |
| IMR 4831 | <<locked>> | 92% | 55,172 psi | 86% | 3143 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,130 psi | 88% | 3153 fps | 100% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,520 psi | 85% | 3212 fps | 96.2% |
| Lovex S062 | <<locked>> | 84% | 56,681 psi | 89% | 3107 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,507 psi | 89% | 3123 fps | 99.6% |
| Lovex S070 | <<locked>> | 90% | 54,607 psi | 86% | 3114 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,007 psi | 74% | 2989 fps | 98.2% |
| Norma 203B | <<locked>> | 84% | 57,595 psi | 90% | 3166 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,927 psi | 89% | 3189 fps | 97.7% |
| Norma MRP | <<locked>> | 98% | 56,144 psi | 88% | 3271 fps | 99% |
| Norma URP | <<locked>> | 92% | 56,855 psi | 89% | 3189 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,708 psi | 86% | 3130 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,143 psi | 86% | 3235 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 92% | 55,927 psi | 88% | 3192 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,458 psi | 78% | 3094 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,130 psi | 58% | 2037 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,666 psi | 87% | 3117 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,260 psi | 88% | 3232 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,708 psi | 86% | 3173 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,927 psi | 89% | 3261 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,382 psi | 71% | 3104 fps | 97.1% |
| Rottweil R 902 | <<locked>> | 82% | 55,317 psi | 87% | 3068 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,579 psi | 87% | 3114 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,421 psi | 90% | 3166 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 96% | 54,360 psi | 85% | 3166 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 88% | 54,708 psi | 86% | 3094 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,507 psi | 89% | 3123 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 56,681 psi | 89% | 3107 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,607 psi | 86% | 3114 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,246 psi | 90% | 3176 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,246 psi | 88% | 2995 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,304 psi | 88% | 3074 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,667 psi | 90% | 3222 fps | 98.1% |
| Somchem S355 | <<locked>> | 86% | 55,448 psi | 87% | 3107 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 56,681 psi | 89% | 3196 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,071 psi | 86% | 3140 fps | 98.3% |
| Vihtavuori N135 | <<locked>> | 82% | 55,680 psi | 87% | 3028 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,825 psi | 87% | 3038 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,826 psi | 89% | 3084 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,434 psi | 87% | 3130 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,331 psi | 85% | 3110 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 84% | 57,580 psi | 90% | 3084 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,694 psi | 86% | 3136 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 98% | 55,738 psi | 87% | 3199 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,318 psi | 88% | 3258 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,071 psi | 86% | 3091 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,058 psi | 89% | 3209 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,718 psi | 76% | 3232 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,143 psi | 86% | 3130 fps | 97.5% |
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 2495 | <<locked>> | 80% | 53,258 psi | 83% | 2989 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,691 psi | 79% | 2986 fps | 97.4% |
| Accurate 3100 | <<locked>> | 88% | 37,536 psi | 59% | 2782 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 50,459 psi | 79% | 2995 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,740 psi | 61% | 2838 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 80% | 47,427 psi | 74% | 2963 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 45,672 psi | 72% | 2999 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 98% | 53,330 psi | 84% | 3179 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,765 psi | 83% | 3192 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,906 psi | 75% | 2986 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,300 psi | 80% | 3064 fps | 99.9% |
| Alliant Reloder-16 | 66.5 gr | 80% | 37,507 psi | 59% | 2844 fps | 97.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,728 psi | 67% | 2982 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 45,295 psi | 71% | 2992 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 45,948 psi | 72% | 3045 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 82% | 29,370 psi | 46% | 2625 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 92% | 35,708 psi | 56% | 2825 fps | 95.4% |
| Alliant Reloder-26 | 77 gr | 84% | 34,055 psi | 53% | 2818 fps | 95.6% |
| Bofors RP15 | <<locked>> | 96% | 45,121 psi | 71% | 3025 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 48,472 psi | 76% | 3002 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 45,948 psi | 72% | 3045 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 42,496 psi | 67% | 2854 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 48,718 psi | 76% | 3009 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 40,509 psi | 63% | 2881 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 82% | 46,311 psi | 73% | 2972 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 96% | 53,447 psi | 84% | 3120 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,983 psi | 55% | 2730 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,287 psi | 84% | 3114 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 42,670 psi | 67% | 2959 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,238 psi | 43% | 1781 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,795 psi | 84% | 3077 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,893 psi | 78% | 3002 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,011 psi | 82% | 3028 fps | 98.3% |
| IMR 4350 | <<locked>> | 84% | 43,395 psi | 68% | 2890 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,816 psi | 69% | 2887 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 37,101 psi | 58% | 2782 fps | 97.3% |
| IMR 4895 | <<locked>> | 80% | 52,649 psi | 83% | 3097 fps | 100% |
| IMR 7828 SSC | <<locked>> | 98% | 51,010 psi | 80% | 3146 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 50,111 psi | 79% | 2995 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,466 psi | 65% | 2835 fps | 97.2% |
| Lovex S070 | <<locked>> | 80% | 39,668 psi | 62% | 2808 fps | 95.4% |
| Lovex S071 | <<locked>> | 92% | 36,158 psi | 57% | 2749 fps | 95% |
| Norma 203B | <<locked>> | 80% | 50,676 psi | 79% | 3051 fps | 100% |
| Norma 204 | <<locked>> | 86% | 46,340 psi | 73% | 2989 fps | 95.2% |
| Norma MRP | 80.1 gr | 90% | 42,134 psi | 66% | 2992 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 38,305 psi | 60% | 2828 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 80% | 51,140 psi | 80% | 3068 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 51,198 psi | 80% | 3159 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 37,246 psi | 58% | 2808 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 96% | 42,612 psi | 67% | 2949 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,673 psi | 43% | 1824 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,733 psi | 76% | 2989 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,353 psi | 71% | 3045 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,406 psi | 60% | 2848 fps | 97.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,246 psi | 58% | 2854 fps | 96.5% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 42,293 psi | 66% | 3025 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 51,880 psi | 81% | 3012 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,585 psi | 71% | 2940 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 50,444 psi | 79% | 3041 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 90% | 44,425 psi | 70% | 2969 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 42,496 psi | 67% | 2854 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,466 psi | 65% | 2835 fps | 97.2% |
| Shooters World Precision | <<locked>> | 80% | 50,111 psi | 79% | 2995 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,668 psi | 62% | 2808 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,862 psi | 73% | 2999 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,775 psi | 73% | 2848 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,567 psi | 64% | 2772 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 47,079 psi | 74% | 3028 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 45,876 psi | 72% | 2940 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 34,853 psi | 55% | 2782 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 42,250 psi | 66% | 2890 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 52,286 psi | 82% | 2976 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,330 psi | 82% | 2986 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,787 psi | 69% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,813 psi | 62% | 2831 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 44,483 psi | 70% | 2927 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 50,633 psi | 79% | 2976 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,175 psi | 61% | 2828 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 30,429 psi | 48% | 2648 fps | 95.1% |
| Vihtavuori N560 | <<locked>> | 96% | 52,489 psi | 82% | 3189 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,015 psi | 61% | 2799 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 40,683 psi | 64% | 2887 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 27,862 psi | 44% | 2657 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 94% | 47,863 psi | 75% | 2999 fps | 95.8% |
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 84 powders for .300 Weath. Mag. loaded with the .308 | 150gr | Sellier & Bellot SPCE. Alliant Reloder-26 delivers the highest muzzle velocity at 3,323 fps; across all powders the maximum-charge window runs from 1,995 fps to 3,323 fps. Accurate 3100 gives the best case fill at 100 %, and 84 of the 84 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 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, 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-26, Norma MRP, Alliant Reloder-16 rank at the top here: for .300 Weath. Mag. with the .308 | 150gr | Sellier & Bellot SPCE 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.