Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 165gr | Ferrobull Tripple Expand Jagd bullet and 86 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 Alliant Reloder-26.
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% | 55,941 psi | 88% | 2966 fps | 99% |
| Accurate 3100 | <<locked>> | 98% | 55,085 psi | 86% | 3018 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 55,245 psi | 87% | 2946 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,782 psi | 89% | 3064 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 53,766 psi | 84% | 3100 fps | 96% |
| ADI AR 2208 | <<locked>> | 84% | 55,434 psi | 87% | 2982 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,346 psi | 85% | 3058 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 98% | 55,767 psi | 87% | 3114 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,333 psi | 88% | 3005 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,507 psi | 89% | 3028 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,070 psi | 85% | 3068 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,405 psi | 87% | 3087 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,421 psi | 90% | 3104 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,129 psi | 86% | 3107 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,753 psi | 87% | 3084 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,225 psi | 76% | 3015 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,507 psi | 89% | 3179 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,853 psi | 84% | 3084 fps | 98.2% |
| Bofors RP3 | <<locked>> | 84% | 57,217 psi | 90% | 3022 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,129 psi | 86% | 3107 fps | 98.6% |
| Bofors RP7 | <<locked>> | 88% | 56,565 psi | 89% | 3015 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,747 psi | 75% | 2956 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 84% | 57,580 psi | 90% | 3045 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,347 psi | 87% | 3064 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 86% | 54,665 psi | 86% | 3022 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 55,825 psi | 87% | 3054 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,708 psi | 86% | 3035 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,476 psi | 85% | 2992 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,181 psi | 74% | 3058 fps | 97.8% |
| Hodgdon Superformance | <<locked>> | 88% | 55,796 psi | 87% | 3100 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,506 psi | 57% | 1906 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,868 psi | 86% | 2966 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,319 psi | 90% | 3005 fps | 99.5% |
| IMR 4350 | <<locked>> | 90% | 54,360 psi | 85% | 2995 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,723 psi | 86% | 2986 fps | 99.3% |
| IMR 4831 | <<locked>> | 92% | 57,261 psi | 90% | 3058 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,232 psi | 90% | 3041 fps | 97.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,985 psi | 89% | 3150 fps | 97.8% |
| Lovex S062 | <<locked>> | 82% | 54,969 psi | 86% | 2956 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,824 psi | 86% | 2982 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 56,333 psi | 88% | 3028 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,863 psi | 77% | 2913 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 55,811 psi | 87% | 3015 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,230 psi | 87% | 3048 fps | 98.2% |
| Norma MRP | <<locked>> | 96% | 54,766 psi | 86% | 3130 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 55,521 psi | 87% | 3048 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,884 psi | 89% | 3041 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,809 psi | 84% | 3104 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 90% | 54,389 psi | 85% | 3048 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,692 psi | 81% | 3031 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,275 psi | 58% | 1952 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,406 psi | 90% | 3028 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,752 psi | 86% | 3081 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,116 psi | 90% | 3091 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,506 psi | 87% | 3120 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,500 psi | 74% | 3054 fps | 98.8% |
| Rottweil R 902 | <<locked>> | 82% | 56,768 psi | 89% | 2969 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,508 psi | 90% | 3022 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,854 psi | 88% | 3028 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 96% | 56,768 psi | 89% | 3094 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 88% | 56,565 psi | 89% | 3015 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,824 psi | 86% | 2982 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 54,969 psi | 86% | 2956 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,333 psi | 88% | 3028 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,593 psi | 87% | 3028 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,491 psi | 85% | 2848 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,375 psi | 85% | 2933 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,304 psi | 88% | 3087 fps | 98.7% |
| Somchem S355 | <<locked>> | 86% | 57,290 psi | 90% | 3015 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,682 psi | 90% | 3022 fps | 97.1% |
| Somchem S365 | <<locked>> | 92% | 55,347 psi | 87% | 3051 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,305 psi | 90% | 3064 fps | 99.3% |
| Vihtavuori N135 | <<locked>> | 82% | 57,377 psi | 90% | 2923 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,551 psi | 90% | 2940 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,100 psi | 86% | 2936 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,537 psi | 90% | 3045 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,869 psi | 89% | 3041 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 55,811 psi | 87% | 2936 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,710 psi | 89% | 3048 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,433 psi | 85% | 3058 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,897 psi | 86% | 3123 fps | 96.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,459 psi | 79% | 3022 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,421 psi | 90% | 3005 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,593 psi | 87% | 3068 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,257 psi | 82% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,696 psi | 90% | 3061 fps | 98.7% |
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% | 52,243 psi | 82% | 2907 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 33,736 psi | 53% | 2592 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 51,706 psi | 81% | 2894 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,001 psi | 63% | 2759 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 94% | 49,966 psi | 78% | 3031 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 48,820 psi | 77% | 2874 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,524 psi | 65% | 2805 fps | 95% |
| ADI AR 2213 | <<locked>> | 94% | 48,588 psi | 76% | 2982 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,574 psi | 78% | 2897 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,924 psi | 83% | 2972 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,769 psi | 61% | 2772 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,585 psi | 70% | 2907 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,336 psi | 65% | 2802 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 90% | 41,858 psi | 66% | 2851 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,340 psi | 44% | 2503 fps | 96.7% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,314 psi | 51% | 2635 fps | 95.2% |
| Alliant Reloder-26 | 72.6 gr | 80% | 30,618 psi | 48% | 2621 fps | 95.2% |
| Bofors RP15 | <<locked>> | 92% | 41,292 psi | 65% | 2838 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 49,995 psi | 78% | 2910 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 41,858 psi | 66% | 2851 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 43,642 psi | 68% | 2779 fps | 96.9% |
| Hodgdon H1000 | <<locked>> | 98% | 44,512 psi | 70% | 2887 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 50,444 psi | 79% | 2927 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 42,163 psi | 66% | 2815 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 44,904 psi | 70% | 2838 fps | 96.5% |
| Hodgdon H4831 | <<locked>> | 92% | 48,631 psi | 76% | 2927 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,068 psi | 80% | 2972 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,376 psi | 57% | 2657 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,176 psi | 65% | 2917 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 41,133 psi | 64% | 2825 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,209 psi | 43% | 1703 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,358 psi | 80% | 2910 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,751 psi | 84% | 2946 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 39,349 psi | 62% | 2700 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,281 psi | 71% | 2812 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 38,435 psi | 60% | 2710 fps | 98.5% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,285 psi | 79% | 2923 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 94% | 46,253 psi | 72% | 2949 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 51,692 psi | 81% | 2904 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,569 psi | 67% | 2756 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 40,915 psi | 64% | 2736 fps | 96.9% |
| Lovex S071 | <<locked>> | 90% | 35,041 psi | 55% | 2625 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 52,286 psi | 82% | 2959 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,785 psi | 65% | 2789 fps | 95% |
| Norma MRP | 75.7 gr | 86% | 38,145 psi | 60% | 2795 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 39,798 psi | 62% | 2756 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 53,113 psi | 83% | 2986 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,398 psi | 73% | 2963 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 38,624 psi | 61% | 2743 fps | 96.9% |
| Ramshot Magnum | <<locked>> | 94% | 41,205 psi | 65% | 2828 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,804 psi | 44% | 1745 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,285 psi | 79% | 2910 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,369 psi | 74% | 2963 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,943 psi | 63% | 2779 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,653 psi | 61% | 2789 fps | 98.1% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,014 psi | 60% | 2828 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 53,374 psi | 84% | 2917 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,123 psi | 74% | 2854 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,919 psi | 72% | 2848 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 88% | 43,265 psi | 68% | 2841 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 43,642 psi | 68% | 2779 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,569 psi | 67% | 2756 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 51,692 psi | 81% | 2904 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,915 psi | 64% | 2736 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,559 psi | 76% | 2913 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,022 psi | 75% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,640 psi | 65% | 2697 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 42,888 psi | 67% | 2838 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 47,181 psi | 74% | 2851 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,372 psi | 79% | 2900 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 36,260 psi | 57% | 2707 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 38,189 psi | 60% | 2697 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 53,809 psi | 84% | 2874 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,128 psi | 85% | 2890 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,266 psi | 71% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,191 psi | 65% | 2756 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 40,422 psi | 63% | 2740 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 52,359 psi | 82% | 2884 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,640 psi | 64% | 2756 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 31,618 psi | 50% | 2585 fps | 96.8% |
| Vihtavuori N560 | 81 gr | 92% | 47,674 psi | 75% | 2986 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 98% | 46,905 psi | 74% | 2953 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,263 psi | 63% | 2720 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 42,163 psi | 66% | 2815 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,976 psi | 39% | 2467 fps | 95.2% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,395 psi | 68% | 2808 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 93 powders for .300 Weath. Mag. loaded with the .308 | 165gr | Ferrobull Tripple Expand Jagd. Alliant Reloder-26 delivers the highest muzzle velocity at 3,179 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,179 fps. ADI AR 2217 gives the best case fill at 100 %, and 93 of the 93 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 1:13.0 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, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .308 | 165gr | Ferrobull Tripple Expand 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.