Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 181gr | Brenneke TUG 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 Ramshot Grand.
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% | 56,144 psi | 88% | 2904 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 57,595 psi | 90% | 2940 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,534 psi | 85% | 2989 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 55,376 psi | 87% | 2851 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,563 psi | 86% | 2933 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 96% | 55,970 psi | 88% | 2992 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,920 psi | 74% | 2822 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,640 psi | 65% | 2776 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,013 psi | 86% | 2936 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,637 psi | 89% | 2874 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,621 psi | 86% | 2940 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,811 psi | 87% | 2956 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,317 psi | 85% | 2927 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,796 psi | 87% | 2989 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 57,000 psi | 89% | 2966 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,446 psi | 82% | 2966 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,392 psi | 90% | 3054 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,752 psi | 86% | 2972 fps | 99% |
| Bofors RP3 | <<locked>> | 82% | 57,682 psi | 90% | 2890 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,559 psi | 76% | 2894 fps | 97.5% |
| Bofors RP5 | <<locked>> | 96% | 55,796 psi | 87% | 2989 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 56,666 psi | 89% | 2887 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,706 psi | 81% | 2917 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 86% | 55,593 psi | 87% | 2936 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 54,882 psi | 86% | 2897 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 56,130 psi | 88% | 2933 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,071 psi | 86% | 2917 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,158 psi | 86% | 2867 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,401 psi | 81% | 3022 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 86% | 55,985 psi | 88% | 2972 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,970 psi | 58% | 1821 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,462 psi | 85% | 2867 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,621 psi | 86% | 2858 fps | 99.6% |
| IMR 4831 | <<locked>> | 88% | 54,404 psi | 85% | 2877 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,246 psi | 90% | 2920 fps | 98% |
| IMR 7828 SSC | <<locked>> | 98% | 57,653 psi | 90% | 3031 fps | 98.6% |
| Lovex S065 | <<locked>> | 86% | 55,071 psi | 86% | 2854 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,594 psi | 89% | 2900 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,490 psi | 84% | 2864 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 55,376 psi | 87% | 2923 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 37,144 psi | 58% | 2694 fps | 96.1% |
| Norma MRP | <<locked>> | 94% | 55,651 psi | 87% | 3015 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 55,883 psi | 88% | 2920 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,259 psi | 85% | 2989 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 88% | 54,810 psi | 86% | 2923 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,710 psi | 89% | 2986 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,681 psi | 59% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,363 psi | 90% | 2897 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,347 psi | 87% | 2946 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,566 psi | 90% | 2963 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,898 psi | 88% | 2992 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,982 psi | 81% | 3022 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 54,215 psi | 85% | 2835 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,043 psi | 88% | 2907 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 94% | 57,276 psi | 90% | 2969 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 86% | 56,666 psi | 89% | 2887 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,071 psi | 86% | 2854 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,594 psi | 89% | 2900 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,782 psi | 87% | 2894 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,447 psi | 85% | 2717 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,360 psi | 85% | 2805 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,811 psi | 89% | 2966 fps | 99.3% |
| Somchem S355 | <<locked>> | 84% | 57,493 psi | 90% | 2881 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,653 psi | 90% | 2897 fps | 97.9% |
| Somchem S365 | <<locked>> | 90% | 56,217 psi | 88% | 2927 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,244 psi | 85% | 2887 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 55,274 psi | 87% | 2805 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,288 psi | 85% | 2861 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,261 psi | 90% | 2920 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 88% | 56,971 psi | 89% | 2917 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,651 psi | 87% | 2940 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,593 psi | 87% | 3005 fps | 97.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,100 psi | 86% | 2979 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,522 psi | 90% | 2874 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,811 psi | 87% | 2940 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,128 psi | 85% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,085 psi | 85% | 2881 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% | 32,619 psi | 51% | 2451 fps | 95.9% |
| Accurate 4350 | <<locked>> | 80% | 43,903 psi | 69% | 2713 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 47,384 psi | 74% | 2861 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 52,054 psi | 82% | 2799 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,233 psi | 61% | 2638 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 88% | 42,728 psi | 67% | 2743 fps | 95% |
| ADI AR 2217 | <<locked>> | 98% | 43,787 psi | 69% | 2759 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 94% | 34,287 psi | 54% | 2592 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 39,610 psi | 62% | 2641 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,069 psi | 83% | 2818 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,119 psi | 66% | 2723 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,588 psi | 76% | 2844 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,233 psi | 61% | 2635 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,958 psi | 63% | 2690 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,386 psi | 49% | 2484 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 31,256 psi | 49% | 2497 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,055 psi | 53% | 2612 fps | 97.9% |
| Bofors RP15 | <<locked>> | 88% | 39,450 psi | 62% | 2677 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 53,940 psi | 85% | 2835 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 42,380 psi | 66% | 2772 fps | 95.8% |
| Bofors RP5 | <<locked>> | 86% | 39,958 psi | 63% | 2690 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 46,920 psi | 74% | 2720 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 94% | 42,134 psi | 66% | 2726 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 45,513 psi | 71% | 2762 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 80% | 48,167 psi | 75% | 2779 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 88% | 45,730 psi | 72% | 2753 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 88% | 44,831 psi | 70% | 2733 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,784 psi | 62% | 2608 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 36,985 psi | 58% | 2697 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 44,889 psi | 70% | 2779 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,644 psi | 43% | 1624 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,453 psi | 67% | 2651 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,196 psi | 76% | 2746 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 41,887 psi | 66% | 2661 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,541 psi | 70% | 2694 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 90% | 43,888 psi | 69% | 2782 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 45,876 psi | 72% | 2697 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 44,150 psi | 69% | 2684 fps | 98.5% |
| Lovex S071 | <<locked>> | 84% | 32,097 psi | 50% | 2438 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 42,279 psi | 66% | 2684 fps | 96.2% |
| Norma 217 | <<locked>> | 98% | 34,853 psi | 55% | 2635 fps | 95.1% |
| Norma MRP | 69.1 gr | 80% | 33,953 psi | 53% | 2575 fps | 95% |
| Norma URP | <<locked>> | 80% | 43,192 psi | 68% | 2703 fps | 99.7% |
| Ramshot Grand | 77.1 gr | 90% | 43,801 psi | 69% | 2792 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 42,047 psi | 66% | 2694 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 88% | 36,361 psi | 57% | 2602 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,195 psi | 44% | 1663 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,838 psi | 84% | 2841 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,576 psi | 81% | 2890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,787 psi | 69% | 2733 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,974 psi | 66% | 2746 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 36,347 psi | 57% | 2677 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 80% | 50,908 psi | 80% | 2785 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,294 psi | 68% | 2677 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 82% | 38,537 psi | 60% | 2621 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 46,920 psi | 74% | 2720 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,876 psi | 72% | 2697 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 44,150 psi | 69% | 2684 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,228 psi | 82% | 2841 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,155 psi | 80% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,947 psi | 70% | 2644 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,189 psi | 60% | 2612 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 50,850 psi | 80% | 2779 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 47,253 psi | 74% | 2723 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 40,089 psi | 63% | 2661 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,521 psi | 57% | 2546 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 48,588 psi | 76% | 2707 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,585 psi | 70% | 2700 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 36,085 psi | 57% | 2530 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 44,063 psi | 69% | 2700 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 35,085 psi | 55% | 2559 fps | 98.8% |
| Vihtavuori N560 | 76 gr | 88% | 45,165 psi | 71% | 2815 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 94% | 44,933 psi | 70% | 2799 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,700 psi | 68% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,716 psi | 72% | 2762 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,847 psi | 44% | 2480 fps | 98.7% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,218 psi | 60% | 2582 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 77 powders for .300 Weath. Mag. loaded with the .308 | 181gr | Brenneke TUG. Alliant Reloder-26 delivers the highest muzzle velocity at 3,054 fps; across all powders the maximum-charge window runs from 1,821 fps to 3,054 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 181.0 gr projectile in 0.308" calls for a 1:13.5 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, Ramshot Grand rank at the top here: for .300 Weath. Mag. with the .308 | 181gr | Brenneke TUG 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.