Load Specifications
Load data in caliber 7 mm STW with .283 | 140gr | Rhino Penetrator bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Winchester StaBALL HD and ReloadSwiss RS 76.
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% | 60,133 psi | 90% | 3048 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,855 psi | 85% | 3025 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 58,972 psi | 88% | 3150 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 90% | 57,754 psi | 87% | 3084 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 59,814 psi | 90% | 3150 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,983 psi | 81% | 3045 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,443 psi | 73% | 3002 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,754 psi | 87% | 3084 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 58,958 psi | 88% | 3091 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,276 psi | 86% | 3071 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 59,915 psi | 90% | 3143 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,450 psi | 86% | 3054 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,203 psi | 86% | 3117 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 58,378 psi | 88% | 3143 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,058 psi | 86% | 3041 fps | 96.6% |
| Bofors RP15 | <<locked>> | 96% | 58,784 psi | 88% | 3127 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,087 psi | 86% | 3117 fps | 99.3% |
| Bofors RP5 | <<locked>> | 94% | 59,915 psi | 90% | 3143 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 58,465 psi | 88% | 3025 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 59,727 psi | 90% | 3140 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 84% | 58,407 psi | 88% | 3081 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,942 psi | 85% | 3035 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 59,234 psi | 89% | 3081 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 58,044 psi | 87% | 3064 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,972 psi | 87% | 2999 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 60,075 psi | 90% | 3255 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 59,364 psi | 89% | 3114 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,144 psi | 56% | 1955 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,753 psi | 85% | 3009 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 59,944 psi | 90% | 3048 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,188 psi | 86% | 3015 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 59,828 psi | 90% | 3061 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 94% | 57,667 psi | 86% | 3127 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,932 psi | 66% | 2900 fps | 96.7% |
| Lovex S065 | <<locked>> | 84% | 57,145 psi | 86% | 2992 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 58,914 psi | 88% | 3041 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,450 psi | 86% | 3012 fps | 100% |
| Norma 204 | <<locked>> | 86% | 58,102 psi | 87% | 3068 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 44,237 psi | 66% | 2927 fps | 98.8% |
| Norma MRP | <<locked>> | 92% | 60,162 psi | 90% | 3166 fps | 100% |
| Norma URP | <<locked>> | 86% | 58,624 psi | 88% | 3058 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 58,798 psi | 88% | 3150 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 57,754 psi | 87% | 3064 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,319 psi | 86% | 3074 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,101 psi | 57% | 2001 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,058 psi | 86% | 3048 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 59,611 psi | 89% | 3133 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,188 psi | 86% | 3186 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,623 psi | 85% | 3136 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 82% | 60,133 psi | 90% | 3022 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 58,523 psi | 88% | 3048 fps | 99% |
| Rottweil R 905 | <<locked>> | 90% | 56,782 psi | 85% | 3058 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 58,465 psi | 88% | 3025 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,145 psi | 86% | 2992 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 58,914 psi | 88% | 3041 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 59,190 psi | 89% | 2884 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 60,147 psi | 90% | 2999 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 60,191 psi | 90% | 3114 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 59,553 psi | 89% | 3015 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 56,550 psi | 85% | 2982 fps | 98.3% |
| Somchem S365 | <<locked>> | 88% | 59,930 psi | 90% | 3061 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,392 psi | 86% | 3031 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 57,116 psi | 86% | 2933 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,782 psi | 85% | 2999 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,217 psi | 86% | 3012 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 59,669 psi | 89% | 3054 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 59,422 psi | 89% | 3081 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 59,669 psi | 89% | 3163 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 98% | 60,017 psi | 90% | 3140 fps | 99.1% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,290 psi | 86% | 3140 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,405 psi | 85% | 2949 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 58,407 psi | 88% | 3081 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,405 psi | 85% | 3140 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,319 psi | 86% | 3025 fps | 99.5% |
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 3100 | <<locked>> | 80% | 37,159 psi | 56% | 2644 fps | 97.8% |
| Accurate 4350 | <<locked>> | 80% | 49,443 psi | 74% | 2910 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 47,384 psi | 71% | 2946 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 41,191 psi | 62% | 2779 fps | 96.5% |
| ADI AR 2213 | <<locked>> | 84% | 42,148 psi | 63% | 2825 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 92% | 40,944 psi | 61% | 2789 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 88% | 32,358 psi | 49% | 2618 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,210 psi | 71% | 2917 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,940 psi | 82% | 3035 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,133 psi | 62% | 2772 fps | 96.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,028 psi | 56% | 2707 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,766 psi | 54% | 2671 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,024 psi | 47% | 2575 fps | 96.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,740 psi | 60% | 2818 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 53,621 psi | 80% | 2982 fps | 95.8% |
| Bofors RP15 | <<locked>> | 84% | 39,450 psi | 59% | 2762 fps | 95.9% |
| Bofors RP30 | <<locked>> | 90% | 40,350 psi | 60% | 2805 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 37,028 psi | 56% | 2707 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 51,503 psi | 77% | 2910 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 39,146 psi | 59% | 2753 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 50,952 psi | 76% | 2959 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 53,258 psi | 80% | 2976 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 45,092 psi | 68% | 2835 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 44,179 psi | 66% | 2818 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,585 psi | 67% | 2792 fps | 100% |
| Hodgdon Retumbo | 70.7 gr | 86% | 37,072 psi | 56% | 2789 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 51,198 psi | 77% | 2986 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,818 psi | 42% | 1752 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,963 psi | 70% | 2841 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,750 psi | 79% | 2936 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 46,920 psi | 70% | 2851 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 43,526 psi | 65% | 2772 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 84% | 40,727 psi | 61% | 2805 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 98% | 41,002 psi | 61% | 2835 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 50,415 psi | 76% | 2884 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 48,820 psi | 73% | 2874 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 32,010 psi | 48% | 2516 fps | 96% |
| Norma 204 | <<locked>> | 80% | 47,210 psi | 71% | 2877 fps | 97.9% |
| Norma 217 | <<locked>> | 92% | 33,547 psi | 50% | 2671 fps | 95% |
| Norma MRP | <<locked>> | 80% | 38,928 psi | 58% | 2779 fps | 97.3% |
| Norma URP | <<locked>> | 80% | 48,269 psi | 72% | 2897 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 40,582 psi | 61% | 2812 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 47,094 psi | 71% | 2887 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 36,361 psi | 55% | 2684 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,587 psi | 43% | 1798 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,516 psi | 74% | 2930 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,848 psi | 72% | 2949 fps | 100% |
| ReloadSwiss RS 76 | 73.9 gr | 84% | 33,924 psi | 51% | 2690 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 44,802 psi | 67% | 2923 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 56,391 psi | 85% | 2969 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 42,380 psi | 64% | 2756 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 40,524 psi | 61% | 2756 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 80% | 51,503 psi | 77% | 2910 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,415 psi | 76% | 2884 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 48,820 psi | 73% | 2874 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,767 psi | 84% | 2841 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,298 psi | 74% | 2828 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,190 psi | 60% | 2749 fps | 96.4% |
| Somchem S355 | <<locked>> | 80% | 55,927 psi | 84% | 2966 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 43,279 psi | 65% | 2743 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 45,614 psi | 68% | 2848 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,133 psi | 62% | 2740 fps | 97.5% |
| Vihtavuori N150 | <<locked>> | 80% | 53,577 psi | 80% | 2881 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,690 psi | 74% | 2890 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,694 psi | 54% | 2605 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 49,037 psi | 74% | 2890 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,987 psi | 60% | 2753 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 84% | 45,107 psi | 68% | 2904 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 88% | 42,496 psi | 64% | 2825 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 94% | 45,876 psi | 69% | 2936 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,066 psi | 74% | 2841 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,169 psi | 77% | 2963 fps | 99.6% |
| Winchester StaBALL HD | 67.5 gr | 80% | 32,213 psi | 48% | 2694 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,681 psi | 56% | 2657 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 79 powders for 7 mm STW loaded with the .283 | 140gr | Rhino Penetrator. Hodgdon Retumbo delivers the highest muzzle velocity at 3,255 fps; across all powders the maximum-charge window runs from 1,955 fps to 3,255 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 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 140.0 gr projectile in 0.283" calls for a 1:10.5 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, Winchester StaBALL HD, ReloadSwiss RS 76 rank at the top here: for 7 mm STW with the .283 | 140gr | Rhino Penetrator 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.