Load Specifications
Load data in caliber 7 mm STW with .284 | 140gr | Barnes TTSX BT bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Norma MRP and Ramshot Grand.
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% | 57,276 psi | 86% | 3012 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 58,363 psi | 87% | 3051 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 56,420 psi | 85% | 3110 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 82% | 58,697 psi | 88% | 3012 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 59,567 psi | 89% | 3114 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 94% | 57,653 psi | 86% | 3120 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,735 psi | 78% | 3009 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,224 psi | 69% | 2963 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 59,712 psi | 90% | 3107 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 60,292 psi | 90% | 3031 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 59,408 psi | 89% | 3110 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,782 psi | 85% | 3068 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 58,943 psi | 88% | 3100 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,682 psi | 86% | 3110 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 58,972 psi | 88% | 3081 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 58,624 psi | 88% | 3143 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 60,147 psi | 90% | 3176 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 58,943 psi | 88% | 3071 fps | 96.9% |
| Bofors RP15 | <<locked>> | 96% | 56,550 psi | 85% | 3094 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,520 psi | 82% | 3081 fps | 98.9% |
| Bofors RP5 | <<locked>> | 94% | 57,682 psi | 86% | 3110 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 60,336 psi | 90% | 3054 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,406 psi | 86% | 3107 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 86% | 60,263 psi | 90% | 3110 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 58,798 psi | 88% | 3068 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 57,217 psi | 86% | 3051 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 60,176 psi | 90% | 3097 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 59,567 psi | 89% | 3025 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 57,479 psi | 86% | 3219 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,130 psi | 86% | 3087 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,927 psi | 55% | 1949 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 58,595 psi | 88% | 3038 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 58,233 psi | 87% | 3025 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 58,566 psi | 88% | 3038 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,928 psi | 87% | 3035 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 96% | 59,524 psi | 89% | 3156 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 58,842 psi | 88% | 3018 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,927 psi | 85% | 3012 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 58,537 psi | 88% | 3028 fps | 100% |
| Norma 204 | <<locked>> | 88% | 60,118 psi | 90% | 3100 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 41,684 psi | 62% | 2877 fps | 98.1% |
| Norma MRP | <<locked>> | 92% | 57,508 psi | 86% | 3130 fps | 100% |
| Norma URP | <<locked>> | 86% | 56,594 psi | 85% | 3031 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,405 psi | 85% | 3114 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 59,582 psi | 89% | 3094 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 59,248 psi | 89% | 3107 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,855 psi | 57% | 1995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 58,653 psi | 88% | 3071 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,290 psi | 86% | 3104 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 59,001 psi | 88% | 3219 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,693 psi | 80% | 3091 fps | 97.7% |
| Rottweil R 903 | <<locked>> | 82% | 57,841 psi | 87% | 2995 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 56,724 psi | 85% | 3025 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 92% | 58,624 psi | 88% | 3091 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 86% | 60,336 psi | 90% | 3054 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 58,842 psi | 88% | 3018 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,927 psi | 85% | 3012 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 59,828 psi | 90% | 3058 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,609 psi | 86% | 2867 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 58,059 psi | 87% | 2972 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 58,175 psi | 87% | 3084 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 57,450 psi | 86% | 2989 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 58,421 psi | 88% | 3009 fps | 98.5% |
| Somchem S365 | <<locked>> | 88% | 57,406 psi | 86% | 3035 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 58,871 psi | 88% | 3054 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 58,885 psi | 88% | 2959 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 58,537 psi | 88% | 3025 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 58,639 psi | 88% | 3035 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 57,696 psi | 86% | 3028 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,072 psi | 86% | 3054 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,203 psi | 86% | 3127 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 98% | 57,377 psi | 86% | 3100 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,476 psi | 82% | 3097 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 58,494 psi | 88% | 2979 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,420 psi | 85% | 3054 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,812 psi | 87% | 3163 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 59,379 psi | 89% | 3058 fps | 99.7% |
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% | 35,099 psi | 53% | 2602 fps | 97.1% |
| Accurate 4350 | <<locked>> | 80% | 47,282 psi | 71% | 2877 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 45,353 psi | 68% | 2907 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 55,230 psi | 83% | 2959 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 39,392 psi | 59% | 2743 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 86% | 43,294 psi | 65% | 2854 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 94% | 41,887 psi | 63% | 2812 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 90% | 32,808 psi | 49% | 2635 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,871 psi | 60% | 2746 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 56,507 psi | 85% | 2979 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,426 psi | 68% | 2887 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,808 psi | 79% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,508 psi | 59% | 2736 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 82% | 37,869 psi | 57% | 2733 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,895 psi | 51% | 2635 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,312 psi | 44% | 2526 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,507 psi | 56% | 2776 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 51,880 psi | 78% | 2949 fps | 95.2% |
| Bofors RP15 | <<locked>> | 84% | 37,521 psi | 56% | 2720 fps | 95.1% |
| Bofors RP30 | <<locked>> | 92% | 40,930 psi | 61% | 2822 fps | 95.7% |
| Bofors RP5 | <<locked>> | 82% | 37,869 psi | 57% | 2733 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 49,792 psi | 75% | 2884 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 39,972 psi | 60% | 2772 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 48,979 psi | 73% | 2927 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 51,634 psi | 77% | 2949 fps | 99% |
| Hodgdon H4831 | <<locked>> | 84% | 43,337 psi | 65% | 2802 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 86% | 45,426 psi | 68% | 2844 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,743 psi | 64% | 2762 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 37,753 psi | 57% | 2812 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 49,211 psi | 74% | 2956 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,630 psi | 41% | 1745 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,208 psi | 68% | 2808 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,242 psi | 77% | 2913 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 44,788 psi | 67% | 2818 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,730 psi | 67% | 2802 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 86% | 41,713 psi | 63% | 2828 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 48,689 psi | 73% | 2858 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 47,021 psi | 70% | 2844 fps | 99.2% |
| Lovex S071 | <<locked>> | 82% | 32,111 psi | 48% | 2526 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 45,542 psi | 68% | 2851 fps | 97.5% |
| Norma 217 | <<locked>> | 94% | 33,736 psi | 51% | 2680 fps | 95% |
| Norma MRP | 67.3 gr | 80% | 37,072 psi | 56% | 2736 fps | 96.6% |
| Norma URP | <<locked>> | 80% | 46,427 psi | 70% | 2864 fps | 100% |
| Ramshot Grand | 71.7 gr | 86% | 41,568 psi | 62% | 2835 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 45,397 psi | 68% | 2858 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 37,043 psi | 56% | 2703 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,210 psi | 42% | 1788 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,340 psi | 71% | 2894 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,861 psi | 69% | 2917 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 34,577 psi | 52% | 2713 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 45,701 psi | 69% | 2946 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 54,331 psi | 81% | 2946 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 40,625 psi | 61% | 2720 fps | 95% |
| Rottweil R 905 | <<locked>> | 80% | 38,769 psi | 58% | 2720 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 49,792 psi | 75% | 2884 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,689 psi | 73% | 2858 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 47,021 psi | 70% | 2844 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 56,072 psi | 84% | 3002 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,157 psi | 81% | 2822 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,616 psi | 71% | 2802 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,435 psi | 58% | 2717 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 54,027 psi | 81% | 2940 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 44,541 psi | 67% | 2772 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 43,395 psi | 65% | 2815 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,291 psi | 59% | 2703 fps | 96.9% |
| Vihtavuori N150 | <<locked>> | 80% | 51,822 psi | 78% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,906 psi | 72% | 2861 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 36,463 psi | 55% | 2628 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 47,253 psi | 71% | 2861 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,884 psi | 57% | 2710 fps | 99.4% |
| Vihtavuori N560 | 70.6 gr | 84% | 42,975 psi | 64% | 2858 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 90% | 43,265 psi | 65% | 2844 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 96% | 46,847 psi | 70% | 2959 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,297 psi | 71% | 2815 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,197 psi | 74% | 2930 fps | 99.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,095 psi | 45% | 2641 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 38,653 psi | 58% | 2687 fps | 95.7% |
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 77 powders for 7 mm STW loaded with the .284 | 140gr | Barnes TTSX BT. 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 77 of the 77 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 140.0 gr projectile in 0.284" calls for a 1:10.0 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. Vihtavuori N560, Norma MRP, Ramshot Grand rank at the top here: for 7 mm STW with the .284 | 140gr | Barnes TTSX 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.