Load Specifications
Load data in caliber 7 mm STW with .284 | 140gr | Speer TBBC bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 57,508 psi | 86% | 3012 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 58,044 psi | 87% | 3045 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 60,350 psi | 90% | 3173 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 90% | 59,045 psi | 89% | 3107 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 57,087 psi | 86% | 3107 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,463 psi | 83% | 3074 fps | 99.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,879 psi | 75% | 3028 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 59,161 psi | 89% | 3100 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 58,987 psi | 88% | 3100 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 58,508 psi | 88% | 3091 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,392 psi | 86% | 3104 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 58,784 psi | 88% | 3071 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 58,769 psi | 88% | 3136 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 59,973 psi | 90% | 3163 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 58,233 psi | 87% | 3064 fps | 97% |
| Bofors RP15 | <<locked>> | 96% | 60,263 psi | 90% | 3146 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 58,740 psi | 88% | 3143 fps | 99.5% |
| Bofors RP5 | <<locked>> | 92% | 57,392 psi | 86% | 3104 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 59,524 psi | 89% | 3045 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 57,043 psi | 86% | 3100 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 59,495 psi | 89% | 3097 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 58,015 psi | 87% | 3054 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 90% | 56,652 psi | 85% | 3041 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 59,451 psi | 89% | 3087 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 59,146 psi | 89% | 3018 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,580 psi | 86% | 3219 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,608 psi | 85% | 3074 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,246 psi | 56% | 1965 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,957 psi | 87% | 3028 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,203 psi | 86% | 3009 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 58,305 psi | 87% | 3035 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,305 psi | 86% | 3025 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 94% | 59,248 psi | 89% | 3150 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,252 psi | 68% | 2923 fps | 97.1% |
| Lovex S065 | <<locked>> | 84% | 58,204 psi | 87% | 3009 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 60,220 psi | 90% | 3061 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 58,682 psi | 88% | 3028 fps | 100% |
| Norma 204 | <<locked>> | 86% | 59,321 psi | 89% | 3087 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 45,847 psi | 69% | 2956 fps | 99.1% |
| Norma MRP | <<locked>> | 90% | 57,566 psi | 86% | 3127 fps | 100% |
| Norma URP | <<locked>> | 86% | 60,031 psi | 90% | 3081 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,289 psi | 84% | 3110 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 59,001 psi | 88% | 3084 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 59,248 psi | 89% | 3100 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,218 psi | 57% | 2011 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 58,407 psi | 88% | 3064 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,869 psi | 85% | 3094 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 59,074 psi | 89% | 3212 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 58,392 psi | 88% | 3166 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 90% | 59,944 psi | 90% | 3074 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 90% | 58,044 psi | 87% | 3081 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 59,524 psi | 89% | 3045 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 58,204 psi | 87% | 3009 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 60,220 psi | 90% | 3061 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 60,133 psi | 90% | 2897 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,421 psi | 86% | 2963 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 57,624 psi | 86% | 3074 fps | 99.7% |
| Somchem S361 | <<locked>> | 88% | 57,769 psi | 87% | 3002 fps | 98.6% |
| Somchem S365 | <<locked>> | 86% | 57,305 psi | 86% | 3028 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 58,552 psi | 88% | 3051 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 58,262 psi | 87% | 2949 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,870 psi | 87% | 3015 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 58,320 psi | 87% | 3028 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 57,116 psi | 86% | 3018 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,101 psi | 86% | 3048 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,101 psi | 86% | 3123 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 96% | 57,580 psi | 86% | 3104 fps | 98.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 58,856 psi | 88% | 3166 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,522 psi | 86% | 2963 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 59,741 psi | 90% | 3100 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 58,160 psi | 87% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 58,682 psi | 88% | 3048 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% | 38,159 psi | 57% | 2667 fps | 98.2% |
| Accurate 4350 | <<locked>> | 80% | 50,705 psi | 76% | 2930 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 45,295 psi | 68% | 2904 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 42,047 psi | 63% | 2799 fps | 96.9% |
| ADI AR 2213 | <<locked>> | 84% | 43,265 psi | 65% | 2854 fps | 96% |
| ADI AR 2217 | <<locked>> | 92% | 41,901 psi | 63% | 2812 fps | 96% |
| ADI AR 2225 | <<locked>> | 88% | 33,199 psi | 50% | 2644 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,540 psi | 64% | 2802 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,254 psi | 72% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,148 psi | 63% | 2792 fps | 96.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,043 psi | 57% | 2730 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,666 psi | 55% | 2690 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,749 psi | 48% | 2595 fps | 96.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,031 psi | 62% | 2844 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 51,358 psi | 77% | 2943 fps | 95.3% |
| Bofors RP15 | <<locked>> | 82% | 37,869 psi | 57% | 2723 fps | 95.4% |
| Bofors RP30 | <<locked>> | 88% | 38,638 psi | 58% | 2762 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 38,043 psi | 57% | 2730 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 52,388 psi | 79% | 2930 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 40,132 psi | 60% | 2776 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 52,069 psi | 78% | 2979 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 54,360 psi | 81% | 2995 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 82% | 42,960 psi | 64% | 2792 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 84% | 45,310 psi | 68% | 2841 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,542 psi | 68% | 2812 fps | 100% |
| Hodgdon Retumbo | 70.5 gr | 84% | 35,563 psi | 53% | 2746 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 52,431 psi | 79% | 3005 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,949 psi | 42% | 1762 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,790 psi | 72% | 2858 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,795 psi | 81% | 2956 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 47,848 psi | 72% | 2867 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,568 psi | 62% | 2733 fps | 95% |
| IMR 7828 SSC | <<locked>> | 84% | 41,684 psi | 62% | 2828 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 96% | 39,494 psi | 59% | 2799 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 51,314 psi | 77% | 2904 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,676 psi | 74% | 2890 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 32,721 psi | 49% | 2533 fps | 96.4% |
| Norma 204 | <<locked>> | 80% | 48,225 psi | 72% | 2900 fps | 98.2% |
| Norma 217 | <<locked>> | 92% | 34,519 psi | 52% | 2697 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 40,161 psi | 60% | 2802 fps | 97.7% |
| Norma URP | <<locked>> | 80% | 49,197 psi | 74% | 2910 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 41,568 psi | 62% | 2831 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 48,196 psi | 72% | 2907 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 34,635 psi | 52% | 2641 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,543 psi | 43% | 1801 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,850 psi | 76% | 2949 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,994 psi | 73% | 2969 fps | 100% |
| ReloadSwiss RS 76 | 75.4 gr | 84% | 34,824 psi | 52% | 2717 fps | 96.3% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 46,253 psi | 69% | 2949 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 43,178 psi | 65% | 2776 fps | 96.1% |
| Rottweil R 905 | <<locked>> | 80% | 41,582 psi | 62% | 2779 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 80% | 52,388 psi | 79% | 2930 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,314 psi | 77% | 2904 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,676 psi | 74% | 2890 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 56,492 psi | 85% | 2851 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,270 psi | 75% | 2848 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,249 psi | 62% | 2772 fps | 96.8% |
| Somchem S361 | <<locked>> | 80% | 44,121 psi | 66% | 2762 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 46,630 psi | 70% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,090 psi | 63% | 2759 fps | 97.8% |
| Vihtavuori N150 | <<locked>> | 80% | 54,505 psi | 82% | 2897 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,807 psi | 76% | 2907 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,608 psi | 55% | 2628 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 50,096 psi | 75% | 2907 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,075 psi | 62% | 2776 fps | 99.9% |
| Vihtavuori N560 | 71.4 gr | 82% | 43,004 psi | 64% | 2854 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 88% | 43,598 psi | 65% | 2848 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 94% | 47,326 psi | 71% | 2963 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,038 psi | 75% | 2858 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,286 psi | 78% | 2982 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,431 psi | 50% | 2717 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,609 psi | 58% | 2680 fps | 95.8% |
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 72 powders for 7 mm STW loaded with the .284 | 140gr | Speer TBBC. Hodgdon Retumbo delivers the highest muzzle velocity at 3,219 fps; across all powders the maximum-charge window runs from 1,965 fps to 3,219 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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. Hodgdon Retumbo, ReloadSwiss RS 76, Vihtavuori N560 rank at the top here: for 7 mm STW with the .284 | 140gr | Speer TBBC 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.