Load Specifications
Load data in caliber 7 mm STW with .284 | 152gr | Hasler ARIETE bullet and 76 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 IMR 7828 SSC.
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.
A valid access license is required to use the Personalized Load Calculator.
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 3100 | <<locked>> | 94% | 59,727 psi | 90% | 2943 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,579 psi | 85% | 2920 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 58,856 psi | 88% | 3051 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 90% | 58,015 psi | 87% | 2989 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 94% | 59,930 psi | 90% | 3051 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,998 psi | 81% | 2956 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,443 psi | 73% | 2913 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,914 psi | 87% | 2979 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 59,190 psi | 89% | 2989 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,479 psi | 86% | 2976 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 59,959 psi | 90% | 3045 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,508 psi | 86% | 2953 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,479 psi | 86% | 3018 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 58,436 psi | 88% | 3045 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,290 psi | 86% | 2953 fps | 97.3% |
| Bofors RP15 | <<locked>> | 96% | 59,030 psi | 88% | 3028 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,130 psi | 86% | 3025 fps | 99.6% |
| Bofors RP5 | <<locked>> | 94% | 59,959 psi | 90% | 3045 fps | 99.9% |
| Bofors RP7 | <<locked>> | 84% | 58,508 psi | 88% | 2923 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 60,002 psi | 90% | 3048 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 84% | 58,566 psi | 88% | 2982 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,188 psi | 86% | 2936 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 59,466 psi | 89% | 2989 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 58,450 psi | 88% | 2972 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 58,044 psi | 87% | 2897 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,202 psi | 84% | 3097 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 59,785 psi | 90% | 3022 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,101 psi | 56% | 1870 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,840 psi | 85% | 2910 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 59,973 psi | 90% | 2946 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,188 psi | 86% | 2913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 60,089 psi | 90% | 2969 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 94% | 58,059 psi | 87% | 3031 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,874 psi | 66% | 2812 fps | 97.3% |
| Lovex S065 | <<locked>> | 84% | 57,145 psi | 86% | 2890 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 59,103 psi | 89% | 2943 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,174 psi | 86% | 2910 fps | 100% |
| Norma 204 | <<locked>> | 86% | 58,204 psi | 87% | 2969 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 44,251 psi | 66% | 2838 fps | 99.2% |
| Norma MRP | <<locked>> | 92% | 60,234 psi | 90% | 3068 fps | 100% |
| Norma URP | <<locked>> | 86% | 58,929 psi | 88% | 2959 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 59,117 psi | 89% | 3054 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 86% | 57,827 psi | 87% | 2966 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,479 psi | 86% | 2982 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,087 psi | 57% | 1919 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,014 psi | 85% | 2943 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 59,756 psi | 90% | 3031 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,421 psi | 86% | 3094 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,666 psi | 85% | 3048 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 82% | 60,002 psi | 90% | 2913 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 58,871 psi | 88% | 2956 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 90% | 56,869 psi | 85% | 2963 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 58,508 psi | 88% | 2923 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,145 psi | 86% | 2890 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 59,103 psi | 89% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 59,263 psi | 89% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 60,205 psi | 90% | 2900 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,449 psi | 85% | 2959 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 59,422 psi | 89% | 2907 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 56,579 psi | 85% | 2887 fps | 98.8% |
| Somchem S365 | <<locked>> | 88% | 59,915 psi | 90% | 2959 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,450 psi | 86% | 2936 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,087 psi | 86% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,753 psi | 85% | 2897 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,087 psi | 86% | 2913 fps | 99.9% |
| Vihtavuori N170ᴾ | <<locked>> | 100% | 60,118 psi | 90% | 2979 fps | 96% |
| Vihtavuori N550 | <<locked>> | 86% | 59,857 psi | 90% | 2953 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 59,437 psi | 89% | 2979 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 59,799 psi | 90% | 3068 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 98% | 59,988 psi | 90% | 3045 fps | 99.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,392 psi | 86% | 3051 fps | 98.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 54,056 psi | 81% | 3035 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,565 psi | 85% | 2851 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 58,566 psi | 88% | 2982 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,623 psi | 85% | 3038 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,450 psi | 86% | 2930 fps | 99.8% |
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% | 36,796 psi | 55% | 2552 fps | 98.3% |
| Accurate 4350 | <<locked>> | 80% | 49,327 psi | 74% | 2812 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 44,034 psi | 66% | 2792 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 41,060 psi | 62% | 2687 fps | 97.2% |
| ADI AR 2213 | <<locked>> | 82% | 39,392 psi | 59% | 2677 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 90% | 38,145 psi | 57% | 2644 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 88% | 32,140 psi | 48% | 2536 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,340 psi | 71% | 2818 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 55,216 psi | 83% | 2936 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,176 psi | 62% | 2684 fps | 97.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,999 psi | 55% | 2621 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,607 psi | 53% | 2582 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,676 psi | 46% | 2487 fps | 97% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,639 psi | 59% | 2726 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 50,328 psi | 75% | 2831 fps | 95.6% |
| Bofors RP15 | <<locked>> | 82% | 36,695 psi | 55% | 2612 fps | 95.7% |
| Bofors RP30 | <<locked>> | 88% | 37,420 psi | 56% | 2654 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 36,999 psi | 55% | 2621 fps | 96% |
| Bofors RP7 | <<locked>> | 80% | 51,459 psi | 77% | 2815 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 86% | 36,347 psi | 54% | 2605 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 51,024 psi | 76% | 2864 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 53,548 psi | 80% | 2881 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 82% | 42,061 psi | 63% | 2684 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 82% | 41,336 psi | 62% | 2671 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,498 psi | 67% | 2697 fps | 100% |
| Hodgdon Retumbo | 66.8 gr | 84% | 34,461 psi | 52% | 2638 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 51,227 psi | 77% | 2890 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,789 psi | 42% | 1677 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,876 psi | 70% | 2746 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,910 psi | 79% | 2841 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 46,833 psi | 70% | 2756 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,683 psi | 61% | 2625 fps | 95.3% |
| IMR 7828 SSC | 66.7 gr | 84% | 40,596 psi | 61% | 2717 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 96% | 38,130 psi | 57% | 2687 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 50,343 psi | 75% | 2785 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,733 psi | 73% | 2779 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 31,401 psi | 47% | 2425 fps | 96.5% |
| Norma 204 | <<locked>> | 80% | 47,239 psi | 71% | 2789 fps | 98.5% |
| Norma 217 | <<locked>> | 92% | 33,257 psi | 50% | 2589 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 38,885 psi | 58% | 2690 fps | 98% |
| Norma URP | <<locked>> | 80% | 48,269 psi | 72% | 2795 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 37,536 psi | 56% | 2657 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 47,152 psi | 71% | 2795 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 33,388 psi | 50% | 2530 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,398 psi | 43% | 1716 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,516 psi | 74% | 2831 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,964 psi | 72% | 2854 fps | 100% |
| ReloadSwiss RS 76 | 69.8 gr | 82% | 31,270 psi | 47% | 2539 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 41,176 psi | 62% | 2762 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 56,333 psi | 84% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 42,351 psi | 63% | 2671 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 80% | 40,466 psi | 61% | 2667 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 80% | 51,459 psi | 77% | 2815 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,343 psi | 75% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,733 psi | 73% | 2779 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,695 psi | 83% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,255 psi | 74% | 2736 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,132 psi | 60% | 2664 fps | 97.1% |
| Somchem S355 | <<locked>> | 80% | 55,869 psi | 84% | 2861 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 43,120 psi | 65% | 2654 fps | 95.9% |
| Somchem S365 | <<locked>> | 80% | 45,440 psi | 68% | 2749 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,002 psi | 61% | 2651 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 80% | 53,592 psi | 80% | 2782 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,777 psi | 75% | 2792 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,563 psi | 53% | 2523 fps | 96.1% |
| Vihtavuori N170 | <<locked>> | 98% | 56,130 psi | 84% | 2920 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 48,936 psi | 73% | 2792 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,711 psi | 60% | 2657 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 41,945 psi | 63% | 2746 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 86% | 39,436 psi | 59% | 2674 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 94% | 45,890 psi | 69% | 2851 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 98% | 50,256 psi | 75% | 2969 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,124 psi | 74% | 2746 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,213 psi | 77% | 2867 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,169 psi | 48% | 2605 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,507 psi | 56% | 2572 fps | 96.1% |
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 80 powders for 7 mm STW loaded with the .284 | 152gr | Hasler ARIETE. Hodgdon Retumbo delivers the highest muzzle velocity at 3,097 fps; across all powders the maximum-charge window runs from 1,870 fps to 3,097 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 152.0 gr projectile in 0.284" calls for a 1:9.0 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, ReloadSwiss RS 76, IMR 7828 SSC rank at the top here: for 7 mm STW with the .284 | 152gr | Hasler ARIETE they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-50, 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.