Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 150gr | Ferrobull Entox Sport bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Alliant Reloder-17 and Winchester 760.
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% | 54,636 psi | 86% | 3022 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,434 psi | 88% | 3097 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,636 psi | 86% | 3133 fps | 99.3% |
| Accurate 4064 | <<locked>> | 84% | 55,259 psi | 87% | 3081 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,608 psi | 89% | 3192 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,796 psi | 87% | 3117 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,317 psi | 85% | 3176 fps | 97.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,869 psi | 88% | 3232 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,332 psi | 87% | 3245 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,666 psi | 89% | 3143 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,695 psi | 89% | 3166 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 53,969 psi | 85% | 3199 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,274 psi | 87% | 3225 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,246 psi | 90% | 3225 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 3222 fps | 97.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,576 psi | 81% | 3153 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,744 psi | 70% | 3058 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,796 psi | 87% | 3304 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,922 psi | 78% | 3133 fps | 96.5% |
| Bofors RP3 | <<locked>> | 86% | 57,421 psi | 90% | 3159 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 3222 fps | 97.7% |
| Bofors RP7 | <<locked>> | 90% | 56,811 psi | 89% | 3143 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 84% | 54,215 psi | 85% | 3117 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 90% | 55,245 psi | 87% | 3186 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 88% | 55,114 psi | 86% | 3150 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,157 psi | 85% | 3117 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,709 psi | 87% | 3159 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 55,985 psi | 88% | 3228 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,216 psi | 57% | 1991 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,130 psi | 88% | 3127 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,288 psi | 87% | 3104 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,230 psi | 85% | 3077 fps | 98.6% |
| IMR 4350 | <<locked>> | 92% | 54,520 psi | 85% | 3117 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,245 psi | 87% | 3117 fps | 98.7% |
| IMR 4831 | <<locked>> | 94% | 57,145 psi | 90% | 3182 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,520 psi | 85% | 3136 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,363 psi | 90% | 3163 fps | 96.3% |
| Lovex S060 | <<locked>> | 82% | 56,753 psi | 89% | 3091 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,259 psi | 87% | 3094 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,114 psi | 86% | 3110 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 56,492 psi | 89% | 3153 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,078 psi | 71% | 2959 fps | 97.8% |
| Norma 201 | <<locked>> | 82% | 56,391 psi | 88% | 3107 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,319 psi | 90% | 3104 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,985 psi | 88% | 3150 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,434 psi | 87% | 3173 fps | 97.4% |
| Norma MRP | <<locked>> | 98% | 54,433 psi | 85% | 3251 fps | 98.8% |
| Norma URP | <<locked>> | 92% | 55,448 psi | 87% | 3179 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 57,217 psi | 90% | 3179 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,548 psi | 84% | 3215 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 92% | 54,389 psi | 85% | 3173 fps | 99.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,659 psi | 75% | 3068 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,912 psi | 58% | 2037 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,172 psi | 85% | 3100 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,665 psi | 86% | 3219 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,884 psi | 89% | 3219 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,332 psi | 87% | 3245 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,874 psi | 69% | 3074 fps | 96.6% |
| Rottweil R 902 | <<locked>> | 84% | 57,217 psi | 90% | 3107 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,464 psi | 90% | 3153 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,956 psi | 88% | 3146 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 98% | 56,507 psi | 89% | 3209 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 56,811 psi | 89% | 3143 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,114 psi | 86% | 3110 fps | 99.5% |
| Shooters World Precision | <<locked>> | 84% | 55,259 psi | 87% | 3094 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,492 psi | 89% | 3153 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,680 psi | 87% | 3159 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,536 psi | 89% | 3136 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,392 psi | 90% | 3035 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,056 psi | 86% | 2986 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,766 psi | 86% | 3058 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,014 psi | 88% | 3202 fps | 97.8% |
| Somchem S335 | <<locked>> | 82% | 56,913 psi | 89% | 3028 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,392 psi | 90% | 3150 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 54,882 psi | 86% | 3182 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,043 psi | 89% | 3179 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 84% | 57,711 psi | 90% | 3064 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,505 psi | 85% | 3031 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,245 psi | 87% | 3068 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 57,566 psi | 90% | 3173 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,779 psi | 83% | 3094 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 84% | 56,260 psi | 88% | 3074 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,637 psi | 89% | 3176 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 57,624 psi | 90% | 3238 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 57,711 psi | 90% | 3136 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,463 psi | 87% | 3192 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,862 psi | 73% | 3209 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,753 psi | 89% | 3143 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,725 psi | 90% | 3179 fps | 97.9% |
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% | 51,213 psi | 80% | 2969 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,414 psi | 77% | 2972 fps | 97.1% |
| Accurate 3100 | <<locked>> | 90% | 38,348 psi | 60% | 2812 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 48,559 psi | 76% | 2972 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,072 psi | 58% | 2808 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 80% | 46,253 psi | 72% | 2949 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 47,384 psi | 74% | 3045 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 98% | 51,895 psi | 81% | 3159 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,474 psi | 81% | 3179 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,543 psi | 73% | 2969 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,951 psi | 78% | 3048 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,289 psi | 57% | 2822 fps | 97.3% |
| Alliant Reloder-17 | 71.3 gr | 80% | 41,350 psi | 65% | 2963 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 46,920 psi | 74% | 3031 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 44,411 psi | 70% | 3022 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,094 psi | 44% | 2595 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 94% | 36,637 psi | 57% | 2858 fps | 95.9% |
| Alliant Reloder-26 | 78.5 gr | 86% | 35,128 psi | 55% | 2861 fps | 96.1% |
| Bofors RP15 | <<locked>> | 98% | 46,659 psi | 73% | 3068 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 46,905 psi | 74% | 2982 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 44,411 psi | 70% | 3022 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 41,191 psi | 65% | 2835 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 47,282 psi | 74% | 2989 fps | 99% |
| Hodgdon H414 | <<locked>> | 80% | 39,189 psi | 61% | 2861 fps | 95% |
| Hodgdon H4350 | <<locked>> | 82% | 45,107 psi | 71% | 2956 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,649 psi | 53% | 2707 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,938 psi | 81% | 3100 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 41,263 psi | 65% | 2936 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,006 psi | 42% | 1781 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,620 psi | 82% | 3068 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,646 psi | 76% | 2989 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,865 psi | 80% | 3018 fps | 98.1% |
| IMR 4350 | <<locked>> | 84% | 42,221 psi | 66% | 2877 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,685 psi | 67% | 2871 fps | 96.1% |
| IMR 4831 | <<locked>> | 80% | 35,650 psi | 56% | 2756 fps | 96.8% |
| IMR 4895 | <<locked>> | 80% | 51,271 psi | 80% | 3081 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,795 psi | 84% | 3100 fps | 95.5% |
| Lovex S060 | <<locked>> | 80% | 53,243 psi | 83% | 3031 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,660 psi | 76% | 2982 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,118 psi | 63% | 2815 fps | 96.8% |
| Lovex S070 | <<locked>> | 80% | 38,261 psi | 60% | 2785 fps | 95% |
| Lovex S071 | <<locked>> | 94% | 36,941 psi | 58% | 2779 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 53,026 psi | 83% | 3051 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,693 psi | 84% | 3048 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,284 psi | 77% | 3035 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 48,225 psi | 76% | 3038 fps | 95.8% |
| Norma MRP | <<locked>> | 90% | 40,727 psi | 64% | 2969 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 36,956 psi | 58% | 2802 fps | 97% |
| Ramshot Big Game | <<locked>> | 80% | 49,792 psi | 78% | 3054 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 49,632 psi | 78% | 3136 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 82% | 38,479 psi | 60% | 2848 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 98% | 44,338 psi | 69% | 3002 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,412 psi | 43% | 1824 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,456 psi | 74% | 2976 fps | 98% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,019 psi | 69% | 3028 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,941 psi | 58% | 2825 fps | 96.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,027 psi | 56% | 2828 fps | 96% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,799 psi | 64% | 2999 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 50,372 psi | 79% | 2995 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,019 psi | 69% | 2920 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 52,359 psi | 82% | 3084 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 92% | 45,948 psi | 72% | 3015 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 41,191 psi | 65% | 2835 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,118 psi | 63% | 2815 fps | 96.8% |
| Shooters World Precision | <<locked>> | 80% | 48,660 psi | 76% | 2982 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,261 psi | 60% | 2785 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,513 psi | 71% | 2979 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,055 psi | 83% | 3077 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,925 psi | 85% | 2986 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,556 psi | 71% | 2835 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,262 psi | 62% | 2753 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,527 psi | 71% | 3005 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 53,606 psi | 84% | 2979 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,454 psi | 70% | 2923 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 33,417 psi | 52% | 2753 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 43,671 psi | 68% | 2933 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 50,836 psi | 80% | 2966 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,039 psi | 80% | 2976 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,424 psi | 66% | 2848 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,493 psi | 60% | 2812 fps | 97.5% |
| Vihtavuori N165 | <<locked>> | 94% | 42,989 psi | 67% | 2904 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 49,313 psi | 77% | 2963 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,826 psi | 59% | 2805 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 31,096 psi | 49% | 2680 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,666 psi | 59% | 2776 fps | 99.2% |
| Winchester 760 | 69.8 gr | 80% | 39,363 psi | 62% | 2864 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 86% | 28,398 psi | 45% | 2690 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,997 psi | 83% | 3084 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,528 psi | 73% | 2982 fps | 95.5% |
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 101 powders for .300 Weath. Mag. loaded with the .308 | 150gr | Ferrobull Entox Sport. Alliant Reloder-26 delivers the highest muzzle velocity at 3,304 fps; across all powders the maximum-charge window runs from 1,991 fps to 3,304 fps. Accurate 3100 gives the best case fill at 100 %, and 101 of the 101 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 150.0 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. Alliant Reloder-26, Alliant Reloder-17, Winchester 760 rank at the top here: for .300 Weath. Mag. with the .308 | 150gr | Ferrobull Entox Sport 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.