Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 168gr | Nosler Custom Competition bullet and 83 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 4831, 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.
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% | 56,695 psi | 89% | 2943 fps | 99.1% |
| Accurate 3100 | <<locked>> | 98% | 56,130 psi | 88% | 2995 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 56,550 psi | 89% | 2927 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,288 psi | 85% | 2989 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,708 psi | 86% | 3084 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 84% | 56,144 psi | 88% | 2959 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,042 psi | 86% | 3035 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 98% | 56,405 psi | 88% | 3091 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,957 psi | 61% | 2789 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,232 psi | 90% | 2982 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,392 psi | 90% | 3005 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,056 psi | 86% | 3048 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,333 psi | 88% | 3068 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,491 psi | 85% | 3022 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,912 psi | 88% | 3084 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,753 psi | 89% | 3064 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,979 psi | 77% | 2999 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,305 psi | 90% | 3159 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,824 psi | 86% | 3068 fps | 98.4% |
| Bofors RP3 | <<locked>> | 82% | 54,621 psi | 86% | 2946 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,912 psi | 88% | 3084 fps | 98.7% |
| Bofors RP7 | <<locked>> | 88% | 57,363 psi | 90% | 2989 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,515 psi | 76% | 2936 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 82% | 54,911 psi | 86% | 2966 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,260 psi | 88% | 3041 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 55,579 psi | 87% | 2999 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 56,652 psi | 89% | 3031 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,303 psi | 87% | 3009 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,347 psi | 87% | 2969 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,993 psi | 75% | 3041 fps | 98% |
| Hodgdon Superformance | <<locked>> | 88% | 56,652 psi | 89% | 3081 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 58% | 1880 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,550 psi | 87% | 2943 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,100 psi | 86% | 2972 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,332 psi | 87% | 2959 fps | 99.3% |
| IMR 4831 | <<locked>> | 90% | 54,578 psi | 86% | 2979 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,696 psi | 90% | 3015 fps | 97.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,682 psi | 90% | 3123 fps | 97.9% |
| Lovex S062 | <<locked>> | 82% | 55,825 psi | 87% | 2930 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,854 psi | 88% | 2963 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 57,319 psi | 90% | 3005 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,038 psi | 78% | 2900 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 56,710 psi | 89% | 2992 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,912 psi | 88% | 3022 fps | 98.4% |
| Norma MRP | <<locked>> | 96% | 55,593 psi | 87% | 3110 fps | 99.5% |
| Norma URP | <<locked>> | 90% | 56,405 psi | 88% | 3028 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,667 psi | 90% | 3018 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,636 psi | 86% | 3081 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 90% | 55,129 psi | 86% | 3028 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,707 psi | 83% | 3015 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,391 psi | 59% | 1923 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,607 psi | 86% | 2946 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,579 psi | 87% | 3054 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,070 psi | 85% | 3009 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,333 psi | 88% | 3097 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,414 psi | 76% | 3041 fps | 99% |
| Rottweil R 903 | <<locked>> | 84% | 54,926 psi | 86% | 2946 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,507 psi | 89% | 3005 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 96% | 57,653 psi | 90% | 3068 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 88% | 57,363 psi | 90% | 2989 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,854 psi | 88% | 2963 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 55,825 psi | 87% | 2930 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,319 psi | 90% | 3005 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,362 psi | 88% | 3005 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,347 psi | 87% | 2825 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,230 psi | 87% | 2910 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,174 psi | 90% | 3064 fps | 98.8% |
| Somchem S355 | <<locked>> | 84% | 54,621 psi | 86% | 2940 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,578 psi | 86% | 2936 fps | 96.5% |
| Somchem S365 | <<locked>> | 92% | 56,420 psi | 88% | 3031 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,578 psi | 86% | 2982 fps | 99% |
| Vihtavuori N150 | <<locked>> | 86% | 55,912 psi | 88% | 2913 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,839 psi | 86% | 2969 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,638 psi | 90% | 3018 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 82% | 56,724 psi | 89% | 2913 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,464 psi | 90% | 3025 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,506 psi | 87% | 3038 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,651 psi | 87% | 3100 fps | 97.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,329 psi | 80% | 3005 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,331 psi | 85% | 2927 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,260 psi | 88% | 3041 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,258 psi | 83% | 3143 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,505 psi | 85% | 2979 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% | 53,098 psi | 83% | 2884 fps | 98.6% |
| Accurate 3100 | <<locked>> | 84% | 34,867 psi | 55% | 2589 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 53,185 psi | 83% | 2877 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,133 psi | 64% | 2749 fps | 99% |
| Accurate MAGPRO | <<locked>> | 94% | 50,836 psi | 80% | 3015 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 49,647 psi | 78% | 2854 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,235 psi | 66% | 2789 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 92% | 46,137 psi | 72% | 2897 fps | 95% |
| ADI AR 2225 | <<locked>> | 98% | 36,637 psi | 57% | 2723 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,589 psi | 79% | 2881 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,766 psi | 84% | 2949 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,653 psi | 62% | 2759 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,469 psi | 71% | 2887 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,076 psi | 66% | 2782 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,641 psi | 67% | 2835 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,356 psi | 46% | 2503 fps | 97.3% |
| Alliant Reloder-25 | <<locked>> | 88% | 33,330 psi | 52% | 2635 fps | 95.8% |
| Alliant Reloder-26 | 71.2 gr | 80% | 31,604 psi | 50% | 2621 fps | 95.8% |
| Bofors RP15 | <<locked>> | 92% | 42,061 psi | 66% | 2822 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 51,271 psi | 80% | 2894 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,641 psi | 67% | 2835 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 44,599 psi | 70% | 2759 fps | 97.2% |
| Hodgdon H1000 | <<locked>> | 98% | 45,281 psi | 71% | 2871 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 51,387 psi | 81% | 2907 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 43,062 psi | 67% | 2799 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 80% | 45,818 psi | 72% | 2822 fps | 96.8% |
| Hodgdon H4831 | <<locked>> | 92% | 49,371 psi | 77% | 2907 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,370 psi | 76% | 2887 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,347 psi | 59% | 2648 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 96% | 42,119 psi | 66% | 2907 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 80% | 41,989 psi | 66% | 2808 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,427 psi | 43% | 1680 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,199 psi | 82% | 2887 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,248 psi | 63% | 2687 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,934 psi | 72% | 2792 fps | 97.9% |
| IMR 4831 | 65.8 gr | 80% | 39,378 psi | 62% | 2700 fps | 98.8% |
| IMR 4955 Enduron | <<locked>> | 90% | 47,906 psi | 75% | 2844 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 94% | 47,253 psi | 74% | 2933 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 52,489 psi | 82% | 2881 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,555 psi | 68% | 2740 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 41,829 psi | 66% | 2720 fps | 97.2% |
| Lovex S071 | <<locked>> | 88% | 34,011 psi | 53% | 2566 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 53,127 psi | 83% | 2936 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,641 psi | 67% | 2776 fps | 95.3% |
| Norma MRP | <<locked>> | 84% | 36,506 psi | 57% | 2723 fps | 95% |
| Norma URP | <<locked>> | 80% | 40,654 psi | 64% | 2740 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 80% | 53,998 psi | 85% | 2963 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 47,152 psi | 74% | 2943 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 39,523 psi | 62% | 2726 fps | 97.2% |
| Ramshot Magnum | <<locked>> | 92% | 39,204 psi | 61% | 2746 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,949 psi | 44% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,184 psi | 80% | 2890 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,269 psi | 76% | 2943 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,017 psi | 64% | 2766 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,581 psi | 62% | 2779 fps | 98.4% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,957 psi | 61% | 2822 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 80% | 48,138 psi | 75% | 2838 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,644 psi | 73% | 2828 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 86% | 41,336 psi | 65% | 2766 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 44,599 psi | 70% | 2759 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,555 psi | 68% | 2740 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 52,489 psi | 82% | 2881 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,829 psi | 66% | 2720 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,429 psi | 77% | 2890 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,805 psi | 76% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,685 psi | 67% | 2684 fps | 97.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,959 psi | 64% | 2762 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 48,254 psi | 76% | 2835 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,184 psi | 80% | 2877 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 37,333 psi | 59% | 2697 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 39,262 psi | 62% | 2690 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 46,122 psi | 72% | 2759 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,032 psi | 66% | 2740 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 88% | 38,754 psi | 61% | 2671 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 53,185 psi | 83% | 2861 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,553 psi | 65% | 2740 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 32,677 psi | 51% | 2582 fps | 97.3% |
| Vihtavuori N560 | 79.5 gr | 92% | 48,544 psi | 76% | 2969 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 98% | 47,906 psi | 75% | 2943 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,176 psi | 65% | 2707 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,062 psi | 67% | 2799 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,991 psi | 41% | 2477 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,220 psi | 65% | 2730 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 89 powders for .300 Weath. Mag. loaded with the .308 | 168gr | Nosler Custom Competition. Alliant Reloder-26 delivers the highest muzzle velocity at 3,159 fps; across all powders the maximum-charge window runs from 1,880 fps to 3,159 fps. ADI AR 2217 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 168.0 gr projectile in 0.308" calls for a 1:13.5 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. IMR 4831, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .308 | 168gr | Nosler Custom Competition 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.