Load Specifications
Load data in caliber 7 mm STW with .284 | 128gr | IBEX TRD bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Ramshot Grand and Alliant Reloder-26.
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% | 59,770 psi | 90% | 3146 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,507 psi | 85% | 3127 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 57,957 psi | 87% | 3232 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 59,770 psi | 90% | 3133 fps | 100% |
| ADI AR 2209 | <<locked>> | 90% | 56,869 psi | 85% | 3173 fps | 99% |
| ADI AR 2213 | <<locked>> | 94% | 58,595 psi | 88% | 3235 fps | 98.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,026 psi | 79% | 3123 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,935 psi | 72% | 3084 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 57,145 psi | 86% | 3169 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 57,145 psi | 86% | 3169 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,666 psi | 85% | 3179 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 58,102 psi | 87% | 3192 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 60,118 psi | 90% | 3215 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 58,958 psi | 88% | 3232 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 60,365 psi | 90% | 3202 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 60,017 psi | 90% | 3264 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 57,566 psi | 86% | 3241 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 59,915 psi | 90% | 3179 fps | 96.3% |
| Bofors RP15 | <<locked>> | 96% | 58,117 psi | 87% | 3215 fps | 99.2% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,057 psi | 84% | 3202 fps | 98.6% |
| Bofors RP5 | <<locked>> | 94% | 58,958 psi | 88% | 3232 fps | 99.4% |
| Bofors RP7 | <<locked>> | 84% | 58,131 psi | 87% | 3120 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 58,421 psi | 88% | 3215 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 84% | 57,595 psi | 86% | 3173 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 59,959 psi | 90% | 3186 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 58,552 psi | 88% | 3169 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,363 psi | 86% | 3150 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,348 psi | 86% | 3100 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 58,842 psi | 88% | 3343 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 58,566 psi | 88% | 3209 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,275 psi | 56% | 2041 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 59,669 psi | 89% | 3153 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 59,190 psi | 89% | 3140 fps | 99.8% |
| IMR 4831 | <<locked>> | 86% | 56,623 psi | 85% | 3114 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 59,045 psi | 89% | 3146 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 94% | 56,550 psi | 85% | 3209 fps | 98.3% |
| Lovex S065 | <<locked>> | 86% | 60,278 psi | 90% | 3140 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 58,668 psi | 88% | 3140 fps | 99.9% |
| Lovex S071 | <<locked>> | 98% | 57,174 psi | 86% | 3107 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,334 psi | 86% | 3156 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 43,903 psi | 66% | 3012 fps | 98% |
| Norma MRP | <<locked>> | 92% | 59,074 psi | 89% | 3255 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 58,088 psi | 87% | 3159 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,609 psi | 86% | 3232 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 86% | 57,072 psi | 86% | 3159 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 56,304 psi | 84% | 3159 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,261 psi | 57% | 2090 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,347 psi | 84% | 3143 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 58,465 psi | 88% | 3228 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,086 psi | 84% | 3271 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,477 psi | 83% | 3219 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 82% | 59,828 psi | 90% | 3127 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 57,783 psi | 87% | 3136 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 92% | 60,002 psi | 90% | 3209 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 58,131 psi | 87% | 3120 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 60,278 psi | 90% | 3140 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 58,668 psi | 88% | 3140 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,711 psi | 88% | 2986 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 59,611 psi | 89% | 3091 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 59,553 psi | 89% | 3209 fps | 99.4% |
| Somchem S355 | <<locked>> | 82% | 59,146 psi | 89% | 3117 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 59,814 psi | 90% | 3127 fps | 98.1% |
| Somchem S365 | <<locked>> | 88% | 58,987 psi | 88% | 3159 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,898 psi | 85% | 3123 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 82% | 56,695 psi | 85% | 3031 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 59,886 psi | 90% | 3150 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 60,075 psi | 90% | 3153 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 59,176 psi | 89% | 3153 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 58,943 psi | 88% | 3182 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 58,624 psi | 88% | 3248 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 98% | 59,321 psi | 89% | 3228 fps | 98.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,173 psi | 84% | 3222 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 59,611 psi | 89% | 3094 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,769 psi | 87% | 3176 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 59,146 psi | 89% | 3291 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,724 psi | 85% | 3114 fps | 99% |
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% | 37,652 psi | 56% | 2740 fps | 97.2% |
| Accurate 4350 | <<locked>> | 80% | 49,487 psi | 74% | 3012 fps | 100% |
| Accurate MAGPRO | 77.2 gr | 88% | 50,473 psi | 76% | 3097 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 56,275 psi | 84% | 3081 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 40,930 psi | 61% | 2861 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 86% | 44,933 psi | 67% | 2976 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 94% | 43,468 psi | 65% | 2930 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 90% | 34,853 psi | 52% | 2766 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,307 psi | 62% | 2864 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,307 psi | 62% | 2864 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,659 psi | 70% | 3009 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,259 psi | 81% | 3136 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,944 psi | 61% | 2858 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 82% | 39,639 psi | 59% | 2858 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,810 psi | 54% | 2766 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,343 psi | 47% | 2664 fps | 95.3% |
| Alliant Reloder-26 | 71 gr | 80% | 39,639 psi | 59% | 2913 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,391 psi | 85% | 3117 fps | 95.5% |
| Bofors RP15 | <<locked>> | 86% | 42,061 psi | 63% | 2913 fps | 95.9% |
| Bofors RP30 | <<locked>> | 92% | 42,873 psi | 64% | 2953 fps | 95.5% |
| Bofors RP5 | <<locked>> | 82% | 39,639 psi | 59% | 2858 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 51,285 psi | 77% | 3005 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 90% | 41,698 psi | 63% | 2894 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 50,705 psi | 76% | 3054 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 52,663 psi | 79% | 3064 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 86% | 47,790 psi | 72% | 2979 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 47,021 psi | 70% | 2966 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,382 psi | 67% | 2887 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 39,479 psi | 59% | 2936 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 50,589 psi | 76% | 3074 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,920 psi | 42% | 1831 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,659 psi | 70% | 2930 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,257 psi | 78% | 3025 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 46,804 psi | 70% | 2946 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 46,166 psi | 69% | 2917 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 88% | 46,166 psi | 69% | 3012 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 50,328 psi | 75% | 2979 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 48,733 psi | 73% | 2969 fps | 99% |
| Lovex S071 | <<locked>> | 80% | 32,648 psi | 49% | 2615 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 46,920 psi | 70% | 2969 fps | 97.1% |
| Norma 217 | <<locked>> | 94% | 36,027 psi | 54% | 2822 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 38,914 psi | 58% | 2871 fps | 96.4% |
| Norma URP | <<locked>> | 80% | 47,993 psi | 72% | 2992 fps | 99.9% |
| Ramshot Grand | 73.5 gr | 86% | 43,323 psi | 65% | 2963 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 46,905 psi | 70% | 2982 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 39,044 psi | 59% | 2831 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,703 psi | 43% | 1877 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,313 psi | 74% | 3025 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,166 psi | 71% | 3038 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 36,651 psi | 55% | 2848 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 47,877 psi | 72% | 3074 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 56,217 psi | 84% | 3074 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 44,933 psi | 67% | 2900 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 40,451 psi | 61% | 2844 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 51,285 psi | 77% | 3005 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,328 psi | 75% | 2979 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 48,733 psi | 73% | 2969 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,187 psi | 83% | 2936 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,371 psi | 74% | 2923 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,103 psi | 60% | 2838 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 55,695 psi | 83% | 3068 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 46,108 psi | 69% | 2887 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 45,310 psi | 68% | 2946 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,220 psi | 62% | 2828 fps | 96.7% |
| Vihtavuori N150 | <<locked>> | 80% | 53,301 psi | 80% | 2982 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,298 psi | 74% | 2982 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 38,276 psi | 57% | 2753 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 48,994 psi | 73% | 2986 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 40,176 psi | 60% | 2851 fps | 99.4% |
| Vihtavuori N560 | <<locked>> | 86% | 47,863 psi | 72% | 3051 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 90% | 45,426 psi | 68% | 2976 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 96% | 48,675 psi | 73% | 3084 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,646 psi | 73% | 2933 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,705 psi | 76% | 3054 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,271 psi | 48% | 2789 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 40,335 psi | 60% | 2805 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 76 powders for 7 mm STW loaded with the .284 | 128gr | IBEX TRD. Hodgdon Retumbo delivers the highest muzzle velocity at 3,343 fps; across all powders the maximum-charge window runs from 2,041 fps to 3,343 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 128.0 gr projectile in 0.284" calls for a 1:11.0 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. Accurate MAGPRO, Ramshot Grand, Alliant Reloder-26 rank at the top here: for 7 mm STW with the .284 | 128gr | IBEX TRD 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.