Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 180gr | Barnes XLC BT bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 57,377 psi | 90% | 2900 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,317 psi | 87% | 2884 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 55,013 psi | 86% | 2979 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 82% | 55,898 psi | 88% | 2838 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,897 psi | 86% | 2920 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 96% | 56,246 psi | 88% | 2979 fps | 98% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,558 psi | 75% | 2812 fps | 96.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,685 psi | 67% | 2779 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,319 psi | 90% | 2864 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,940 psi | 86% | 2930 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,159 psi | 88% | 2946 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,621 psi | 86% | 2910 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 56,173 psi | 88% | 2979 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,305 psi | 90% | 2956 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,895 psi | 83% | 2956 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 53,853 psi | 84% | 2992 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 55,187 psi | 86% | 2959 fps | 98.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,066 psi | 77% | 2890 fps | 97.3% |
| Bofors RP5 | <<locked>> | 96% | 56,173 psi | 88% | 2979 fps | 99% |
| Bofors RP7 | <<locked>> | 86% | 57,406 psi | 90% | 2874 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,040 psi | 82% | 2897 fps | 98% |
| Hodgdon H414 | <<locked>> | 86% | 56,144 psi | 88% | 2927 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 55,376 psi | 87% | 2881 fps | 99% |
| Hodgdon H4831 | <<locked>> | 94% | 56,376 psi | 88% | 2917 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,245 psi | 87% | 2900 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,637 psi | 87% | 2854 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,938 psi | 81% | 3012 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 86% | 56,434 psi | 88% | 2963 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,275 psi | 58% | 1808 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,143 psi | 86% | 2858 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,129 psi | 86% | 2844 fps | 99.5% |
| IMR 4831 | <<locked>> | 88% | 55,216 psi | 87% | 2874 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,522 psi | 90% | 2904 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 98% | 57,667 psi | 90% | 3015 fps | 98.3% |
| Lovex S065 | <<locked>> | 86% | 56,159 psi | 88% | 2851 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,653 psi | 90% | 2894 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,679 psi | 86% | 2861 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 55,767 psi | 87% | 2910 fps | 98.7% |
| Norma 217ᴾ | <<locked>> | 100% | 38,493 psi | 60% | 2710 fps | 96.3% |
| Norma MRP | <<locked>> | 94% | 55,956 psi | 88% | 3002 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 56,710 psi | 89% | 2913 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,534 psi | 85% | 2972 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 88% | 55,288 psi | 87% | 2917 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,724 psi | 89% | 2969 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,116 psi | 60% | 1847 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,695 psi | 87% | 2936 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,679 psi | 86% | 2904 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,130 psi | 88% | 2979 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,431 psi | 82% | 3012 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 82% | 55,666 psi | 87% | 2835 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,434 psi | 88% | 2890 fps | 98% |
| Rottweil R 905 | <<locked>> | 94% | 57,653 psi | 90% | 2956 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 57,406 psi | 90% | 2874 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,159 psi | 88% | 2851 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,653 psi | 90% | 2894 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,318 psi | 88% | 2887 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,172 psi | 86% | 2707 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,361 psi | 87% | 2799 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,188 psi | 90% | 2949 fps | 99.1% |
| Somchem S355 | <<locked>> | 82% | 55,187 psi | 86% | 2828 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,650 psi | 86% | 2831 fps | 97% |
| Somchem S365 | <<locked>> | 90% | 56,753 psi | 89% | 2917 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,071 psi | 86% | 2881 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 84% | 56,217 psi | 88% | 2799 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,013 psi | 86% | 2854 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,259 psi | 85% | 2854 fps | 99% |
| Vihtavuori N550 | <<locked>> | 86% | 54,230 psi | 85% | 2861 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,565 psi | 89% | 2936 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,782 psi | 87% | 2992 fps | 97.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 2972 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 53,983 psi | 85% | 2812 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,376 psi | 88% | 2930 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,041 psi | 85% | 3038 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,549 psi | 85% | 2867 fps | 98.6% |
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% | 34,780 psi | 55% | 2480 fps | 96.5% |
| Accurate 4350 | <<locked>> | 80% | 45,614 psi | 71% | 2723 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 48,095 psi | 75% | 2858 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 52,736 psi | 83% | 2789 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 40,176 psi | 63% | 2638 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 90% | 46,456 psi | 73% | 2799 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 98% | 44,628 psi | 70% | 2753 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 94% | 35,708 psi | 56% | 2605 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 54,143 psi | 85% | 2815 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,062 psi | 67% | 2723 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,168 psi | 77% | 2838 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 40,263 psi | 63% | 2638 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 84% | 38,493 psi | 60% | 2638 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,837 psi | 51% | 2500 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 30,748 psi | 48% | 2457 fps | 95.3% |
| Alliant Reloder-26 | 68.1 gr | 80% | 35,621 psi | 56% | 2635 fps | 98.2% |
| Bofors RP15 | <<locked>> | 88% | 40,654 psi | 64% | 2687 fps | 95.5% |
| Bofors RP30 | <<locked>> | 96% | 43,352 psi | 68% | 2779 fps | 95.7% |
| Bofors RP5 | <<locked>> | 84% | 38,493 psi | 60% | 2638 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 47,964 psi | 75% | 2713 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 94% | 42,989 psi | 67% | 2720 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 46,615 psi | 73% | 2759 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 80% | 48,965 psi | 77% | 2769 fps | 98% |
| Hodgdon H4831 | <<locked>> | 88% | 46,572 psi | 73% | 2746 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 48,588 psi | 76% | 2785 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,002 psi | 64% | 2612 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 38,174 psi | 60% | 2703 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 45,658 psi | 72% | 2779 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,934 psi | 44% | 1611 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,424 psi | 68% | 2648 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,037 psi | 77% | 2740 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 43,265 psi | 68% | 2667 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 45,339 psi | 71% | 2687 fps | 95% |
| IMR 7828 SSC | <<locked>> | 90% | 44,672 psi | 70% | 2772 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 47,079 psi | 74% | 2697 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 45,484 psi | 71% | 2684 fps | 98.5% |
| Lovex S071 | <<locked>> | 82% | 32,285 psi | 51% | 2418 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 43,207 psi | 68% | 2680 fps | 96.1% |
| Norma 217 | <<locked>> | 98% | 36,347 psi | 57% | 2654 fps | 95.3% |
| Norma MRP | 66.1 gr | 80% | 35,433 psi | 56% | 2592 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 44,309 psi | 69% | 2703 fps | 99.7% |
| Ramshot Grand | <<locked>> | 90% | 44,628 psi | 70% | 2789 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 43,076 psi | 68% | 2697 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 88% | 37,666 psi | 59% | 2612 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,572 psi | 45% | 1650 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,924 psi | 81% | 2881 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,976 psi | 70% | 2740 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,902 psi | 67% | 2746 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 35,317 psi | 55% | 2625 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 52,315 psi | 82% | 2785 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 44,208 psi | 69% | 2671 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 82% | 39,682 psi | 62% | 2625 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 47,964 psi | 75% | 2713 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,079 psi | 74% | 2697 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 45,484 psi | 71% | 2684 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,953 psi | 83% | 2835 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,025 psi | 82% | 2661 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,224 psi | 72% | 2644 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 39,334 psi | 62% | 2618 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 51,953 psi | 81% | 2776 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 48,182 psi | 76% | 2720 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 41,379 psi | 65% | 2671 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,145 psi | 60% | 2559 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 49,676 psi | 78% | 2703 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,629 psi | 72% | 2697 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 37,405 psi | 59% | 2539 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 45,237 psi | 71% | 2703 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 36,985 psi | 58% | 2582 fps | 99% |
| Vihtavuori N560 | 72.7 gr | 88% | 45,963 psi | 72% | 2812 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 94% | 46,093 psi | 72% | 2802 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,382 psi | 70% | 2661 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,615 psi | 73% | 2759 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 29,588 psi | 46% | 2516 fps | 99.2% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,421 psi | 62% | 2589 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 79 powders for .300 Weath. Mag. loaded with the .308 | 180gr | Barnes XLC BT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,038 fps; across all powders the maximum-charge window runs from 1,808 fps to 3,038 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 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 1:11.5 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .308 | 180gr | Barnes XLC BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, IMR 8133 Enduron, 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.