Load Specifications
Load data in caliber 7 mm STW with .284 | 142gr | Lehigh Defense Controlled Chaos bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Winchester StaBALL HD and ReloadSwiss RS 76.
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% | 59,582 psi | 89% | 3022 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,318 psi | 84% | 2999 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 58,494 psi | 88% | 3127 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 82% | 60,147 psi | 90% | 3012 fps | 100% |
| ADI AR 2209 | <<locked>> | 90% | 57,363 psi | 86% | 3061 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 59,277 psi | 89% | 3127 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,577 psi | 80% | 3022 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,124 psi | 72% | 2982 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,435 psi | 86% | 3061 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 58,668 psi | 88% | 3071 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,927 psi | 85% | 3048 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 59,422 psi | 89% | 3120 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,087 psi | 86% | 3035 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,724 psi | 85% | 3094 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 57,798 psi | 87% | 3120 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,753 psi | 85% | 3015 fps | 96.5% |
| Bofors RP15 | <<locked>> | 96% | 58,537 psi | 88% | 3104 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,420 psi | 85% | 3094 fps | 99.3% |
| Bofors RP5 | <<locked>> | 94% | 59,422 psi | 89% | 3120 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 58,204 psi | 87% | 3002 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 59,117 psi | 89% | 3114 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 57,972 psi | 87% | 3058 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,695 psi | 85% | 3012 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 58,958 psi | 88% | 3061 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,740 psi | 87% | 3041 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,740 psi | 87% | 2979 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 59,596 psi | 89% | 3232 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 59,016 psi | 88% | 3091 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,144 psi | 56% | 1939 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 60,205 psi | 90% | 3041 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 59,466 psi | 89% | 3022 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 56,724 psi | 85% | 2992 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 59,524 psi | 89% | 3041 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 94% | 57,130 psi | 86% | 3100 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,526 psi | 65% | 2877 fps | 96.6% |
| Lovex S065 | <<locked>> | 84% | 56,869 psi | 85% | 2969 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 58,711 psi | 88% | 3018 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,898 psi | 85% | 2986 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,696 psi | 86% | 3041 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 43,801 psi | 66% | 2904 fps | 98.7% |
| Norma MRP | <<locked>> | 92% | 59,611 psi | 89% | 3140 fps | 100% |
| Norma URP | <<locked>> | 86% | 58,392 psi | 88% | 3038 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 58,262 psi | 87% | 3123 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 57,363 psi | 86% | 3041 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 56,927 psi | 85% | 3051 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,130 psi | 57% | 1985 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,652 psi | 85% | 3022 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 59,205 psi | 89% | 3110 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,594 psi | 85% | 3163 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,130 psi | 84% | 3114 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 82% | 59,799 psi | 90% | 2999 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 58,392 psi | 88% | 3028 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 92% | 60,307 psi | 90% | 3094 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 58,204 psi | 87% | 3002 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,869 psi | 85% | 2969 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 58,711 psi | 88% | 3018 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,827 psi | 88% | 2861 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 59,741 psi | 90% | 2976 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 59,857 psi | 90% | 3091 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 59,205 psi | 89% | 2992 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 60,162 psi | 90% | 3015 fps | 98.8% |
| Somchem S365 | <<locked>> | 88% | 59,466 psi | 89% | 3041 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,058 psi | 86% | 3009 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 56,811 psi | 85% | 2910 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 60,307 psi | 90% | 3028 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,695 psi | 85% | 2986 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 59,495 psi | 89% | 3035 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 59,016 psi | 88% | 3058 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 59,190 psi | 89% | 3136 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 98% | 59,582 psi | 89% | 3120 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,695 psi | 85% | 3117 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 59,973 psi | 90% | 2976 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 58,218 psi | 87% | 3061 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 59,988 psi | 90% | 3169 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,043 psi | 86% | 3002 fps | 99.5% |
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% | 36,869 psi | 55% | 2621 fps | 97.8% |
| Accurate 4350 | <<locked>> | 80% | 49,124 psi | 74% | 2887 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 47,050 psi | 71% | 2923 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 56,463 psi | 85% | 2956 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 40,886 psi | 61% | 2756 fps | 96.5% |
| ADI AR 2213 | <<locked>> | 84% | 41,930 psi | 63% | 2805 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 92% | 40,698 psi | 61% | 2769 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 88% | 32,227 psi | 48% | 2602 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,876 psi | 70% | 2894 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,621 psi | 82% | 3012 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,886 psi | 61% | 2749 fps | 96.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,767 psi | 55% | 2684 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,418 psi | 53% | 2651 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,792 psi | 46% | 2556 fps | 96.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,508 psi | 59% | 2802 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 53,287 psi | 80% | 2959 fps | 95.7% |
| Bofors RP15 | <<locked>> | 84% | 39,204 psi | 59% | 2743 fps | 95.9% |
| Bofors RP30 | <<locked>> | 90% | 40,016 psi | 60% | 2782 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 36,767 psi | 55% | 2684 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 51,184 psi | 77% | 2887 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 38,870 psi | 58% | 2730 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 50,662 psi | 76% | 2936 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 52,968 psi | 79% | 2953 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 44,730 psi | 67% | 2812 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 43,961 psi | 66% | 2795 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,222 psi | 66% | 2769 fps | 100% |
| Hodgdon Retumbo | 69.6 gr | 86% | 36,753 psi | 55% | 2766 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 50,792 psi | 76% | 2963 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,862 psi | 42% | 1739 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,702 psi | 70% | 2818 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,649 psi | 79% | 2917 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 46,572 psi | 70% | 2828 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 43,294 psi | 65% | 2749 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 84% | 40,350 psi | 60% | 2782 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 98% | 40,611 psi | 61% | 2815 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 50,096 psi | 75% | 2861 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 48,501 psi | 73% | 2851 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 31,691 psi | 48% | 2493 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 46,920 psi | 70% | 2858 fps | 97.9% |
| Norma 217 | <<locked>> | 92% | 33,272 psi | 50% | 2654 fps | 95% |
| Norma MRP | <<locked>> | 80% | 38,696 psi | 58% | 2759 fps | 97.3% |
| Norma URP | <<locked>> | 80% | 47,921 psi | 72% | 2874 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 40,205 psi | 60% | 2789 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 46,847 psi | 70% | 2867 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 36,056 psi | 54% | 2661 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,471 psi | 43% | 1778 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,226 psi | 74% | 2907 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,427 psi | 71% | 2923 fps | 100% |
| ReloadSwiss RS 76 | 72.8 gr | 84% | 33,678 psi | 50% | 2671 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 44,222 psi | 66% | 2897 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 56,043 psi | 84% | 2946 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 42,090 psi | 63% | 2736 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 40,234 psi | 60% | 2736 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 80% | 51,184 psi | 77% | 2887 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,096 psi | 75% | 2861 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 48,501 psi | 73% | 2851 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,361 psi | 83% | 2815 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,226 psi | 74% | 2808 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,900 psi | 60% | 2730 fps | 96.3% |
| Somchem S355 | <<locked>> | 80% | 55,564 psi | 83% | 2943 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 42,946 psi | 64% | 2720 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 45,281 psi | 68% | 2828 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,843 psi | 61% | 2717 fps | 97.5% |
| Vihtavuori N150 | <<locked>> | 80% | 53,258 psi | 80% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,356 psi | 74% | 2864 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,433 psi | 53% | 2585 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 48,762 psi | 73% | 2867 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,827 psi | 60% | 2733 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 84% | 44,730 psi | 67% | 2877 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 88% | 42,192 psi | 63% | 2805 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 94% | 45,469 psi | 68% | 2913 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,704 psi | 73% | 2818 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,894 psi | 76% | 2943 fps | 99.6% |
| Winchester StaBALL HD | 66.5 gr | 80% | 31,894 psi | 48% | 2674 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,449 psi | 56% | 2638 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 80 powders for 7 mm STW loaded with the .284 | 142gr | Lehigh Defense Controlled Chaos. Hodgdon Retumbo delivers the highest muzzle velocity at 3,232 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,232 fps. ADI AR 2217 gives the best case fill at 100 %, and 80 of the 80 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 142.0 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 2218, ADI AR 2225 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, Winchester StaBALL HD, ReloadSwiss RS 76 rank at the top here: for 7 mm STW with the .284 | 142gr | Lehigh Defense Controlled Chaos they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-33, IMR 7977 Enduron 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.