Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 180gr | Nosler Solid Base bullet and 78 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 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 3100 | <<locked>> | 96% | 53,896 psi | 84% | 2871 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 55,695 psi | 87% | 2913 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 56,202 psi | 88% | 3018 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 84% | 57,334 psi | 90% | 2877 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,391 psi | 88% | 2963 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 54,128 psi | 85% | 2959 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,074 psi | 63% | 2740 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,042 psi | 86% | 2851 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,376 psi | 88% | 2966 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 53,954 psi | 85% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,825 psi | 87% | 2949 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 57,479 psi | 90% | 3015 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,636 psi | 86% | 2936 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 2930 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,955 psi | 86% | 3025 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,347 psi | 88% | 2995 fps | 99% |
| Bofors RP3 | <<locked>> | 82% | 56,028 psi | 88% | 2867 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,456 psi | 73% | 2858 fps | 96.7% |
| Bofors RP5 | <<locked>> | 98% | 57,479 psi | 90% | 3015 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 55,071 psi | 86% | 2858 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,661 psi | 78% | 2877 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 82% | 56,072 psi | 88% | 2887 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 57,435 psi | 90% | 2963 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 56,695 psi | 89% | 2923 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 54,070 psi | 85% | 2900 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,840 psi | 89% | 2943 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,797 psi | 89% | 2890 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,443 psi | 77% | 2982 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 86% | 53,983 psi | 85% | 2940 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,753 psi | 58% | 1808 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,710 psi | 89% | 2858 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,391 psi | 88% | 2897 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,681 psi | 89% | 2884 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 55,941 psi | 88% | 2904 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,463 psi | 87% | 2887 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 98% | 55,477 psi | 87% | 2995 fps | 98.1% |
| Lovex S062 | <<locked>> | 82% | 57,217 psi | 90% | 2851 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,130 psi | 90% | 2884 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,027 psi | 86% | 2874 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,488 psi | 81% | 2835 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 57,479 psi | 90% | 2953 fps | 99% |
| Norma MRP | <<locked>> | 96% | 57,348 psi | 90% | 3041 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 54,172 psi | 85% | 2894 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,115 psi | 88% | 3015 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 56,710 psi | 89% | 2953 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,186 psi | 85% | 2949 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,652 psi | 59% | 1854 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,796 psi | 87% | 2871 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 57,305 psi | 90% | 2976 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,622 psi | 87% | 2936 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,725 psi | 90% | 3018 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,821 psi | 78% | 2982 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 56,115 psi | 88% | 2864 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,375 psi | 85% | 2877 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 55,419 psi | 87% | 2940 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 55,071 psi | 86% | 2858 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,130 psi | 90% | 2884 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,217 psi | 90% | 2851 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,027 psi | 86% | 2874 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,041 psi | 85% | 2871 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,420 psi | 88% | 2740 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,333 psi | 88% | 2835 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,969 psi | 86% | 2933 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 55,927 psi | 88% | 2858 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,043 psi | 88% | 2871 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 54,143 psi | 85% | 2897 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,014 psi | 88% | 2913 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 57,145 psi | 90% | 2831 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,130 psi | 88% | 2887 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,405 psi | 87% | 2890 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 55,172 psi | 86% | 2890 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 57,058 psi | 89% | 2963 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 57,290 psi | 90% | 3031 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,040 psi | 83% | 2946 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,637 psi | 87% | 2851 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,667 psi | 90% | 2966 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 55,390 psi | 87% | 3071 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,883 psi | 88% | 2907 fps | 98.9% |
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 3100 | <<locked>> | 80% | 31,357 psi | 49% | 2421 fps | 95.1% |
| Accurate 4350 | <<locked>> | 80% | 42,308 psi | 66% | 2684 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 92% | 48,849 psi | 77% | 2887 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 50,763 psi | 80% | 2776 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,582 psi | 64% | 2667 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 90% | 44,237 psi | 69% | 2772 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 96% | 35,346 psi | 55% | 2615 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,663 psi | 81% | 2799 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,814 psi | 64% | 2694 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,775 psi | 73% | 2815 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,538 psi | 64% | 2664 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,348 psi | 60% | 2654 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,153 psi | 47% | 2451 fps | 98.3% |
| Alliant Reloder-25 | <<locked>> | 86% | 32,068 psi | 50% | 2523 fps | 96.1% |
| Alliant Reloder-26 | 69.3 gr | 80% | 32,619 psi | 51% | 2575 fps | 97.1% |
| Bofors RP15 | <<locked>> | 90% | 40,582 psi | 64% | 2703 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 52,330 psi | 82% | 2812 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 43,482 psi | 68% | 2799 fps | 95.9% |
| Bofors RP5 | <<locked>> | 86% | 38,348 psi | 60% | 2654 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 45,730 psi | 72% | 2694 fps | 98% |
| Hodgdon H1000 | <<locked>> | 96% | 43,439 psi | 68% | 2749 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 52,620 psi | 82% | 2831 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,092 psi | 69% | 2730 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 46,731 psi | 73% | 2749 fps | 97.6% |
| Hodgdon H4831 | <<locked>> | 90% | 47,369 psi | 74% | 2782 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 46,427 psi | 73% | 2762 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,305 psi | 60% | 2579 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,014 psi | 60% | 2720 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 43,337 psi | 68% | 2753 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,543 psi | 43% | 1617 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,432 psi | 84% | 2808 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,162 psi | 65% | 2621 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,021 psi | 74% | 2723 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 40,437 psi | 63% | 2631 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,006 psi | 72% | 2720 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 45,266 psi | 71% | 2808 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 53,751 psi | 84% | 2802 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,483 psi | 70% | 2671 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 42,801 psi | 67% | 2654 fps | 98% |
| Lovex S071 | <<locked>> | 86% | 32,851 psi | 51% | 2461 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 40,973 psi | 64% | 2654 fps | 95.5% |
| Norma MRP | 68.9 gr | 82% | 34,983 psi | 55% | 2602 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 41,684 psi | 65% | 2674 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 42,090 psi | 66% | 2753 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 40,669 psi | 64% | 2667 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 37,507 psi | 59% | 2628 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 44% | 1657 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,214 psi | 82% | 2812 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,603 psi | 78% | 2861 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,177 psi | 66% | 2703 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,669 psi | 64% | 2717 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,838 psi | 55% | 2635 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 49,284 psi | 77% | 2759 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,846 psi | 70% | 2703 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 39,784 psi | 62% | 2648 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 45,730 psi | 72% | 2694 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,483 psi | 70% | 2671 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 53,751 psi | 84% | 2802 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,801 psi | 67% | 2654 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,734 psi | 80% | 2818 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,792 psi | 78% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,642 psi | 68% | 2618 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,421 psi | 62% | 2641 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 49,269 psi | 77% | 2756 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,861 psi | 72% | 2697 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 38,508 psi | 60% | 2631 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,797 psi | 59% | 2572 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 47,137 psi | 74% | 2680 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,120 psi | 68% | 2671 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 37,289 psi | 58% | 2556 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 42,699 psi | 67% | 2674 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 33,808 psi | 53% | 2530 fps | 98.3% |
| Vihtavuori N560 | 75.7 gr | 90% | 46,659 psi | 73% | 2844 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 96% | 46,093 psi | 72% | 2822 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,279 psi | 66% | 2638 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,237 psi | 69% | 2733 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,832 psi | 42% | 2441 fps | 97.9% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,610 psi | 62% | 2612 fps | 95.3% |
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 85 powders for .300 Weath. Mag. loaded with the .308 | 180gr | Nosler Solid Base. Winchester StaBALL HD delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,808 fps to 3,071 fps. ADI AR 2217 gives the best case fill at 100 %, and 85 of the 85 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:12.5 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. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for .300 Weath. Mag. with the .308 | 180gr | Nosler Solid Base they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, ReloadSwiss RS 80, Vihtavuori N170 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.