Load Specifications
Load data in caliber 7 mm STW with .284 | 100gr | Sierra VarmintKing bullet and 82 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester 760 and Alliant Reloder-16.
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>> | 86% | 59,321 psi | 89% | 3376 fps | 98.6% |
| Accurate 3100 | <<locked>> | 98% | 58,334 psi | 87% | 3415 fps | 99.5% |
| Accurate 4064 | <<locked>> | 82% | 57,130 psi | 86% | 3373 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 59,350 psi | 89% | 3481 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 60,278 psi | 90% | 3458 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,608 psi | 85% | 3458 fps | 97.4% |
| ADI AR 2213 | <<locked>> | 98% | 58,624 psi | 88% | 3517 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,928 psi | 87% | 3428 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,841 psi | 87% | 3451 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 59,944 psi | 90% | 3550 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,638 psi | 86% | 3504 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 60,017 psi | 90% | 3510 fps | 98.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 58,305 psi | 87% | 3510 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 59,074 psi | 89% | 3494 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,126 psi | 77% | 3406 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,927 psi | 84% | 3517 fps | 99.9% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,898 psi | 85% | 3484 fps | 97.6% |
| Bofors RP3 | <<locked>> | 84% | 59,277 psi | 89% | 3445 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 58,305 psi | 87% | 3510 fps | 98% |
| Bofors RP7 | <<locked>> | 88% | 58,305 psi | 87% | 3425 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 84% | 59,466 psi | 89% | 3465 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 57,435 psi | 86% | 3471 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 88% | 60,176 psi | 90% | 3491 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 96% | 58,421 psi | 88% | 3448 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,594 psi | 85% | 3399 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,111 psi | 75% | 3448 fps | 97% |
| Hodgdon Superformance | <<locked>> | 88% | 58,784 psi | 88% | 3504 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,390 psi | 55% | 2283 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 59,567 psi | 89% | 3445 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 58,595 psi | 88% | 3422 fps | 98.9% |
| IMR 4350 | <<locked>> | 92% | 60,104 psi | 90% | 3458 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 59,872 psi | 90% | 3455 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 59,770 psi | 90% | 3468 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 59,379 psi | 89% | 3484 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 59,350 psi | 89% | 3438 fps | 96.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 60,205 psi | 90% | 3556 fps | 97.2% |
| Lovex S062 | <<locked>> | 84% | 60,046 psi | 90% | 3435 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 60,263 psi | 90% | 3448 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 58,421 psi | 88% | 3435 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,677 psi | 77% | 3304 fps | 98.7% |
| Norma 203B | <<locked>> | 82% | 57,145 psi | 86% | 3432 fps | 100% |
| Norma 204 | <<locked>> | 90% | 57,493 psi | 86% | 3451 fps | 97.5% |
| Norma MRP | <<locked>> | 96% | 58,117 psi | 87% | 3533 fps | 99% |
| Norma URP | <<locked>> | 90% | 57,667 psi | 86% | 3465 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 58,668 psi | 88% | 3455 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,884 psi | 85% | 3497 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 90% | 56,753 psi | 85% | 3451 fps | 99.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,535 psi | 83% | 3425 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,144 psi | 56% | 2336 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 59,117 psi | 89% | 3435 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,942 psi | 85% | 3501 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 59,785 psi | 90% | 3501 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 58,262 psi | 87% | 3530 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,126 psi | 77% | 3445 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 58,204 psi | 87% | 3396 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 59,350 psi | 89% | 3438 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,972 psi | 87% | 3425 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 96% | 59,263 psi | 89% | 3494 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 88% | 58,305 psi | 87% | 3425 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 60,263 psi | 90% | 3448 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 60,046 psi | 90% | 3435 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 58,421 psi | 88% | 3435 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,363 psi | 86% | 3442 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 59,422 psi | 89% | 3314 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 60,176 psi | 90% | 3396 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 58,784 psi | 88% | 3488 fps | 98% |
| Somchem S355 | <<locked>> | 86% | 58,958 psi | 88% | 3435 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 58,001 psi | 87% | 3465 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 60,104 psi | 90% | 3461 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 82% | 58,740 psi | 88% | 3353 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 59,059 psi | 89% | 3363 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 56,768 psi | 85% | 3346 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 59,596 psi | 89% | 3455 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 59,799 psi | 90% | 3432 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 57,421 psi | 86% | 3350 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 58,943 psi | 88% | 3455 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 96% | 57,246 psi | 86% | 3465 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 57,972 psi | 87% | 3520 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 60,046 psi | 90% | 3406 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,653 psi | 86% | 3474 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,608 psi | 85% | 3570 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,507 psi | 85% | 3389 fps | 97.5% |
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 2700 | <<locked>> | 80% | 48,341 psi | 72% | 3182 fps | 96.4% |
| Accurate 3100 | <<locked>> | 86% | 38,101 psi | 57% | 3012 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 53,505 psi | 80% | 3314 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,568 psi | 62% | 3143 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 80% | 49,951 psi | 75% | 3281 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 49,269 psi | 74% | 3317 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 96% | 54,563 psi | 82% | 3442 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,894 psi | 76% | 3307 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 54,244 psi | 81% | 3389 fps | 99.9% |
| Alliant Reloder-16 | 68.1 gr | 80% | 39,900 psi | 60% | 3150 fps | 97.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,108 psi | 69% | 3301 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 48,965 psi | 73% | 3304 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 47,166 psi | 71% | 3294 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 82% | 31,633 psi | 47% | 2910 fps | 96.1% |
| Alliant Reloder-25 | <<locked>> | 92% | 38,943 psi | 58% | 3127 fps | 96.2% |
| Alliant Reloder-26 | 78.9 gr | 84% | 37,652 psi | 56% | 3127 fps | 96.3% |
| Bofors RP15 | <<locked>> | 96% | 49,777 psi | 75% | 3346 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 51,779 psi | 78% | 3323 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 47,166 psi | 71% | 3294 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 44,860 psi | 67% | 3163 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 51,837 psi | 78% | 3330 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 43,439 psi | 65% | 3189 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 80% | 46,151 psi | 69% | 3222 fps | 95.1% |
| Hodgdon H4831 | <<locked>> | 94% | 54,592 psi | 82% | 3383 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,434 psi | 56% | 3025 fps | 98.3% |
| Hodgdon Retumbo | <<locked>> | 98% | 46,659 psi | 70% | 3366 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 43,018 psi | 64% | 3199 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,282 psi | 41% | 2060 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,547 psi | 79% | 3323 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,824 psi | 82% | 3353 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 43,323 psi | 65% | 3133 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,340 psi | 69% | 3199 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 39,639 psi | 59% | 3077 fps | 97.3% |
| IMR 4895 | <<locked>> | 80% | 55,666 psi | 83% | 3422 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,709 psi | 84% | 3373 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 96% | 52,011 psi | 78% | 3402 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 52,852 psi | 79% | 3320 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,845 psi | 66% | 3140 fps | 97.2% |
| Lovex S070 | <<locked>> | 80% | 42,047 psi | 63% | 3107 fps | 95.5% |
| Lovex S071 | <<locked>> | 92% | 39,508 psi | 59% | 3045 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 53,592 psi | 80% | 3376 fps | 100% |
| Norma 204 | <<locked>> | 86% | 49,922 psi | 75% | 3304 fps | 95.7% |
| Norma MRP | <<locked>> | 88% | 43,163 psi | 65% | 3235 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 40,915 psi | 61% | 3130 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 80% | 54,839 psi | 82% | 3396 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 52,707 psi | 79% | 3422 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 40,059 psi | 60% | 3107 fps | 95.5% |
| Ramshot Magnum | <<locked>> | 94% | 43,932 psi | 66% | 3192 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,702 psi | 42% | 2103 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,706 psi | 78% | 3304 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,965 psi | 73% | 3369 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,568 psi | 62% | 3150 fps | 97.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,219 psi | 60% | 3159 fps | 96.8% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 44,005 psi | 66% | 3278 fps | 96.3% |
| Rottweil R 902 | <<locked>> | 80% | 54,578 psi | 82% | 3340 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,472 psi | 73% | 3255 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 54,317 psi | 81% | 3363 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 90% | 48,153 psi | 72% | 3287 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 44,860 psi | 67% | 3163 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,845 psi | 66% | 3140 fps | 97.2% |
| Shooters World Precision | <<locked>> | 80% | 52,852 psi | 79% | 3320 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,047 psi | 63% | 3107 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,024 psi | 75% | 3314 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,008 psi | 73% | 3156 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,062 psi | 65% | 3074 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 47,732 psi | 72% | 3278 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 48,588 psi | 73% | 3258 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 37,608 psi | 56% | 3077 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 45,745 psi | 69% | 3196 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 54,998 psi | 82% | 3301 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 55,201 psi | 83% | 3304 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 46,412 psi | 70% | 3169 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,409 psi | 64% | 3133 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 92% | 45,411 psi | 68% | 3169 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 53,708 psi | 81% | 3291 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,003 psi | 63% | 3130 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 32,909 psi | 49% | 2933 fps | 95.1% |
| Vihtavuori N560 | <<locked>> | 94% | 53,940 psi | 81% | 3445 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,829 psi | 63% | 3091 fps | 99.5% |
| Winchester 760 | 71.8 gr | 80% | 43,569 psi | 65% | 3196 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 84% | 30,298 psi | 45% | 2949 fps | 96.5% |
| Winchester Supreme 780 | <<locked>> | 92% | 48,863 psi | 73% | 3248 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 92 powders for 7 mm STW loaded with the .284 | 100gr | Sierra VarmintKing. Winchester StaBALL HD delivers the highest muzzle velocity at 3,570 fps; across all powders the maximum-charge window runs from 2,283 fps to 3,570 fps. ADI AR 2217 gives the best case fill at 100 %, and 92 of the 92 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 100.0 gr projectile in 0.284" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 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. Alliant Reloder-26, Winchester 760, Alliant Reloder-16 rank at the top here: for 7 mm STW with the .284 | 100gr | Sierra VarmintKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2217, Baschieri & Pellagri 109 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.