Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 165gr | Reichenberg Spezial Jagd bullet and 87 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and ReloadSwiss RS 70.
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 2700 | <<locked>> | 82% | 55,637 psi | 87% | 2956 fps | 98.9% |
| Accurate 3100 | <<locked>> | 98% | 54,781 psi | 86% | 3009 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 54,853 psi | 86% | 2936 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,637 psi | 89% | 3058 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 57,566 psi | 90% | 3163 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 84% | 55,056 psi | 86% | 2976 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,667 psi | 90% | 3107 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 98% | 55,492 psi | 87% | 3104 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,188 psi | 88% | 2999 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,115 psi | 88% | 3018 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,522 psi | 90% | 3117 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,042 psi | 86% | 3077 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,116 psi | 90% | 3094 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,810 psi | 86% | 3097 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,419 psi | 87% | 3074 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,921 psi | 75% | 3005 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,912 psi | 88% | 3166 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,548 psi | 84% | 3074 fps | 98.1% |
| Bofors RP3 | <<locked>> | 84% | 57,029 psi | 89% | 3015 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 54,810 psi | 86% | 3097 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 56,246 psi | 88% | 3002 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,485 psi | 74% | 2946 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 84% | 57,217 psi | 90% | 3031 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,013 psi | 86% | 3054 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 86% | 54,549 psi | 85% | 3012 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 55,521 psi | 87% | 3041 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,433 psi | 85% | 3025 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,740 psi | 90% | 3035 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,891 psi | 73% | 3045 fps | 97.6% |
| Hodgdon Superformance | <<locked>> | 88% | 55,492 psi | 87% | 3091 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,564 psi | 57% | 1903 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,491 psi | 85% | 2956 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,971 psi | 89% | 2995 fps | 99.5% |
| IMR 4350 | <<locked>> | 92% | 57,667 psi | 90% | 3041 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,418 psi | 85% | 2976 fps | 99.2% |
| IMR 4831 | <<locked>> | 92% | 56,956 psi | 89% | 3045 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,624 psi | 90% | 3048 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,710 psi | 89% | 3028 fps | 97.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,652 psi | 89% | 3136 fps | 97.7% |
| Lovex S062 | <<locked>> | 82% | 54,781 psi | 86% | 2949 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,679 psi | 86% | 2972 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 56,014 psi | 88% | 3015 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,544 psi | 76% | 2904 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 55,419 psi | 87% | 3005 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,911 psi | 86% | 3038 fps | 98.1% |
| Norma MRP | <<locked>> | 96% | 54,462 psi | 85% | 3120 fps | 99.3% |
| Norma URP | <<locked>> | 90% | 55,143 psi | 86% | 3038 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,550 psi | 89% | 3031 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,609 psi | 90% | 3163 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 54,056 psi | 85% | 3038 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,416 psi | 81% | 3022 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,159 psi | 58% | 1946 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,101 psi | 89% | 3018 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,578 psi | 86% | 3071 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,768 psi | 89% | 3081 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,187 psi | 86% | 3110 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,094 psi | 74% | 3041 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 82% | 56,608 psi | 89% | 2959 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,130 psi | 90% | 3012 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,550 psi | 87% | 3018 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 96% | 56,449 psi | 88% | 3081 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 88% | 56,246 psi | 88% | 3002 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,679 psi | 86% | 2972 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 54,781 psi | 86% | 2949 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,014 psi | 88% | 3015 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,230 psi | 87% | 3018 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,331 psi | 85% | 2841 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,725 psi | 90% | 2979 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,970 psi | 88% | 3074 fps | 98.6% |
| Somchem S355 | <<locked>> | 86% | 56,898 psi | 89% | 3005 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,435 psi | 90% | 3012 fps | 97% |
| Somchem S365 | <<locked>> | 92% | 54,984 psi | 86% | 3041 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,014 psi | 89% | 3051 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 82% | 57,145 psi | 90% | 2917 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,406 psi | 90% | 2933 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,752 psi | 86% | 2927 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,392 psi | 90% | 3035 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,318 psi | 88% | 3028 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 55,448 psi | 87% | 2927 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,376 psi | 88% | 3038 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,070 psi | 85% | 3048 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,549 psi | 85% | 3110 fps | 96.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,995 psi | 78% | 3009 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,116 psi | 90% | 2999 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,230 psi | 87% | 3058 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,909 psi | 81% | 3150 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,203 psi | 90% | 3048 fps | 98.6% |
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 2700 | <<locked>> | 80% | 52,127 psi | 82% | 2900 fps | 98.4% |
| Accurate 3100 | <<locked>> | 84% | 33,460 psi | 52% | 2579 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 51,503 psi | 81% | 2884 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,813 psi | 62% | 2753 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 96% | 53,476 psi | 84% | 3091 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 48,675 psi | 76% | 2864 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 44,135 psi | 69% | 2858 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 94% | 48,312 psi | 76% | 2969 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,414 psi | 77% | 2890 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,779 psi | 83% | 2966 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,624 psi | 61% | 2762 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,208 psi | 69% | 2894 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 43,903 psi | 69% | 2848 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 90% | 41,553 psi | 65% | 2841 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,210 psi | 44% | 2497 fps | 96.6% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,213 psi | 50% | 2625 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 82% | 32,721 psi | 51% | 2680 fps | 96.2% |
| Bofors RP15 | <<locked>> | 94% | 43,918 psi | 69% | 2890 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 49,835 psi | 78% | 2904 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 41,553 psi | 65% | 2841 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 43,511 psi | 68% | 2769 fps | 96.8% |
| Hodgdon H1000 | <<locked>> | 98% | 44,280 psi | 69% | 2877 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 50,096 psi | 79% | 2917 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 41,858 psi | 66% | 2802 fps | 96.9% |
| Hodgdon H4350 | <<locked>> | 80% | 44,744 psi | 70% | 2828 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 94% | 51,808 psi | 81% | 2979 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 50,778 psi | 80% | 2963 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,187 psi | 57% | 2648 fps | 99.2% |
| Hodgdon Retumbo | <<locked>> | 96% | 40,930 psi | 64% | 2904 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 41,002 psi | 64% | 2815 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,209 psi | 43% | 1699 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,213 psi | 80% | 2904 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,417 psi | 84% | 2936 fps | 99.1% |
| IMR 4350 | <<locked>> | 80% | 39,189 psi | 61% | 2690 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,121 psi | 71% | 2805 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 38,116 psi | 60% | 2697 fps | 98.4% |
| IMR 4895 | <<locked>> | 80% | 54,172 psi | 85% | 2995 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,009 psi | 78% | 2913 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 94% | 46,166 psi | 72% | 2940 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 51,314 psi | 80% | 2894 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,424 psi | 66% | 2746 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 40,611 psi | 64% | 2723 fps | 96.8% |
| Lovex S071 | <<locked>> | 90% | 34,766 psi | 54% | 2612 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 52,098 psi | 82% | 2949 fps | 100% |
| Norma 204 | <<locked>> | 84% | 44,599 psi | 70% | 2844 fps | 95.8% |
| Norma MRP | 75.3 gr | 86% | 37,855 psi | 59% | 2782 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 39,450 psi | 62% | 2743 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 80% | 52,736 psi | 83% | 2972 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,108 psi | 72% | 2949 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 38,334 psi | 60% | 2730 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 94% | 40,930 psi | 64% | 2815 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,818 psi | 44% | 1742 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,140 psi | 79% | 2900 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,992 psi | 74% | 2949 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,784 psi | 62% | 2769 fps | 98.4% |
| ReloadSwiss RS 70 | 71.5 gr | 80% | 38,363 psi | 60% | 2776 fps | 97.9% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 37,826 psi | 59% | 2815 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 52,997 psi | 83% | 2907 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,775 psi | 73% | 2841 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,600 psi | 71% | 2835 fps | 95% |
| Rottweil R 905 | <<locked>> | 88% | 42,931 psi | 67% | 2828 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 43,511 psi | 68% | 2769 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,424 psi | 66% | 2746 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 51,314 psi | 80% | 2894 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,611 psi | 64% | 2723 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,196 psi | 76% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,863 psi | 75% | 2746 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,510 psi | 65% | 2690 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 42,554 psi | 67% | 2825 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 47,021 psi | 74% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,125 psi | 79% | 2887 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 36,071 psi | 57% | 2700 fps | 99.8% |
| Somchem S385 | <<locked>> | 84% | 38,058 psi | 60% | 2690 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 53,621 psi | 84% | 2867 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,780 psi | 84% | 2884 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,918 psi | 70% | 2769 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,031 psi | 64% | 2749 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 40,292 psi | 63% | 2733 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 52,011 psi | 82% | 2874 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,321 psi | 63% | 2743 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 31,299 psi | 49% | 2575 fps | 96.6% |
| Vihtavuori N560 | 82.3 gr | 94% | 50,749 psi | 80% | 3041 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 98% | 46,644 psi | 73% | 2943 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,161 psi | 63% | 2713 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 42,003 psi | 66% | 2808 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,643 psi | 42% | 2526 fps | 96.5% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,149 psi | 68% | 2799 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 94 powders for .300 Weath. Mag. loaded with the .308 | 165gr | Reichenberg Spezial Jagd. Alliant Reloder-26 delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,903 fps to 3,166 fps. ADI AR 2217 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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. Norma MRP, Vihtavuori N560, ReloadSwiss RS 70 rank at the top here: for .300 Weath. Mag. with the .308 | 165gr | Reichenberg Spezial Jagd they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Norma 217 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.