Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 180gr | Remington PSP Core-Lokt bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Norma MRP and Accurate MAGPRO.
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 3100 | <<locked>> | 96% | 56,130 psi | 88% | 2910 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 57,595 psi | 90% | 2946 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,476 psi | 85% | 2992 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 55,230 psi | 87% | 2854 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,578 psi | 86% | 2940 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 96% | 55,941 psi | 88% | 2999 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,876 psi | 73% | 2828 fps | 96.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,582 psi | 65% | 2779 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,507 psi | 89% | 2877 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,679 psi | 86% | 2946 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,825 psi | 87% | 2963 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,128 psi | 85% | 2927 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,767 psi | 87% | 2995 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,971 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,388 psi | 82% | 2969 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,595 psi | 90% | 3064 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,723 psi | 86% | 2976 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 57,740 psi | 90% | 2897 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,501 psi | 76% | 2900 fps | 97.4% |
| Bofors RP5 | <<locked>> | 96% | 55,767 psi | 87% | 2995 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 56,507 psi | 89% | 2890 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,634 psi | 81% | 2920 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 82% | 57,696 psi | 90% | 2917 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,579 psi | 87% | 2940 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 54,926 psi | 86% | 2900 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 56,144 psi | 88% | 2940 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,056 psi | 86% | 2923 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,926 psi | 86% | 2871 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,343 psi | 80% | 3025 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 86% | 55,970 psi | 88% | 2979 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,956 psi | 58% | 1824 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,520 psi | 85% | 2874 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,665 psi | 86% | 2864 fps | 99.6% |
| IMR 4831 | <<locked>> | 88% | 54,172 psi | 85% | 2881 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,217 psi | 90% | 2923 fps | 98% |
| IMR 7828 SSC | <<locked>> | 98% | 57,609 psi | 90% | 3038 fps | 98.6% |
| Lovex S065 | <<locked>> | 86% | 55,114 psi | 86% | 2861 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,652 psi | 89% | 2907 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,490 psi | 84% | 2867 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 55,390 psi | 87% | 2930 fps | 98.9% |
| Norma MRP | <<locked>> | 94% | 55,680 psi | 87% | 3018 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 55,941 psi | 88% | 2927 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,230 psi | 85% | 2992 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 88% | 54,781 psi | 86% | 2930 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,623 psi | 89% | 2992 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,666 psi | 59% | 1867 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,435 psi | 90% | 2904 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,390 psi | 87% | 2949 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,580 psi | 90% | 2969 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,869 psi | 88% | 2995 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 3028 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 54,302 psi | 85% | 2844 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,072 psi | 88% | 2910 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 94% | 57,276 psi | 90% | 2976 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 86% | 56,507 psi | 89% | 2890 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,114 psi | 86% | 2861 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,652 psi | 89% | 2907 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,811 psi | 87% | 2900 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,331 psi | 85% | 2720 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,418 psi | 85% | 2812 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,811 psi | 89% | 2972 fps | 99.3% |
| Somchem S355 | <<locked>> | 84% | 57,551 psi | 90% | 2887 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,609 psi | 90% | 2904 fps | 97.9% |
| Somchem S365 | <<locked>> | 90% | 56,260 psi | 88% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,244 psi | 85% | 2894 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 55,143 psi | 86% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,360 psi | 85% | 2867 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,232 psi | 90% | 2927 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 88% | 57,014 psi | 89% | 2923 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,666 psi | 87% | 2946 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,550 psi | 87% | 3012 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,042 psi | 86% | 2982 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,508 psi | 90% | 2881 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,796 psi | 87% | 2946 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,012 psi | 85% | 3048 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,056 psi | 85% | 2884 fps | 98.8% |
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 3100 | <<locked>> | 80% | 32,663 psi | 51% | 2454 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 43,961 psi | 69% | 2720 fps | 99.8% |
| Accurate MAGPRO | 79.5 gr | 90% | 47,369 psi | 74% | 2864 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 51,953 psi | 81% | 2802 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,305 psi | 62% | 2644 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 90% | 45,759 psi | 72% | 2812 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 98% | 43,758 psi | 69% | 2762 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 94% | 34,287 psi | 54% | 2592 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,156 psi | 83% | 2828 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,003 psi | 66% | 2723 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,428 psi | 76% | 2844 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,146 psi | 61% | 2638 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,827 psi | 62% | 2690 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,285 psi | 49% | 2484 fps | 98.7% |
| Alliant Reloder-25 | <<locked>> | 84% | 31,140 psi | 49% | 2497 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,069 psi | 53% | 2615 fps | 97.8% |
| Bofors RP15 | <<locked>> | 88% | 39,479 psi | 62% | 2684 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 54,012 psi | 85% | 2841 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 42,351 psi | 66% | 2779 fps | 95.7% |
| Bofors RP5 | <<locked>> | 86% | 39,827 psi | 62% | 2690 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 46,818 psi | 73% | 2723 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 94% | 42,119 psi | 66% | 2730 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 54,027 psi | 85% | 2858 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,556 psi | 71% | 2766 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 80% | 48,240 psi | 76% | 2785 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 88% | 45,774 psi | 72% | 2756 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 44,846 psi | 70% | 2740 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,726 psi | 62% | 2612 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 90% | 36,999 psi | 58% | 2700 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 44,918 psi | 70% | 2785 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,659 psi | 43% | 1631 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,380 psi | 66% | 2654 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,269 psi | 76% | 2753 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 41,785 psi | 65% | 2664 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,556 psi | 70% | 2697 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 90% | 43,918 psi | 69% | 2785 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 45,774 psi | 72% | 2700 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 44,077 psi | 69% | 2687 fps | 98.4% |
| Lovex S071 | <<locked>> | 84% | 32,010 psi | 50% | 2438 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 42,177 psi | 66% | 2684 fps | 96.1% |
| Norma MRP | 71.1 gr | 82% | 36,419 psi | 57% | 2641 fps | 96% |
| Norma URP | <<locked>> | 80% | 43,062 psi | 67% | 2707 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 43,801 psi | 69% | 2799 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 41,901 psi | 66% | 2697 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 88% | 36,361 psi | 57% | 2608 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,210 psi | 44% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,664 psi | 84% | 2844 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,430 psi | 81% | 2894 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,671 psi | 68% | 2736 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,018 psi | 66% | 2753 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 36,332 psi | 57% | 2680 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 80% | 50,792 psi | 80% | 2789 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,352 psi | 68% | 2684 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 82% | 38,421 psi | 60% | 2621 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 46,818 psi | 73% | 2723 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,774 psi | 72% | 2700 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 44,077 psi | 69% | 2687 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,112 psi | 82% | 2844 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,242 psi | 80% | 2677 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,802 psi | 70% | 2648 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,087 psi | 60% | 2615 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 50,734 psi | 80% | 2785 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 47,268 psi | 74% | 2730 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 40,001 psi | 63% | 2664 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,564 psi | 57% | 2549 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 48,501 psi | 76% | 2710 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,643 psi | 70% | 2707 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 36,129 psi | 57% | 2533 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 43,961 psi | 69% | 2707 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 35,172 psi | 55% | 2562 fps | 98.7% |
| Vihtavuori N560 | 76.3 gr | 88% | 45,179 psi | 71% | 2822 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 94% | 44,918 psi | 70% | 2799 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,540 psi | 68% | 2667 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,759 psi | 72% | 2769 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,760 psi | 44% | 2480 fps | 98.6% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,261 psi | 60% | 2589 fps | 95% |
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 76 powders for .300 Weath. Mag. loaded with the .308 | 180gr | Remington PSP Core-Lokt. Alliant Reloder-26 delivers the highest muzzle velocity at 3,064 fps; across all powders the maximum-charge window runs from 1,824 fps to 3,064 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 180.0 gr projectile in 0.308" calls for a 1:15.0 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. Vihtavuori N560, Norma MRP, Accurate MAGPRO rank at the top here: for .300 Weath. Mag. with the .308 | 180gr | Remington PSP Core-Lokt 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.