Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 152gr | Lehigh Defense Controlled Chaos 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 Hodgdon Superformance.
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% | 54,462 psi | 85% | 2982 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,869 psi | 88% | 3048 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,722 psi | 84% | 3081 fps | 99.1% |
| Accurate 4064 | <<locked>> | 84% | 54,882 psi | 86% | 3038 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,840 psi | 88% | 3143 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 57,348 psi | 90% | 3120 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,114 psi | 86% | 3071 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,768 psi | 89% | 3182 fps | 97.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,172 psi | 85% | 3192 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,883 psi | 88% | 3094 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,028 psi | 88% | 3117 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,362 psi | 88% | 3205 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,954 psi | 85% | 3169 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,159 psi | 88% | 3169 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,461 psi | 84% | 3169 fps | 97.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,285 psi | 79% | 3100 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,005 psi | 69% | 3012 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,041 psi | 85% | 3245 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,348 psi | 90% | 3136 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,878 psi | 77% | 3081 fps | 96% |
| Bofors RP3 | <<locked>> | 86% | 56,826 psi | 89% | 3114 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,461 psi | 84% | 3169 fps | 97.2% |
| Bofors RP7 | <<locked>> | 90% | 56,057 psi | 88% | 3091 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 86% | 57,116 psi | 90% | 3127 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 54,389 psi | 85% | 3136 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 88% | 54,070 psi | 85% | 3094 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,811 psi | 89% | 3123 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,592 psi | 86% | 3110 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,505 psi | 85% | 3169 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,376 psi | 57% | 1959 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,492 psi | 87% | 3077 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,462 psi | 85% | 3051 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,217 psi | 90% | 3087 fps | 98.9% |
| IMR 4350 | <<locked>> | 94% | 57,101 psi | 89% | 3123 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,346 psi | 85% | 3064 fps | 98.4% |
| IMR 4831 | <<locked>> | 94% | 56,159 psi | 88% | 3133 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,522 psi | 90% | 3150 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 56,072 psi | 88% | 3038 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,839 psi | 86% | 3048 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,418 psi | 85% | 3061 fps | 99.3% |
| Lovex S070 | <<locked>> | 92% | 55,738 psi | 87% | 3104 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,585 psi | 70% | 2917 fps | 97.5% |
| Norma 201 | <<locked>> | 82% | 55,912 psi | 88% | 3061 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,710 psi | 89% | 3058 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,317 psi | 87% | 3100 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,259 psi | 85% | 3114 fps | 97% |
| Norma MRPᴾ | <<locked>> | 100% | 56,855 psi | 89% | 3258 fps | 99% |
| Norma URP | <<locked>> | 92% | 54,491 psi | 85% | 3127 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 56,362 psi | 88% | 3130 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 56,913 psi | 89% | 3182 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,673 psi | 73% | 3012 fps | 96.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,985 psi | 58% | 2005 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,029 psi | 89% | 3110 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,261 psi | 90% | 3192 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,363 psi | 90% | 3225 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,782 psi | 87% | 3166 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,273 psi | 85% | 3192 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 56,797 psi | 89% | 3064 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,898 psi | 89% | 3110 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,824 psi | 86% | 3091 fps | 96.1% |
| Rottweil R 905 | <<locked>> | 98% | 55,448 psi | 87% | 3156 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 90% | 56,057 psi | 88% | 3091 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,418 psi | 85% | 3061 fps | 99.3% |
| Shooters World Precision | <<locked>> | 84% | 54,839 psi | 86% | 3048 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,738 psi | 87% | 3104 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,795 psi | 86% | 3114 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,941 psi | 88% | 3091 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,811 psi | 89% | 2989 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,244 psi | 85% | 2940 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,056 psi | 85% | 3009 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,955 psi | 86% | 3150 fps | 97.5% |
| Somchem S335 | <<locked>> | 82% | 56,376 psi | 88% | 2986 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,710 psi | 89% | 3100 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 57,421 psi | 90% | 3186 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,014 psi | 88% | 3130 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 82% | 57,348 psi | 90% | 2972 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,014 psi | 89% | 3018 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,421 psi | 90% | 3035 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,607 psi | 86% | 3022 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,594 psi | 89% | 3123 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,793 psi | 81% | 3041 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 84% | 55,579 psi | 87% | 3028 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,724 psi | 87% | 3123 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,376 psi | 88% | 3189 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 57,116 psi | 90% | 3248 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,507 psi | 89% | 3087 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,607 psi | 86% | 3140 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,527 psi | 71% | 3153 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,999 psi | 88% | 3097 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,507 psi | 89% | 3127 fps | 97.5% |
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% | 51,010 psi | 80% | 2930 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,965 psi | 77% | 2923 fps | 96.8% |
| Accurate 3100 | <<locked>> | 90% | 38,130 psi | 60% | 2779 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 48,298 psi | 76% | 2933 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,898 psi | 58% | 2772 fps | 97% |
| ADI AR 2206H | <<locked>> | 80% | 53,911 psi | 84% | 3064 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,788 psi | 72% | 2900 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 92% | 46,659 psi | 73% | 2992 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,502 psi | 79% | 3127 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,151 psi | 72% | 2927 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,400 psi | 77% | 3002 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,955 psi | 56% | 2782 fps | 97% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,683 psi | 64% | 2917 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 46,180 psi | 72% | 2986 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 46,630 psi | 73% | 3038 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,036 psi | 44% | 2562 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 94% | 36,216 psi | 57% | 2815 fps | 95.5% |
| Alliant Reloder-26 | 75.1 gr | 86% | 34,780 psi | 55% | 2818 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,708 psi | 84% | 3077 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 45,774 psi | 72% | 3018 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 46,572 psi | 73% | 2940 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 46,630 psi | 73% | 3038 fps | 95.5% |
| Bofors RP7 | <<locked>> | 82% | 43,714 psi | 69% | 2854 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 46,949 psi | 74% | 2946 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 82% | 41,495 psi | 65% | 2884 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 82% | 44,556 psi | 70% | 2907 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,388 psi | 52% | 2667 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,227 psi | 80% | 3054 fps | 100% |
| Hodgdon Superformance | 75.6 gr | 84% | 43,729 psi | 69% | 2963 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,122 psi | 43% | 1752 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,895 psi | 81% | 3018 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,138 psi | 75% | 2940 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,372 psi | 79% | 2966 fps | 97.8% |
| IMR 4350 | <<locked>> | 84% | 41,582 psi | 65% | 2825 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,351 psi | 66% | 2828 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 35,375 psi | 55% | 2720 fps | 96.6% |
| IMR 4895 | <<locked>> | 80% | 50,691 psi | 79% | 3035 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,692 psi | 83% | 2986 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,283 psi | 76% | 2940 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,813 psi | 62% | 2772 fps | 96.5% |
| Lovex S070 | <<locked>> | 82% | 40,698 psi | 64% | 2808 fps | 95.6% |
| Lovex S071 | <<locked>> | 94% | 36,680 psi | 57% | 2743 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 52,504 psi | 82% | 3005 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,258 psi | 83% | 3005 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,762 psi | 76% | 2989 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 47,427 psi | 74% | 2986 fps | 95.3% |
| Norma MRP | <<locked>> | 92% | 42,815 psi | 67% | 2989 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 36,724 psi | 58% | 2766 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 80% | 49,052 psi | 77% | 3009 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 38,116 psi | 60% | 2808 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 98% | 43,410 psi | 68% | 2943 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,572 psi | 43% | 1791 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,949 psi | 74% | 2927 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,403 psi | 84% | 3130 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,236 psi | 68% | 2982 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,637 psi | 57% | 2785 fps | 96.6% |
| ReloadSwiss RS 70 | 69.2 gr | 80% | 35,650 psi | 56% | 2785 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 50,038 psi | 78% | 2953 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,816 psi | 69% | 2881 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 94% | 51,416 psi | 81% | 3031 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 92% | 45,208 psi | 71% | 2963 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 82% | 43,714 psi | 69% | 2854 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,813 psi | 62% | 2772 fps | 96.5% |
| Shooters World Precision | <<locked>> | 80% | 48,283 psi | 76% | 2940 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 40,698 psi | 64% | 2808 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,918 psi | 70% | 2936 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,344 psi | 82% | 3031 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,287 psi | 84% | 2936 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,034 psi | 71% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 41,684 psi | 65% | 2772 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 44,788 psi | 70% | 2959 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 53,040 psi | 83% | 2933 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,005 psi | 69% | 2877 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 33,083 psi | 52% | 2717 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 43,105 psi | 68% | 2887 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 53,824 psi | 84% | 2920 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,212 psi | 79% | 2920 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,633 psi | 79% | 2933 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,177 psi | 66% | 2808 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 38,101 psi | 60% | 2769 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 45,208 psi | 71% | 2917 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 48,907 psi | 77% | 2923 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,594 psi | 59% | 2769 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 82% | 30,951 psi | 49% | 2651 fps | 95.3% |
| Vihtavuori N560 | <<locked>> | 98% | 53,258 psi | 83% | 3176 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,304 psi | 58% | 2736 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 41,655 psi | 65% | 2887 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 86% | 28,355 psi | 44% | 2657 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,388 psi | 82% | 3038 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,672 psi | 72% | 2930 fps | 95% |
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 105 powders for .300 Weath. Mag. loaded with the .308 | 152gr | Lehigh Defense Controlled Chaos. Norma MRP delivers the highest muzzle velocity at 3,258 fps; across all powders the maximum-charge window runs from 1,959 fps to 3,258 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 152.0 gr projectile in 0.308" calls for a 1:12.0 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, Hodgdon Superformance rank at the top here: for .300 Weath. Mag. with the .308 | 152gr | Lehigh Defense Controlled Chaos 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.