Load Specifications
Load data in caliber 7 mm STW with .284 | 145gr | Hasler ARIETE bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Ramshot Grand and Accurate MAGPRO.
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% | 58,175 psi | 87% | 2982 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 59,030 psi | 88% | 3015 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 57,145 psi | 86% | 3081 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 82% | 59,321 psi | 89% | 2976 fps | 100% |
| ADI AR 2209 | <<locked>> | 90% | 56,391 psi | 85% | 3022 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 94% | 58,320 psi | 87% | 3087 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,417 psi | 79% | 2982 fps | 98.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,891 psi | 70% | 2936 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 88% | 60,336 psi | 90% | 3077 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,522 psi | 86% | 3028 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 59,741 psi | 90% | 3068 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 58,320 psi | 87% | 3077 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 59,640 psi | 89% | 3041 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 59,741 psi | 90% | 3110 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,550 psi | 85% | 3077 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 59,799 psi | 90% | 3045 fps | 97.3% |
| Bofors RP15 | <<locked>> | 96% | 57,464 psi | 86% | 3064 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,303 psi | 83% | 3051 fps | 99.2% |
| Bofors RP5 | <<locked>> | 94% | 58,320 psi | 87% | 3077 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 57,217 psi | 86% | 2966 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 58,189 psi | 87% | 3074 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 57,043 psi | 86% | 3018 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 59,596 psi | 89% | 3035 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 58,030 psi | 87% | 3025 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,782 psi | 85% | 3002 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,521 psi | 85% | 2940 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 58,392 psi | 88% | 3189 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 58,001 psi | 87% | 3054 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,159 psi | 56% | 1919 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 59,437 psi | 89% | 3005 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 58,697 psi | 88% | 2989 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 59,524 psi | 89% | 3005 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 58,595 psi | 88% | 3005 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 96% | 60,278 psi | 90% | 3123 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,337 psi | 63% | 2835 fps | 96.4% |
| Lovex S065 | <<locked>> | 86% | 59,582 psi | 89% | 2986 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,725 psi | 87% | 2982 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 59,437 psi | 89% | 2999 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,927 psi | 85% | 3009 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 42,583 psi | 64% | 2858 fps | 98.6% |
| Norma MRP | <<locked>> | 92% | 58,508 psi | 88% | 3100 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,421 psi | 86% | 2999 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,217 psi | 86% | 3084 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 88% | 60,321 psi | 90% | 3061 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 60,220 psi | 90% | 3077 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,942 psi | 57% | 1962 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 59,480 psi | 89% | 3038 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 58,146 psi | 87% | 3071 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 60,118 psi | 90% | 3192 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,781 psi | 82% | 3071 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 82% | 58,595 psi | 88% | 2959 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 57,392 psi | 86% | 2992 fps | 99% |
| Rottweil R 905 | <<locked>> | 92% | 59,408 psi | 89% | 3058 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 57,217 psi | 86% | 2966 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 59,582 psi | 89% | 2986 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,725 psi | 87% | 2982 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,160 psi | 87% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 58,827 psi | 88% | 2940 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 58,972 psi | 88% | 3054 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 58,131 psi | 87% | 2953 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 59,205 psi | 89% | 2982 fps | 98.8% |
| Somchem S365 | <<locked>> | 88% | 58,450 psi | 88% | 3002 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 59,683 psi | 89% | 3022 fps | 100% |
| Vihtavuori N150 | <<locked>> | 84% | 59,625 psi | 89% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 59,146 psi | 89% | 2989 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 59,524 psi | 89% | 3005 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 58,305 psi | 87% | 2992 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,899 psi | 87% | 3022 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 58,160 psi | 87% | 3097 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 98% | 58,160 psi | 87% | 3074 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,434 psi | 83% | 3074 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 59,263 psi | 89% | 2943 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,290 psi | 86% | 3022 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 58,769 psi | 88% | 3130 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 60,046 psi | 90% | 3022 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% | 35,708 psi | 54% | 2579 fps | 97.6% |
| Accurate 4350 | <<locked>> | 80% | 47,993 psi | 72% | 2844 fps | 100% |
| Accurate MAGPRO | 72.9 gr | 86% | 46,079 psi | 69% | 2884 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 55,796 psi | 84% | 2923 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 39,958 psi | 60% | 2717 fps | 96.3% |
| ADI AR 2213 | <<locked>> | 84% | 41,060 psi | 62% | 2766 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 92% | 39,653 psi | 59% | 2726 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 90% | 33,301 psi | 50% | 2615 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,064 psi | 69% | 2854 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,650 psi | 80% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,089 psi | 60% | 2713 fps | 96.4% |
| Alliant Reloder-22 | <<locked>> | 82% | 38,508 psi | 58% | 2710 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,461 psi | 52% | 2608 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,762 psi | 45% | 2507 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,145 psi | 57% | 2749 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 52,562 psi | 79% | 2923 fps | 95.7% |
| Bofors RP15 | <<locked>> | 84% | 38,174 psi | 57% | 2697 fps | 95.7% |
| Bofors RP30 | <<locked>> | 90% | 38,754 psi | 58% | 2733 fps | 95.2% |
| Bofors RP5 | <<locked>> | 82% | 38,508 psi | 58% | 2710 fps | 96% |
| Bofors RP7 | <<locked>> | 80% | 50,372 psi | 76% | 2854 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 37,811 psi | 57% | 2687 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 49,705 psi | 75% | 2897 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 52,301 psi | 78% | 2917 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 43,830 psi | 66% | 2776 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 43,076 psi | 65% | 2756 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,352 psi | 65% | 2733 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 35,752 psi | 54% | 2720 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 49,922 psi | 75% | 2927 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,746 psi | 42% | 1716 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,774 psi | 69% | 2782 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,808 psi | 78% | 2877 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 45,455 psi | 68% | 2789 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 42,453 psi | 64% | 2713 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 86% | 42,264 psi | 63% | 2805 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 39,407 psi | 59% | 2766 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 49,226 psi | 74% | 2825 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 47,601 psi | 71% | 2815 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 30,458 psi | 46% | 2444 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 46,035 psi | 69% | 2818 fps | 97.8% |
| Norma 217 | <<locked>> | 94% | 34,374 psi | 52% | 2664 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 37,594 psi | 56% | 2713 fps | 97.1% |
| Norma URP | <<locked>> | 80% | 47,050 psi | 71% | 2835 fps | 100% |
| Ramshot Grand | 69.3 gr | 84% | 39,262 psi | 59% | 2749 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 45,876 psi | 69% | 2825 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 35,012 psi | 52% | 2618 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,340 psi | 42% | 1759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,138 psi | 72% | 2867 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,470 psi | 70% | 2887 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 32,518 psi | 49% | 2621 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 43,076 psi | 65% | 2854 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 54,998 psi | 82% | 2910 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 41,336 psi | 62% | 2697 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 39,349 psi | 59% | 2694 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 80% | 50,372 psi | 76% | 2854 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,226 psi | 74% | 2825 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 47,601 psi | 71% | 2815 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,665 psi | 82% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,182 psi | 72% | 2772 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,015 psi | 58% | 2690 fps | 96.2% |
| Somchem S355 | <<locked>> | 80% | 54,665 psi | 82% | 2904 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 42,032 psi | 63% | 2680 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 44,077 psi | 66% | 2782 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,885 psi | 60% | 2677 fps | 97.4% |
| Vihtavuori N150 | <<locked>> | 80% | 52,417 psi | 79% | 2825 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,544 psi | 73% | 2831 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,534 psi | 52% | 2546 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 47,703 psi | 72% | 2828 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,508 psi | 58% | 2687 fps | 99.7% |
| Vihtavuori N560 | 69.9 gr | 84% | 43,772 psi | 66% | 2838 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 88% | 40,872 psi | 61% | 2759 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 96% | 47,848 psi | 72% | 2940 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,819 psi | 72% | 2782 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,893 psi | 75% | 2900 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,719 psi | 46% | 2618 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,434 psi | 55% | 2595 fps | 95.2% |
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 | 145gr | Hasler ARIETE. ReloadSwiss RS 76 delivers the highest muzzle velocity at 3,192 fps; across all powders the maximum-charge window runs from 1,919 fps to 3,192 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 145.0 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. Vihtavuori N560, Ramshot Grand, Accurate MAGPRO rank at the top here: for 7 mm STW with the .284 | 145gr | 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-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.