Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 155gr | Berger VLD Target bullet and 88 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 Norma MRP.
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% | 55,579 psi | 87% | 2972 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,840 psi | 89% | 3041 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,100 psi | 86% | 3081 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 56,043 psi | 88% | 3028 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,261 psi | 90% | 3143 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 56,057 psi | 88% | 3061 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,404 psi | 85% | 3120 fps | 97.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,825 psi | 87% | 3173 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,564 psi | 87% | 3189 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,898 psi | 89% | 3087 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,101 psi | 89% | 3110 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,711 psi | 90% | 3199 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,405 psi | 87% | 3166 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,450 psi | 90% | 3169 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,810 psi | 86% | 3169 fps | 97.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,634 psi | 81% | 3097 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,078 psi | 71% | 3012 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,796 psi | 87% | 3248 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,125 psi | 79% | 3081 fps | 96.6% |
| Bofors RP3 | <<locked>> | 84% | 54,331 psi | 85% | 3051 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,810 psi | 86% | 3169 fps | 97.7% |
| Bofors RP7 | <<locked>> | 90% | 57,232 psi | 90% | 3087 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 84% | 54,607 psi | 86% | 3064 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 55,651 psi | 87% | 3136 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 88% | 55,245 psi | 87% | 3091 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,491 psi | 85% | 3064 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,912 psi | 88% | 3104 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 55,869 psi | 88% | 3169 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,347 psi | 57% | 1942 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,463 psi | 88% | 3068 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,434 psi | 87% | 3045 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,679 psi | 86% | 3022 fps | 98.7% |
| IMR 4350 | <<locked>> | 92% | 54,853 psi | 86% | 3064 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,230 psi | 87% | 3054 fps | 98.7% |
| IMR 4831 | <<locked>> | 94% | 57,464 psi | 90% | 3127 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,027 psi | 86% | 3084 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,363 psi | 90% | 3104 fps | 96.3% |
| Lovex S060 | <<locked>> | 82% | 57,000 psi | 89% | 3031 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,840 psi | 88% | 3041 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,390 psi | 87% | 3054 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 56,782 psi | 89% | 3097 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,803 psi | 72% | 2920 fps | 98% |
| Norma 201 | <<locked>> | 82% | 56,913 psi | 89% | 3048 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,740 psi | 90% | 3045 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,391 psi | 88% | 3094 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,521 psi | 87% | 3114 fps | 97.5% |
| Norma MRP | <<locked>> | 98% | 54,534 psi | 85% | 3199 fps | 98.8% |
| Norma URP | <<locked>> | 92% | 55,564 psi | 87% | 3120 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,406 psi | 90% | 3123 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,490 psi | 84% | 3156 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 92% | 54,476 psi | 85% | 3117 fps | 99.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,877 psi | 75% | 3018 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,130 psi | 58% | 1991 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,578 psi | 86% | 3045 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,853 psi | 86% | 3159 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 57,203 psi | 90% | 3163 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,593 psi | 87% | 3192 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,077 psi | 69% | 3028 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 82% | 54,273 psi | 85% | 2999 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,433 psi | 85% | 3045 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,043 psi | 88% | 3091 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 98% | 56,739 psi | 89% | 3153 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 57,232 psi | 90% | 3087 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,390 psi | 87% | 3054 fps | 99.5% |
| Shooters World Precision | <<locked>> | 84% | 55,840 psi | 88% | 3041 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,782 psi | 89% | 3097 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,086 psi | 88% | 3107 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,898 psi | 89% | 3081 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,187 psi | 86% | 2927 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,201 psi | 87% | 3005 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,246 psi | 88% | 3150 fps | 97.9% |
| Somchem S335 | <<locked>> | 82% | 57,319 psi | 90% | 2972 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 54,259 psi | 85% | 3038 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 55,158 psi | 86% | 3127 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,319 psi | 90% | 3127 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 82% | 54,694 psi | 86% | 2959 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,926 psi | 86% | 2976 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,637 psi | 87% | 3015 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,143 psi | 85% | 3058 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,026 psi | 83% | 3038 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 84% | 56,550 psi | 89% | 3018 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,985 psi | 89% | 3120 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 54,215 psi | 85% | 3127 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,795 psi | 84% | 3025 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,651 psi | 87% | 3136 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,934 psi | 74% | 3156 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,029 psi | 89% | 3087 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,795 psi | 84% | 3061 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% | 52,083 psi | 82% | 2920 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,806 psi | 78% | 2920 fps | 97.3% |
| Accurate 3100 | <<locked>> | 88% | 36,521 psi | 57% | 2717 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 49,342 psi | 77% | 2923 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,826 psi | 59% | 2772 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 80% | 46,456 psi | 73% | 2894 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 47,761 psi | 75% | 2995 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 98% | 52,083 psi | 82% | 3104 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,576 psi | 81% | 3120 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,094 psi | 74% | 2923 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,357 psi | 79% | 2995 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,767 psi | 58% | 2782 fps | 97.6% |
| Alliant Reloder-17 | 68.6 gr | 80% | 41,785 psi | 65% | 2917 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 47,311 psi | 74% | 2986 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 44,643 psi | 70% | 2972 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,718 psi | 45% | 2569 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,838 psi | 55% | 2756 fps | 95.1% |
| Alliant Reloder-26 | 73.8 gr | 84% | 33,228 psi | 52% | 2756 fps | 95.3% |
| Bofors RP15 | <<locked>> | 98% | 46,978 psi | 74% | 3018 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 47,558 psi | 75% | 2933 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 44,643 psi | 70% | 2972 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 41,829 psi | 66% | 2792 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 47,863 psi | 75% | 2943 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 39,740 psi | 62% | 2818 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 82% | 45,426 psi | 71% | 2904 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,200 psi | 54% | 2664 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,286 psi | 82% | 3045 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 41,655 psi | 65% | 2894 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 43% | 1739 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,837 psi | 83% | 3009 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,878 psi | 77% | 2930 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,213 psi | 80% | 2963 fps | 98.2% |
| IMR 4350 | <<locked>> | 84% | 42,612 psi | 67% | 2828 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,149 psi | 68% | 2825 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 36,216 psi | 57% | 2717 fps | 97.1% |
| IMR 4895 | <<locked>> | 80% | 51,677 psi | 81% | 3028 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,911 psi | 84% | 3041 fps | 95.5% |
| Lovex S060 | <<locked>> | 80% | 53,592 psi | 84% | 2976 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,226 psi | 77% | 2930 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,611 psi | 64% | 2769 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 39,001 psi | 61% | 2749 fps | 95.3% |
| Lovex S071 | <<locked>> | 94% | 37,608 psi | 59% | 2743 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 53,476 psi | 84% | 2995 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,259 psi | 85% | 2995 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,734 psi | 78% | 2982 fps | 100% |
| Norma 204 | <<locked>> | 86% | 45,368 psi | 71% | 2923 fps | 95% |
| Norma MRP | 76.7 gr | 90% | 41,017 psi | 64% | 2923 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 37,594 psi | 59% | 2766 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 80% | 50,038 psi | 78% | 3002 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 49,951 psi | 78% | 3087 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 36,405 psi | 57% | 2746 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 98% | 44,483 psi | 70% | 2946 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,760 psi | 44% | 1781 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,863 psi | 75% | 2923 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,396 psi | 70% | 2979 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,536 psi | 59% | 2785 fps | 97.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,419 psi | 57% | 2785 fps | 96.3% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 41,162 psi | 65% | 2956 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 50,981 psi | 80% | 2946 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,773 psi | 70% | 2877 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 49,342 psi | 77% | 2969 fps | 95% |
| Rottweil R 905 | <<locked>> | 92% | 46,369 psi | 73% | 2966 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 41,829 psi | 66% | 2792 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,611 psi | 64% | 2769 fps | 97% |
| Shooters World Precision | <<locked>> | 80% | 49,226 psi | 77% | 2930 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,001 psi | 61% | 2749 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,876 psi | 72% | 2930 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,330 psi | 84% | 3022 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,905 psi | 72% | 2785 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,856 psi | 62% | 2710 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,948 psi | 72% | 2959 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 53,954 psi | 85% | 2923 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,904 psi | 70% | 2874 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 33,968 psi | 53% | 2717 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 41,263 psi | 65% | 2825 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 51,256 psi | 80% | 2910 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,576 psi | 81% | 2923 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,047 psi | 67% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,957 psi | 61% | 2766 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 94% | 43,395 psi | 68% | 2861 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 49,850 psi | 78% | 2913 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,450 psi | 60% | 2766 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 80% | 29,718 psi | 47% | 2592 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,072 psi | 60% | 2733 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 39,740 psi | 62% | 2818 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 84% | 27,238 psi | 43% | 2598 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,388 psi | 84% | 3028 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,804 psi | 73% | 2933 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 100 powders for .300 Weath. Mag. loaded with the .308 | 155gr | Berger VLD Target. Alliant Reloder-26 delivers the highest muzzle velocity at 3,248 fps; across all powders the maximum-charge window runs from 1,942 fps to 3,248 fps. Accurate 3100 gives the best case fill at 100 %, and 100 of the 100 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 155.0 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, Norma MRP rank at the top here: for .300 Weath. Mag. with the .308 | 155gr | Berger VLD Target 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.