Load Specifications
Load data in caliber .300 Weath. Mag. with .307 | 165gr | Rhino Solid Shank bullet and 83 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% | 56,681 psi | 89% | 2969 fps | 99% |
| Accurate 3100 | <<locked>> | 98% | 56,159 psi | 88% | 3022 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 56,434 psi | 88% | 2949 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,027 psi | 85% | 3012 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,578 psi | 86% | 3104 fps | 96% |
| ADI AR 2208 | <<locked>> | 84% | 55,985 psi | 88% | 2982 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,897 psi | 86% | 3054 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 98% | 56,405 psi | 88% | 3114 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,072 psi | 89% | 3005 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,203 psi | 90% | 3028 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,737 psi | 86% | 3071 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,956 psi | 88% | 3087 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,331 psi | 85% | 3041 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,898 psi | 88% | 3110 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,492 psi | 89% | 3087 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,950 psi | 77% | 3022 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,145 psi | 90% | 3179 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,549 psi | 85% | 3084 fps | 98.3% |
| Bofors RP3 | <<locked>> | 82% | 54,433 psi | 85% | 2969 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,898 psi | 88% | 3110 fps | 98.6% |
| Bofors RP7 | <<locked>> | 88% | 57,116 psi | 90% | 3012 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,428 psi | 76% | 2959 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 82% | 54,723 psi | 86% | 2989 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,941 psi | 88% | 3061 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 86% | 55,332 psi | 87% | 3018 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 56,420 psi | 88% | 3054 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,288 psi | 87% | 3035 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,056 psi | 86% | 2989 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,935 psi | 75% | 3061 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 88% | 56,434 psi | 88% | 3100 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 58% | 1900 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,463 psi | 87% | 2963 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,056 psi | 86% | 2995 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,332 psi | 87% | 2986 fps | 99.3% |
| IMR 4831 | <<locked>> | 90% | 54,491 psi | 85% | 3002 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,172 psi | 85% | 2979 fps | 96.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,653 psi | 90% | 3150 fps | 97.8% |
| Lovex S062 | <<locked>> | 82% | 55,738 psi | 87% | 2956 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,622 psi | 87% | 2982 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 57,232 psi | 90% | 3031 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,864 psi | 78% | 2920 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 56,550 psi | 89% | 3012 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,782 psi | 87% | 3048 fps | 98.2% |
| Norma MRP | <<locked>> | 96% | 55,550 psi | 87% | 3133 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 56,304 psi | 88% | 3051 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,638 psi | 90% | 3041 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,346 psi | 85% | 3104 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 90% | 54,984 psi | 86% | 3048 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,547 psi | 82% | 3035 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,391 psi | 59% | 1946 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,375 psi | 85% | 2969 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,463 psi | 87% | 3081 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,911 psi | 84% | 3031 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,115 psi | 88% | 3120 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,225 psi | 76% | 3058 fps | 98.9% |
| Rottweil R 902 | <<locked>> | 82% | 57,551 psi | 90% | 2969 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,723 psi | 86% | 2969 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,391 psi | 88% | 3025 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 96% | 57,435 psi | 90% | 3091 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 88% | 57,116 psi | 90% | 3012 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,622 psi | 87% | 2982 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 55,738 psi | 87% | 2956 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,232 psi | 90% | 3031 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,130 psi | 88% | 3025 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,056 psi | 86% | 2844 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,187 psi | 86% | 2933 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,956 psi | 89% | 3087 fps | 98.7% |
| Somchem S355 | <<locked>> | 84% | 54,462 psi | 85% | 2959 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,592 psi | 86% | 2959 fps | 96.4% |
| Somchem S365 | <<locked>> | 92% | 56,028 psi | 88% | 3051 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,389 psi | 85% | 3005 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 86% | 55,680 psi | 87% | 2936 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,592 psi | 86% | 2989 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,348 psi | 90% | 3038 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 56,536 psi | 89% | 2933 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,363 psi | 90% | 3048 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,317 psi | 87% | 3061 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,608 psi | 87% | 3123 fps | 97% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,213 psi | 80% | 3025 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,157 psi | 85% | 2949 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,159 psi | 88% | 3068 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,069 psi | 83% | 3166 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,288 psi | 85% | 2995 fps | 98.1% |
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 2700 | <<locked>> | 80% | 52,968 psi | 83% | 2907 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 34,838 psi | 55% | 2608 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 53,069 psi | 83% | 2900 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,988 psi | 64% | 2769 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 94% | 50,763 psi | 80% | 3035 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 49,371 psi | 77% | 2871 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,076 psi | 66% | 2808 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 94% | 49,211 psi | 77% | 2982 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,314 psi | 79% | 2900 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,635 psi | 84% | 2972 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,595 psi | 62% | 2779 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,324 psi | 71% | 2910 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,916 psi | 66% | 2802 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,569 psi | 67% | 2858 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,269 psi | 46% | 2520 fps | 97.1% |
| Alliant Reloder-25 | <<locked>> | 88% | 33,185 psi | 52% | 2648 fps | 95.5% |
| Alliant Reloder-26 | 71.9 gr | 80% | 31,430 psi | 49% | 2635 fps | 95.5% |
| Bofors RP15 | <<locked>> | 92% | 41,989 psi | 66% | 2841 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 50,923 psi | 80% | 2913 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,569 psi | 67% | 2858 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 44,527 psi | 70% | 2782 fps | 97% |
| Hodgdon H1000 | <<locked>> | 98% | 45,223 psi | 71% | 2890 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 51,242 psi | 80% | 2930 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 42,917 psi | 67% | 2818 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 80% | 45,527 psi | 71% | 2838 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 92% | 49,240 psi | 77% | 2927 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,663 psi | 81% | 2969 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,101 psi | 58% | 2664 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,930 psi | 66% | 2923 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 41,930 psi | 66% | 2831 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,369 psi | 43% | 1696 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,953 psi | 81% | 2907 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,001 psi | 63% | 2703 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,847 psi | 72% | 2812 fps | 97.8% |
| IMR 4831 | <<locked>> | 80% | 39,276 psi | 62% | 2717 fps | 98.6% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,792 psi | 80% | 2920 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 94% | 47,094 psi | 74% | 2953 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 52,446 psi | 82% | 2907 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,511 psi | 68% | 2762 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 41,742 psi | 65% | 2743 fps | 97.1% |
| Lovex S071 | <<locked>> | 88% | 33,852 psi | 53% | 2582 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 52,968 psi | 83% | 2959 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,496 psi | 67% | 2792 fps | 95.1% |
| Norma MRP | 75.1 gr | 86% | 39,030 psi | 61% | 2805 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 40,582 psi | 64% | 2759 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 53,824 psi | 84% | 2982 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 47,123 psi | 74% | 2963 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 39,378 psi | 62% | 2746 fps | 97% |
| Ramshot Magnum | <<locked>> | 92% | 39,015 psi | 61% | 2762 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,021 psi | 44% | 1742 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,010 psi | 80% | 2910 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,080 psi | 75% | 2963 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,828 psi | 64% | 2785 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,392 psi | 62% | 2795 fps | 98.2% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 38,885 psi | 61% | 2838 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 54,172 psi | 85% | 2917 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,037 psi | 75% | 2858 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,615 psi | 73% | 2851 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 86% | 41,162 psi | 65% | 2785 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 44,527 psi | 70% | 2782 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,511 psi | 68% | 2762 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 52,446 psi | 82% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,742 psi | 65% | 2743 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,269 psi | 77% | 2913 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,776 psi | 76% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,554 psi | 67% | 2703 fps | 97.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 43,526 psi | 68% | 2838 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 48,182 psi | 76% | 2858 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,053 psi | 80% | 2900 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 37,101 psi | 58% | 2717 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 39,088 psi | 61% | 2707 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 46,006 psi | 72% | 2782 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,945 psi | 66% | 2759 fps | 99% |
| Vihtavuori N165 | <<locked>> | 90% | 41,249 psi | 65% | 2746 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 53,055 psi | 83% | 2884 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,437 psi | 65% | 2759 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 32,576 psi | 51% | 2598 fps | 97.1% |
| Vihtavuori N560 | 80.3 gr | 92% | 48,399 psi | 76% | 2989 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 98% | 47,848 psi | 75% | 2963 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,988 psi | 64% | 2723 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 42,917 psi | 67% | 2818 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,889 psi | 41% | 2490 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 90% | 44,092 psi | 69% | 2812 fps | 95.8% |
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 83 powders for .300 Weath. Mag. loaded with the .307 | 165gr | Rhino Solid Shank. Alliant Reloder-26 delivers the highest muzzle velocity at 3,179 fps; across all powders the maximum-charge window runs from 1,900 fps to 3,179 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 83 of the 83 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 165.0 gr projectile in 0.307" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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 .307 | 165gr | Rhino Solid Shank 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.