Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 170gr | Norma Tipstrike bullet and 86 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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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% | 55,898 psi | 88% | 2907 fps | 99% |
| Accurate 3100 | <<locked>> | 98% | 54,940 psi | 86% | 2959 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 55,666 psi | 87% | 2890 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,913 psi | 89% | 3009 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 57,334 psi | 90% | 3107 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 84% | 55,187 psi | 86% | 2920 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,682 psi | 90% | 3054 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 98% | 55,361 psi | 87% | 3051 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,289 psi | 88% | 2946 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,420 psi | 88% | 2969 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,377 psi | 90% | 3061 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,013 psi | 86% | 3025 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,014 psi | 89% | 3041 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,766 psi | 86% | 3045 fps | 98.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,477 psi | 87% | 3025 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,993 psi | 75% | 2959 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,825 psi | 87% | 3117 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,722 psi | 84% | 3025 fps | 98.2% |
| Bofors RP3 | <<locked>> | 84% | 57,464 psi | 90% | 2966 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 54,766 psi | 86% | 3045 fps | 98.5% |
| Bofors RP7 | <<locked>> | 88% | 56,362 psi | 88% | 2949 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,471 psi | 74% | 2894 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 84% | 57,551 psi | 90% | 2982 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,114 psi | 86% | 3002 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 86% | 54,578 psi | 86% | 2959 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 55,317 psi | 87% | 2989 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,186 psi | 85% | 2969 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,346 psi | 85% | 2933 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,036 psi | 74% | 2999 fps | 97.7% |
| Hodgdon Superformance | <<locked>> | 88% | 55,463 psi | 87% | 3038 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 58% | 1860 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,781 psi | 86% | 2904 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,188 psi | 90% | 2943 fps | 99.5% |
| IMR 4350 | <<locked>> | 90% | 54,259 psi | 85% | 2936 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,534 psi | 85% | 2923 fps | 99.2% |
| IMR 4831 | <<locked>> | 92% | 57,174 psi | 90% | 2995 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,840 psi | 89% | 2979 fps | 97.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,608 psi | 89% | 3084 fps | 97.7% |
| Lovex S062 | <<locked>> | 82% | 55,056 psi | 86% | 2897 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,853 psi | 86% | 2923 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 56,362 psi | 88% | 2969 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,834 psi | 77% | 2858 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 55,738 psi | 87% | 2953 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,882 psi | 86% | 2982 fps | 98.2% |
| Norma MRP | <<locked>> | 96% | 54,447 psi | 85% | 3071 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 55,361 psi | 87% | 2989 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,608 psi | 89% | 2979 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,232 psi | 90% | 3104 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 54,070 psi | 85% | 2986 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,343 psi | 80% | 2972 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,405 psi | 59% | 1903 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,450 psi | 90% | 2969 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,360 psi | 85% | 3015 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,710 psi | 89% | 3028 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,042 psi | 86% | 3054 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,253 psi | 74% | 2995 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 82% | 56,855 psi | 89% | 2907 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,522 psi | 90% | 2959 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,506 psi | 87% | 2963 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 96% | 56,333 psi | 88% | 3028 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 88% | 56,362 psi | 88% | 2949 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,853 psi | 86% | 2923 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 55,056 psi | 86% | 2897 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,362 psi | 88% | 2969 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,288 psi | 87% | 2966 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,389 psi | 85% | 2789 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,375 psi | 85% | 2874 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,854 psi | 88% | 3022 fps | 98.6% |
| Somchem S355 | <<locked>> | 86% | 57,145 psi | 90% | 2953 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,246 psi | 90% | 2956 fps | 97% |
| Somchem S365 | <<locked>> | 92% | 55,129 psi | 86% | 2992 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,913 psi | 89% | 3002 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 82% | 57,421 psi | 90% | 2864 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,580 psi | 90% | 2881 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,042 psi | 86% | 2877 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,421 psi | 90% | 2982 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,304 psi | 88% | 2976 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 55,854 psi | 88% | 2877 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,362 psi | 88% | 2986 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,360 psi | 85% | 3002 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,534 psi | 85% | 3058 fps | 96.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,096 psi | 79% | 2963 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,101 psi | 89% | 2946 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,332 psi | 87% | 3005 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,648 psi | 81% | 3100 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,174 psi | 90% | 2995 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 2700 | <<locked>> | 80% | 52,301 psi | 82% | 2848 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 34,127 psi | 53% | 2552 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 52,272 psi | 82% | 2841 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,335 psi | 63% | 2713 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 96% | 53,432 psi | 84% | 3041 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 48,863 psi | 77% | 2815 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,553 psi | 65% | 2753 fps | 95% |
| ADI AR 2213 | <<locked>> | 94% | 48,298 psi | 76% | 2920 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,777 psi | 78% | 2841 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,968 psi | 83% | 2913 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,914 psi | 61% | 2720 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,570 psi | 70% | 2854 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,220 psi | 65% | 2743 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 90% | 41,858 psi | 66% | 2802 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,747 psi | 45% | 2470 fps | 97% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,634 psi | 51% | 2595 fps | 95.4% |
| Alliant Reloder-26 | 69.3 gr | 80% | 30,806 psi | 48% | 2582 fps | 95.4% |
| Bofors RP15 | <<locked>> | 92% | 41,292 psi | 65% | 2785 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 50,241 psi | 79% | 2854 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 41,858 psi | 66% | 2802 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 43,903 psi | 69% | 2726 fps | 97% |
| Hodgdon H1000 | <<locked>> | 98% | 44,382 psi | 70% | 2831 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 50,488 psi | 79% | 2871 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 42,206 psi | 66% | 2759 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 44,976 psi | 70% | 2782 fps | 96.5% |
| Hodgdon H4831 | <<locked>> | 92% | 48,443 psi | 76% | 2867 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 94% | 50,691 psi | 79% | 2910 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,550 psi | 57% | 2612 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,176 psi | 65% | 2864 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 41,162 psi | 65% | 2772 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,354 psi | 43% | 1660 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,416 psi | 81% | 2851 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,548 psi | 84% | 2884 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 39,566 psi | 62% | 2651 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,252 psi | 71% | 2756 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 38,667 psi | 61% | 2664 fps | 98.6% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,183 psi | 79% | 2864 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 94% | 46,166 psi | 72% | 2890 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 51,663 psi | 81% | 2844 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,888 psi | 67% | 2707 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 41,133 psi | 64% | 2687 fps | 97% |
| Lovex S071 | <<locked>> | 88% | 33,257 psi | 52% | 2530 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 52,301 psi | 82% | 2900 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,916 psi | 66% | 2740 fps | 95% |
| Norma MRP | 72.4 gr | 86% | 38,319 psi | 60% | 2749 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 39,914 psi | 63% | 2707 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 52,968 psi | 83% | 2923 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,108 psi | 72% | 2900 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 38,740 psi | 61% | 2690 fps | 97% |
| Ramshot Magnum | <<locked>> | 94% | 41,147 psi | 64% | 2772 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,021 psi | 44% | 1703 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,357 psi | 79% | 2851 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,326 psi | 74% | 2904 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,161 psi | 63% | 2733 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,711 psi | 61% | 2740 fps | 98.1% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,189 psi | 60% | 2779 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 53,577 psi | 84% | 2861 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,340 psi | 74% | 2802 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,759 psi | 72% | 2789 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 86% | 40,422 psi | 63% | 2726 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 43,903 psi | 69% | 2726 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,888 psi | 67% | 2707 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 51,663 psi | 81% | 2844 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,133 psi | 64% | 2687 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,515 psi | 76% | 2854 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,153 psi | 75% | 2697 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,887 psi | 66% | 2648 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 42,830 psi | 67% | 2782 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 47,442 psi | 74% | 2799 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,227 psi | 79% | 2841 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 36,564 psi | 57% | 2664 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 38,522 psi | 60% | 2654 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 53,998 psi | 85% | 2818 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,056 psi | 85% | 2831 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,339 psi | 71% | 2723 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,292 psi | 65% | 2703 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 40,567 psi | 64% | 2690 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 52,315 psi | 82% | 2825 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,756 psi | 64% | 2703 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 31,937 psi | 50% | 2549 fps | 97.1% |
| Vihtavuori N560 | 77.4 gr | 92% | 47,471 psi | 74% | 2927 fps | 95% |
| Vihtavuori N565 | <<locked>> | 98% | 46,876 psi | 73% | 2900 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,335 psi | 63% | 2671 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 42,380 psi | 66% | 2766 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,425 psi | 40% | 2438 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 90% | 43,236 psi | 68% | 2753 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 93 powders for .300 Weath. Mag. loaded with the .308 | 170gr | Norma Tipstrike. Alliant Reloder-26 delivers the highest muzzle velocity at 3,117 fps; across all powders the maximum-charge window runs from 1,860 fps to 3,117 fps. ADI AR 2217 gives the best case fill at 100 %, and 93 of the 93 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 170.0 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-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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .308 | 170gr | Norma Tipstrike they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Norma 217 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.