Load Specifications
Load data in caliber .300 Weath. Mag. with .3085 | 150gr | Prvi Partizan FMJ bullet and 87 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.
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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% | 55,709 psi | 87% | 3025 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,043 psi | 89% | 3091 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,376 psi | 87% | 3133 fps | 99.3% |
| Accurate 4064 | <<locked>> | 84% | 56,289 psi | 88% | 3081 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,363 psi | 90% | 3192 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 56,217 psi | 88% | 3114 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,534 psi | 85% | 3169 fps | 97.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,999 psi | 88% | 3222 fps | 96.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,593 psi | 87% | 3238 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,058 psi | 89% | 3140 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,246 psi | 90% | 3159 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,259 psi | 85% | 3192 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,695 psi | 87% | 3219 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,522 psi | 90% | 3219 fps | 97.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,940 psi | 86% | 3215 fps | 97.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,938 psi | 81% | 3146 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,266 psi | 71% | 3061 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,101 psi | 88% | 3297 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,372 psi | 79% | 3130 fps | 96.4% |
| Bofors RP3 | <<locked>> | 84% | 54,476 psi | 85% | 3100 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,940 psi | 86% | 3215 fps | 97.6% |
| Bofors RP7 | <<locked>> | 90% | 57,246 psi | 90% | 3133 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 84% | 54,694 psi | 86% | 3110 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 90% | 55,724 psi | 87% | 3182 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 88% | 55,405 psi | 87% | 3140 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,607 psi | 86% | 3114 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,014 psi | 88% | 3156 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 56,072 psi | 88% | 3219 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,318 psi | 57% | 1982 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,536 psi | 89% | 3117 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,521 psi | 87% | 3094 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,694 psi | 86% | 3071 fps | 98.6% |
| IMR 4350 | <<locked>> | 92% | 54,911 psi | 86% | 3110 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,492 psi | 87% | 3107 fps | 98.6% |
| IMR 4831 | <<locked>> | 94% | 57,740 psi | 90% | 3179 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,042 psi | 86% | 3133 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,609 psi | 90% | 3153 fps | 96.1% |
| Lovex S060 | <<locked>> | 82% | 57,072 psi | 89% | 3084 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,854 psi | 88% | 3087 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,622 psi | 87% | 3107 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 57,087 psi | 89% | 3150 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,992 psi | 72% | 2963 fps | 97.9% |
| Norma 201 | <<locked>> | 82% | 57,029 psi | 89% | 3100 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,536 psi | 89% | 3146 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,680 psi | 87% | 3163 fps | 97.3% |
| Norma MRP | <<locked>> | 98% | 54,621 psi | 86% | 3241 fps | 98.7% |
| Norma URP | <<locked>> | 92% | 55,883 psi | 88% | 3173 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 57,595 psi | 90% | 3173 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,780 psi | 84% | 3205 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 92% | 54,636 psi | 86% | 3166 fps | 99.2% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,240 psi | 76% | 3068 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,072 psi | 58% | 2031 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,607 psi | 86% | 3094 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,013 psi | 86% | 3212 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 57,290 psi | 90% | 3212 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,651 psi | 87% | 3241 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,382 psi | 70% | 3074 fps | 96.6% |
| Rottweil R 902 | <<locked>> | 82% | 54,462 psi | 85% | 3051 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,520 psi | 85% | 3094 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,217 psi | 88% | 3140 fps | 96.4% |
| Rottweil R 905 | <<locked>> | 98% | 56,826 psi | 89% | 3205 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 90% | 57,246 psi | 90% | 3133 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,622 psi | 87% | 3107 fps | 99.5% |
| Shooters World Precision | <<locked>> | 84% | 55,854 psi | 88% | 3087 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,087 psi | 89% | 3150 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,101 psi | 88% | 3156 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,043 psi | 89% | 3130 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,477 psi | 87% | 2982 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,332 psi | 87% | 3054 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,347 psi | 88% | 3199 fps | 97.8% |
| Somchem S335 | <<locked>> | 82% | 57,421 psi | 90% | 3022 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 54,447 psi | 85% | 3091 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 55,434 psi | 87% | 3179 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,493 psi | 90% | 3176 fps | 98.6% |
| Vihtavuori N135 | <<locked>> | 82% | 54,679 psi | 86% | 3012 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,984 psi | 86% | 3025 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,898 psi | 88% | 3068 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,288 psi | 85% | 3107 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,200 psi | 83% | 3087 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 84% | 56,637 psi | 89% | 3068 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 57,203 psi | 90% | 3173 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 54,331 psi | 85% | 3176 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,056 psi | 85% | 3074 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,941 psi | 88% | 3189 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,036 psi | 74% | 3202 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,348 psi | 90% | 3140 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,998 psi | 85% | 3110 fps | 97.1% |
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% | 52,301 psi | 82% | 2972 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,980 psi | 78% | 2969 fps | 97.1% |
| Accurate 3100 | <<locked>> | 88% | 36,695 psi | 57% | 2759 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 49,559 psi | 78% | 2976 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,753 psi | 59% | 2812 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 80% | 46,615 psi | 73% | 2943 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 47,819 psi | 75% | 3041 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 98% | 52,243 psi | 82% | 3150 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,692 psi | 81% | 3173 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,253 psi | 74% | 2972 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,270 psi | 79% | 3041 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,753 psi | 58% | 2822 fps | 97.3% |
| Alliant Reloder-17 | 70.3 gr | 80% | 41,771 psi | 65% | 2963 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 47,369 psi | 74% | 3028 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 44,802 psi | 70% | 3018 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,776 psi | 45% | 2605 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 94% | 37,260 psi | 58% | 2864 fps | 96% |
| Alliant Reloder-26 | 75.7 gr | 84% | 33,330 psi | 52% | 2795 fps | 95.1% |
| Bofors RP15 | <<locked>> | 98% | 47,079 psi | 74% | 3064 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 47,645 psi | 75% | 2982 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 44,802 psi | 70% | 3018 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 41,771 psi | 65% | 2835 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 47,935 psi | 75% | 2989 fps | 99% |
| Hodgdon H414 | <<locked>> | 80% | 39,769 psi | 62% | 2861 fps | 95% |
| Hodgdon H4350 | <<locked>> | 82% | 45,585 psi | 71% | 2953 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,345 psi | 54% | 2710 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,272 psi | 82% | 3094 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 41,771 psi | 65% | 2936 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,195 psi | 43% | 1775 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,968 psi | 83% | 3061 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,037 psi | 77% | 2982 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,271 psi | 80% | 3009 fps | 98% |
| IMR 4350 | <<locked>> | 84% | 42,569 psi | 67% | 2871 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,105 psi | 68% | 2867 fps | 96% |
| IMR 4831 | <<locked>> | 80% | 36,303 psi | 57% | 2762 fps | 96.9% |
| IMR 4895 | <<locked>> | 80% | 51,590 psi | 81% | 3074 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,027 psi | 85% | 3091 fps | 95.3% |
| Lovex S060 | <<locked>> | 80% | 53,563 psi | 84% | 3025 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,226 psi | 77% | 2979 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,727 psi | 64% | 2815 fps | 96.9% |
| Lovex S070 | <<locked>> | 80% | 38,957 psi | 61% | 2789 fps | 95.1% |
| Lovex S071 | <<locked>> | 94% | 37,739 psi | 59% | 2789 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 53,650 psi | 84% | 3048 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,647 psi | 78% | 3028 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 48,689 psi | 76% | 3035 fps | 95.7% |
| Norma MRP | 78.7 gr | 90% | 41,191 psi | 65% | 2969 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 37,536 psi | 59% | 2808 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 80% | 50,154 psi | 79% | 3048 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 50,067 psi | 78% | 3133 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 82% | 39,117 psi | 61% | 2851 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 98% | 44,744 psi | 70% | 2995 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,615 psi | 43% | 1818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,834 psi | 75% | 2969 fps | 97.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,382 psi | 70% | 3025 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,695 psi | 59% | 2828 fps | 96.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,477 psi | 57% | 2828 fps | 96% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 41,292 psi | 65% | 2999 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 50,966 psi | 80% | 2995 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,730 psi | 70% | 2920 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 52,779 psi | 83% | 3077 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 92% | 46,499 psi | 73% | 3012 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 41,771 psi | 65% | 2835 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,727 psi | 64% | 2815 fps | 96.9% |
| Shooters World Precision | <<locked>> | 80% | 49,226 psi | 77% | 2979 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,957 psi | 61% | 2789 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,905 psi | 72% | 2976 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,301 psi | 84% | 3071 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,934 psi | 72% | 2831 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,900 psi | 63% | 2753 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 46,079 psi | 72% | 3005 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 54,143 psi | 85% | 2972 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,063 psi | 71% | 2923 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 34,069 psi | 53% | 2759 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 44,121 psi | 69% | 2930 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 51,329 psi | 80% | 2959 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,488 psi | 81% | 2972 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,018 psi | 67% | 2844 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,914 psi | 61% | 2808 fps | 97.5% |
| Vihtavuori N165 | <<locked>> | 94% | 43,584 psi | 68% | 2904 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 49,879 psi | 78% | 2963 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,479 psi | 60% | 2808 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 31,879 psi | 50% | 2690 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,130 psi | 60% | 2776 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 39,943 psi | 63% | 2864 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 27,282 psi | 43% | 2631 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,534 psi | 84% | 3077 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,920 psi | 74% | 2979 fps | 95.4% |
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 99 powders for .300 Weath. Mag. loaded with the .3085 | 150gr | Prvi Partizan FMJ. Alliant Reloder-26 delivers the highest muzzle velocity at 3,297 fps; across all powders the maximum-charge window runs from 1,982 fps to 3,297 fps. Accurate 3100 gives the best case fill at 100 %, and 99 of the 99 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 150.0 gr projectile in 0.3085" calls for a 1:14.5 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, Alliant Reloder-17, Norma MRP rank at the top here: for .300 Weath. Mag. with the .3085 | 150gr | Prvi Partizan FMJ 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.