Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 150gr | Alaska Bullet Works Kodiak SP PSPBC bullet and 89 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.
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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% | 55,434 psi | 87% | 3018 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,681 psi | 89% | 3084 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,766 psi | 86% | 3120 fps | 99.2% |
| Accurate 4064 | <<locked>> | 84% | 55,811 psi | 87% | 3074 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,898 psi | 89% | 3182 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,854 psi | 88% | 3107 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,186 psi | 85% | 3163 fps | 97.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,463 psi | 87% | 3209 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,158 psi | 86% | 3232 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,623 psi | 89% | 3130 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,855 psi | 89% | 3153 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,450 psi | 90% | 3245 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,042 psi | 86% | 3209 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,217 psi | 90% | 3209 fps | 97.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,433 psi | 85% | 3205 fps | 97.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,343 psi | 80% | 3140 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,773 psi | 70% | 3048 fps | 98.4% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,506 psi | 87% | 3287 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,806 psi | 78% | 3117 fps | 96.2% |
| Bofors RP3 | <<locked>> | 84% | 54,027 psi | 85% | 3091 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,433 psi | 85% | 3205 fps | 97.4% |
| Bofors RP7 | <<locked>> | 90% | 56,884 psi | 89% | 3127 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 84% | 54,273 psi | 85% | 3104 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% | 54,201 psi | 85% | 3104 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,608 psi | 87% | 3146 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 55,767 psi | 87% | 3212 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,274 psi | 57% | 1978 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,115 psi | 88% | 3110 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,303 psi | 87% | 3087 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,288 psi | 85% | 3061 fps | 98.5% |
| IMR 4350 | <<locked>> | 92% | 54,578 psi | 86% | 3104 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,129 psi | 86% | 3100 fps | 98.6% |
| IMR 4831 | <<locked>> | 94% | 57,130 psi | 90% | 3169 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,853 psi | 86% | 3130 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,130 psi | 90% | 3143 fps | 96% |
| Lovex S060 | <<locked>> | 82% | 56,681 psi | 89% | 3074 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,419 psi | 87% | 3081 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,288 psi | 87% | 3097 fps | 99.4% |
| Lovex S070 | <<locked>> | 92% | 56,739 psi | 89% | 3143 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,469 psi | 71% | 2956 fps | 97.7% |
| Norma 201 | <<locked>> | 82% | 56,826 psi | 89% | 3097 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,392 psi | 90% | 3091 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,144 psi | 88% | 3136 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,317 psi | 87% | 3156 fps | 97.2% |
| Norma MRP | <<locked>> | 98% | 54,114 psi | 85% | 3232 fps | 98.6% |
| Norma URP | <<locked>> | 92% | 55,506 psi | 87% | 3166 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 57,203 psi | 90% | 3166 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,258 psi | 83% | 3192 fps | 96% |
| Ramshot Hunter | <<locked>> | 92% | 54,317 psi | 85% | 3159 fps | 99.2% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,790 psi | 75% | 3058 fps | 96.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,043 psi | 58% | 2028 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,230 psi | 85% | 3084 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,592 psi | 86% | 3205 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,710 psi | 89% | 3202 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,303 psi | 87% | 3232 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,961 psi | 69% | 3061 fps | 96.4% |
| Rottweil R 902 | <<locked>> | 84% | 57,406 psi | 90% | 3097 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,128 psi | 85% | 3087 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,869 psi | 88% | 3133 fps | 96.3% |
| Rottweil R 905 | <<locked>> | 98% | 56,463 psi | 88% | 3196 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 90% | 56,884 psi | 89% | 3127 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,288 psi | 87% | 3097 fps | 99.4% |
| Shooters World Precision | <<locked>> | 84% | 55,419 psi | 87% | 3081 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,739 psi | 89% | 3143 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,709 psi | 87% | 3146 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,623 psi | 89% | 3123 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,551 psi | 90% | 3025 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,027 psi | 86% | 2976 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,013 psi | 86% | 3045 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,970 psi | 88% | 3189 fps | 97.7% |
| Somchem S335 | <<locked>> | 82% | 57,246 psi | 90% | 3018 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,667 psi | 90% | 3140 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 54,752 psi | 86% | 3169 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,203 psi | 90% | 3169 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 82% | 54,433 psi | 85% | 3005 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,549 psi | 85% | 3015 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,506 psi | 87% | 3058 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 57,609 psi | 90% | 3159 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,692 psi | 83% | 3077 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 84% | 56,304 psi | 88% | 3061 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,608 psi | 89% | 3159 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 3225 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 57,464 psi | 90% | 3123 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,535 psi | 87% | 3179 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,717 psi | 73% | 3199 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,942 psi | 89% | 3133 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 3163 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% | 51,822 psi | 81% | 2966 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,617 psi | 78% | 2959 fps | 97% |
| Accurate 3100 | <<locked>> | 90% | 38,856 psi | 61% | 2812 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 49,052 psi | 77% | 2966 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,507 psi | 59% | 2805 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 80% | 46,253 psi | 72% | 2933 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 47,514 psi | 74% | 3031 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 98% | 51,982 psi | 81% | 3143 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,300 psi | 80% | 3166 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,862 psi | 73% | 2963 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,067 psi | 78% | 3038 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,550 psi | 57% | 2815 fps | 97.2% |
| Alliant Reloder-17 | 69.9 gr | 80% | 41,553 psi | 65% | 2956 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 47,050 psi | 74% | 3022 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 47,630 psi | 75% | 3074 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,616 psi | 45% | 2598 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 94% | 36,869 psi | 58% | 2851 fps | 95.7% |
| Alliant Reloder-26 | 77 gr | 86% | 35,534 psi | 56% | 2858 fps | 96.1% |
| Bofors RP15 | <<locked>> | 98% | 46,746 psi | 73% | 3054 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 47,239 psi | 74% | 2972 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 47,630 psi | 75% | 3074 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 41,597 psi | 65% | 2828 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 47,529 psi | 74% | 2982 fps | 99% |
| Hodgdon H414 | <<locked>> | 82% | 42,163 psi | 66% | 2917 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 82% | 45,252 psi | 71% | 2943 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,997 psi | 53% | 2700 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,025 psi | 82% | 3087 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 41,437 psi | 65% | 2927 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,079 psi | 42% | 1772 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,750 psi | 83% | 3054 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,617 psi | 76% | 2972 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,894 psi | 80% | 3002 fps | 98% |
| IMR 4350 | <<locked>> | 84% | 42,235 psi | 66% | 2861 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,946 psi | 67% | 2861 fps | 95.9% |
| IMR 4831 | <<locked>> | 80% | 36,114 psi | 57% | 2756 fps | 96.8% |
| IMR 4895 | <<locked>> | 80% | 51,343 psi | 80% | 3068 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,737 psi | 84% | 3084 fps | 95.2% |
| Lovex S060 | <<locked>> | 80% | 53,359 psi | 84% | 3022 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,979 psi | 77% | 2972 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,393 psi | 63% | 2808 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 41,249 psi | 65% | 2841 fps | 95.8% |
| Lovex S071 | <<locked>> | 94% | 37,420 psi | 59% | 2779 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 53,200 psi | 83% | 3038 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,954 psi | 85% | 3038 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,414 psi | 77% | 3022 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 48,167 psi | 75% | 3022 fps | 95.5% |
| Norma MRP | <<locked>> | 90% | 40,901 psi | 64% | 2959 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 37,318 psi | 58% | 2799 fps | 97% |
| Ramshot Big Game | <<locked>> | 80% | 49,748 psi | 78% | 3041 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 49,603 psi | 78% | 3120 fps | 95% |
| Ramshot Hunter | <<locked>> | 82% | 38,769 psi | 61% | 2844 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 98% | 44,295 psi | 69% | 2982 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,673 psi | 43% | 1814 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,688 psi | 75% | 2963 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,164 psi | 69% | 3018 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,318 psi | 58% | 2822 fps | 96.8% |
| ReloadSwiss RS 70 | 70.9 gr | 80% | 36,187 psi | 57% | 2822 fps | 95.8% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,915 psi | 64% | 2986 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 50,749 psi | 80% | 2989 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,512 psi | 70% | 2917 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 52,286 psi | 82% | 3068 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 92% | 46,108 psi | 72% | 3005 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 41,597 psi | 65% | 2828 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,393 psi | 63% | 2808 fps | 96.7% |
| Shooters World Precision | <<locked>> | 80% | 48,979 psi | 77% | 2972 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 41,249 psi | 65% | 2841 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,672 psi | 72% | 2972 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,113 psi | 83% | 3064 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,056 psi | 85% | 2972 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,716 psi | 72% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,610 psi | 62% | 2746 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,687 psi | 72% | 2995 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 53,708 psi | 84% | 2966 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,657 psi | 70% | 2910 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 33,678 psi | 53% | 2749 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 43,816 psi | 69% | 2923 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% | 42,801 psi | 67% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,682 psi | 61% | 2802 fps | 97.4% |
| Vihtavuori N165 | <<locked>> | 94% | 43,091 psi | 68% | 2894 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 49,487 psi | 78% | 2953 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,116 psi | 60% | 2799 fps | 97% |
| Vihtavuori N555 | <<locked>> | 82% | 31,546 psi | 49% | 2680 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,985 psi | 60% | 2772 fps | 99.1% |
| Winchester 760 | <<locked>> | 82% | 42,337 psi | 66% | 2920 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 86% | 28,877 psi | 45% | 2694 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,142 psi | 83% | 3071 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,427 psi | 73% | 2969 fps | 95.2% |
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 | Alaska Bullet Works Kodiak SP PSPBC. Alliant Reloder-26 delivers the highest muzzle velocity at 3,287 fps; across all powders the maximum-charge window runs from 1,978 fps to 3,287 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 1:14.0 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. ReloadSwiss RS 70, Alliant Reloder-26, Alliant Reloder-17 rank at the top here: for .300 Weath. Mag. with the .308 | 150gr | Alaska Bullet Works Kodiak SP PSPBC 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.