Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 185gr | Reichenberg HDB Universal bullet and 82 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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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% | 57,290 psi | 90% | 2825 fps | 99.6% |
| Accurate 3100 | <<locked>> | 98% | 56,971 psi | 89% | 2884 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 56,898 psi | 89% | 2799 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,853 psi | 86% | 2867 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 55,622 psi | 87% | 2976 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 84% | 56,782 psi | 89% | 2835 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,043 psi | 88% | 2923 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 98% | 57,377 psi | 90% | 2982 fps | 98.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,392 psi | 62% | 2697 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,331 psi | 85% | 2805 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,956 psi | 88% | 2927 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,159 psi | 90% | 2943 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,448 psi | 87% | 2910 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,840 psi | 89% | 2972 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,696 psi | 90% | 2943 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,806 psi | 78% | 2890 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,230 psi | 85% | 2979 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,738 psi | 87% | 2953 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 55,143 psi | 86% | 2822 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,745 psi | 72% | 2815 fps | 96.8% |
| Bofors RP5 | <<locked>> | 98% | 56,840 psi | 89% | 2972 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 54,404 psi | 85% | 2815 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,139 psi | 77% | 2835 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 82% | 55,347 psi | 87% | 2841 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,942 psi | 89% | 2923 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 86% | 56,217 psi | 88% | 2881 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 96% | 57,479 psi | 90% | 2923 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,289 psi | 88% | 2904 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,217 psi | 88% | 2848 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,834 psi | 77% | 2943 fps | 99% |
| Hodgdon Superformance | <<locked>> | 88% | 57,595 psi | 90% | 2963 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,753 psi | 58% | 1785 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,304 psi | 88% | 2818 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,912 psi | 88% | 2854 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,188 psi | 88% | 2848 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 55,288 psi | 87% | 2858 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,114 psi | 86% | 2851 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 98% | 54,940 psi | 86% | 2956 fps | 98.2% |
| Lovex S062 | <<locked>> | 82% | 56,420 psi | 88% | 2808 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,434 psi | 88% | 2841 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 54,346 psi | 85% | 2831 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,430 psi | 79% | 2785 fps | 99.7% |
| Norma 203B | <<locked>> | 82% | 57,348 psi | 90% | 2864 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,811 psi | 89% | 2910 fps | 99.1% |
| Norma MRP | <<locked>> | 96% | 56,739 psi | 89% | 2999 fps | 99.9% |
| Norma URP | <<locked>> | 90% | 57,174 psi | 90% | 2904 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,593 psi | 87% | 2976 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 55,999 psi | 88% | 2910 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,635 psi | 84% | 2910 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,463 psi | 59% | 1824 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,158 psi | 86% | 2828 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,840 psi | 89% | 2930 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,824 psi | 86% | 2890 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,377 psi | 90% | 2979 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,037 psi | 77% | 2936 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 55,477 psi | 87% | 2822 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,348 psi | 90% | 2890 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 94% | 54,679 psi | 86% | 2894 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 54,404 psi | 85% | 2815 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,434 psi | 88% | 2841 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 56,420 psi | 88% | 2808 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,346 psi | 85% | 2831 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,203 psi | 90% | 2881 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,999 psi | 88% | 2703 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,695 psi | 87% | 2792 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,244 psi | 85% | 2890 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 55,143 psi | 86% | 2815 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,405 psi | 87% | 2831 fps | 97.5% |
| Somchem S365 | <<locked>> | 92% | 57,319 psi | 90% | 2907 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,245 psi | 87% | 2871 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 56,463 psi | 88% | 2789 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,564 psi | 87% | 2848 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,810 psi | 86% | 2851 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 82% | 57,174 psi | 90% | 2785 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,578 psi | 86% | 2851 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,362 psi | 88% | 2920 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,753 psi | 89% | 2992 fps | 98.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,112 psi | 82% | 2900 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,071 psi | 86% | 2808 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,174 psi | 90% | 2927 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,781 psi | 86% | 3025 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,274 psi | 87% | 2867 fps | 99% |
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% | 53,751 psi | 84% | 2772 fps | 99.2% |
| Accurate 3100 | <<locked>> | 80% | 30,385 psi | 48% | 2372 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 53,316 psi | 84% | 2746 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,452 psi | 65% | 2638 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 92% | 48,138 psi | 75% | 2844 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 50,125 psi | 79% | 2733 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,943 psi | 63% | 2625 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 90% | 43,700 psi | 68% | 2733 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 96% | 34,548 psi | 54% | 2572 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,097 psi | 80% | 2756 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,074 psi | 63% | 2648 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,108 psi | 72% | 2772 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,871 psi | 62% | 2621 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,652 psi | 59% | 2612 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,414 psi | 46% | 2405 fps | 98.2% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,328 psi | 49% | 2477 fps | 96% |
| Alliant Reloder-26 | 68.6 gr | 80% | 31,792 psi | 50% | 2526 fps | 97.1% |
| Bofors RP15 | <<locked>> | 90% | 39,943 psi | 63% | 2664 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 51,605 psi | 81% | 2769 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,685 psi | 67% | 2753 fps | 96% |
| Bofors RP5 | <<locked>> | 86% | 37,652 psi | 59% | 2612 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 44,933 psi | 70% | 2651 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 94% | 39,958 psi | 63% | 2648 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 51,837 psi | 81% | 2785 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,555 psi | 68% | 2690 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 46,311 psi | 73% | 2710 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 90% | 46,688 psi | 73% | 2740 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,919 psi | 72% | 2723 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,652 psi | 59% | 2539 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,391 psi | 59% | 2680 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 42,583 psi | 67% | 2707 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,427 psi | 43% | 1591 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,707 psi | 83% | 2766 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,654 psi | 64% | 2582 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,398 psi | 73% | 2680 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 39,726 psi | 62% | 2592 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,469 psi | 71% | 2680 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 44,730 psi | 70% | 2766 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 53,098 psi | 83% | 2759 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,816 psi | 69% | 2628 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 42,061 psi | 66% | 2612 fps | 98.1% |
| Lovex S071 | <<locked>> | 86% | 31,908 psi | 50% | 2411 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 53,751 psi | 84% | 2812 fps | 100% |
| Norma 204 | <<locked>> | 80% | 40,292 psi | 63% | 2612 fps | 95.6% |
| Norma MRP | 68.2 gr | 82% | 34,229 psi | 54% | 2556 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 41,075 psi | 64% | 2631 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 41,495 psi | 65% | 2713 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 39,972 psi | 63% | 2625 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 36,825 psi | 58% | 2589 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,949 psi | 44% | 1631 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,779 psi | 81% | 2772 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,008 psi | 77% | 2818 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,510 psi | 65% | 2661 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,001 psi | 63% | 2674 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,055 psi | 53% | 2589 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 48,530 psi | 76% | 2717 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,251 psi | 69% | 2664 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 84% | 39,030 psi | 61% | 2602 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 44,933 psi | 70% | 2651 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,816 psi | 69% | 2628 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 53,098 psi | 83% | 2759 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,061 psi | 66% | 2612 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,067 psi | 78% | 2776 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,284 psi | 77% | 2608 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,815 psi | 67% | 2575 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,682 psi | 61% | 2598 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 48,602 psi | 76% | 2713 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,281 psi | 71% | 2657 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 37,840 psi | 59% | 2592 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,941 psi | 58% | 2530 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 46,514 psi | 73% | 2641 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,525 psi | 67% | 2631 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 36,535 psi | 57% | 2513 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 53,708 psi | 84% | 2740 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,916 psi | 66% | 2631 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 32,938 psi | 52% | 2484 fps | 98.3% |
| Vihtavuori N560 | 74.9 gr | 90% | 45,934 psi | 72% | 2802 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 96% | 45,266 psi | 71% | 2776 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,684 psi | 65% | 2598 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,555 psi | 68% | 2690 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,947 psi | 41% | 2392 fps | 97.7% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,943 psi | 61% | 2572 fps | 95.4% |
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 | 185gr | Reichenberg HDB Universal. Winchester StaBALL HD delivers the highest muzzle velocity at 3,025 fps; across all powders the maximum-charge window runs from 1,785 fps to 3,025 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 185.0 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-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. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for .300 Weath. Mag. with the .308 | 185gr | Reichenberg HDB Universal 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.