Load Specifications
Load data in caliber 7 mm STW with .283 | 160gr | 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, 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 60,133 psi | 90% | 2884 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,637 psi | 85% | 2851 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 59,001 psi | 88% | 2989 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 88% | 57,595 psi | 86% | 2917 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 59,872 psi | 90% | 2989 fps | 99.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 58,102 psi | 87% | 2953 fps | 99.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,533 psi | 79% | 2917 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 57,798 psi | 87% | 2910 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,841 psi | 87% | 2907 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,145 psi | 86% | 2907 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 60,118 psi | 90% | 2979 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 57,841 psi | 87% | 2887 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 57,667 psi | 86% | 2953 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 58,610 psi | 88% | 2976 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 55,695 psi | 83% | 2979 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 56,536 psi | 85% | 2884 fps | 97.7% |
| Bofors RP15 | <<locked>> | 94% | 59,248 psi | 89% | 2966 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 57,464 psi | 86% | 2963 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 60,118 psi | 90% | 2979 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 57,885 psi | 87% | 2851 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 59,756 psi | 90% | 2979 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 58,015 psi | 87% | 2904 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 60,176 psi | 90% | 2917 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 59,016 psi | 88% | 2920 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,015 psi | 87% | 2904 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,986 psi | 87% | 2828 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 56,782 psi | 85% | 3038 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 59,103 psi | 89% | 2943 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,550 psi | 56% | 1834 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 60,046 psi | 90% | 2890 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 59,379 psi | 89% | 2871 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,014 psi | 85% | 2841 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 59,437 psi | 89% | 2897 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 92% | 57,928 psi | 87% | 2966 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,950 psi | 72% | 2828 fps | 98.7% |
| Lovex S065 | <<locked>> | 82% | 56,695 psi | 85% | 2818 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 58,726 psi | 88% | 2871 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,638 psi | 86% | 2851 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,769 psi | 87% | 2897 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 48,602 psi | 73% | 2851 fps | 99.9% |
| Norma MRP | <<locked>> | 90% | 60,307 psi | 90% | 2999 fps | 100% |
| Norma URP | <<locked>> | 84% | 58,624 psi | 88% | 2884 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 59,205 psi | 89% | 2989 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 57,595 psi | 86% | 2894 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 57,624 psi | 86% | 2917 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,435 psi | 58% | 1877 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,797 psi | 85% | 2871 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 59,611 psi | 89% | 2959 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 57,885 psi | 87% | 3031 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 56,985 psi | 85% | 2986 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 88% | 58,320 psi | 87% | 2884 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 56,942 psi | 85% | 2900 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 57,885 psi | 87% | 2851 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,695 psi | 85% | 2818 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 58,726 psi | 88% | 2871 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 59,509 psi | 89% | 2825 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 60,205 psi | 90% | 2946 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 60,133 psi | 90% | 2877 fps | 99.5% |
| Somchem S365 | <<locked>> | 86% | 59,857 psi | 90% | 2884 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,363 psi | 86% | 2867 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 60,336 psi | 90% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 60,249 psi | 90% | 2874 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,145 psi | 86% | 2851 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 60,017 psi | 90% | 2920 fps | 96.6% |
| Vihtavuori N550 | <<locked>> | 84% | 59,538 psi | 89% | 2881 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 59,872 psi | 90% | 2913 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 59,770 psi | 90% | 2999 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 96% | 60,220 psi | 90% | 2982 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 98% | 57,508 psi | 86% | 2989 fps | 98.9% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 58,798 psi | 88% | 3051 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 59,973 psi | 90% | 2825 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 58,262 psi | 87% | 2907 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,435 psi | 86% | 2972 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,116 psi | 86% | 2861 fps | 99.9% |
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% | 40,001 psi | 60% | 2559 fps | 99.3% |
| Accurate 4350 | <<locked>> | 80% | 52,910 psi | 79% | 2799 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 41,423 psi | 62% | 2674 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 44,048 psi | 66% | 2687 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 80% | 39,363 psi | 59% | 2621 fps | 96% |
| ADI AR 2217 | <<locked>> | 86% | 35,984 psi | 54% | 2536 fps | 95% |
| ADI AR 2225 | <<locked>> | 84% | 30,632 psi | 46% | 2441 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 44,353 psi | 66% | 2687 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,676 psi | 76% | 2802 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,961 psi | 66% | 2680 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,943 psi | 60% | 2628 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,798 psi | 58% | 2585 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,460 psi | 50% | 2510 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,439 psi | 65% | 2736 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 47,718 psi | 72% | 2841 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 46,876 psi | 70% | 2713 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 37,304 psi | 56% | 2569 fps | 96.6% |
| Bofors RP30 | <<locked>> | 84% | 35,563 psi | 53% | 2549 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 39,943 psi | 60% | 2628 fps | 97.5% |
| Bofors RP7 | <<locked>> | 80% | 54,491 psi | 82% | 2799 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 34,200 psi | 51% | 2497 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 54,346 psi | 81% | 2851 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 56,434 psi | 85% | 2861 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 41,916 psi | 63% | 2625 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,205 psi | 62% | 2608 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,732 psi | 72% | 2684 fps | 100% |
| Hodgdon Retumbo | 63.9 gr | 80% | 32,677 psi | 49% | 2533 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 55,042 psi | 83% | 2884 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,094 psi | 42% | 1640 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,748 psi | 75% | 2733 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 55,738 psi | 84% | 2818 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 49,995 psi | 75% | 2743 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,294 psi | 65% | 2621 fps | 96.8% |
| IMR 7828 SSC | 63.8 gr | 80% | 38,087 psi | 57% | 2602 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 92% | 36,477 psi | 55% | 2592 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 53,403 psi | 80% | 2769 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,880 psi | 78% | 2766 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,548 psi | 52% | 2441 fps | 98.2% |
| Norma 204 | <<locked>> | 80% | 50,357 psi | 75% | 2782 fps | 99.3% |
| Norma 217 | <<locked>> | 88% | 31,908 psi | 48% | 2497 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 42,279 psi | 63% | 2700 fps | 99.1% |
| Norma URP | <<locked>> | 80% | 51,576 psi | 77% | 2785 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,985 psi | 57% | 2608 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 50,372 psi | 76% | 2785 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,040 psi | 51% | 2490 fps | 96.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,776 psi | 43% | 1680 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,156 psi | 80% | 2818 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,561 psi | 77% | 2844 fps | 100% |
| ReloadSwiss RS 76 | 68.4 gr | 80% | 31,850 psi | 48% | 2503 fps | 96.4% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 41,872 psi | 63% | 2720 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 44,976 psi | 67% | 2661 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 80% | 43,613 psi | 65% | 2671 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 80% | 54,491 psi | 82% | 2799 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,403 psi | 80% | 2769 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,880 psi | 78% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,272 psi | 78% | 2720 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,279 psi | 65% | 2667 fps | 98.4% |
| Somchem S361 | <<locked>> | 80% | 45,992 psi | 69% | 2651 fps | 97.3% |
| Somchem S365 | <<locked>> | 80% | 49,023 psi | 73% | 2736 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,976 psi | 66% | 2648 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 80% | 56,797 psi | 85% | 2756 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 52,823 psi | 79% | 2772 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,261 psi | 57% | 2523 fps | 97.6% |
| Vihtavuori N170 | <<locked>> | 96% | 56,159 psi | 84% | 2861 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 52,185 psi | 78% | 2776 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,192 psi | 65% | 2661 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,134 psi | 63% | 2690 fps | 96.4% |
| Vihtavuori N565 | <<locked>> | 82% | 37,362 psi | 56% | 2569 fps | 95% |
| Vihtavuori N568 | <<locked>> | 90% | 43,250 psi | 65% | 2736 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 96% | 50,908 psi | 76% | 2917 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,286 psi | 78% | 2726 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 54,592 psi | 82% | 2854 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,027 psi | 54% | 2625 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,466 psi | 61% | 2579 fps | 97.6% |
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 74 powders for 7 mm STW loaded with the .283 | 160gr | Rhino Penetrator. Vihtavuori N570 delivers the highest muzzle velocity at 3,051 fps; across all powders the maximum-charge window runs from 1,834 fps to 3,051 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 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 160.0 gr projectile in 0.283" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 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 .283 | 160gr | Rhino Penetrator 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.