Load Specifications
Load data in caliber 7 mm STW with .284 | 139gr | Barnes LRX BT bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Vihtavuori N560 and Norma MRP.
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 3100 | <<locked>> | 94% | 56,724 psi | 85% | 3012 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 57,740 psi | 87% | 3051 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 60,060 psi | 90% | 3176 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 82% | 58,392 psi | 88% | 3015 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 59,016 psi | 88% | 3114 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 56,855 psi | 85% | 3114 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,242 psi | 77% | 3009 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,759 psi | 69% | 2959 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 59,915 psi | 90% | 3120 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 59,915 psi | 90% | 3120 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 59,770 psi | 90% | 3035 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 59,030 psi | 88% | 3114 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,217 psi | 84% | 3068 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 58,378 psi | 88% | 3097 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,855 psi | 85% | 3107 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 58,117 psi | 87% | 3077 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,972 psi | 87% | 3140 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 59,205 psi | 89% | 3173 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 58,552 psi | 88% | 3071 fps | 96.7% |
| Bofors RP15 | <<locked>> | 98% | 59,886 psi | 90% | 3153 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,664 psi | 80% | 3077 fps | 98.8% |
| Bofors RP5 | <<locked>> | 94% | 56,855 psi | 85% | 3107 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 59,799 psi | 90% | 3054 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,608 psi | 85% | 3100 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 86% | 59,683 psi | 89% | 3110 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 58,262 psi | 87% | 3064 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 56,695 psi | 85% | 3051 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 59,393 psi | 89% | 3094 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 59,234 psi | 89% | 3028 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 56,869 psi | 85% | 3219 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 56,579 psi | 85% | 3087 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,912 psi | 55% | 1952 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 58,073 psi | 87% | 3038 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,725 psi | 87% | 3025 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 58,001 psi | 87% | 3038 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,450 psi | 86% | 3035 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 96% | 58,914 psi | 88% | 3156 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 58,320 psi | 87% | 3022 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 60,176 psi | 90% | 3071 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,957 psi | 87% | 3031 fps | 100% |
| Norma 204 | <<locked>> | 88% | 59,582 psi | 89% | 3100 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 41,147 psi | 62% | 2874 fps | 97.9% |
| Norma MRP | <<locked>> | 92% | 56,913 psi | 85% | 3130 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 59,872 psi | 90% | 3087 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 60,060 psi | 90% | 3179 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 88% | 59,001 psi | 88% | 3094 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 58,595 psi | 88% | 3104 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,855 psi | 57% | 2001 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 59,988 psi | 90% | 3110 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 58,073 psi | 87% | 3074 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,695 psi | 85% | 3104 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 58,117 psi | 87% | 3212 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,852 psi | 79% | 3087 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 82% | 57,508 psi | 86% | 2999 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 60,075 psi | 90% | 3084 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 92% | 57,798 psi | 87% | 3084 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 86% | 59,799 psi | 90% | 3054 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 58,320 psi | 87% | 3022 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 60,176 psi | 90% | 3071 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 59,263 psi | 89% | 3058 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,087 psi | 86% | 2871 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,522 psi | 86% | 2969 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,363 psi | 86% | 3081 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 57,130 psi | 86% | 2995 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,972 psi | 87% | 3012 fps | 98.4% |
| Somchem S365 | <<locked>> | 88% | 56,782 psi | 85% | 3035 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 58,349 psi | 87% | 3054 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 58,581 psi | 88% | 2963 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,972 psi | 87% | 3025 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 58,131 psi | 87% | 3035 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 57,145 psi | 86% | 3031 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 60,162 psi | 90% | 3107 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,637 psi | 85% | 3127 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 98% | 56,782 psi | 85% | 3100 fps | 98.6% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,882 psi | 81% | 3094 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,754 psi | 87% | 2979 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 59,944 psi | 90% | 3114 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 56,739 psi | 85% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 58,595 psi | 88% | 3054 fps | 99.6% |
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 3100 | <<locked>> | 80% | 34,664 psi | 52% | 2598 fps | 96.9% |
| Accurate 4350 | <<locked>> | 80% | 46,746 psi | 70% | 2874 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 48,225 psi | 72% | 2972 fps | 96% |
| ADI AR 2208 | <<locked>> | 80% | 54,708 psi | 82% | 2959 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 38,943 psi | 58% | 2740 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 86% | 42,815 psi | 64% | 2851 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 94% | 41,466 psi | 62% | 2808 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 92% | 34,708 psi | 52% | 2694 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,798 psi | 60% | 2749 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,798 psi | 60% | 2749 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 55,985 psi | 84% | 2982 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,875 psi | 67% | 2884 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,214 psi | 78% | 3009 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,073 psi | 59% | 2733 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,376 psi | 56% | 2730 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,417 psi | 50% | 2631 fps | 99.4% |
| Alliant Reloder-25 | <<locked>> | 82% | 31,009 psi | 46% | 2585 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,985 psi | 55% | 2772 fps | 98.8% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,897 psi | 82% | 3012 fps | 95.8% |
| Bofors RP15 | <<locked>> | 86% | 39,740 psi | 60% | 2779 fps | 95.8% |
| Bofors RP30 | <<locked>> | 92% | 40,408 psi | 61% | 2818 fps | 95.4% |
| Bofors RP5 | <<locked>> | 82% | 37,376 psi | 56% | 2730 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 49,313 psi | 74% | 2884 fps | 99% |
| Hodgdon H1000 | <<locked>> | 90% | 39,552 psi | 59% | 2772 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 48,660 psi | 73% | 2930 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 51,111 psi | 77% | 2946 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 45,934 psi | 69% | 2861 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 86% | 44,947 psi | 67% | 2841 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,250 psi | 63% | 2762 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 37,318 psi | 56% | 2805 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 48,689 psi | 73% | 2953 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,586 psi | 41% | 1752 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,759 psi | 67% | 2808 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,778 psi | 76% | 2913 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 44,483 psi | 67% | 2818 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,295 psi | 66% | 2799 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 86% | 41,234 psi | 62% | 2825 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 48,225 psi | 72% | 2858 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 46,543 psi | 70% | 2844 fps | 99.1% |
| Lovex S071 | <<locked>> | 82% | 31,691 psi | 48% | 2520 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 45,063 psi | 68% | 2848 fps | 97.2% |
| Norma 217 | <<locked>> | 96% | 35,607 psi | 53% | 2740 fps | 95.8% |
| Norma MRP | 67 gr | 80% | 36,593 psi | 55% | 2733 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 45,876 psi | 69% | 2864 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 41,075 psi | 62% | 2831 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 44,904 psi | 67% | 2858 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 86% | 36,593 psi | 55% | 2700 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,152 psi | 42% | 1791 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 55,680 psi | 83% | 3054 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,007 psi | 70% | 2897 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,324 psi | 68% | 2913 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 34,055 psi | 51% | 2707 fps | 95.5% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 44,976 psi | 67% | 2940 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 53,780 psi | 81% | 2946 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 43,207 psi | 65% | 2785 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 38,305 psi | 57% | 2717 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 49,313 psi | 74% | 2884 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,225 psi | 72% | 2858 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 46,543 psi | 70% | 2844 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 55,564 psi | 83% | 3005 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,664 psi | 80% | 2822 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,137 psi | 71% | 2802 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,985 psi | 57% | 2713 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 53,505 psi | 80% | 2940 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 44,121 psi | 66% | 2769 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 42,859 psi | 64% | 2815 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,841 psi | 58% | 2700 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 80% | 51,285 psi | 77% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,384 psi | 71% | 2861 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 36,027 psi | 54% | 2625 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 46,746 psi | 70% | 2861 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 37,376 psi | 56% | 2710 fps | 99.3% |
| Vihtavuori N560 | 72 gr | 86% | 45,701 psi | 69% | 2923 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 90% | 42,772 psi | 64% | 2844 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 96% | 46,296 psi | 69% | 2956 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,804 psi | 70% | 2818 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,660 psi | 73% | 2930 fps | 99.3% |
| Winchester StaBALL HD | 66.3 gr | 80% | 29,704 psi | 45% | 2638 fps | 99.5% |
| Winchester Supreme 780 | <<locked>> | 82% | 38,203 psi | 57% | 2684 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 79 powders for 7 mm STW loaded with the .284 | 139gr | Barnes LRX BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,219 fps; across all powders the maximum-charge window runs from 1,952 fps to 3,219 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (460 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.284" calls for a 1:9.5 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. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for 7 mm STW with the .284 | 139gr | Barnes LRX BT 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.