Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 150gr | Nosler Ballistic Silver Tip bullet and 86 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.
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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% | 56,362 psi | 88% | 3035 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,508 psi | 90% | 3104 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,231 psi | 88% | 3146 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 56,913 psi | 89% | 3094 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,244 psi | 85% | 3143 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 56,753 psi | 89% | 3123 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,347 psi | 87% | 3189 fps | 97.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,739 psi | 89% | 3238 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,391 psi | 88% | 3255 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,595 psi | 90% | 3150 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,244 psi | 85% | 3114 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,013 psi | 86% | 3205 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,449 psi | 88% | 3232 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,679 psi | 86% | 3169 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3235 fps | 97.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,837 psi | 83% | 3163 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,948 psi | 72% | 3077 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,985 psi | 89% | 3314 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,155 psi | 80% | 3146 fps | 96.7% |
| Bofors RP3 | <<locked>> | 84% | 55,056 psi | 86% | 3110 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3235 fps | 97.8% |
| Bofors RP7 | <<locked>> | 88% | 54,534 psi | 85% | 3091 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 84% | 55,405 psi | 87% | 3127 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 56,391 psi | 88% | 3199 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 55,898 psi | 88% | 3153 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,332 psi | 87% | 3127 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,565 psi | 89% | 3166 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 56,942 psi | 89% | 3235 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,477 psi | 57% | 1991 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,072 psi | 89% | 3130 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,275 psi | 88% | 3107 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,158 psi | 86% | 3084 fps | 98.7% |
| IMR 4350 | <<locked>> | 92% | 55,550 psi | 87% | 3127 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,912 psi | 88% | 3117 fps | 98.8% |
| IMR 4831 | <<locked>> | 92% | 54,737 psi | 86% | 3136 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 55,666 psi | 87% | 3146 fps | 100% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,172 psi | 85% | 3205 fps | 96% |
| Lovex S060 | <<locked>> | 82% | 57,624 psi | 90% | 3094 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 56,434 psi | 88% | 3100 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,275 psi | 88% | 3120 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 57,740 psi | 90% | 3166 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,586 psi | 73% | 2979 fps | 98.1% |
| Norma 201 | <<locked>> | 82% | 57,609 psi | 90% | 3114 fps | 100% |
| Norma 203B | <<locked>> | 84% | 57,116 psi | 90% | 3156 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,507 psi | 89% | 3182 fps | 97.6% |
| Norma MRP | <<locked>> | 98% | 55,535 psi | 87% | 3261 fps | 98.9% |
| Norma URP | <<locked>> | 92% | 56,652 psi | 89% | 3186 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,476 psi | 85% | 3127 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,810 psi | 86% | 3228 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 92% | 55,535 psi | 87% | 3182 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,965 psi | 77% | 3084 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,057 psi | 58% | 2034 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,259 psi | 87% | 3107 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,796 psi | 87% | 3225 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,259 psi | 85% | 3166 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,521 psi | 89% | 3258 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,092 psi | 71% | 3094 fps | 97% |
| Rottweil R 902 | <<locked>> | 82% | 54,998 psi | 86% | 3061 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,114 psi | 86% | 3107 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,014 psi | 89% | 3156 fps | 96.7% |
| Rottweil R 905 | <<locked>> | 98% | 57,740 psi | 90% | 3222 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 88% | 54,534 psi | 85% | 3091 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,275 psi | 88% | 3120 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 56,434 psi | 88% | 3100 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,740 psi | 90% | 3166 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,768 psi | 89% | 3169 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,551 psi | 90% | 3143 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,999 psi | 88% | 2992 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,941 psi | 88% | 3068 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,246 psi | 90% | 3215 fps | 98% |
| Somchem S355 | <<locked>> | 86% | 55,158 psi | 86% | 3104 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 56,173 psi | 88% | 3189 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,679 psi | 86% | 3133 fps | 98.3% |
| Vihtavuori N135 | <<locked>> | 82% | 55,361 psi | 87% | 3022 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,535 psi | 87% | 3035 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,391 psi | 88% | 3077 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,984 psi | 86% | 3123 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,983 psi | 85% | 3104 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 57,348 psi | 90% | 3081 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,259 psi | 85% | 3127 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 98% | 55,303 psi | 87% | 3192 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,680 psi | 87% | 3248 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,679 psi | 86% | 3084 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,608 psi | 89% | 3202 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,298 psi | 76% | 3225 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,781 psi | 86% | 3123 fps | 97.4% |
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% | 52,953 psi | 83% | 2982 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,444 psi | 79% | 2982 fps | 97.3% |
| Accurate 3100 | <<locked>> | 88% | 37,130 psi | 58% | 2772 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 50,154 psi | 79% | 2989 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,305 psi | 60% | 2828 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 80% | 47,166 psi | 74% | 2956 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 92% | 48,457 psi | 76% | 3058 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 98% | 52,982 psi | 83% | 3169 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,489 psi | 82% | 3189 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,630 psi | 75% | 2979 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,836 psi | 80% | 3054 fps | 99.9% |
| Alliant Reloder-16 | 66.1 gr | 80% | 37,275 psi | 58% | 2838 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,438 psi | 67% | 2979 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 90% | 44,947 psi | 70% | 2982 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 94% | 45,556 psi | 71% | 3038 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 82% | 29,167 psi | 46% | 2621 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 92% | 35,375 psi | 55% | 2812 fps | 95.2% |
| Alliant Reloder-26 | 76.6 gr | 84% | 33,852 psi | 53% | 2812 fps | 95.4% |
| Bofors RP15 | <<locked>> | 98% | 47,834 psi | 75% | 3081 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 48,211 psi | 76% | 2995 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 45,556 psi | 71% | 3038 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 42,264 psi | 66% | 2848 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 48,457 psi | 76% | 3002 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 40,292 psi | 63% | 2874 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 82% | 46,108 psi | 72% | 2966 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,722 psi | 54% | 2723 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,040 psi | 83% | 3110 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 42,337 psi | 66% | 2953 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 43% | 1781 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,534 psi | 84% | 3071 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,617 psi | 78% | 2995 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,764 psi | 81% | 3022 fps | 98.2% |
| IMR 4350 | <<locked>> | 84% | 43,207 psi | 68% | 2887 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,598 psi | 68% | 2881 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 36,811 psi | 58% | 2776 fps | 97.2% |
| IMR 4895 | <<locked>> | 80% | 52,170 psi | 82% | 3087 fps | 100% |
| IMR 7828 SSC | <<locked>> | 98% | 50,647 psi | 79% | 3140 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 54,128 psi | 85% | 3038 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,835 psi | 78% | 2992 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,234 psi | 65% | 2828 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 39,450 psi | 62% | 2805 fps | 95.3% |
| Lovex S071 | <<locked>> | 94% | 38,363 psi | 60% | 2802 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 54,259 psi | 85% | 3058 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,212 psi | 79% | 3041 fps | 100% |
| Norma 204 | <<locked>> | 86% | 45,948 psi | 72% | 2982 fps | 95% |
| Norma MRP | 79.6 gr | 90% | 41,756 psi | 65% | 2982 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 38,058 psi | 60% | 2822 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 80% | 50,894 psi | 80% | 3064 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 50,792 psi | 80% | 3150 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 37,043 psi | 58% | 2805 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 98% | 45,353 psi | 71% | 3012 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,717 psi | 43% | 1824 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,530 psi | 76% | 2986 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,092 psi | 71% | 3041 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,189 psi | 60% | 2841 fps | 97.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,028 psi | 58% | 2848 fps | 96.3% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 41,829 psi | 66% | 3015 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 51,590 psi | 81% | 3009 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,310 psi | 71% | 2936 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 50,024 psi | 78% | 3031 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 92% | 47,123 psi | 74% | 3028 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 42,264 psi | 66% | 2848 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,234 psi | 65% | 2828 fps | 97.1% |
| Shooters World Precision | <<locked>> | 80% | 49,835 psi | 78% | 2992 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,450 psi | 62% | 2805 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,601 psi | 73% | 2992 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,041 psi | 85% | 3087 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,485 psi | 73% | 2844 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,350 psi | 63% | 2769 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 46,702 psi | 73% | 3022 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 45,614 psi | 71% | 2933 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 34,606 psi | 54% | 2772 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 41,872 psi | 66% | 2884 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 52,011 psi | 82% | 2972 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,069 psi | 82% | 2982 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,540 psi | 68% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,421 psi | 62% | 2822 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 94% | 44,164 psi | 69% | 2920 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 50,372 psi | 79% | 2972 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,957 psi | 61% | 2822 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 82% | 32,416 psi | 51% | 2707 fps | 96% |
| Vihtavuori N560 | <<locked>> | 96% | 52,069 psi | 82% | 3179 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,667 psi | 61% | 2789 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 40,422 psi | 63% | 2877 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 27,702 psi | 43% | 2651 fps | 95.6% |
| Winchester Supreme 780 | <<locked>> | 94% | 47,485 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 97 powders for .300 Weath. Mag. loaded with the .308 | 150gr | Nosler Ballistic Silver Tip. Alliant Reloder-26 delivers the highest muzzle velocity at 3,314 fps; across all powders the maximum-charge window runs from 1,991 fps to 3,314 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 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, ADI AR 2225 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 | Nosler Ballistic Silver Tip 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.