Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 150gr | Woodleigh HS bullet and 87 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% | 56,376 psi | 88% | 3035 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,551 psi | 90% | 3100 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,014 psi | 88% | 3143 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 56,681 psi | 89% | 3091 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,215 psi | 85% | 3140 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 56,536 psi | 89% | 3120 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,187 psi | 86% | 3182 fps | 97.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,753 psi | 89% | 3238 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,159 psi | 88% | 3251 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 55,216 psi | 87% | 3176 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,624 psi | 90% | 3150 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,244 psi | 85% | 3114 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,824 psi | 86% | 3202 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,260 psi | 88% | 3228 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,462 psi | 85% | 3166 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3232 fps | 97.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,620 psi | 82% | 3159 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,774 psi | 72% | 3074 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 57,014 psi | 89% | 3310 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,981 psi | 80% | 3143 fps | 96.6% |
| Bofors RP3 | <<locked>> | 84% | 55,042 psi | 86% | 3110 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3232 fps | 97.8% |
| Bofors RP7 | <<locked>> | 88% | 54,302 psi | 85% | 3087 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 84% | 55,201 psi | 87% | 3120 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 56,405 psi | 88% | 3199 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 55,898 psi | 88% | 3153 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,376 psi | 87% | 3127 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,565 psi | 89% | 3166 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 56,797 psi | 89% | 3232 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,390 psi | 57% | 1988 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,058 psi | 89% | 3127 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,043 psi | 88% | 3107 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,143 psi | 86% | 3084 fps | 98.7% |
| IMR 4350 | <<locked>> | 92% | 55,332 psi | 87% | 3120 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,941 psi | 88% | 3120 fps | 98.8% |
| IMR 4831 | <<locked>> | 92% | 54,708 psi | 86% | 3133 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 55,637 psi | 87% | 3143 fps | 100% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,041 psi | 85% | 3202 fps | 96% |
| Lovex S060 | <<locked>> | 82% | 57,421 psi | 90% | 3091 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 56,434 psi | 88% | 3100 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,101 psi | 88% | 3114 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 57,522 psi | 90% | 3159 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,427 psi | 73% | 2976 fps | 98% |
| Norma 201 | <<locked>> | 82% | 57,609 psi | 90% | 3110 fps | 100% |
| Norma 203B | <<locked>> | 84% | 57,087 psi | 89% | 3156 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,347 psi | 88% | 3176 fps | 97.5% |
| Norma MRP | <<locked>> | 98% | 55,317 psi | 87% | 3258 fps | 98.8% |
| Norma URP | <<locked>> | 92% | 56,405 psi | 88% | 3182 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,259 psi | 85% | 3123 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,607 psi | 86% | 3222 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 92% | 55,317 psi | 87% | 3179 fps | 99.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,791 psi | 76% | 3081 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,159 psi | 58% | 2037 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,056 psi | 86% | 3104 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,564 psi | 87% | 3222 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,085 psi | 85% | 3163 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,304 psi | 88% | 3255 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,947 psi | 70% | 3091 fps | 96.9% |
| Rottweil R 902 | <<locked>> | 82% | 54,795 psi | 86% | 3061 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,071 psi | 86% | 3107 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,811 psi | 89% | 3150 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 98% | 57,508 psi | 90% | 3215 fps | 98% |
| Rottweil R 907 | <<locked>> | 88% | 54,302 psi | 85% | 3087 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,101 psi | 88% | 3114 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 56,434 psi | 88% | 3100 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,522 psi | 90% | 3159 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,782 psi | 89% | 3169 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,566 psi | 90% | 3143 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,782 psi | 87% | 2989 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,738 psi | 87% | 3064 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,014 psi | 89% | 3212 fps | 98% |
| Somchem S355 | <<locked>> | 86% | 54,955 psi | 86% | 3100 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 55,956 psi | 88% | 3186 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,462 psi | 85% | 3130 fps | 98.2% |
| Vihtavuori N135 | <<locked>> | 82% | 55,114 psi | 86% | 3018 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,303 psi | 87% | 3031 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,391 psi | 88% | 3074 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,955 psi | 86% | 3120 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,780 psi | 84% | 3100 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 57,130 psi | 90% | 3074 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,056 psi | 85% | 3120 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 98% | 55,071 psi | 86% | 3189 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,477 psi | 87% | 3241 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,679 psi | 86% | 3084 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,405 psi | 88% | 3199 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,022 psi | 75% | 3222 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,578 psi | 86% | 3120 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% | 52,721 psi | 83% | 2979 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,256 psi | 79% | 2976 fps | 97.2% |
| Accurate 3100 | <<locked>> | 88% | 37,115 psi | 58% | 2772 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 49,937 psi | 78% | 2986 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,261 psi | 60% | 2825 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 80% | 46,978 psi | 74% | 2949 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 48,240 psi | 76% | 3051 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 98% | 52,852 psi | 83% | 3166 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,257 psi | 82% | 3182 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 45,469 psi | 71% | 2989 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,601 psi | 75% | 2979 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,836 psi | 80% | 3054 fps | 99.9% |
| Alliant Reloder-16 | 65.9 gr | 80% | 37,072 psi | 58% | 2835 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,264 psi | 66% | 2972 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 90% | 44,947 psi | 70% | 2979 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 94% | 45,411 psi | 71% | 3031 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 82% | 29,153 psi | 46% | 2618 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 92% | 35,230 psi | 55% | 2808 fps | 95.1% |
| Alliant Reloder-26 | 76.4 gr | 84% | 33,721 psi | 53% | 2808 fps | 95.3% |
| Bofors RP15 | <<locked>> | 98% | 47,688 psi | 75% | 3077 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 48,008 psi | 75% | 2989 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 45,411 psi | 71% | 3031 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 42,264 psi | 66% | 2848 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 48,428 psi | 76% | 3002 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 40,248 psi | 63% | 2874 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 82% | 46,079 psi | 72% | 2966 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,679 psi | 54% | 2720 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,837 psi | 83% | 3104 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 42,163 psi | 66% | 2949 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,180 psi | 43% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,505 psi | 84% | 3071 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,414 psi | 77% | 2989 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,793 psi | 81% | 3022 fps | 98.2% |
| IMR 4350 | <<locked>> | 84% | 43,018 psi | 67% | 2884 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,584 psi | 68% | 2881 fps | 96.2% |
| IMR 4831 | <<locked>> | 80% | 36,811 psi | 58% | 2776 fps | 97.1% |
| IMR 4895 | <<locked>> | 80% | 52,141 psi | 82% | 3084 fps | 100% |
| IMR 7828 SSC | <<locked>> | 98% | 50,459 psi | 79% | 3133 fps | 95% |
| Lovex S060 | <<locked>> | 80% | 54,114 psi | 85% | 3038 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,792 psi | 78% | 2989 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,075 psi | 64% | 2825 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 39,392 psi | 62% | 2802 fps | 95.3% |
| Lovex S071 | <<locked>> | 94% | 38,203 psi | 60% | 2799 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 54,027 psi | 85% | 3054 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,183 psi | 79% | 3038 fps | 100% |
| Norma 204 | <<locked>> | 86% | 45,963 psi | 72% | 2982 fps | 95% |
| Norma MRP | 79.5 gr | 90% | 41,785 psi | 65% | 2986 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 38,029 psi | 60% | 2818 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 80% | 50,676 psi | 79% | 3061 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 50,662 psi | 79% | 3146 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 36,854 psi | 58% | 2799 fps | 95% |
| Ramshot Magnum | <<locked>> | 98% | 45,252 psi | 71% | 3009 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,775 psi | 44% | 1824 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,327 psi | 76% | 2982 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,875 psi | 70% | 3035 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,014 psi | 60% | 2838 fps | 97.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,883 psi | 58% | 2841 fps | 96.3% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 41,742 psi | 65% | 3012 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 51,576 psi | 81% | 3005 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,310 psi | 71% | 2933 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 50,038 psi | 78% | 3031 fps | 95% |
| Rottweil R 905 | <<locked>> | 92% | 47,094 psi | 74% | 3025 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 42,264 psi | 66% | 2848 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,075 psi | 64% | 2825 fps | 97% |
| Shooters World Precision | <<locked>> | 80% | 49,792 psi | 78% | 2989 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,392 psi | 62% | 2802 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,383 psi | 73% | 2986 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,838 psi | 84% | 3081 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,311 psi | 73% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,335 psi | 63% | 2766 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 46,673 psi | 73% | 3018 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 45,426 psi | 71% | 2930 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 34,389 psi | 54% | 2769 fps | 99.1% |
| Somchem S385 | <<locked>> | 88% | 41,887 psi | 66% | 2884 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 51,750 psi | 81% | 2969 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,054 psi | 82% | 2982 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,511 psi | 68% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,407 psi | 62% | 2822 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 94% | 44,150 psi | 69% | 2917 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 50,357 psi | 79% | 2969 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,957 psi | 61% | 2818 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 32,227 psi | 51% | 2700 fps | 95.9% |
| Vihtavuori N560 | <<locked>> | 96% | 51,938 psi | 81% | 3176 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,667 psi | 61% | 2789 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 40,248 psi | 63% | 2874 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 84% | 27,586 psi | 43% | 2644 fps | 95.5% |
| Winchester Supreme 780 | <<locked>> | 94% | 47,514 psi | 74% | 2992 fps | 95.7% |
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 87 powders for .300 Weath. Mag. loaded with the .308 | 150gr | Woodleigh HS. Alliant Reloder-26 delivers the highest muzzle velocity at 3,310 fps; across all powders the maximum-charge window runs from 1,988 fps to 3,310 fps. Accurate 3100 gives the best case fill at 100 %, and 87 of the 87 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 1:15.5 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 | Woodleigh HS 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.