Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 165gr | Woodleigh PP SN bullet and 83 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 Alliant Reloder-16.
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.
A valid access license is required to use the Personalized Load Calculator.
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% | 56,942 psi | 89% | 2972 fps | 99.1% |
| Accurate 3100 | <<locked>> | 98% | 56,594 psi | 89% | 3028 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 56,797 psi | 89% | 2956 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,592 psi | 86% | 3018 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 55,013 psi | 86% | 3114 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 84% | 56,304 psi | 88% | 2989 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,347 psi | 87% | 3064 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 98% | 56,811 psi | 89% | 3123 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,204 psi | 61% | 2815 fps | 96.3% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,492 psi | 87% | 3061 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,406 psi | 90% | 3012 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,580 psi | 90% | 3035 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,317 psi | 87% | 3077 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,536 psi | 89% | 3097 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,781 psi | 86% | 3051 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,304 psi | 88% | 3117 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,261 psi | 90% | 3097 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,342 psi | 77% | 3028 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,679 psi | 84% | 3127 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,245 psi | 87% | 3097 fps | 98.4% |
| Bofors RP3 | <<locked>> | 82% | 54,984 psi | 86% | 2979 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 56,304 psi | 88% | 3117 fps | 98.7% |
| Bofors RP7 | <<locked>> | 88% | 57,609 psi | 90% | 3022 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,820 psi | 77% | 2969 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 82% | 55,056 psi | 86% | 2995 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,449 psi | 88% | 3071 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 55,825 psi | 87% | 3028 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 56,826 psi | 89% | 3061 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,724 psi | 87% | 3041 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,608 psi | 87% | 2999 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,298 psi | 76% | 3071 fps | 98% |
| Hodgdon Superformance | <<locked>> | 88% | 56,927 psi | 89% | 3110 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 58% | 1903 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,796 psi | 87% | 2972 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,303 psi | 87% | 2999 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,593 psi | 87% | 2992 fps | 99.3% |
| IMR 4831 | <<locked>> | 90% | 55,027 psi | 86% | 3012 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,578 psi | 86% | 2989 fps | 96.7% |
| IMR 7828 SSC | <<locked>> | 98% | 54,404 psi | 85% | 3094 fps | 97.2% |
| Lovex S062 | <<locked>> | 82% | 56,072 psi | 88% | 2963 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,130 psi | 88% | 2992 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 57,493 psi | 90% | 3035 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,314 psi | 79% | 2930 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 56,898 psi | 89% | 3022 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,246 psi | 88% | 3054 fps | 98.3% |
| Norma MRP | <<locked>> | 96% | 55,999 psi | 88% | 3140 fps | 99.5% |
| Norma URP | <<locked>> | 90% | 56,623 psi | 89% | 3058 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,984 psi | 86% | 3114 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 90% | 55,463 psi | 87% | 3054 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,156 psi | 83% | 3048 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,376 psi | 59% | 1946 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,853 psi | 86% | 2976 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,086 psi | 88% | 3087 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,418 psi | 85% | 3038 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,579 psi | 89% | 3127 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,762 psi | 76% | 3071 fps | 99% |
| Rottweil R 903 | <<locked>> | 84% | 55,071 psi | 86% | 2972 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,826 psi | 89% | 3035 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 94% | 54,157 psi | 85% | 3038 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 57,609 psi | 90% | 3022 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,130 psi | 88% | 2992 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 56,072 psi | 88% | 2963 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,493 psi | 90% | 3035 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,637 psi | 89% | 3035 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,593 psi | 87% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,448 psi | 87% | 2940 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,421 psi | 90% | 3094 fps | 98.8% |
| Somchem S355 | <<locked>> | 84% | 55,013 psi | 86% | 2969 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,969 psi | 86% | 2966 fps | 96.5% |
| Somchem S365 | <<locked>> | 92% | 56,594 psi | 89% | 3058 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,824 psi | 86% | 3015 fps | 99% |
| Vihtavuori N150 | <<locked>> | 86% | 56,188 psi | 88% | 2943 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,071 psi | 86% | 2999 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,259 psi | 85% | 2989 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 56,855 psi | 89% | 2943 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,273 psi | 85% | 2999 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,825 psi | 87% | 3071 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,043 psi | 88% | 3133 fps | 97.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,808 psi | 81% | 3038 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,578 psi | 86% | 2959 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,666 psi | 89% | 3077 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,679 psi | 84% | 3173 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,911 psi | 86% | 3009 fps | 98.3% |
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% | 53,432 psi | 84% | 2917 fps | 98.6% |
| Accurate 3100 | <<locked>> | 84% | 35,143 psi | 55% | 2615 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 53,461 psi | 84% | 2907 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,365 psi | 65% | 2779 fps | 99% |
| Accurate MAGPRO | <<locked>> | 94% | 51,213 psi | 80% | 3045 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 49,705 psi | 78% | 2881 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,496 psi | 67% | 2818 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 92% | 46,354 psi | 73% | 2927 fps | 95% |
| ADI AR 2225 | <<locked>> | 98% | 36,782 psi | 58% | 2749 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 42,786 psi | 67% | 2818 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,647 psi | 79% | 2907 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,998 psi | 85% | 2982 fps | 100% |
| Alliant Reloder-16 | 65.7 gr | 80% | 39,914 psi | 63% | 2789 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,658 psi | 72% | 2917 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,337 psi | 66% | 2812 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,989 psi | 67% | 2867 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,530 psi | 46% | 2530 fps | 97.2% |
| Alliant Reloder-25 | <<locked>> | 88% | 33,518 psi | 53% | 2661 fps | 95.7% |
| Alliant Reloder-26 | 72.5 gr | 80% | 31,821 psi | 50% | 2648 fps | 95.7% |
| Bofors RP15 | <<locked>> | 92% | 42,395 psi | 66% | 2851 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 51,474 psi | 81% | 2923 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,989 psi | 67% | 2867 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 44,831 psi | 70% | 2789 fps | 97.2% |
| Hodgdon H1000 | <<locked>> | 98% | 45,556 psi | 71% | 2900 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 51,547 psi | 81% | 2933 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 43,221 psi | 68% | 2825 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 80% | 45,992 psi | 72% | 2848 fps | 96.7% |
| Hodgdon H4831 | <<locked>> | 92% | 49,661 psi | 78% | 2936 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,660 psi | 76% | 2917 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,434 psi | 59% | 2671 fps | 99.4% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,769 psi | 62% | 2867 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 42,351 psi | 66% | 2841 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,441 psi | 43% | 1703 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,301 psi | 82% | 2913 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,422 psi | 63% | 2713 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,122 psi | 72% | 2818 fps | 97.9% |
| IMR 4831 | <<locked>> | 80% | 39,610 psi | 62% | 2726 fps | 98.7% |
| IMR 4955 Enduron | <<locked>> | 90% | 48,037 psi | 75% | 2871 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 94% | 47,500 psi | 74% | 2963 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 52,808 psi | 83% | 2910 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,816 psi | 69% | 2769 fps | 98.5% |
| Lovex S070 | <<locked>> | 80% | 42,032 psi | 66% | 2749 fps | 97.2% |
| Lovex S071 | <<locked>> | 88% | 34,156 psi | 54% | 2592 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 53,359 psi | 84% | 2966 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,946 psi | 67% | 2805 fps | 95.3% |
| Norma MRP | 75.6 gr | 86% | 39,291 psi | 62% | 2812 fps | 96% |
| Norma URP | <<locked>> | 80% | 40,886 psi | 64% | 2769 fps | 98.8% |
| Ramshot Grand | <<locked>> | 94% | 47,558 psi | 75% | 2976 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 39,668 psi | 62% | 2753 fps | 97.2% |
| Ramshot Magnum | <<locked>> | 92% | 39,363 psi | 62% | 2772 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,094 psi | 44% | 1745 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,300 psi | 80% | 2917 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,457 psi | 76% | 2969 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,336 psi | 65% | 2799 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,653 psi | 62% | 2802 fps | 98.3% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 39,363 psi | 62% | 2851 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 80% | 48,414 psi | 76% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,876 psi | 73% | 2858 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 86% | 41,437 psi | 65% | 2792 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 44,831 psi | 70% | 2789 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,816 psi | 69% | 2769 fps | 98.5% |
| Shooters World Precision | <<locked>> | 80% | 52,808 psi | 83% | 2910 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,032 psi | 66% | 2749 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,559 psi | 78% | 2920 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,095 psi | 77% | 2759 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,888 psi | 67% | 2710 fps | 97.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,060 psi | 64% | 2785 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 48,515 psi | 76% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,416 psi | 81% | 2907 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 37,579 psi | 59% | 2726 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 39,494 psi | 62% | 2720 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 46,311 psi | 73% | 2785 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,235 psi | 66% | 2769 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 88% | 38,972 psi | 61% | 2697 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 53,388 psi | 84% | 2890 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,742 psi | 65% | 2769 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 80% | 32,880 psi | 52% | 2608 fps | 97.3% |
| Vihtavuori N560 | <<locked>> | 92% | 48,805 psi | 76% | 2999 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 98% | 48,240 psi | 76% | 2969 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,423 psi | 65% | 2733 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,381 psi | 68% | 2828 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,092 psi | 41% | 2500 fps | 96.1% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,524 psi | 65% | 2759 fps | 95.1% |
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 83 powders for .300 Weath. Mag. loaded with the .308 | 165gr | Woodleigh PP SN. Winchester StaBALL HD delivers the highest muzzle velocity at 3,173 fps; across all powders the maximum-charge window runs from 1,903 fps to 3,173 fps. ADI AR 2225 gives the best case fill at 100 %, and 83 of the 83 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 1:15.5 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, Alliant Reloder-16 rank at the top here: for .300 Weath. Mag. with the .308 | 165gr | Woodleigh PP SN 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.