Load Specifications
Load data in caliber 7 mm WSM with .284 | 145gr | Prvi Partizan SP bullet and 85 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% | 56,420 psi | 88% | 2927 fps | 99.2% |
| Accurate 3100 | <<locked>> | 98% | 55,738 psi | 87% | 2982 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 56,173 psi | 88% | 2907 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,392 psi | 90% | 3028 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,172 psi | 85% | 3068 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 55,738 psi | 87% | 2943 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,694 psi | 86% | 3022 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 98% | 55,941 psi | 88% | 3074 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,609 psi | 61% | 2776 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,927 psi | 89% | 2966 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,884 psi | 89% | 2989 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,404 psi | 85% | 3028 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,782 psi | 87% | 3051 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,696 psi | 90% | 3064 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,361 psi | 87% | 3071 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,043 psi | 88% | 3045 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,675 psi | 76% | 2986 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,840 psi | 89% | 3143 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,259 psi | 85% | 3051 fps | 98.5% |
| Bofors RP3 | <<locked>> | 82% | 54,128 psi | 85% | 2930 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,361 psi | 87% | 3071 fps | 98.8% |
| Bofors RP7 | <<locked>> | 88% | 56,840 psi | 89% | 2972 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,008 psi | 75% | 2920 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 82% | 54,520 psi | 85% | 2949 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,796 psi | 87% | 3025 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 54,998 psi | 86% | 2979 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 55,970 psi | 88% | 3012 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,853 psi | 86% | 2995 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,984 psi | 86% | 2953 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,514 psi | 74% | 3025 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 88% | 56,159 psi | 88% | 3061 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,622 psi | 57% | 1864 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,274 psi | 87% | 2923 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,638 psi | 90% | 2963 fps | 99.7% |
| IMR 4350 | <<locked>> | 90% | 54,723 psi | 86% | 2953 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,085 psi | 86% | 2946 fps | 99.4% |
| IMR 4831 | <<locked>> | 90% | 54,085 psi | 85% | 2963 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,276 psi | 90% | 2999 fps | 97.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,130 psi | 90% | 3107 fps | 98% |
| Lovex S062 | <<locked>> | 82% | 55,550 psi | 87% | 2917 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,492 psi | 87% | 2943 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 56,927 psi | 89% | 2989 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,530 psi | 78% | 2884 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 56,188 psi | 88% | 2972 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,637 psi | 87% | 3012 fps | 98.5% |
| Norma MRP | <<locked>> | 96% | 55,216 psi | 87% | 3097 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 55,970 psi | 88% | 3012 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,188 psi | 90% | 2999 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,954 psi | 85% | 3064 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 90% | 54,839 psi | 86% | 3012 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,141 psi | 82% | 2999 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,463 psi | 59% | 1913 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,201 psi | 85% | 2930 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,042 psi | 86% | 3038 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,392 psi | 90% | 3051 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,709 psi | 87% | 3077 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,877 psi | 75% | 3025 fps | 99.1% |
| Rottweil R 902 | <<locked>> | 82% | 57,406 psi | 90% | 2927 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,476 psi | 85% | 2930 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,159 psi | 88% | 2989 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 96% | 57,101 psi | 89% | 3051 fps | 99% |
| Rottweil R 907 | <<locked>> | 88% | 56,840 psi | 89% | 2972 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,492 psi | 87% | 2943 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 55,550 psi | 87% | 2917 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,927 psi | 89% | 2989 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,956 psi | 88% | 2989 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,027 psi | 86% | 2808 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,853 psi | 86% | 2894 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,623 psi | 89% | 3048 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 54,418 psi | 85% | 2923 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,317 psi | 85% | 2923 fps | 96.7% |
| Somchem S365 | <<locked>> | 92% | 55,782 psi | 87% | 3012 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,667 psi | 90% | 3025 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 86% | 55,405 psi | 87% | 2894 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,375 psi | 85% | 2949 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,913 psi | 89% | 2995 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 56,333 psi | 88% | 2894 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,101 psi | 89% | 3009 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,042 psi | 86% | 3022 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,230 psi | 87% | 3087 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,778 psi | 80% | 2989 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,725 psi | 90% | 2963 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,796 psi | 87% | 3025 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,475 psi | 82% | 3123 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 53,969 psi | 85% | 2959 fps | 98.4% |
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% | 52,910 psi | 83% | 2871 fps | 98.8% |
| Accurate 3100 | <<locked>> | 82% | 32,271 psi | 51% | 2520 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 52,866 psi | 83% | 2861 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,901 psi | 64% | 2740 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 94% | 50,343 psi | 79% | 3002 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 49,211 psi | 77% | 2835 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,989 psi | 66% | 2776 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 92% | 45,658 psi | 72% | 2881 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 98% | 36,201 psi | 57% | 2713 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,256 psi | 79% | 2861 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,577 psi | 84% | 2936 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,320 psi | 62% | 2743 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,136 psi | 71% | 2874 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,742 psi | 65% | 2769 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,264 psi | 66% | 2822 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,138 psi | 46% | 2493 fps | 97.5% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,924 psi | 52% | 2621 fps | 96% |
| Alliant Reloder-26 | 59.3 gr | 80% | 31,314 psi | 49% | 2612 fps | 96.1% |
| Bofors RP15 | <<locked>> | 92% | 41,684 psi | 65% | 2808 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 50,908 psi | 80% | 2877 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,264 psi | 66% | 2822 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 44,266 psi | 69% | 2746 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 98% | 44,846 psi | 70% | 2858 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 51,068 psi | 80% | 2890 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 42,656 psi | 67% | 2782 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 45,513 psi | 71% | 2805 fps | 97% |
| Hodgdon H4831 | <<locked>> | 92% | 48,863 psi | 77% | 2887 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 47,921 psi | 75% | 2871 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,072 psi | 58% | 2635 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,160 psi | 61% | 2828 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 41,756 psi | 65% | 2802 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 43% | 1670 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,793 psi | 81% | 2867 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,070 psi | 85% | 2904 fps | 99.4% |
| IMR 4350 | <<locked>> | 80% | 39,972 psi | 63% | 2674 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,730 psi | 72% | 2776 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 39,073 psi | 61% | 2684 fps | 98.9% |
| IMR 4955 Enduron | <<locked>> | 90% | 47,514 psi | 74% | 2828 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 94% | 46,746 psi | 73% | 2917 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 52,330 psi | 82% | 2867 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,352 psi | 68% | 2730 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 41,626 psi | 65% | 2710 fps | 97.4% |
| Lovex S071 | <<locked>> | 88% | 33,736 psi | 53% | 2556 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 52,939 psi | 83% | 2920 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,366 psi | 66% | 2762 fps | 95.5% |
| Norma MRP | 60.4 gr | 84% | 36,056 psi | 56% | 2707 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 40,451 psi | 63% | 2730 fps | 99% |
| Ramshot Big Game | <<locked>> | 80% | 53,621 psi | 84% | 2946 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 43,453 psi | 68% | 2861 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 39,262 psi | 62% | 2717 fps | 97.4% |
| Ramshot Magnum | <<locked>> | 92% | 38,667 psi | 61% | 2730 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,920 psi | 44% | 1706 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,850 psi | 80% | 2874 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,921 psi | 75% | 2927 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,654 psi | 64% | 2756 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,247 psi | 62% | 2766 fps | 98.5% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,056 psi | 56% | 2740 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 54,085 psi | 85% | 2877 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,906 psi | 75% | 2822 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,296 psi | 73% | 2812 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 86% | 40,857 psi | 64% | 2753 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 44,266 psi | 69% | 2746 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,352 psi | 68% | 2730 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 52,330 psi | 82% | 2867 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,626 psi | 65% | 2710 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,153 psi | 77% | 2877 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,675 psi | 76% | 2717 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,409 psi | 66% | 2671 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,480 psi | 63% | 2743 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 48,022 psi | 75% | 2818 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 47,427 psi | 74% | 2802 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 37,057 psi | 58% | 2687 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 38,841 psi | 61% | 2677 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 45,905 psi | 72% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,858 psi | 66% | 2726 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 38,421 psi | 60% | 2657 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 52,910 psi | 83% | 2844 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,292 psi | 65% | 2730 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 32,460 psi | 51% | 2575 fps | 97.6% |
| Vihtavuori N560 | 66.2 gr | 92% | 48,051 psi | 75% | 2953 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 98% | 47,456 psi | 74% | 2927 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,857 psi | 64% | 2694 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,859 psi | 67% | 2789 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,802 psi | 40% | 2470 fps | 96.6% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,959 psi | 64% | 2720 fps | 95.3% |
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 91 powders for 7 mm WSM loaded with the .284 | 145gr | Prvi Partizan SP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,143 fps; across all powders the maximum-charge window runs from 1,864 fps to 3,143 fps. ADI AR 2217 gives the best case fill at 100 %, and 91 of the 91 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 145.0 gr projectile in 0.284" calls for a 1:13.0 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 7 mm WSM with the .284 | 145gr | Prvi Partizan SP 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.