Load Specifications
Load data in caliber 7 mm WSM with .284 | 140gr | Sierra Pro-Hunter bullet and 85 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Vihtavuori N560.
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% | 55,071 psi | 86% | 2949 fps | 98.8% |
| Accurate 3100 | <<locked>> | 98% | 53,998 psi | 85% | 3002 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 54,708 psi | 86% | 2936 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,927 psi | 88% | 3054 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 56,347 psi | 88% | 3150 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 84% | 54,447 psi | 85% | 2969 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,855 psi | 89% | 3100 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 98% | 54,317 psi | 85% | 3087 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,535 psi | 87% | 2995 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,753 psi | 87% | 3018 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,492 psi | 89% | 3110 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,027 psi | 85% | 3074 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,086 psi | 88% | 3084 fps | 98.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,377 psi | 90% | 3150 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,447 psi | 85% | 3074 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,137 psi | 74% | 2999 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,650 psi | 86% | 3159 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,533 psi | 82% | 3064 fps | 97.9% |
| Bofors RP3 | <<locked>> | 84% | 56,579 psi | 89% | 3012 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,377 psi | 90% | 3150 fps | 98.8% |
| Bofors RP7 | <<locked>> | 88% | 55,738 psi | 87% | 2999 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 56,724 psi | 89% | 3028 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,244 psi | 85% | 3048 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 88% | 57,435 psi | 90% | 3064 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 96% | 54,592 psi | 86% | 3031 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,072 psi | 89% | 3074 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,840 psi | 89% | 3028 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,006 psi | 72% | 3031 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 88% | 54,433 psi | 85% | 3081 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,506 psi | 57% | 1893 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,363 psi | 90% | 3002 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,362 psi | 88% | 2986 fps | 99.4% |
| IMR 4350 | <<locked>> | 92% | 56,826 psi | 89% | 3031 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,334 psi | 90% | 3028 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 56,086 psi | 88% | 3041 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,217 psi | 90% | 3048 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,130 psi | 88% | 3022 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,666 psi | 87% | 3127 fps | 97.4% |
| Lovex S062 | <<locked>> | 82% | 54,259 psi | 85% | 2943 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,435 psi | 90% | 3022 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 55,506 psi | 87% | 3015 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,950 psi | 75% | 2900 fps | 99% |
| Norma 203B | <<locked>> | 82% | 55,056 psi | 86% | 3002 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,099 psi | 85% | 3028 fps | 97.9% |
| Norma MRP | <<locked>> | 98% | 57,145 psi | 90% | 3173 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 54,447 psi | 85% | 3035 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,724 psi | 87% | 3025 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,362 psi | 88% | 3146 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 56,855 psi | 89% | 3091 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,357 psi | 79% | 3012 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,318 psi | 58% | 1942 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,608 psi | 89% | 3015 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,377 psi | 90% | 3123 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,651 psi | 87% | 3071 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,056 psi | 85% | 3100 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,267 psi | 73% | 3028 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 82% | 56,072 psi | 88% | 2956 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,695 psi | 89% | 3009 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,650 psi | 86% | 3009 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 55,376 psi | 87% | 3071 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 55,738 psi | 87% | 2999 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,435 psi | 90% | 3022 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 54,259 psi | 85% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,506 psi | 87% | 3015 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,447 psi | 85% | 3012 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,174 psi | 90% | 2884 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,130 psi | 90% | 2972 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,897 psi | 86% | 3064 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 56,333 psi | 88% | 3002 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,594 psi | 89% | 3002 fps | 96.8% |
| Somchem S365 | <<locked>> | 92% | 54,041 psi | 85% | 3038 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,985 psi | 88% | 3045 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 82% | 56,681 psi | 89% | 2913 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,710 psi | 89% | 2927 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,682 psi | 90% | 2972 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,492 psi | 89% | 3028 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,477 psi | 87% | 3018 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 55,027 psi | 86% | 2923 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,535 psi | 87% | 3031 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,985 psi | 89% | 3100 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,203 psi | 90% | 3163 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,144 psi | 88% | 2989 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,244 psi | 85% | 3048 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,140 psi | 79% | 3143 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,115 psi | 88% | 3038 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% | 51,677 psi | 81% | 2894 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 33,417 psi | 52% | 2589 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 51,488 psi | 81% | 2887 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,639 psi | 62% | 2753 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 96% | 52,388 psi | 82% | 3081 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 48,298 psi | 76% | 2864 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 43,656 psi | 68% | 2854 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 47,442 psi | 74% | 2956 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,994 psi | 77% | 2887 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,228 psi | 82% | 2959 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,232 psi | 60% | 2759 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,714 psi | 69% | 2894 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 43,294 psi | 68% | 2844 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 41,075 psi | 64% | 2838 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,239 psi | 44% | 2503 fps | 96.6% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,082 psi | 50% | 2631 fps | 95% |
| Alliant Reloder-26 | 59.3 gr | 80% | 30,240 psi | 47% | 2618 fps | 95% |
| Bofors RP15 | <<locked>> | 94% | 43,149 psi | 68% | 2881 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 49,516 psi | 78% | 2900 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 41,075 psi | 64% | 2838 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 43,395 psi | 68% | 2769 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 80% | 49,763 psi | 78% | 2913 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 41,452 psi | 65% | 2802 fps | 96.8% |
| Hodgdon H4350 | <<locked>> | 80% | 44,324 psi | 69% | 2825 fps | 96.2% |
| Hodgdon H4831 | <<locked>> | 94% | 50,981 psi | 80% | 2972 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 49,821 psi | 78% | 2949 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,940 psi | 56% | 2651 fps | 99.2% |
| Hodgdon Retumbo | <<locked>> | 96% | 40,538 psi | 64% | 2900 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 40,538 psi | 64% | 2812 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,354 psi | 43% | 1696 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,792 psi | 80% | 2897 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,895 psi | 83% | 2930 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 38,957 psi | 61% | 2690 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,628 psi | 70% | 2799 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 37,942 psi | 59% | 2700 fps | 98.4% |
| IMR 4895 | <<locked>> | 80% | 53,606 psi | 84% | 2989 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 49,356 psi | 77% | 2904 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 96% | 48,559 psi | 76% | 2995 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 51,082 psi | 80% | 2894 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,279 psi | 66% | 2746 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 40,553 psi | 64% | 2726 fps | 96.7% |
| Lovex S071 | <<locked>> | 90% | 34,795 psi | 55% | 2621 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 51,619 psi | 81% | 2946 fps | 100% |
| Norma 204 | <<locked>> | 84% | 44,034 psi | 69% | 2841 fps | 95.6% |
| Norma MRP | 61.9 gr | 86% | 37,536 psi | 59% | 2785 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 39,247 psi | 62% | 2746 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 80% | 52,228 psi | 82% | 2969 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 45,339 psi | 71% | 2940 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 38,116 psi | 60% | 2733 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 94% | 40,321 psi | 63% | 2808 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,963 psi | 44% | 1739 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,632 psi | 78% | 2897 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,427 psi | 73% | 2949 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,334 psi | 62% | 2769 fps | 98.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,087 psi | 60% | 2779 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 37,478 psi | 59% | 2815 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 52,808 psi | 83% | 2907 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,630 psi | 73% | 2848 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 48,138 psi | 75% | 2890 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 88% | 42,395 psi | 66% | 2828 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 43,395 psi | 68% | 2769 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,279 psi | 66% | 2746 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 51,082 psi | 80% | 2894 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,553 psi | 64% | 2726 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,819 psi | 75% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,558 psi | 75% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,350 psi | 65% | 2690 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 42,018 psi | 66% | 2822 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 46,775 psi | 73% | 2841 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,400 psi | 77% | 2881 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 35,810 psi | 56% | 2703 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 40,466 psi | 63% | 2753 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 80% | 53,287 psi | 84% | 2864 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,374 psi | 84% | 2881 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,730 psi | 70% | 2769 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,669 psi | 64% | 2746 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 39,827 psi | 62% | 2730 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 51,634 psi | 81% | 2874 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,118 psi | 63% | 2746 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 31,328 psi | 49% | 2585 fps | 96.8% |
| Vihtavuori N560 | 67.7 gr | 94% | 50,024 psi | 78% | 3038 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,755 psi | 62% | 2713 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 41,640 psi | 65% | 2805 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,990 psi | 39% | 2470 fps | 95.2% |
| Winchester Supreme 780 | <<locked>> | 90% | 42,554 psi | 67% | 2792 fps | 95.4% |
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 94 powders for 7 mm WSM loaded with the .284 | 140gr | Sierra Pro-Hunter. Norma MRP delivers the highest muzzle velocity at 3,173 fps; across all powders the maximum-charge window runs from 1,893 fps to 3,173 fps. ADI AR 2217 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-22 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. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for 7 mm WSM with the .284 | 140gr | Sierra Pro-Hunter they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Bofors RP30 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.