Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 150gr | Frontier PH HPBT bullet and 86 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.
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% | 55,999 psi | 88% | 3028 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,261 psi | 90% | 3097 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,767 psi | 87% | 3140 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 56,579 psi | 89% | 3087 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 53,954 psi | 85% | 3136 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 56,478 psi | 89% | 3120 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,940 psi | 86% | 3179 fps | 97.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,333 psi | 88% | 3232 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,101 psi | 88% | 3251 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,305 psi | 90% | 3146 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,537 psi | 90% | 3166 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,723 psi | 86% | 3202 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,941 psi | 88% | 3225 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,418 psi | 85% | 3166 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,390 psi | 87% | 3225 fps | 97.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,359 psi | 82% | 3159 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,571 psi | 71% | 3068 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,521 psi | 89% | 3307 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,749 psi | 80% | 3140 fps | 96.6% |
| Bofors RP3 | <<locked>> | 84% | 54,766 psi | 86% | 3107 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,390 psi | 87% | 3225 fps | 97.7% |
| Bofors RP7 | <<locked>> | 90% | 57,696 psi | 90% | 3146 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 84% | 55,143 psi | 86% | 3123 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 56,115 psi | 88% | 3192 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 88% | 55,637 psi | 87% | 3150 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,071 psi | 86% | 3123 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,275 psi | 88% | 3163 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 56,536 psi | 89% | 3228 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,390 psi | 57% | 1988 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,782 psi | 89% | 3123 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,970 psi | 88% | 3104 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,897 psi | 86% | 3077 fps | 98.7% |
| IMR 4350 | <<locked>> | 92% | 55,332 psi | 87% | 3123 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,695 psi | 87% | 3117 fps | 98.7% |
| IMR 4831 | <<locked>> | 92% | 54,491 psi | 85% | 3133 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 55,347 psi | 87% | 3140 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 57,319 psi | 90% | 3087 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 56,130 psi | 88% | 3097 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,840 psi | 88% | 3110 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 57,246 psi | 90% | 3156 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,180 psi | 72% | 2972 fps | 98% |
| Norma 201 | <<locked>> | 82% | 57,290 psi | 90% | 3107 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,826 psi | 89% | 3153 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,101 psi | 88% | 3173 fps | 97.4% |
| Norma MRP | <<locked>> | 98% | 55,071 psi | 86% | 3255 fps | 98.8% |
| Norma URP | <<locked>> | 92% | 56,144 psi | 88% | 3179 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 54,215 psi | 85% | 3123 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,375 psi | 85% | 3219 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 92% | 55,056 psi | 86% | 3176 fps | 99.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,544 psi | 76% | 3077 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,144 psi | 58% | 2034 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,027 psi | 86% | 3104 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,463 psi | 87% | 3222 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 57,740 psi | 90% | 3222 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,057 psi | 88% | 3248 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,628 psi | 70% | 3084 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 82% | 54,723 psi | 86% | 3058 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,795 psi | 86% | 3100 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,623 psi | 89% | 3150 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 98% | 57,246 psi | 90% | 3212 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 57,696 psi | 90% | 3146 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,840 psi | 88% | 3110 fps | 99.5% |
| Shooters World Precision | <<locked>> | 84% | 56,130 psi | 88% | 3097 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,246 psi | 90% | 3156 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,521 psi | 89% | 3166 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,261 psi | 90% | 3140 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,709 psi | 87% | 2989 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,709 psi | 87% | 3064 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,768 psi | 89% | 3205 fps | 97.9% |
| Somchem S335 | <<locked>> | 82% | 57,725 psi | 90% | 3028 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 54,665 psi | 86% | 3097 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 55,651 psi | 87% | 3182 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,215 psi | 85% | 3123 fps | 98.2% |
| Vihtavuori N135 | <<locked>> | 82% | 54,998 psi | 86% | 3015 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,230 psi | 87% | 3031 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,144 psi | 88% | 3071 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,723 psi | 86% | 3120 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,548 psi | 84% | 3094 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 84% | 57,101 psi | 89% | 3077 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 57,638 psi | 90% | 3182 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,781 psi | 86% | 3186 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,433 psi | 85% | 3084 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,333 psi | 88% | 3199 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,776 psi | 75% | 3219 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,551 psi | 90% | 3146 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,346 psi | 85% | 3117 fps | 97.3% |
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% | 52,605 psi | 82% | 2979 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,198 psi | 79% | 2976 fps | 97.2% |
| Accurate 3100 | <<locked>> | 88% | 36,898 psi | 58% | 2769 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 49,850 psi | 78% | 2982 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,189 psi | 60% | 2822 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 80% | 46,862 psi | 73% | 2949 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 48,211 psi | 76% | 3051 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 98% | 52,649 psi | 83% | 3163 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,199 psi | 82% | 3182 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,514 psi | 74% | 2979 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,734 psi | 80% | 3051 fps | 99.9% |
| Alliant Reloder-16 | 65.7 gr | 80% | 36,999 psi | 58% | 2831 fps | 97.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,177 psi | 66% | 2969 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 47,732 psi | 75% | 3041 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 45,179 psi | 71% | 3028 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,964 psi | 45% | 2612 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 92% | 35,186 psi | 55% | 2808 fps | 95.1% |
| Alliant Reloder-26 | 76.1 gr | 84% | 33,518 psi | 53% | 2802 fps | 95.2% |
| Bofors RP15 | <<locked>> | 98% | 47,456 psi | 74% | 3074 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 47,906 psi | 75% | 2989 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 45,179 psi | 71% | 3028 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 42,003 psi | 66% | 2841 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 48,167 psi | 75% | 2995 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 40,030 psi | 63% | 2871 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 82% | 45,847 psi | 72% | 2963 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,606 psi | 54% | 2720 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,707 psi | 83% | 3104 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 42,105 psi | 66% | 2946 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,137 psi | 43% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,229 psi | 83% | 3068 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,298 psi | 77% | 2989 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,517 psi | 81% | 3018 fps | 98.1% |
| IMR 4350 | <<locked>> | 84% | 42,801 psi | 67% | 2877 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,497 psi | 68% | 2877 fps | 96.2% |
| IMR 4831 | <<locked>> | 80% | 36,579 psi | 57% | 2769 fps | 97.1% |
| IMR 4895 | <<locked>> | 80% | 52,054 psi | 82% | 3087 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 53,824 psi | 84% | 3031 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,501 psi | 78% | 2986 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,988 psi | 64% | 2825 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 39,175 psi | 61% | 2799 fps | 95.2% |
| Lovex S071 | <<locked>> | 94% | 38,145 psi | 60% | 2799 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 53,925 psi | 85% | 3054 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,096 psi | 79% | 3038 fps | 100% |
| Norma 204 | <<locked>> | 88% | 48,863 psi | 77% | 3041 fps | 95.8% |
| Norma MRP | 79.2 gr | 90% | 41,553 psi | 65% | 2979 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 37,797 psi | 59% | 2815 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 80% | 50,618 psi | 79% | 3061 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 50,459 psi | 79% | 3143 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 36,811 psi | 58% | 2799 fps | 95% |
| Ramshot Magnum | <<locked>> | 98% | 45,020 psi | 71% | 3002 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,731 psi | 43% | 1821 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,269 psi | 76% | 2979 fps | 98% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,802 psi | 70% | 3035 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,913 psi | 59% | 2838 fps | 97% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,825 psi | 58% | 2841 fps | 96.2% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 41,539 psi | 65% | 3005 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 51,256 psi | 80% | 3002 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,049 psi | 71% | 2927 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 92% | 49,777 psi | 78% | 3028 fps | 95% |
| Rottweil R 905 | <<locked>> | 92% | 46,862 psi | 73% | 3022 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 42,003 psi | 66% | 2841 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,988 psi | 64% | 2825 fps | 97% |
| Shooters World Precision | <<locked>> | 80% | 49,501 psi | 78% | 2986 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,175 psi | 61% | 2799 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,325 psi | 73% | 2986 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,751 psi | 84% | 3081 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,195 psi | 72% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,132 psi | 63% | 2762 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 46,441 psi | 73% | 3015 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 54,418 psi | 85% | 2982 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,324 psi | 71% | 2930 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 34,316 psi | 54% | 2769 fps | 99.1% |
| Somchem S385 | <<locked>> | 88% | 41,640 psi | 65% | 2877 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 51,634 psi | 81% | 2966 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,808 psi | 81% | 2979 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,250 psi | 68% | 2854 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,291 psi | 62% | 2818 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 94% | 43,918 psi | 69% | 2913 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 50,096 psi | 79% | 2969 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,711 psi | 61% | 2815 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 32,140 psi | 50% | 2700 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,464 psi | 60% | 2785 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 40,161 psi | 63% | 2874 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 27,412 psi | 43% | 2641 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,809 psi | 84% | 3087 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 47,282 psi | 74% | 2989 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 99 powders for .300 Weath. Mag. loaded with the .308 | 150gr | Frontier PH HPBT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,307 fps; across all powders the maximum-charge window runs from 1,988 fps to 3,307 fps. Accurate 3100 gives the best case fill at 100 %, and 99 of the 99 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 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, 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 | Frontier PH HPBT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, 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.