Load Specifications
Load data in caliber .300 Weath. Mag. with .3085 | 150gr | Prvi Partizan SP bullet and 85 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.
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% | 56,159 psi | 88% | 3031 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,392 psi | 90% | 3100 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,086 psi | 88% | 3143 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 56,739 psi | 89% | 3091 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,099 psi | 85% | 3140 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 56,608 psi | 89% | 3123 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,245 psi | 87% | 3182 fps | 97.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,608 psi | 89% | 3235 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,231 psi | 88% | 3251 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,435 psi | 90% | 3146 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,667 psi | 90% | 3169 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,868 psi | 86% | 3202 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,304 psi | 88% | 3228 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,549 psi | 85% | 3166 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,695 psi | 87% | 3228 fps | 97.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,460 psi | 82% | 3156 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,643 psi | 72% | 3071 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,884 psi | 89% | 3310 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,068 psi | 80% | 3143 fps | 96.7% |
| Bofors RP3 | <<locked>> | 84% | 54,897 psi | 86% | 3110 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,695 psi | 87% | 3228 fps | 97.8% |
| Bofors RP7 | <<locked>> | 88% | 54,375 psi | 85% | 3087 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 84% | 55,259 psi | 87% | 3123 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 56,275 psi | 88% | 3196 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 88% | 55,767 psi | 87% | 3150 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,201 psi | 87% | 3123 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,405 psi | 88% | 3163 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 56,840 psi | 89% | 3232 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,419 psi | 57% | 1988 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,913 psi | 89% | 3127 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,115 psi | 88% | 3107 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,013 psi | 86% | 3081 fps | 98.7% |
| IMR 4350 | <<locked>> | 92% | 55,405 psi | 87% | 3123 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,796 psi | 87% | 3117 fps | 98.7% |
| IMR 4831 | <<locked>> | 92% | 54,578 psi | 86% | 3133 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 55,709 psi | 87% | 3146 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 57,464 psi | 90% | 3091 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 56,275 psi | 88% | 3097 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,159 psi | 88% | 3117 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 57,624 psi | 90% | 3163 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,499 psi | 73% | 2976 fps | 98% |
| Norma 201 | <<locked>> | 82% | 57,435 psi | 90% | 3107 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,956 psi | 89% | 3153 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,202 psi | 88% | 3173 fps | 97.5% |
| Norma MRP | <<locked>> | 98% | 55,376 psi | 87% | 3258 fps | 98.8% |
| Norma URP | <<locked>> | 92% | 56,463 psi | 88% | 3186 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,331 psi | 85% | 3123 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,462 psi | 85% | 3219 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 92% | 55,187 psi | 86% | 3176 fps | 99.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,820 psi | 77% | 3081 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,014 psi | 58% | 2034 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,129 psi | 86% | 3104 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,651 psi | 87% | 3222 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,143 psi | 85% | 3163 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,362 psi | 88% | 3255 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,860 psi | 70% | 3091 fps | 96.9% |
| Rottweil R 902 | <<locked>> | 82% | 54,868 psi | 86% | 3061 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,955 psi | 86% | 3104 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,681 psi | 89% | 3150 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 98% | 57,580 psi | 90% | 3219 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 88% | 54,375 psi | 85% | 3087 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,159 psi | 88% | 3117 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 56,275 psi | 88% | 3097 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,624 psi | 90% | 3163 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,623 psi | 89% | 3166 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,406 psi | 90% | 3140 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,840 psi | 88% | 2989 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,840 psi | 88% | 3064 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,087 psi | 89% | 3212 fps | 98% |
| Somchem S355 | <<locked>> | 86% | 55,013 psi | 86% | 3100 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 56,043 psi | 88% | 3186 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,520 psi | 85% | 3130 fps | 98.2% |
| Vihtavuori N135 | <<locked>> | 82% | 55,172 psi | 86% | 3018 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,376 psi | 87% | 3031 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,260 psi | 88% | 3074 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,824 psi | 86% | 3120 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,838 psi | 84% | 3100 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 57,203 psi | 90% | 3077 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 57,711 psi | 90% | 3182 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,158 psi | 86% | 3189 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,563 psi | 86% | 3081 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,492 psi | 89% | 3199 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,877 psi | 75% | 3219 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,711 psi | 90% | 3146 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,679 psi | 86% | 3120 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% | 52,779 psi | 83% | 2979 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,299 psi | 79% | 2979 fps | 97.2% |
| Accurate 3100 | <<locked>> | 88% | 37,014 psi | 58% | 2769 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 50,009 psi | 78% | 2986 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,319 psi | 60% | 2825 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 80% | 47,007 psi | 74% | 2953 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 48,298 psi | 76% | 3051 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 98% | 52,924 psi | 83% | 3166 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,330 psi | 82% | 3186 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,659 psi | 75% | 2979 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,879 psi | 80% | 3054 fps | 99.9% |
| Alliant Reloder-16 | 65.9 gr | 80% | 37,115 psi | 58% | 2835 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,293 psi | 66% | 2972 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 47,848 psi | 75% | 3041 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 45,455 psi | 71% | 3035 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 82% | 29,066 psi | 46% | 2615 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 92% | 35,302 psi | 55% | 2812 fps | 95.1% |
| Alliant Reloder-26 | 76.4 gr | 84% | 33,765 psi | 53% | 2808 fps | 95.4% |
| Bofors RP15 | <<locked>> | 98% | 47,747 psi | 75% | 3077 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 48,051 psi | 75% | 2989 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 45,455 psi | 71% | 3035 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 42,119 psi | 66% | 2844 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 48,298 psi | 76% | 2999 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 40,147 psi | 63% | 2871 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 82% | 45,963 psi | 72% | 2963 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,737 psi | 54% | 2720 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,881 psi | 83% | 3104 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 42,235 psi | 66% | 2949 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,209 psi | 43% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,374 psi | 84% | 3068 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,443 psi | 77% | 2992 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,648 psi | 81% | 3018 fps | 98.2% |
| IMR 4350 | <<locked>> | 84% | 43,076 psi | 68% | 2884 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,627 psi | 68% | 2881 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 36,709 psi | 58% | 2772 fps | 97.1% |
| IMR 4895 | <<locked>> | 80% | 52,214 psi | 82% | 3084 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 53,969 psi | 85% | 3035 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,661 psi | 78% | 2989 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,089 psi | 64% | 2825 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 39,305 psi | 62% | 2799 fps | 95.2% |
| Lovex S071 | <<locked>> | 94% | 38,261 psi | 60% | 2802 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 54,070 psi | 85% | 3054 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,241 psi | 79% | 3038 fps | 100% |
| Norma 204 | <<locked>> | 88% | 49,197 psi | 77% | 3048 fps | 95.9% |
| Norma MRP | 79.4 gr | 90% | 41,655 psi | 65% | 2979 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 37,942 psi | 59% | 2815 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 80% | 50,749 psi | 80% | 3064 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 50,734 psi | 80% | 3146 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 36,912 psi | 58% | 2799 fps | 95% |
| Ramshot Magnum | <<locked>> | 98% | 45,281 psi | 71% | 3009 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 43% | 1821 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,385 psi | 76% | 2982 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,933 psi | 70% | 3035 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,058 psi | 60% | 2838 fps | 97.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,927 psi | 58% | 2841 fps | 96.3% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 41,771 psi | 65% | 3012 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 51,416 psi | 81% | 3005 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,136 psi | 71% | 2930 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 49,922 psi | 78% | 3028 fps | 95% |
| Rottweil R 905 | <<locked>> | 92% | 46,978 psi | 74% | 3025 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 42,119 psi | 66% | 2844 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,089 psi | 64% | 2825 fps | 97% |
| Shooters World Precision | <<locked>> | 80% | 49,661 psi | 78% | 2989 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,305 psi | 62% | 2799 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,456 psi | 73% | 2986 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,882 psi | 84% | 3081 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,354 psi | 73% | 2841 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,234 psi | 63% | 2762 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 46,586 psi | 73% | 3018 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 45,469 psi | 71% | 2933 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 34,447 psi | 54% | 2769 fps | 99.1% |
| Somchem S385 | <<locked>> | 88% | 41,756 psi | 65% | 2877 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 51,808 psi | 81% | 2969 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,953 psi | 81% | 2979 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,395 psi | 68% | 2854 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,421 psi | 62% | 2822 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 94% | 44,019 psi | 69% | 2917 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 50,256 psi | 79% | 2969 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,827 psi | 61% | 2818 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 32,271 psi | 51% | 2703 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,551 psi | 60% | 2785 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 40,277 psi | 63% | 2874 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 84% | 27,630 psi | 43% | 2648 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,925 psi | 85% | 3087 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 47,398 psi | 74% | 2989 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 98 powders for .300 Weath. Mag. loaded with the .3085 | 150gr | Prvi Partizan SP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,310 fps; across all powders the maximum-charge window runs from 1,988 fps to 3,310 fps. Accurate 3100 gives the best case fill at 100 %, and 98 of the 98 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 0.3085" 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 .3085 | 150gr | Prvi Partizan SP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2225, Baschieri & Pellagri 109 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.