Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 165gr | RWS Doppelkern bullet and 81 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 Vihtavuori N560.
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% | 57,363 psi | 90% | 2982 fps | 99.2% |
| Accurate 3100 | <<locked>> | 98% | 57,246 psi | 90% | 3041 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 57,334 psi | 90% | 2966 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,071 psi | 86% | 3028 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 55,593 psi | 87% | 3127 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 56,768 psi | 89% | 2995 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,767 psi | 87% | 3074 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 98% | 57,392 psi | 90% | 3133 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,624 psi | 62% | 2828 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,331 psi | 85% | 2969 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,796 psi | 87% | 3087 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,232 psi | 90% | 3110 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,376 psi | 87% | 3061 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,927 psi | 89% | 3130 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,653 psi | 90% | 3104 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,893 psi | 78% | 3038 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,346 psi | 85% | 3140 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,854 psi | 88% | 3110 fps | 98.5% |
| Bofors RP3 | <<locked>> | 82% | 55,274 psi | 87% | 2986 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 56,927 psi | 89% | 3130 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 54,433 psi | 85% | 2972 fps | 98.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,298 psi | 77% | 2979 fps | 96.9% |
| Hodgdon H380 | <<locked>> | 82% | 55,477 psi | 87% | 3002 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,869 psi | 89% | 3081 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 56,260 psi | 88% | 3038 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 57,421 psi | 90% | 3071 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,289 psi | 88% | 3054 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,057 psi | 88% | 3005 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,820 psi | 77% | 3084 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 88% | 57,537 psi | 90% | 3120 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,695 psi | 57% | 1906 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,086 psi | 88% | 2976 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,912 psi | 88% | 3012 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,014 psi | 88% | 2999 fps | 99.4% |
| IMR 4831 | <<locked>> | 90% | 55,463 psi | 87% | 3018 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,940 psi | 86% | 2999 fps | 96.8% |
| IMR 7828 SSC | <<locked>> | 98% | 54,781 psi | 86% | 3100 fps | 97.3% |
| Lovex S062 | <<locked>> | 82% | 56,565 psi | 89% | 2972 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,565 psi | 89% | 3002 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 54,549 psi | 85% | 2989 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,952 psi | 80% | 2940 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 57,392 psi | 90% | 3028 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,869 psi | 89% | 3068 fps | 98.5% |
| Norma MRP | <<locked>> | 96% | 56,637 psi | 89% | 3153 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 57,072 psi | 89% | 3064 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,564 psi | 87% | 3127 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 90% | 56,101 psi | 88% | 3071 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,693 psi | 84% | 3058 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,536 psi | 59% | 1952 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,288 psi | 87% | 2986 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,608 psi | 89% | 3097 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,085 psi | 86% | 3051 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,246 psi | 90% | 3140 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,211 psi | 77% | 3081 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 84% | 55,564 psi | 87% | 2982 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,421 psi | 90% | 3048 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 54,766 psi | 86% | 3051 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 86% | 54,433 psi | 85% | 2972 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,565 psi | 89% | 3002 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 56,565 psi | 89% | 2972 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,549 psi | 85% | 2989 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,087 psi | 89% | 3045 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,840 psi | 88% | 2861 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,854 psi | 88% | 2949 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,317 psi | 85% | 3045 fps | 98.4% |
| Somchem S355 | <<locked>> | 84% | 55,274 psi | 87% | 2976 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,463 psi | 87% | 2979 fps | 96.7% |
| Somchem S365 | <<locked>> | 92% | 57,319 psi | 90% | 3071 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,230 psi | 87% | 3022 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 86% | 56,652 psi | 89% | 2949 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,564 psi | 87% | 3005 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,781 psi | 86% | 2999 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 57,261 psi | 90% | 2949 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,694 psi | 86% | 3009 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,521 psi | 89% | 3081 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,652 psi | 89% | 3143 fps | 97.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,417 psi | 82% | 3051 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,143 psi | 86% | 2966 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,087 psi | 89% | 3084 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,418 psi | 85% | 3182 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,274 psi | 87% | 3018 fps | 98.4% |
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 2700 | <<locked>> | 80% | 53,664 psi | 84% | 2923 fps | 98.7% |
| Accurate 3100 | <<locked>> | 82% | 33,170 psi | 52% | 2566 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 53,795 psi | 84% | 2913 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,843 psi | 66% | 2789 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 94% | 51,793 psi | 81% | 3054 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 50,198 psi | 79% | 2890 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,859 psi | 67% | 2828 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 92% | 46,717 psi | 73% | 2933 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 98% | 37,144 psi | 58% | 2759 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,155 psi | 80% | 2917 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,190 psi | 63% | 2795 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,122 psi | 72% | 2923 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,728 psi | 67% | 2822 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 90% | 43,381 psi | 68% | 2874 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,762 psi | 47% | 2536 fps | 97.4% |
| Alliant Reloder-25 | <<locked>> | 88% | 33,823 psi | 53% | 2671 fps | 96% |
| Alliant Reloder-26 | 73.1 gr | 80% | 32,155 psi | 50% | 2657 fps | 96% |
| Bofors RP15 | <<locked>> | 92% | 42,786 psi | 67% | 2861 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 51,793 psi | 81% | 2930 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 43,381 psi | 68% | 2874 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 45,092 psi | 71% | 2799 fps | 97.3% |
| Hodgdon H1000 | <<locked>> | 98% | 46,035 psi | 72% | 2913 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 52,040 psi | 82% | 2946 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 43,656 psi | 68% | 2838 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 46,253 psi | 72% | 2854 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 50,038 psi | 78% | 2943 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 49,052 psi | 77% | 2927 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,898 psi | 59% | 2684 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 94% | 40,089 psi | 63% | 2877 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 42,786 psi | 67% | 2851 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,485 psi | 43% | 1706 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,765 psi | 83% | 2927 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,669 psi | 64% | 2720 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,543 psi | 73% | 2828 fps | 98% |
| IMR 4831 | <<locked>> | 80% | 39,885 psi | 63% | 2733 fps | 98.8% |
| IMR 4955 Enduron | <<locked>> | 90% | 48,588 psi | 76% | 2884 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 94% | 47,863 psi | 75% | 2972 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 53,069 psi | 83% | 2920 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,077 psi | 69% | 2776 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 42,264 psi | 66% | 2759 fps | 97.3% |
| Lovex S071 | <<locked>> | 88% | 34,548 psi | 54% | 2602 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 53,838 psi | 84% | 2976 fps | 100% |
| Norma 204 | <<locked>> | 82% | 43,323 psi | 68% | 2815 fps | 95.5% |
| Norma MRP | 74.5 gr | 84% | 37,115 psi | 58% | 2759 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 41,162 psi | 65% | 2776 fps | 98.9% |
| Ramshot Grand | <<locked>> | 92% | 44,701 psi | 70% | 2917 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 40,074 psi | 63% | 2766 fps | 97.3% |
| Ramshot Magnum | <<locked>> | 92% | 39,827 psi | 62% | 2785 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,123 psi | 44% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,721 psi | 81% | 2927 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,921 psi | 77% | 2976 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,611 psi | 65% | 2805 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,045 psi | 63% | 2812 fps | 98.4% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,956 psi | 58% | 2789 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 48,718 psi | 76% | 2874 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 47,253 psi | 74% | 2864 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 86% | 41,858 psi | 66% | 2802 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 45,092 psi | 71% | 2799 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,077 psi | 69% | 2776 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 53,069 psi | 83% | 2920 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,264 psi | 66% | 2759 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,038 psi | 78% | 2930 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,400 psi | 77% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,062 psi | 67% | 2720 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,481 psi | 65% | 2799 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 48,791 psi | 76% | 2871 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,588 psi | 76% | 2858 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 37,913 psi | 59% | 2733 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 39,885 psi | 63% | 2726 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 46,601 psi | 73% | 2792 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,670 psi | 67% | 2779 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 39,334 psi | 62% | 2707 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 53,809 psi | 84% | 2897 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,148 psi | 66% | 2779 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 33,301 psi | 52% | 2618 fps | 97.5% |
| Vihtavuori N560 | 81.6 gr | 92% | 49,356 psi | 77% | 3012 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 98% | 48,791 psi | 76% | 2982 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,785 psi | 65% | 2743 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,656 psi | 68% | 2838 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,382 psi | 41% | 2513 fps | 96.5% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,916 psi | 66% | 2769 fps | 95.2% |
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 81 powders for .300 Weath. Mag. loaded with the .308 | 165gr | RWS Doppelkern. Winchester StaBALL HD delivers the highest muzzle velocity at 3,182 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,182 fps. ADI AR 2225 gives the best case fill at 100 %, and 81 of the 81 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 165.0 gr projectile in 0.308" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-23, Alliant Reloder-25 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, Vihtavuori N560 rank at the top here: for .300 Weath. Mag. with the .308 | 165gr | RWS Doppelkern 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.