Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 150gr | TWENTY-NINE ERTP bullet and 92 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-16 and Alliant Reloder-26.
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>> | 84% | 57,508 psi | 90% | 3045 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,187 psi | 86% | 3051 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,881 psi | 83% | 3084 fps | 98.9% |
| Accurate 4064 | <<locked>> | 86% | 57,638 psi | 90% | 3097 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,926 psi | 86% | 3150 fps | 99.9% |
| Accurate High Country | <<locked>> | 98% | 53,896 psi | 84% | 3225 fps | 96% |
| ADI AR 2206H | <<locked>> | 82% | 56,579 psi | 89% | 3127 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 54,360 psi | 85% | 3074 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 55,970 psi | 88% | 3186 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 57,479 psi | 90% | 3268 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 56,159 psi | 88% | 3182 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,056 psi | 86% | 3100 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,274 psi | 87% | 3123 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,506 psi | 87% | 3209 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,956 psi | 89% | 3235 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,361 psi | 87% | 3173 fps | 97.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,605 psi | 82% | 3169 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,458 psi | 78% | 3104 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,105 psi | 68% | 3005 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,174 psi | 90% | 3314 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,826 psi | 89% | 3146 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 55,999 psi | 88% | 3117 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,605 psi | 82% | 3169 fps | 96.9% |
| Bofors RP7 | <<locked>> | 90% | 55,332 psi | 87% | 3094 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 86% | 56,521 psi | 89% | 3133 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 57,116 psi | 90% | 3199 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 90% | 56,971 psi | 89% | 3159 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 82% | 57,246 psi | 90% | 3136 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,927 psi | 88% | 3127 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,012 psi | 85% | 3117 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 53,650 psi | 84% | 3173 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,318 psi | 57% | 1969 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,766 psi | 86% | 3084 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 57,246 psi | 90% | 3114 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,507 psi | 89% | 3094 fps | 98.7% |
| IMR 4350 | <<locked>> | 94% | 56,333 psi | 88% | 3127 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,043 psi | 89% | 3123 fps | 98.7% |
| IMR 4831 | <<locked>> | 94% | 55,303 psi | 87% | 3140 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 56,681 psi | 89% | 3153 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 57,101 psi | 89% | 3097 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,361 psi | 87% | 3048 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,551 psi | 90% | 3110 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,159 psi | 90% | 3123 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 54,998 psi | 86% | 3107 fps | 98.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,816 psi | 69% | 2917 fps | 97.2% |
| Norma 201 | <<locked>> | 82% | 55,405 psi | 87% | 3068 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,956 psi | 88% | 3064 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,563 psi | 86% | 3107 fps | 100% |
| Norma 204 | <<locked>> | 94% | 57,363 psi | 90% | 3182 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 55,898 psi | 88% | 3261 fps | 98.7% |
| Norma URP | <<locked>> | 94% | 57,276 psi | 90% | 3189 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 55,521 psi | 87% | 3133 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 56,086 psi | 88% | 3186 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,912 psi | 58% | 2014 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,507 psi | 89% | 3117 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,362 psi | 88% | 3199 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,666 psi | 89% | 3235 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,897 psi | 86% | 3169 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,334 psi | 90% | 3261 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 56,014 psi | 88% | 3071 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,057 psi | 88% | 3114 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,682 psi | 90% | 3153 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 98% | 54,534 psi | 85% | 3156 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 90% | 55,332 psi | 87% | 3094 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,159 psi | 90% | 3123 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 57,101 psi | 89% | 3097 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,551 psi | 90% | 3110 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,998 psi | 86% | 3107 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,012 psi | 85% | 3117 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,158 psi | 86% | 3094 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,072 psi | 88% | 2995 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 57,072 psi | 89% | 2999 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,116 psi | 90% | 3071 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,041 psi | 85% | 3150 fps | 97.1% |
| Somchem S335 | <<locked>> | 82% | 55,898 psi | 88% | 2995 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,956 psi | 88% | 3107 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 56,449 psi | 88% | 3189 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,143 psi | 86% | 3130 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 82% | 56,579 psi | 89% | 2979 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,159 psi | 88% | 3028 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,681 psi | 89% | 3045 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,435 psi | 90% | 3084 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,825 psi | 87% | 3127 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,952 psi | 80% | 3041 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 84% | 54,853 psi | 86% | 3035 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,911 psi | 86% | 3127 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,463 psi | 87% | 3192 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,680 psi | 87% | 3094 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,348 psi | 90% | 3202 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,788 psi | 70% | 3153 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,230 psi | 87% | 3100 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,463 psi | 87% | 3127 fps | 97.2% |
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% | 50,430 psi | 79% | 2940 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,269 psi | 76% | 2927 fps | 96.5% |
| Accurate 3100 | <<locked>> | 90% | 37,420 psi | 59% | 2776 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 47,761 psi | 75% | 2940 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,172 psi | 57% | 2769 fps | 96.6% |
| Accurate High Country | <<locked>> | 96% | 50,183 psi | 79% | 3156 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 53,127 psi | 83% | 3068 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,136 psi | 71% | 2907 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 94% | 49,066 psi | 77% | 3058 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,676 psi | 78% | 3130 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 49,124 psi | 77% | 3058 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,455 psi | 71% | 2933 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,675 psi | 76% | 3005 fps | 99.6% |
| Alliant Reloder-16 | 63 gr | 80% | 35,404 psi | 55% | 2782 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,147 psi | 63% | 2920 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 48,486 psi | 76% | 3045 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 45,890 psi | 72% | 3035 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 84% | 29,530 psi | 46% | 2625 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 96% | 37,971 psi | 60% | 2877 fps | 96% |
| Alliant Reloder-26 | 74.8 gr | 86% | 34,200 psi | 54% | 2818 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,997 psi | 83% | 3081 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 45,803 psi | 72% | 2943 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 45,890 psi | 72% | 3035 fps | 95.1% |
| Bofors RP7 | <<locked>> | 82% | 43,091 psi | 68% | 2858 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 46,253 psi | 72% | 2949 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 82% | 40,828 psi | 64% | 2881 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 84% | 46,963 psi | 74% | 2972 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 53,722 psi | 84% | 3081 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,909 psi | 52% | 2671 fps | 97.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,444 psi | 79% | 3058 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 43,047 psi | 67% | 2959 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 42% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,387 psi | 81% | 3025 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,471 psi | 74% | 2946 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,705 psi | 78% | 2972 fps | 97.6% |
| IMR 4350 | <<locked>> | 86% | 43,845 psi | 69% | 2890 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,771 psi | 65% | 2828 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 34,896 psi | 55% | 2720 fps | 96.2% |
| IMR 4895 | <<locked>> | 80% | 49,922 psi | 78% | 3038 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 53,519 psi | 84% | 3045 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,011 psi | 82% | 2992 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,601 psi | 75% | 2943 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,392 psi | 62% | 2776 fps | 96.2% |
| Lovex S070 | <<locked>> | 82% | 40,089 psi | 63% | 2812 fps | 95.2% |
| Lovex S071 | <<locked>> | 96% | 38,392 psi | 60% | 2799 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 51,967 psi | 81% | 3015 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,489 psi | 82% | 3009 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,022 psi | 75% | 2992 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 50,111 psi | 79% | 3054 fps | 95.8% |
| Norma MRP | <<locked>> | 92% | 42,105 psi | 66% | 2986 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 36,085 psi | 57% | 2766 fps | 96.4% |
| Ramshot Big Game | <<locked>> | 80% | 48,298 psi | 76% | 3009 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 37,507 psi | 59% | 2808 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,485 psi | 43% | 1801 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,311 psi | 73% | 2933 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,533 psi | 82% | 3130 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,670 psi | 67% | 2989 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,955 psi | 56% | 2785 fps | 96.1% |
| ReloadSwiss RS 70 | 68.9 gr | 80% | 35,056 psi | 55% | 2782 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 49,545 psi | 78% | 2963 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,120 psi | 68% | 2884 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 96% | 54,070 psi | 85% | 3094 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 94% | 47,514 psi | 74% | 3028 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 82% | 43,091 psi | 68% | 2858 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,392 psi | 62% | 2776 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,519 psi | 84% | 3045 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,601 psi | 75% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 40,089 psi | 63% | 2812 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,208 psi | 69% | 2936 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,648 psi | 81% | 3035 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,794 psi | 83% | 2946 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,556 psi | 70% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 41,234 psi | 65% | 2776 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 47,079 psi | 74% | 3018 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 52,562 psi | 82% | 2946 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,497 psi | 68% | 2884 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 32,605 psi | 51% | 2717 fps | 98.5% |
| Somchem S385 | <<locked>> | 90% | 42,395 psi | 66% | 2887 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 53,301 psi | 84% | 2933 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,647 psi | 78% | 2930 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,893 psi | 78% | 2940 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,510 psi | 65% | 2808 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 37,449 psi | 59% | 2769 fps | 96.9% |
| Vihtavuori N165 | <<locked>> | 96% | 44,498 psi | 70% | 2917 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 48,240 psi | 76% | 2927 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,970 psi | 58% | 2769 fps | 96.5% |
| Vihtavuori N555 | <<locked>> | 84% | 32,489 psi | 51% | 2707 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,724 psi | 58% | 2736 fps | 98.8% |
| Winchester 760 | <<locked>> | 82% | 40,959 psi | 64% | 2884 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,862 psi | 44% | 2651 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,663 psi | 81% | 3041 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 48,153 psi | 75% | 2995 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 92 powders for .300 Weath. Mag. loaded with the .308 | 150gr | TWENTY-NINE ERTP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,314 fps; across all powders the maximum-charge window runs from 1,969 fps to 3,314 fps. Accurate 3100 gives the best case fill at 100 %, and 92 of the 92 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 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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-16, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .308 | 150gr | TWENTY-NINE ERTP 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.