Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 180gr | Norma PlastSpitz bullet and 77 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 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% | 55,347 psi | 87% | 2897 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 57,188 psi | 90% | 2936 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 53,925 psi | 85% | 2982 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 82% | 54,795 psi | 86% | 2844 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 53,983 psi | 85% | 2930 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 96% | 55,448 psi | 87% | 2986 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,267 psi | 73% | 2812 fps | 96.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,191 psi | 65% | 2769 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,072 psi | 88% | 2867 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,244 psi | 85% | 2940 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,376 psi | 87% | 2953 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,232 psi | 90% | 2976 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,172 psi | 86% | 2986 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,144 psi | 88% | 2959 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,880 psi | 81% | 2959 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,753 psi | 89% | 3051 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,128 psi | 85% | 2966 fps | 98.8% |
| Bofors RP3 | <<locked>> | 82% | 57,276 psi | 90% | 2887 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,747 psi | 75% | 2884 fps | 97.2% |
| Bofors RP5 | <<locked>> | 96% | 55,172 psi | 86% | 2986 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 56,130 psi | 88% | 2881 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,966 psi | 80% | 2904 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 82% | 57,246 psi | 90% | 2907 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,216 psi | 87% | 2933 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 54,360 psi | 85% | 2887 fps | 99% |
| Hodgdon H4831 | <<locked>> | 94% | 55,376 psi | 87% | 2923 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,259 psi | 85% | 2907 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,534 psi | 85% | 2861 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,865 psi | 80% | 3018 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 86% | 55,419 psi | 87% | 2969 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,840 psi | 58% | 1818 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,711 psi | 90% | 2877 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,522 psi | 90% | 2920 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,696 psi | 90% | 2907 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 57,261 psi | 90% | 2923 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,724 psi | 89% | 2913 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 98% | 56,797 psi | 89% | 3022 fps | 98.4% |
| Lovex S065 | <<locked>> | 86% | 54,752 psi | 86% | 2851 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,246 psi | 88% | 2900 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,895 psi | 83% | 2858 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 54,810 psi | 86% | 2917 fps | 98.7% |
| Norma MRP | <<locked>> | 94% | 55,071 psi | 86% | 3009 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 55,521 psi | 87% | 2917 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,725 psi | 90% | 3045 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 54,244 psi | 85% | 2920 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,869 psi | 88% | 2976 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,724 psi | 59% | 1864 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,840 psi | 89% | 2890 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,636 psi | 86% | 2940 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,956 psi | 89% | 2956 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,274 psi | 87% | 2986 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,285 psi | 80% | 3012 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 84% | 57,348 psi | 90% | 2884 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,506 psi | 87% | 2900 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 94% | 56,681 psi | 89% | 2963 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 56,130 psi | 88% | 2881 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,752 psi | 86% | 2851 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,246 psi | 88% | 2900 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,172 psi | 86% | 2890 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,363 psi | 90% | 2759 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,537 psi | 90% | 2858 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,231 psi | 88% | 2959 fps | 99.2% |
| Somchem S355 | <<locked>> | 84% | 57,130 psi | 90% | 2881 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,188 psi | 90% | 2894 fps | 97.7% |
| Somchem S365 | <<locked>> | 90% | 55,593 psi | 87% | 2920 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,159 psi | 90% | 2936 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 54,723 psi | 86% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,435 psi | 90% | 2910 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,681 psi | 89% | 2913 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 88% | 56,405 psi | 88% | 2913 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,027 psi | 86% | 2936 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,998 psi | 86% | 2999 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,578 psi | 86% | 2972 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,985 psi | 89% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,216 psi | 87% | 2933 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,363 psi | 90% | 3097 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,435 psi | 90% | 2933 fps | 99.1% |
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% | 32,300 psi | 51% | 2444 fps | 95.6% |
| Accurate 4350 | <<locked>> | 80% | 43,497 psi | 68% | 2710 fps | 99.7% |
| Accurate MAGPRO | 78.8 gr | 90% | 46,804 psi | 73% | 2851 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 51,532 psi | 81% | 2792 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,957 psi | 61% | 2635 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 90% | 45,252 psi | 71% | 2799 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 98% | 43,366 psi | 68% | 2749 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 96% | 36,230 psi | 57% | 2644 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,692 psi | 83% | 2818 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,742 psi | 65% | 2717 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,008 psi | 75% | 2838 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,769 psi | 61% | 2625 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,465 psi | 62% | 2684 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,951 psi | 49% | 2474 fps | 98.6% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,864 psi | 48% | 2487 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,562 psi | 53% | 2602 fps | 97.6% |
| Bofors RP15 | <<locked>> | 88% | 39,117 psi | 61% | 2674 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 53,563 psi | 84% | 2835 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 41,684 psi | 65% | 2759 fps | 95.4% |
| Bofors RP5 | <<locked>> | 86% | 39,465 psi | 62% | 2684 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 46,615 psi | 73% | 2717 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 94% | 41,713 psi | 65% | 2720 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 53,606 psi | 84% | 2851 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,165 psi | 71% | 2756 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 47,848 psi | 75% | 2776 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 88% | 45,281 psi | 71% | 2746 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,500 psi | 74% | 2789 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,276 psi | 62% | 2602 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 39,088 psi | 61% | 2753 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 44,353 psi | 70% | 2772 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,644 psi | 43% | 1627 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 54,215 psi | 85% | 2828 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,003 psi | 66% | 2644 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,921 psi | 75% | 2743 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 41,365 psi | 65% | 2654 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 47,036 psi | 74% | 2743 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 90% | 43,395 psi | 68% | 2772 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 45,382 psi | 71% | 2690 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 43,816 psi | 69% | 2680 fps | 98.3% |
| Lovex S071 | <<locked>> | 84% | 31,647 psi | 50% | 2431 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 41,771 psi | 65% | 2674 fps | 95.9% |
| Norma MRP | 70.5 gr | 82% | 36,056 psi | 56% | 2631 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 42,830 psi | 67% | 2700 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 43,294 psi | 68% | 2782 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 41,539 psi | 65% | 2687 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 88% | 35,926 psi | 56% | 2595 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,181 psi | 44% | 1663 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,287 psi | 84% | 2838 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,908 psi | 80% | 2884 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,265 psi | 68% | 2726 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,640 psi | 65% | 2740 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,795 psi | 56% | 2664 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 50,546 psi | 79% | 2785 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,018 psi | 67% | 2674 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 82% | 38,043 psi | 60% | 2612 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 46,615 psi | 73% | 2717 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,382 psi | 71% | 2690 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 43,816 psi | 69% | 2680 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,648 psi | 81% | 2835 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,792 psi | 80% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,440 psi | 70% | 2638 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,277 psi | 63% | 2664 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 50,285 psi | 79% | 2776 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,804 psi | 73% | 2720 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 39,537 psi | 62% | 2654 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,216 psi | 57% | 2539 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 48,254 psi | 76% | 2703 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,222 psi | 69% | 2694 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 38,174 psi | 60% | 2579 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 43,555 psi | 68% | 2697 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 34,751 psi | 54% | 2552 fps | 98.6% |
| Vihtavuori N560 | 75.6 gr | 88% | 44,643 psi | 70% | 2808 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 94% | 44,411 psi | 70% | 2789 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,207 psi | 68% | 2657 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,339 psi | 71% | 2759 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,456 psi | 43% | 2470 fps | 98.4% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,509 psi | 63% | 2635 fps | 95.7% |
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 77 powders for .300 Weath. Mag. loaded with the .308 | 180gr | Norma PlastSpitz. Winchester StaBALL HD delivers the highest muzzle velocity at 3,097 fps; across all powders the maximum-charge window runs from 1,818 fps to 3,097 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 1:14.0 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. Norma MRP, Vihtavuori N560, Accurate MAGPRO rank at the top here: for .300 Weath. Mag. with the .308 | 180gr | Norma PlastSpitz 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.