Load Specifications
Load data in caliber 7 mm STW with .284 | 120gr | Osprey Virtus bullet and 82 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and ADI AR 2213.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 60,031 psi | 90% | 3202 fps | 99.5% |
| Accurate 3100 | <<locked>> | 96% | 57,217 psi | 86% | 3192 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 59,437 psi | 89% | 3173 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 58,247 psi | 87% | 3248 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 56,275 psi | 84% | 3287 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 84% | 59,205 psi | 89% | 3219 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 59,727 psi | 90% | 3304 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 57,624 psi | 86% | 3301 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,757 psi | 64% | 3045 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,855 psi | 85% | 3186 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 59,292 psi | 89% | 3310 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,797 psi | 85% | 3268 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 58,987 psi | 88% | 3287 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,421 psi | 86% | 3291 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 58,436 psi | 88% | 3268 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,201 psi | 81% | 3264 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 59,654 psi | 89% | 3360 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 60,147 psi | 90% | 3333 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 57,841 psi | 87% | 3199 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,966 psi | 75% | 3176 fps | 96.9% |
| Bofors RP5 | <<locked>> | 96% | 57,421 psi | 86% | 3291 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 56,971 psi | 85% | 3192 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,301 psi | 80% | 3209 fps | 98% |
| Hodgdon H380 | <<locked>> | 82% | 58,146 psi | 87% | 3222 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 60,321 psi | 90% | 3304 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 59,103 psi | 89% | 3261 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 57,406 psi | 86% | 3235 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 56,246 psi | 84% | 3215 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 59,495 psi | 89% | 3222 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,026 psi | 79% | 3323 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 86% | 57,566 psi | 86% | 3281 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 55% | 2100 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 58,537 psi | 88% | 3199 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 58,958 psi | 88% | 3232 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 58,682 psi | 88% | 3222 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 58,711 psi | 88% | 3235 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 58,305 psi | 87% | 3219 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 98% | 59,176 psi | 89% | 3337 fps | 98.3% |
| Lovex S062 | <<locked>> | 82% | 58,726 psi | 88% | 3186 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 59,059 psi | 89% | 3215 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 57,203 psi | 86% | 3205 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,375 psi | 82% | 3150 fps | 99.7% |
| Norma 203B | <<locked>> | 82% | 59,944 psi | 90% | 3251 fps | 100% |
| Norma 204 | <<locked>> | 88% | 56,347 psi | 84% | 3225 fps | 98.5% |
| Norma MRP | <<locked>> | 94% | 57,232 psi | 86% | 3314 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 56,666 psi | 85% | 3228 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 56,028 psi | 84% | 3287 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 59,654 psi | 89% | 3287 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 59,205 psi | 89% | 3287 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,362 psi | 56% | 2146 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,754 psi | 87% | 3202 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,115 psi | 84% | 3255 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 58,624 psi | 88% | 3268 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 57,217 psi | 86% | 3297 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,259 psi | 81% | 3320 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 84% | 58,146 psi | 87% | 3199 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,971 psi | 85% | 3209 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 58,378 psi | 88% | 3274 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 56,971 psi | 85% | 3192 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 59,059 psi | 89% | 3215 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 58,726 psi | 88% | 3186 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 57,203 psi | 86% | 3205 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 60,321 psi | 90% | 3264 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,957 psi | 87% | 3071 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 58,711 psi | 88% | 3166 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,928 psi | 87% | 3268 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 57,682 psi | 86% | 3192 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 59,059 psi | 89% | 3192 fps | 97.6% |
| Somchem S365 | <<locked>> | 90% | 57,203 psi | 86% | 3232 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 59,045 psi | 89% | 3241 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 59,466 psi | 89% | 3166 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 58,624 psi | 88% | 3222 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 58,842 psi | 88% | 3219 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 82% | 59,872 psi | 90% | 3159 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 57,827 psi | 87% | 3225 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,637 psi | 85% | 3241 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 57,072 psi | 86% | 3304 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 57,000 psi | 85% | 3274 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 58,827 psi | 88% | 3173 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,594 psi | 85% | 3245 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,420 psi | 85% | 3346 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 59,451 psi | 89% | 3238 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 2700 | <<locked>> | 80% | 55,941 psi | 84% | 3140 fps | 99% |
| Accurate 3100 | <<locked>> | 82% | 34,693 psi | 52% | 2749 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 55,767 psi | 84% | 3123 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 43,700 psi | 66% | 2989 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 92% | 52,185 psi | 78% | 3212 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 52,199 psi | 78% | 3107 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 42,192 psi | 63% | 2972 fps | 95.2% |
| ADI AR 2213 | 76.1 gr | 90% | 46,470 psi | 70% | 3087 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 96% | 37,188 psi | 56% | 2904 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,142 psi | 80% | 3130 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,134 psi | 63% | 3005 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,023 psi | 73% | 3140 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 42,177 psi | 63% | 2963 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 88% | 43,250 psi | 65% | 3022 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,111 psi | 47% | 2720 fps | 97.6% |
| Alliant Reloder-25 | <<locked>> | 86% | 33,243 psi | 50% | 2795 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,084 psi | 51% | 2851 fps | 96.6% |
| Bofors RP15 | <<locked>> | 90% | 42,801 psi | 64% | 3009 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 53,969 psi | 81% | 3140 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 46,659 psi | 70% | 3107 fps | 96% |
| Bofors RP5 | <<locked>> | 88% | 43,250 psi | 65% | 3022 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 46,862 psi | 70% | 3009 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 94% | 42,859 psi | 64% | 2995 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 54,302 psi | 81% | 3163 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,818 psi | 69% | 3045 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 80% | 48,298 psi | 72% | 3068 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 90% | 49,835 psi | 75% | 3097 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 48,805 psi | 73% | 3077 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,479 psi | 59% | 2877 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 92% | 40,089 psi | 60% | 3025 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 45,585 psi | 68% | 3061 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,296 psi | 41% | 1883 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 54,926 psi | 82% | 3146 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,482 psi | 64% | 2927 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,312 psi | 72% | 3038 fps | 98.3% |
| IMR 4831 | <<locked>> | 80% | 41,771 psi | 63% | 2933 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 88% | 47,892 psi | 72% | 3031 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 92% | 47,848 psi | 72% | 3127 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 55,129 psi | 83% | 3133 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 45,759 psi | 69% | 2982 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 44,019 psi | 66% | 2963 fps | 97.6% |
| Lovex S071 | <<locked>> | 86% | 33,794 psi | 51% | 2723 fps | 95% |
| Norma 203B | <<locked>> | 80% | 56,057 psi | 84% | 3192 fps | 100% |
| Norma 204 | <<locked>> | 80% | 42,424 psi | 64% | 2953 fps | 95.1% |
| Norma MRP | 73.3 gr | 84% | 39,450 psi | 59% | 2959 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 43,178 psi | 65% | 2982 fps | 99.1% |
| Ramshot Grand | <<locked>> | 90% | 44,512 psi | 67% | 3064 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 42,148 psi | 63% | 2966 fps | 97.7% |
| Ramshot Magnum | <<locked>> | 90% | 39,871 psi | 60% | 2927 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,920 psi | 42% | 1929 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 54,041 psi | 81% | 3143 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,127 psi | 78% | 3196 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,918 psi | 66% | 3009 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,438 psi | 64% | 3022 fps | 98.9% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 36,941 psi | 55% | 2927 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 50,821 psi | 76% | 3084 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 46,557 psi | 70% | 3015 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 84% | 41,220 psi | 62% | 2943 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 46,862 psi | 70% | 3009 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,759 psi | 69% | 2982 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 55,129 psi | 83% | 3133 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 44,019 psi | 66% | 2963 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,518 psi | 79% | 3143 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,155 psi | 77% | 2972 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,860 psi | 67% | 2920 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 43,932 psi | 66% | 3005 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 50,807 psi | 76% | 3081 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 51,358 psi | 77% | 3064 fps | 95.9% |
| Somchem S365 | <<locked>> | 80% | 40,059 psi | 60% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 38,986 psi | 58% | 2861 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 48,646 psi | 73% | 2999 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,570 psi | 67% | 2979 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 41,597 psi | 62% | 2907 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 56,072 psi | 84% | 3107 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 44,106 psi | 66% | 2979 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 34,780 psi | 52% | 2805 fps | 97.7% |
| Vihtavuori N560 | 78.6 gr | 90% | 49,545 psi | 74% | 3166 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 96% | 49,458 psi | 74% | 3136 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,034 psi | 66% | 2940 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,818 psi | 69% | 3045 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,543 psi | 41% | 2694 fps | 97% |
| Winchester Supreme 780 | <<locked>> | 86% | 41,452 psi | 62% | 2910 fps | 95.1% |
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 82 powders for 7 mm STW loaded with the .284 | 120gr | Osprey Virtus. Alliant Reloder-26 delivers the highest muzzle velocity at 3,360 fps; across all powders the maximum-charge window runs from 2,100 fps to 3,360 fps. ADI AR 2225 gives the best case fill at 100 %, and 82 of the 82 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 120.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP15 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. Norma MRP, Vihtavuori N560, ADI AR 2213 rank at the top here: for 7 mm STW with the .284 | 120gr | Osprey Virtus 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.