Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 165gr | Barnes X FN bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 84% | 57,072 psi | 89% | 2943 fps | 99% |
| Accurate 3100 | <<locked>> | 96% | 56,217 psi | 88% | 3005 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 57,711 psi | 90% | 3051 fps | 100% |
| ADI AR 2208 | <<locked>> | 82% | 54,926 psi | 86% | 2949 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,392 psi | 90% | 3081 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 96% | 55,288 psi | 87% | 3081 fps | 97.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,843 psi | 66% | 2864 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,449 psi | 88% | 2979 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,377 psi | 90% | 3094 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,158 psi | 86% | 3061 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,927 psi | 89% | 3071 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,158 psi | 86% | 3081 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,043 psi | 88% | 3068 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,938 psi | 81% | 3058 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,492 psi | 89% | 3159 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,566 psi | 90% | 3120 fps | 98.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,066 psi | 75% | 2982 fps | 96.3% |
| Bofors RP5 | <<locked>> | 96% | 55,158 psi | 86% | 3081 fps | 98.4% |
| Bofors RP7 | <<locked>> | 86% | 56,492 psi | 89% | 2982 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,082 psi | 80% | 2995 fps | 97.1% |
| Hodgdon H380 | <<locked>> | 82% | 57,667 psi | 90% | 3015 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,274 psi | 87% | 3035 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 84% | 54,360 psi | 85% | 2986 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 94% | 55,317 psi | 87% | 3018 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,273 psi | 85% | 3002 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,563 psi | 86% | 2966 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,923 psi | 80% | 3110 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 86% | 55,303 psi | 87% | 3068 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,115 psi | 58% | 1900 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,392 psi | 90% | 3015 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,624 psi | 90% | 3005 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 57,551 psi | 90% | 3031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,507 psi | 89% | 3005 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 98% | 56,521 psi | 89% | 3114 fps | 97.5% |
| Lovex S065 | <<locked>> | 86% | 55,288 psi | 87% | 2959 fps | 99.8% |
| Lovex S070 | <<locked>> | 88% | 56,710 psi | 89% | 3002 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,635 psi | 84% | 2963 fps | 99.6% |
| Norma 204 | <<locked>> | 88% | 54,911 psi | 86% | 3015 fps | 98.1% |
| Norma MRP | <<locked>> | 94% | 54,781 psi | 86% | 3107 fps | 99.3% |
| Norma URP | <<locked>> | 88% | 55,680 psi | 87% | 3025 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,363 psi | 90% | 3136 fps | 98% |
| Ramshot Hunter | <<locked>> | 88% | 54,375 psi | 85% | 3022 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,593 psi | 87% | 3071 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,884 psi | 59% | 1942 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,058 psi | 89% | 2995 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,331 psi | 85% | 3048 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,261 psi | 90% | 3064 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,882 psi | 86% | 3084 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,314 psi | 80% | 3107 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 82% | 54,694 psi | 86% | 2949 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,376 psi | 87% | 2995 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 94% | 56,710 psi | 89% | 3064 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 86% | 56,492 psi | 89% | 2982 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,288 psi | 87% | 2959 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 88% | 56,710 psi | 89% | 3002 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,303 psi | 87% | 2995 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,551 psi | 90% | 2864 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,578 psi | 86% | 2907 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,246 psi | 88% | 3058 fps | 98.5% |
| Somchem S355 | <<locked>> | 84% | 57,435 psi | 90% | 2989 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,246 psi | 90% | 2989 fps | 96.9% |
| Somchem S365 | <<locked>> | 90% | 55,579 psi | 87% | 3028 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,479 psi | 90% | 3041 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 84% | 55,158 psi | 86% | 2910 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,435 psi | 90% | 3015 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,710 psi | 89% | 3012 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 88% | 56,811 psi | 89% | 3022 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,434 psi | 87% | 3048 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,665 psi | 86% | 3091 fps | 96.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,723 psi | 86% | 3071 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,637 psi | 89% | 2969 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,419 psi | 87% | 3038 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,449 psi | 88% | 3205 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,159 psi | 90% | 3028 fps | 98.5% |
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% | 50,314 psi | 79% | 2831 fps | 98.1% |
| Accurate 3100 | <<locked>> | 80% | 33,939 psi | 53% | 2562 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 44,541 psi | 70% | 2822 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 80% | 51,779 psi | 81% | 2897 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 42,032 psi | 66% | 2789 fps | 95% |
| ADI AR 2213 | <<locked>> | 92% | 48,559 psi | 76% | 2953 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 96% | 37,086 psi | 58% | 2740 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,229 psi | 83% | 2930 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,061 psi | 66% | 2815 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,124 psi | 75% | 2943 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 42,003 psi | 66% | 2785 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 88% | 42,772 psi | 67% | 2844 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,169 psi | 50% | 2585 fps | 98.3% |
| Alliant Reloder-25 | <<locked>> | 86% | 33,910 psi | 53% | 2651 fps | 95.9% |
| Alliant Reloder-26 | 71.2 gr | 80% | 34,693 psi | 54% | 2713 fps | 97.1% |
| Bofors RP15 | <<locked>> | 90% | 42,235 psi | 66% | 2831 fps | 95.2% |
| Bofors RP30 | <<locked>> | 98% | 45,194 psi | 71% | 2927 fps | 95.5% |
| Bofors RP5 | <<locked>> | 88% | 42,772 psi | 67% | 2844 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 47,195 psi | 74% | 2818 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 96% | 44,962 psi | 70% | 2871 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 54,186 psi | 85% | 2959 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 45,658 psi | 72% | 2858 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 80% | 48,124 psi | 75% | 2871 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 92% | 51,822 psi | 81% | 2956 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 50,821 psi | 80% | 2940 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,074 psi | 63% | 2710 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 42,264 psi | 66% | 2913 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 44,628 psi | 70% | 2874 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,862 psi | 44% | 1696 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,583 psi | 67% | 2740 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,240 psi | 76% | 2841 fps | 98.2% |
| IMR 4831 | <<locked>> | 80% | 42,366 psi | 66% | 2766 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 90% | 50,140 psi | 79% | 2894 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 46,659 psi | 73% | 2930 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 46,296 psi | 73% | 2799 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 44,657 psi | 70% | 2782 fps | 97.8% |
| Lovex S071 | <<locked>> | 84% | 33,417 psi | 52% | 2549 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 42,308 psi | 66% | 2772 fps | 95% |
| Norma MRP | 70.9 gr | 82% | 36,985 psi | 58% | 2736 fps | 95% |
| Norma URP | <<locked>> | 80% | 43,395 psi | 68% | 2805 fps | 99.2% |
| Ramshot Grand | <<locked>> | 92% | 46,659 psi | 73% | 2940 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 42,134 psi | 66% | 2789 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 90% | 39,421 psi | 62% | 2756 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,616 psi | 45% | 1742 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,621 psi | 84% | 2936 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,879 psi | 80% | 2995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,063 psi | 69% | 2835 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,119 psi | 66% | 2841 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 39,305 psi | 62% | 2835 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 51,343 psi | 80% | 2894 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 46,180 psi | 72% | 2825 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 84% | 41,292 psi | 65% | 2772 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 47,195 psi | 74% | 2818 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,296 psi | 73% | 2799 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 80% | 44,657 psi | 70% | 2782 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,953 psi | 81% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,068 psi | 80% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,368 psi | 71% | 2743 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 43,671 psi | 68% | 2825 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 51,111 psi | 80% | 2887 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 50,343 psi | 79% | 2867 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 40,335 psi | 63% | 2766 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 39,624 psi | 62% | 2700 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 48,805 psi | 76% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,672 psi | 70% | 2795 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 41,495 psi | 65% | 2733 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 44,382 psi | 70% | 2805 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 36,114 psi | 57% | 2671 fps | 98.3% |
| Vihtavuori N560 | 77.8 gr | 90% | 48,066 psi | 75% | 2966 fps | 95% |
| Vihtavuori N565 | <<locked>> | 96% | 48,167 psi | 75% | 2953 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,598 psi | 68% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,658 psi | 72% | 2858 fps | 97.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,906 psi | 45% | 2589 fps | 98% |
| Winchester Supreme 780 | <<locked>> | 88% | 43,874 psi | 69% | 2792 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 81 powders for .300 Weath. Mag. loaded with the .308 | 165gr | Barnes X FN. Winchester StaBALL HD delivers the highest muzzle velocity at 3,205 fps; across all powders the maximum-charge window runs from 1,900 fps to 3,205 fps. ADI AR 2217 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 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. ADI AR 2217, ADI AR 2225, 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. Norma MRP, Alliant Reloder-26, Vihtavuori N560 rank at the top here: for .300 Weath. Mag. with the .308 | 165gr | Barnes X FN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, IMR 8133 Enduron, 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.