Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 150gr | Berger Target FB bullet and 90 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% | 55,463 psi | 87% | 3018 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,681 psi | 89% | 3084 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,969 psi | 86% | 3123 fps | 99.3% |
| Accurate 4064 | <<locked>> | 84% | 56,072 psi | 88% | 3077 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,145 psi | 90% | 3186 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,825 psi | 87% | 3107 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,389 psi | 85% | 3166 fps | 97.2% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,637 psi | 87% | 3212 fps | 96.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,376 psi | 87% | 3235 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 54,433 psi | 85% | 3159 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,869 psi | 89% | 3133 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,043 psi | 89% | 3156 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,624 psi | 90% | 3245 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,288 psi | 87% | 3212 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,348 psi | 90% | 3212 fps | 97.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,621 psi | 86% | 3209 fps | 97.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,547 psi | 81% | 3143 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,933 psi | 70% | 3051 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,695 psi | 87% | 3291 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,995 psi | 78% | 3120 fps | 96.3% |
| Bofors RP3 | <<locked>> | 84% | 54,056 psi | 85% | 3091 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,621 psi | 86% | 3209 fps | 97.5% |
| Bofors RP7 | <<locked>> | 90% | 57,087 psi | 89% | 3130 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 84% | 54,462 psi | 85% | 3107 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 90% | 55,317 psi | 87% | 3176 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 88% | 55,056 psi | 86% | 3133 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,433 psi | 85% | 3110 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,825 psi | 87% | 3150 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 55,970 psi | 88% | 3215 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,347 psi | 57% | 1982 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,333 psi | 88% | 3114 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,317 psi | 87% | 3091 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,520 psi | 85% | 3068 fps | 98.6% |
| IMR 4350 | <<locked>> | 92% | 54,534 psi | 85% | 3104 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,100 psi | 86% | 3100 fps | 98.6% |
| IMR 4831 | <<locked>> | 94% | 57,348 psi | 90% | 3173 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,824 psi | 86% | 3127 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,305 psi | 90% | 3146 fps | 96.1% |
| Lovex S060 | <<locked>> | 82% | 56,869 psi | 89% | 3077 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,651 psi | 87% | 3084 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,448 psi | 87% | 3100 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 56,681 psi | 89% | 3143 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,600 psi | 71% | 2956 fps | 97.8% |
| Norma 201 | <<locked>> | 82% | 56,811 psi | 89% | 3097 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,609 psi | 90% | 3094 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,333 psi | 88% | 3143 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,521 psi | 87% | 3159 fps | 97.3% |
| Norma MRP | <<locked>> | 98% | 54,302 psi | 85% | 3238 fps | 98.6% |
| Norma URP | <<locked>> | 92% | 55,521 psi | 87% | 3166 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 57,406 psi | 90% | 3169 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,432 psi | 84% | 3196 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 92% | 54,491 psi | 85% | 3166 fps | 99.2% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,935 psi | 75% | 3058 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,115 psi | 58% | 2031 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,418 psi | 85% | 3087 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,766 psi | 86% | 3205 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,927 psi | 89% | 3205 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,506 psi | 87% | 3235 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,121 psi | 69% | 3068 fps | 96.5% |
| Rottweil R 902 | <<locked>> | 84% | 57,638 psi | 90% | 3100 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,331 psi | 85% | 3091 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,057 psi | 88% | 3136 fps | 96.4% |
| Rottweil R 905 | <<locked>> | 98% | 56,449 psi | 88% | 3196 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 90% | 57,087 psi | 89% | 3130 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,448 psi | 87% | 3100 fps | 99.5% |
| Shooters World Precision | <<locked>> | 84% | 55,651 psi | 87% | 3084 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,681 psi | 89% | 3143 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,869 psi | 88% | 3150 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,594 psi | 89% | 3123 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,551 psi | 90% | 3025 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,245 psi | 87% | 2979 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,158 psi | 86% | 3048 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,956 psi | 88% | 3189 fps | 97.7% |
| Somchem S335 | <<locked>> | 82% | 57,217 psi | 90% | 3018 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,682 psi | 90% | 3140 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 54,998 psi | 86% | 3173 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,392 psi | 90% | 3173 fps | 98.6% |
| Vihtavuori N135 | <<locked>> | 82% | 54,418 psi | 85% | 3005 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,781 psi | 86% | 3022 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,492 psi | 87% | 3058 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,114 psi | 85% | 3107 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,866 psi | 83% | 3081 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 84% | 56,478 psi | 89% | 3064 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,811 psi | 89% | 3163 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 54,186 psi | 85% | 3173 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 57,653 psi | 90% | 3127 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,535 psi | 87% | 3179 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,891 psi | 73% | 3202 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,913 psi | 89% | 3133 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,595 psi | 90% | 3166 fps | 97.7% |
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% | 52,040 psi | 82% | 2966 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,617 psi | 78% | 2959 fps | 97% |
| Accurate 3100 | <<locked>> | 88% | 36,376 psi | 57% | 2753 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 49,313 psi | 77% | 2972 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,550 psi | 59% | 2805 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 80% | 46,456 psi | 73% | 2940 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 47,485 psi | 74% | 3031 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 98% | 52,156 psi | 82% | 3150 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,488 psi | 81% | 3166 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 47,805 psi | 75% | 3035 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,036 psi | 74% | 2966 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,053 psi | 78% | 3035 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,564 psi | 57% | 2815 fps | 97.2% |
| Alliant Reloder-17 | 70 gr | 80% | 41,568 psi | 65% | 2956 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 47,224 psi | 74% | 3025 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 47,776 psi | 75% | 3081 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,631 psi | 45% | 2598 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 94% | 36,970 psi | 58% | 2854 fps | 95.8% |
| Alliant Reloder-26 | 77.1 gr | 86% | 35,534 psi | 56% | 2858 fps | 96.1% |
| Bofors RP15 | <<locked>> | 98% | 46,905 psi | 74% | 3058 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 47,413 psi | 74% | 2979 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 47,776 psi | 75% | 3081 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 41,582 psi | 65% | 2828 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 47,747 psi | 75% | 2986 fps | 99% |
| Hodgdon H414 | <<locked>> | 82% | 42,351 psi | 66% | 2920 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 82% | 45,411 psi | 71% | 2949 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,171 psi | 54% | 2707 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,069 psi | 82% | 3091 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 41,611 psi | 65% | 2933 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,166 psi | 43% | 1775 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,765 psi | 83% | 3054 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,820 psi | 77% | 2976 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,097 psi | 80% | 3005 fps | 98% |
| IMR 4350 | <<locked>> | 84% | 42,409 psi | 66% | 2867 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,931 psi | 67% | 2861 fps | 95.9% |
| IMR 4831 | <<locked>> | 80% | 36,114 psi | 57% | 2756 fps | 96.8% |
| IMR 4895 | <<locked>> | 80% | 51,372 psi | 81% | 3071 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,925 psi | 85% | 3087 fps | 95.3% |
| Lovex S060 | <<locked>> | 80% | 53,345 psi | 84% | 3022 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,008 psi | 77% | 2976 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,582 psi | 64% | 2812 fps | 96.8% |
| Lovex S070 | <<locked>> | 82% | 41,394 psi | 65% | 2844 fps | 95.8% |
| Lovex S071 | <<locked>> | 94% | 37,594 psi | 59% | 2782 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 53,417 psi | 84% | 3041 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,172 psi | 85% | 3041 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,429 psi | 77% | 3022 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 48,312 psi | 76% | 3025 fps | 95.6% |
| Norma MRP | <<locked>> | 90% | 41,031 psi | 64% | 2963 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 37,362 psi | 59% | 2802 fps | 97% |
| Ramshot Big Game | <<locked>> | 80% | 49,951 psi | 78% | 3045 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 49,777 psi | 78% | 3123 fps | 95% |
| Ramshot Hunter | <<locked>> | 82% | 38,754 psi | 61% | 2841 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 98% | 44,440 psi | 70% | 2986 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,615 psi | 43% | 1814 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,659 psi | 75% | 2966 fps | 97.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,150 psi | 69% | 3018 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,347 psi | 59% | 2822 fps | 96.8% |
| ReloadSwiss RS 70 | 71.1 gr | 80% | 36,347 psi | 57% | 2825 fps | 95.9% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 41,031 psi | 64% | 2989 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 50,952 psi | 80% | 2992 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,512 psi | 70% | 2913 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 52,446 psi | 82% | 3071 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 92% | 46,311 psi | 73% | 3005 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 41,582 psi | 65% | 2828 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,582 psi | 64% | 2812 fps | 96.8% |
| Shooters World Precision | <<locked>> | 80% | 49,008 psi | 77% | 2976 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 41,394 psi | 65% | 2844 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,672 psi | 72% | 2969 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,113 psi | 83% | 3068 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,056 psi | 85% | 2972 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,759 psi | 72% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,755 psi | 62% | 2749 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,890 psi | 72% | 3002 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 53,940 psi | 85% | 2969 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,846 psi | 70% | 2917 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 33,881 psi | 53% | 2753 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 43,947 psi | 69% | 2927 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 51,068 psi | 80% | 2956 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,271 psi | 80% | 2966 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,815 psi | 67% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,725 psi | 61% | 2802 fps | 97.4% |
| Vihtavuori N165 | <<locked>> | 94% | 43,265 psi | 68% | 2897 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 49,690 psi | 78% | 2959 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,305 psi | 60% | 2802 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 31,705 psi | 50% | 2687 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,956 psi | 59% | 2772 fps | 99.1% |
| Winchester 760 | <<locked>> | 80% | 39,740 psi | 62% | 2861 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 84% | 27,151 psi | 43% | 2625 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,345 psi | 84% | 3077 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,615 psi | 73% | 2972 fps | 95.3% |
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 90 powders for .300 Weath. Mag. loaded with the .308 | 150gr | Berger Target FB. Alliant Reloder-26 delivers the highest muzzle velocity at 3,291 fps; across all powders the maximum-charge window runs from 1,982 fps to 3,291 fps. Accurate 3100 gives the best case fill at 100 %, and 90 of the 90 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, 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. ReloadSwiss RS 70, Alliant Reloder-26, Alliant Reloder-17 rank at the top here: for .300 Weath. Mag. with the .308 | 150gr | Berger Target FB 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.