Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 165gr | Barnes BND SPIT-FIRE bullet and 90 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 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 2495 | <<locked>> | 82% | 56,666 psi | 89% | 2894 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,725 psi | 90% | 2969 fps | 98.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,231 psi | 88% | 3012 fps | 99.7% |
| Accurate 4064 | <<locked>> | 84% | 57,232 psi | 90% | 2953 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,520 psi | 85% | 3009 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 56,956 psi | 89% | 2982 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,332 psi | 87% | 3048 fps | 98% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3104 fps | 97.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,637 psi | 89% | 3110 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,331 psi | 85% | 2956 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,491 psi | 85% | 2976 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,245 psi | 87% | 3071 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,507 psi | 89% | 3091 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,679 psi | 86% | 3038 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,912 psi | 88% | 3100 fps | 98.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,823 psi | 83% | 3028 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,890 psi | 72% | 2949 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 57,116 psi | 90% | 3176 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,300 psi | 80% | 3018 fps | 97.4% |
| Bofors RP3 | <<locked>> | 84% | 55,172 psi | 86% | 2972 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,912 psi | 88% | 3100 fps | 98.3% |
| Bofors RP7 | <<locked>> | 88% | 54,578 psi | 86% | 2956 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 84% | 55,651 psi | 87% | 2992 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 56,478 psi | 89% | 3061 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 88% | 56,043 psi | 88% | 3015 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 98% | 56,985 psi | 89% | 3048 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,782 psi | 87% | 3028 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,492 psi | 87% | 2986 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,811 psi | 89% | 3025 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,802 psi | 70% | 2979 fps | 96.5% |
| Hodgdon Superformance | <<locked>> | 90% | 56,971 psi | 89% | 3097 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,564 psi | 57% | 1877 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,305 psi | 90% | 2989 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,260 psi | 88% | 2966 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,477 psi | 87% | 2949 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 55,738 psi | 87% | 2992 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,086 psi | 88% | 2982 fps | 99.2% |
| IMR 4831 | <<locked>> | 92% | 54,926 psi | 86% | 2999 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,883 psi | 88% | 3005 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,737 psi | 86% | 2972 fps | 96.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,259 psi | 85% | 3074 fps | 96.8% |
| Lovex S060 | <<locked>> | 82% | 57,624 psi | 90% | 2949 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 56,666 psi | 89% | 2959 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,333 psi | 88% | 2979 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 54,288 psi | 85% | 2969 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,673 psi | 73% | 2854 fps | 98.6% |
| Norma 203B | <<locked>> | 84% | 57,348 psi | 90% | 3015 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,449 psi | 88% | 3041 fps | 98.1% |
| Norma MRP | <<locked>> | 98% | 55,535 psi | 87% | 3127 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 56,753 psi | 89% | 3048 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,679 psi | 86% | 2989 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,752 psi | 86% | 3094 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 92% | 55,448 psi | 87% | 3045 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,892 psi | 77% | 2959 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,231 psi | 58% | 1923 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,463 psi | 87% | 2972 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,869 psi | 88% | 3081 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,389 psi | 85% | 3031 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,521 psi | 89% | 3117 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,049 psi | 71% | 2976 fps | 97.7% |
| Rottweil R 902 | <<locked>> | 82% | 55,172 psi | 86% | 2920 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,477 psi | 87% | 2969 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,130 psi | 90% | 3022 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 98% | 57,653 psi | 90% | 3081 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 54,578 psi | 86% | 2956 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,333 psi | 88% | 2979 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 56,666 psi | 89% | 2959 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,288 psi | 85% | 2969 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,913 psi | 89% | 3028 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,624 psi | 90% | 2999 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,159 psi | 88% | 2851 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,999 psi | 88% | 2933 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,159 psi | 90% | 3077 fps | 98.5% |
| Somchem S355 | <<locked>> | 86% | 55,245 psi | 87% | 2963 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,158 psi | 86% | 2953 fps | 96.1% |
| Somchem S365 | <<locked>> | 94% | 56,130 psi | 88% | 3048 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,781 psi | 86% | 3002 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 82% | 55,579 psi | 87% | 2881 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,695 psi | 87% | 2894 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,521 psi | 89% | 2936 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,216 psi | 87% | 2989 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,983 psi | 85% | 2972 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 84% | 57,595 psi | 90% | 2940 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,273 psi | 85% | 2989 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 55,332 psi | 87% | 3054 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,738 psi | 87% | 3114 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,766 psi | 86% | 2949 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,710 psi | 89% | 3064 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,167 psi | 75% | 3094 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,781 psi | 86% | 2992 fps | 97.9% |
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 2495 | <<locked>> | 80% | 53,026 psi | 83% | 2841 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,633 psi | 79% | 2851 fps | 97.9% |
| Accurate 3100 | <<locked>> | 86% | 34,867 psi | 55% | 2602 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 50,227 psi | 79% | 2851 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,537 psi | 60% | 2710 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 47,355 psi | 74% | 2825 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 45,469 psi | 71% | 2867 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 96% | 49,676 psi | 78% | 2976 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,707 psi | 83% | 3048 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,921 psi | 75% | 2851 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,097 psi | 80% | 2920 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,492 psi | 59% | 2720 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,511 psi | 67% | 2848 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 45,165 psi | 71% | 2861 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,743 psi | 67% | 2851 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,485 psi | 43% | 2457 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,301 psi | 52% | 2644 fps | 95.2% |
| Alliant Reloder-26 | 70 gr | 82% | 31,618 psi | 50% | 2638 fps | 95.3% |
| Bofors RP15 | <<locked>> | 96% | 44,875 psi | 70% | 2897 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 48,370 psi | 76% | 2861 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 42,743 psi | 67% | 2851 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 42,540 psi | 67% | 2730 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 80% | 48,675 psi | 76% | 2871 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 40,509 psi | 63% | 2759 fps | 96.2% |
| Hodgdon H4350 | <<locked>> | 80% | 43,308 psi | 68% | 2779 fps | 95.6% |
| Hodgdon H4831 | <<locked>> | 96% | 53,258 psi | 83% | 2986 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,141 psi | 82% | 2966 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,056 psi | 55% | 2608 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,243 psi | 83% | 2969 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 41,989 psi | 66% | 2910 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 39,407 psi | 62% | 2762 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 43% | 1677 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,751 psi | 84% | 2933 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,821 psi | 78% | 2858 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,069 psi | 82% | 2890 fps | 98.7% |
| IMR 4350 | <<locked>> | 82% | 40,654 psi | 64% | 2707 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,874 psi | 69% | 2759 fps | 97% |
| IMR 4831 | <<locked>> | 80% | 37,028 psi | 58% | 2661 fps | 97.9% |
| IMR 4895 | <<locked>> | 80% | 52,431 psi | 82% | 2949 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 51,387 psi | 81% | 2917 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 98% | 50,676 psi | 79% | 3009 fps | 95.9% |
| Lovex S060 | <<locked>> | 80% | 54,346 psi | 85% | 2897 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,053 psi | 78% | 2854 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,292 psi | 65% | 2703 fps | 97.7% |
| Lovex S070 | <<locked>> | 80% | 39,552 psi | 62% | 2684 fps | 96.1% |
| Lovex S071 | <<locked>> | 92% | 36,100 psi | 57% | 2635 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 50,473 psi | 79% | 2904 fps | 100% |
| Norma 204 | <<locked>> | 86% | 46,050 psi | 72% | 2858 fps | 95.8% |
| Norma MRP | 72.9 gr | 88% | 39,088 psi | 61% | 2799 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 38,218 psi | 60% | 2700 fps | 98% |
| Ramshot Big Game | <<locked>> | 80% | 51,068 psi | 80% | 2930 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 47,384 psi | 74% | 2956 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 37,144 psi | 58% | 2687 fps | 96% |
| Ramshot Magnum | <<locked>> | 96% | 42,250 psi | 66% | 2825 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,760 psi | 44% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,675 psi | 76% | 2854 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,165 psi | 71% | 2907 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,406 psi | 60% | 2726 fps | 97.9% |
| ReloadSwiss RS 70 | 67.7 gr | 80% | 37,173 psi | 58% | 2733 fps | 97.2% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,972 psi | 61% | 2828 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 51,938 psi | 81% | 2871 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,484 psi | 71% | 2805 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,152 psi | 74% | 2848 fps | 95% |
| Rottweil R 905 | <<locked>> | 90% | 44,179 psi | 69% | 2841 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 42,540 psi | 67% | 2730 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,292 psi | 65% | 2703 fps | 97.7% |
| Shooters World Precision | <<locked>> | 80% | 50,053 psi | 78% | 2854 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,552 psi | 62% | 2684 fps | 96.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,702 psi | 73% | 2861 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,157 psi | 85% | 2946 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,688 psi | 73% | 2710 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,582 psi | 64% | 2651 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 43,772 psi | 69% | 2835 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 45,687 psi | 72% | 2802 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 51,590 psi | 81% | 2894 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 34,795 psi | 55% | 2657 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 39,320 psi | 62% | 2703 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 52,228 psi | 82% | 2831 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,243 psi | 82% | 2841 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,656 psi | 68% | 2730 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,639 psi | 62% | 2703 fps | 98.3% |
| Vihtavuori N165 | <<locked>> | 92% | 41,481 psi | 65% | 2743 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 50,575 psi | 79% | 2835 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,131 psi | 61% | 2703 fps | 98% |
| Vihtavuori N555 | <<locked>> | 80% | 30,458 psi | 48% | 2539 fps | 96% |
| Vihtavuori N560 | <<locked>> | 96% | 52,112 psi | 82% | 3051 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,870 psi | 61% | 2671 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 40,669 psi | 64% | 2759 fps | 96.2% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,962 psi | 41% | 2484 fps | 95.5% |
| Winchester Supreme 780 | <<locked>> | 92% | 44,367 psi | 70% | 2808 fps | 95.5% |
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 90 powders for .300 Weath. Mag. loaded with the .308 | 165gr | Barnes BND SPIT-FIRE. Alliant Reloder-26 delivers the highest muzzle velocity at 3,176 fps; across all powders the maximum-charge window runs from 1,877 fps to 3,176 fps. Accurate 3100 gives the best case fill at 100 %, and 90 of the 90 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 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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, ReloadSwiss RS 70 rank at the top here: for .300 Weath. Mag. with the .308 | 165gr | Barnes BND SPIT-FIRE 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.