Load Specifications
Load data in caliber 7 mm STW with .284 | 140gr | Peregrine VLR-4 bullet and 76 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 57,145 psi | 86% | 3012 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 58,160 psi | 87% | 3048 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 56,043 psi | 84% | 3107 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 82% | 58,537 psi | 88% | 3009 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 59,466 psi | 89% | 3114 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 94% | 57,261 psi | 86% | 3114 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,416 psi | 77% | 3002 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,108 psi | 69% | 2959 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 60,133 psi | 90% | 3031 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 59,205 psi | 89% | 3107 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,637 psi | 85% | 3064 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 58,813 psi | 88% | 3097 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,305 psi | 86% | 3107 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 58,581 psi | 88% | 3074 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 58,479 psi | 88% | 3140 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 59,741 psi | 90% | 3169 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 58,900 psi | 88% | 3071 fps | 96.8% |
| Bofors RP15 | <<locked>> | 98% | 60,365 psi | 90% | 3150 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,143 psi | 81% | 3077 fps | 98.9% |
| Bofors RP5 | <<locked>> | 94% | 57,305 psi | 86% | 3107 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 60,162 psi | 90% | 3054 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,072 psi | 86% | 3100 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 86% | 60,089 psi | 90% | 3107 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 58,668 psi | 88% | 3064 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 57,072 psi | 86% | 3051 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 59,843 psi | 90% | 3094 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 59,408 psi | 89% | 3025 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,377 psi | 86% | 3219 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,014 psi | 85% | 3084 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,072 psi | 56% | 1949 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 58,479 psi | 88% | 3035 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 58,102 psi | 87% | 3022 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 58,436 psi | 88% | 3038 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,827 psi | 87% | 3031 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 96% | 59,146 psi | 89% | 3150 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 58,668 psi | 88% | 3018 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,782 psi | 85% | 3012 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 58,146 psi | 87% | 3025 fps | 100% |
| Norma 204 | <<locked>> | 88% | 59,959 psi | 90% | 3097 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 41,539 psi | 62% | 2874 fps | 98.1% |
| Norma MRP | <<locked>> | 92% | 57,348 psi | 86% | 3127 fps | 100% |
| Norma URP | <<locked>> | 88% | 60,321 psi | 90% | 3084 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,014 psi | 84% | 3107 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 59,437 psi | 89% | 3091 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 59,117 psi | 89% | 3107 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,826 psi | 57% | 1995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 58,537 psi | 88% | 3074 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,145 psi | 86% | 3100 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 58,639 psi | 88% | 3215 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,374 psi | 80% | 3087 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 57,682 psi | 86% | 2995 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 60,220 psi | 90% | 3077 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 92% | 58,233 psi | 87% | 3087 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 86% | 60,162 psi | 90% | 3054 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 58,668 psi | 88% | 3018 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,782 psi | 85% | 3012 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 59,683 psi | 89% | 3054 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,464 psi | 86% | 2864 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,899 psi | 87% | 2969 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,783 psi | 87% | 3081 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 57,290 psi | 86% | 2989 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 58,334 psi | 87% | 3012 fps | 98.5% |
| Somchem S365 | <<locked>> | 88% | 57,261 psi | 86% | 3035 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 58,755 psi | 88% | 3054 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 58,726 psi | 88% | 2956 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 58,363 psi | 87% | 3025 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 58,537 psi | 88% | 3031 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 57,551 psi | 86% | 3028 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,695 psi | 85% | 3051 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,087 psi | 86% | 3123 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 98% | 57,000 psi | 85% | 3097 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,114 psi | 81% | 3094 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 58,175 psi | 87% | 2972 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 60,089 psi | 90% | 3107 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,348 psi | 86% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 59,016 psi | 88% | 3051 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% | 34,954 psi | 52% | 2598 fps | 97.1% |
| Accurate 4350 | <<locked>> | 80% | 47,123 psi | 71% | 2874 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 45,020 psi | 67% | 2904 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 55,071 psi | 83% | 2959 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 39,262 psi | 59% | 2740 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 86% | 43,163 psi | 65% | 2851 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 94% | 41,785 psi | 63% | 2812 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 90% | 32,721 psi | 49% | 2631 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 56,347 psi | 84% | 2979 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,266 psi | 68% | 2884 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,649 psi | 79% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,378 psi | 59% | 2736 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,695 psi | 56% | 2730 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,750 psi | 51% | 2631 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,196 psi | 44% | 2523 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,362 psi | 56% | 2772 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 51,837 psi | 78% | 2949 fps | 95.1% |
| Bofors RP15 | <<locked>> | 84% | 37,391 psi | 56% | 2720 fps | 95% |
| Bofors RP30 | <<locked>> | 92% | 40,814 psi | 61% | 2822 fps | 95.7% |
| Bofors RP5 | <<locked>> | 82% | 37,695 psi | 56% | 2730 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 49,647 psi | 74% | 2881 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 39,885 psi | 60% | 2772 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 48,834 psi | 73% | 2923 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 51,271 psi | 77% | 2943 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 84% | 43,018 psi | 64% | 2795 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 86% | 45,295 psi | 68% | 2841 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,583 psi | 64% | 2759 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 37,637 psi | 56% | 2808 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 48,878 psi | 73% | 2949 fps | 99.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,572 psi | 41% | 1745 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,063 psi | 68% | 2805 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,111 psi | 77% | 2910 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 44,643 psi | 67% | 2815 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,614 psi | 67% | 2799 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 86% | 41,597 psi | 62% | 2828 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 48,544 psi | 73% | 2854 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 46,876 psi | 70% | 2841 fps | 99.2% |
| Lovex S071 | <<locked>> | 82% | 31,981 psi | 48% | 2523 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 45,223 psi | 68% | 2844 fps | 97.4% |
| Norma 217 | <<locked>> | 96% | 35,955 psi | 54% | 2743 fps | 96.1% |
| Norma MRP | 67 gr | 80% | 36,767 psi | 55% | 2733 fps | 96.5% |
| Norma URP | <<locked>> | 80% | 46,267 psi | 69% | 2864 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 41,437 psi | 62% | 2835 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 45,049 psi | 68% | 2854 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 36,927 psi | 55% | 2700 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,297 psi | 42% | 1788 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,195 psi | 71% | 2894 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,513 psi | 68% | 2910 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 34,330 psi | 51% | 2707 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 45,368 psi | 68% | 2940 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 54,157 psi | 81% | 2943 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 43,323 psi | 65% | 2782 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 80% | 38,624 psi | 58% | 2717 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 49,647 psi | 74% | 2881 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,544 psi | 73% | 2854 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 46,876 psi | 70% | 2841 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 55,695 psi | 83% | 2999 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,983 psi | 81% | 2818 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,485 psi | 71% | 2802 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,290 psi | 57% | 2713 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 53,853 psi | 81% | 2936 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 44,411 psi | 67% | 2769 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 43,236 psi | 65% | 2812 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,986 psi | 58% | 2697 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 80% | 51,663 psi | 77% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,747 psi | 72% | 2858 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 36,332 psi | 54% | 2628 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 46,905 psi | 70% | 2858 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 37,739 psi | 57% | 2710 fps | 99.4% |
| Vihtavuori N560 | 70.4 gr | 84% | 42,815 psi | 64% | 2858 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 90% | 42,960 psi | 64% | 2838 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 96% | 46,731 psi | 70% | 2956 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,949 psi | 70% | 2812 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,052 psi | 74% | 2930 fps | 99.4% |
| Winchester StaBALL HD | 66.3 gr | 80% | 29,849 psi | 45% | 2635 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 38,508 psi | 58% | 2684 fps | 95.6% |
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 81 powders for 7 mm STW loaded with the .284 | 140gr | Peregrine VLR-4. Hodgdon Retumbo delivers the highest muzzle velocity at 3,219 fps; across all powders the maximum-charge window runs from 1,949 fps to 3,219 fps. ADI AR 2217 gives the best case fill at 100 %, and 81 of the 81 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (460 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:9.0 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 | 140gr | Peregrine VLR-4 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, Vihtavuori N170 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.