Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 165gr | Brenneke TOG bullet and 84 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% | 56,144 psi | 88% | 2956 fps | 98.9% |
| Accurate 3100 | <<locked>> | 98% | 55,622 psi | 87% | 3012 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 56,043 psi | 88% | 2943 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,334 psi | 90% | 3061 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 55,651 psi | 87% | 2976 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,389 psi | 85% | 3048 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 98% | 55,767 psi | 87% | 3100 fps | 97.3% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,563 psi | 86% | 3041 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,739 psi | 89% | 2999 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,855 psi | 89% | 3025 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,375 psi | 85% | 3064 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,637 psi | 87% | 3081 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,537 psi | 90% | 3094 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,143 psi | 86% | 3097 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,985 psi | 88% | 3081 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,559 psi | 76% | 3012 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,594 psi | 89% | 3173 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,099 psi | 85% | 3077 fps | 98.2% |
| Bofors RP3 | <<locked>> | 82% | 54,085 psi | 85% | 2963 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,143 psi | 86% | 3097 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 56,855 psi | 89% | 3005 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,892 psi | 75% | 2946 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 82% | 54,375 psi | 85% | 2979 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,637 psi | 87% | 3054 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 86% | 55,042 psi | 86% | 3012 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 55,985 psi | 88% | 3041 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,853 psi | 86% | 3025 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,723 psi | 86% | 2986 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,514 psi | 74% | 3051 fps | 97.7% |
| Hodgdon Superformance | <<locked>> | 88% | 55,970 psi | 88% | 3094 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 58% | 1900 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,100 psi | 86% | 2956 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,363 psi | 90% | 2992 fps | 99.5% |
| IMR 4350 | <<locked>> | 90% | 54,549 psi | 85% | 2982 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,810 psi | 86% | 2976 fps | 99.2% |
| IMR 4831 | <<locked>> | 92% | 57,711 psi | 90% | 3051 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,348 psi | 90% | 3031 fps | 97.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,159 psi | 90% | 3140 fps | 97.7% |
| Lovex S062 | <<locked>> | 82% | 55,376 psi | 87% | 2949 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,332 psi | 87% | 2976 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 56,739 psi | 89% | 3022 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,371 psi | 77% | 2910 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 56,202 psi | 88% | 3009 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,274 psi | 87% | 3035 fps | 98.1% |
| Norma MRP | <<locked>> | 96% | 55,071 psi | 86% | 3127 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 55,782 psi | 87% | 3041 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,087 psi | 89% | 3035 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,867 psi | 84% | 3091 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 90% | 54,476 psi | 85% | 3041 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,953 psi | 81% | 3025 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,376 psi | 59% | 1942 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,653 psi | 90% | 3018 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,839 psi | 86% | 3071 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,305 psi | 90% | 3084 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,608 psi | 87% | 3110 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,688 psi | 75% | 3048 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 82% | 57,174 psi | 90% | 2963 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,331 psi | 85% | 2963 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,898 psi | 88% | 3018 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 96% | 56,927 psi | 89% | 3081 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 88% | 56,855 psi | 89% | 3005 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,332 psi | 87% | 2976 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 55,376 psi | 87% | 2949 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,739 psi | 89% | 3022 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,782 psi | 87% | 3022 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,708 psi | 86% | 2841 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,708 psi | 86% | 2927 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,449 psi | 88% | 3077 fps | 98.6% |
| Somchem S355 | <<locked>> | 86% | 57,508 psi | 90% | 3005 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,215 psi | 85% | 2949 fps | 96.3% |
| Somchem S365 | <<locked>> | 92% | 55,695 psi | 87% | 3048 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,638 psi | 90% | 3054 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 86% | 55,332 psi | 87% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,259 psi | 85% | 2982 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,898 psi | 89% | 3028 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 56,202 psi | 88% | 2930 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,840 psi | 89% | 3038 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,766 psi | 86% | 3051 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,100 psi | 86% | 3114 fps | 96.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,763 psi | 80% | 3018 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,566 psi | 90% | 2995 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,637 psi | 87% | 3054 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,286 psi | 82% | 3153 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 53,824 psi | 84% | 2989 fps | 98% |
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% | 52,634 psi | 82% | 2900 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 34,432 psi | 54% | 2598 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 52,663 psi | 83% | 2894 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,640 psi | 64% | 2762 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 49,211 psi | 77% | 2871 fps | 100% |
| ADI AR 2209 | <<locked>> | 88% | 44,715 psi | 70% | 2864 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 94% | 48,805 psi | 76% | 2972 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 42,061 psi | 66% | 2802 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,951 psi | 78% | 2894 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,272 psi | 83% | 2966 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,262 psi | 62% | 2769 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,933 psi | 70% | 2900 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,611 psi | 65% | 2792 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,090 psi | 66% | 2844 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,993 psi | 45% | 2513 fps | 96.9% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,938 psi | 52% | 2641 fps | 95.3% |
| Alliant Reloder-26 | 71.4 gr | 80% | 31,198 psi | 49% | 2628 fps | 95.4% |
| Bofors RP15 | <<locked>> | 94% | 44,454 psi | 70% | 2894 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 50,560 psi | 79% | 2907 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,090 psi | 66% | 2844 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 44,208 psi | 69% | 2776 fps | 96.9% |
| Hodgdon H1000 | <<locked>> | 98% | 44,686 psi | 70% | 2877 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 50,894 psi | 80% | 2920 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 42,424 psi | 66% | 2808 fps | 97% |
| Hodgdon H4350 | <<locked>> | 80% | 45,223 psi | 71% | 2828 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 94% | 52,257 psi | 82% | 2982 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,213 psi | 80% | 2963 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,767 psi | 58% | 2654 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,553 psi | 65% | 2910 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 41,481 psi | 65% | 2818 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 43% | 1696 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,793 psi | 81% | 2904 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,969 psi | 85% | 2936 fps | 99.1% |
| IMR 4350 | <<locked>> | 80% | 39,711 psi | 62% | 2697 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,542 psi | 71% | 2805 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 38,972 psi | 61% | 2710 fps | 98.6% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,589 psi | 79% | 2917 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 94% | 46,659 psi | 73% | 2943 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 52,069 psi | 82% | 2897 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,192 psi | 68% | 2756 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 41,423 psi | 65% | 2733 fps | 96.9% |
| Lovex S071 | <<locked>> | 88% | 33,591 psi | 53% | 2575 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 52,605 psi | 82% | 2953 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,192 psi | 66% | 2785 fps | 95% |
| Norma MRP | 74.5 gr | 86% | 38,609 psi | 61% | 2795 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 40,234 psi | 63% | 2756 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 53,258 psi | 83% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,499 psi | 73% | 2953 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 39,088 psi | 61% | 2740 fps | 96.9% |
| Ramshot Magnum | <<locked>> | 94% | 41,655 psi | 65% | 2825 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,949 psi | 44% | 1736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,720 psi | 79% | 2904 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,703 psi | 75% | 2956 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,495 psi | 63% | 2779 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,972 psi | 61% | 2785 fps | 98% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,566 psi | 60% | 2828 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 53,780 psi | 84% | 2910 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,674 psi | 75% | 2851 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,166 psi | 72% | 2838 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 88% | 43,584 psi | 68% | 2838 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 44,208 psi | 69% | 2776 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,192 psi | 68% | 2756 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 52,069 psi | 82% | 2897 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,423 psi | 65% | 2733 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,907 psi | 77% | 2907 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,399 psi | 76% | 2746 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,264 psi | 66% | 2697 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,192 psi | 68% | 2831 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 47,805 psi | 75% | 2851 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,662 psi | 79% | 2890 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 36,738 psi | 58% | 2707 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 38,812 psi | 61% | 2700 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 45,672 psi | 72% | 2776 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,611 psi | 65% | 2753 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 40,828 psi | 64% | 2736 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 52,736 psi | 83% | 2877 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,133 psi | 64% | 2753 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 32,242 psi | 51% | 2592 fps | 97% |
| Vihtavuori N560 | 79.7 gr | 92% | 47,892 psi | 75% | 2979 fps | 95% |
| Vihtavuori N565 | <<locked>> | 98% | 47,384 psi | 74% | 2953 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,741 psi | 64% | 2720 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 42,612 psi | 67% | 2812 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,657 psi | 40% | 2480 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,642 psi | 68% | 2802 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 84 powders for .300 Weath. Mag. loaded with the .308 | 165gr | Brenneke TOG. Alliant Reloder-26 delivers the highest muzzle velocity at 3,173 fps; across all powders the maximum-charge window runs from 1,900 fps to 3,173 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 84 of the 84 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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 | Brenneke TOG 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.