Load Specifications
Load data in caliber 7 mm STW with .284 | 156gr | Norma ORYX bullet and 70 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 ReloadSwiss RS 80.
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>> | 90% | 58,552 psi | 88% | 2897 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,885 psi | 88% | 2917 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 57,334 psi | 86% | 2999 fps | 99% |
| ADI AR 2209 | <<locked>> | 88% | 59,785 psi | 90% | 2986 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 58,175 psi | 87% | 2995 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 98% | 56,681 psi | 85% | 2969 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 53,127 psi | 80% | 3002 fps | 96.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 55,172 psi | 83% | 2986 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 59,857 psi | 90% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 59,248 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 58,537 psi | 88% | 2992 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 60,278 psi | 90% | 2953 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,579 psi | 85% | 2966 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 57,145 psi | 86% | 2986 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 59,016 psi | 88% | 3061 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,697 psi | 88% | 2953 fps | 98.1% |
| Bofors RP15 | <<locked>> | 92% | 57,696 psi | 86% | 2976 fps | 99.9% |
| Bofors RP30 | <<locked>> | 96% | 56,405 psi | 85% | 2979 fps | 99.8% |
| Bofors RP5 | <<locked>> | 90% | 58,537 psi | 88% | 2992 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 59,683 psi | 89% | 2913 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 58,320 psi | 87% | 2992 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 60,249 psi | 90% | 2972 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 57,377 psi | 86% | 2930 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 60,191 psi | 90% | 2972 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 60,089 psi | 90% | 2890 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 59,509 psi | 89% | 3107 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,550 psi | 56% | 1873 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 58,392 psi | 88% | 2904 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 59,059 psi | 89% | 2907 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,725 psi | 87% | 2910 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 90% | 56,434 psi | 85% | 2979 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,502 psi | 76% | 2897 fps | 99.1% |
| Lovex S065 | <<locked>> | 82% | 58,479 psi | 88% | 2881 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 56,855 psi | 85% | 2881 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 59,959 psi | 90% | 2913 fps | 100% |
| Norma 204 | <<locked>> | 84% | 59,712 psi | 90% | 2963 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 51,517 psi | 77% | 2927 fps | 100% |
| Norma MRP | <<locked>> | 88% | 58,711 psi | 88% | 3009 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,797 psi | 85% | 2897 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,696 psi | 86% | 3002 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 59,582 psi | 89% | 2956 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 56,115 psi | 84% | 2927 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,580 psi | 58% | 1919 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 59,205 psi | 89% | 2940 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,827 psi | 87% | 2969 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 56,478 psi | 85% | 3038 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 60,307 psi | 90% | 3064 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 86% | 56,565 psi | 85% | 2897 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 88% | 58,943 psi | 88% | 2963 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 59,683 psi | 89% | 2913 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,479 psi | 88% | 2881 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,855 psi | 85% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,406 psi | 86% | 2835 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 58,552 psi | 88% | 2959 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 58,117 psi | 87% | 2887 fps | 99.3% |
| Somchem S365 | <<locked>> | 84% | 58,407 psi | 88% | 2900 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 59,422 psi | 89% | 2933 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 58,494 psi | 88% | 2890 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 59,437 psi | 89% | 2917 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 58,523 psi | 88% | 2933 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 82% | 57,754 psi | 87% | 2894 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 58,508 psi | 88% | 2930 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 58,160 psi | 87% | 3009 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 94% | 59,016 psi | 88% | 2999 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 96% | 56,420 psi | 85% | 3002 fps | 98.8% |
| Vihtavuori N570 | <<locked>> | 98% | 57,566 psi | 86% | 3061 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,986 psi | 87% | 2835 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 60,249 psi | 90% | 2972 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 56,159 psi | 84% | 2982 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 59,466 psi | 89% | 2930 fps | 100% |
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% | 41,713 psi | 63% | 2625 fps | 99.6% |
| Accurate 4350 | <<locked>> | 80% | 54,969 psi | 82% | 2864 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 43,134 psi | 65% | 2740 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 45,629 psi | 68% | 2749 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 80% | 40,959 psi | 61% | 2687 fps | 96.5% |
| ADI AR 2217 | <<locked>> | 86% | 37,420 psi | 56% | 2602 fps | 95.7% |
| ADI AR 2218 | <<locked>> | 98% | 49,284 psi | 74% | 2927 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 82% | 29,834 psi | 45% | 2441 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,605 psi | 79% | 2867 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,643 psi | 68% | 2746 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,640 psi | 62% | 2694 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,379 psi | 61% | 2641 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,853 psi | 52% | 2569 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,614 psi | 68% | 2802 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,862 psi | 70% | 2851 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,542 psi | 68% | 2720 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 38,841 psi | 58% | 2631 fps | 97% |
| Bofors RP30 | <<locked>> | 84% | 37,449 psi | 56% | 2618 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 41,640 psi | 62% | 2694 fps | 98% |
| Bofors RP7 | <<locked>> | 80% | 56,159 psi | 84% | 2864 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 35,505 psi | 53% | 2559 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 56,188 psi | 84% | 2913 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 43,656 psi | 65% | 2690 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,786 psi | 64% | 2674 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,371 psi | 74% | 2740 fps | 100% |
| Hodgdon Retumbo | 67.4 gr | 80% | 34,142 psi | 51% | 2602 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,239 psi | 42% | 1680 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,285 psi | 77% | 2795 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 51,909 psi | 78% | 2805 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,686 psi | 67% | 2684 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 80% | 39,711 psi | 60% | 2667 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 90% | 35,781 psi | 54% | 2598 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 54,853 psi | 82% | 2828 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 53,505 psi | 80% | 2828 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,998 psi | 54% | 2500 fps | 98.5% |
| Norma 204 | <<locked>> | 80% | 52,243 psi | 78% | 2848 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 31,386 psi | 47% | 2500 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 44,164 psi | 66% | 2766 fps | 99.4% |
| Norma URP | <<locked>> | 80% | 53,330 psi | 80% | 2844 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,581 psi | 59% | 2674 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 80% | 52,301 psi | 78% | 2848 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,621 psi | 53% | 2552 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,892 psi | 43% | 1719 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 55,172 psi | 83% | 2884 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,737 psi | 81% | 2910 fps | 100% |
| ReloadSwiss RS 76 | 72.1 gr | 80% | 33,330 psi | 50% | 2572 fps | 97.1% |
| ReloadSwiss RS 80 | 80 gr | 88% | 41,234 psi | 62% | 2730 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 46,688 psi | 70% | 2726 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 80% | 45,237 psi | 68% | 2733 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 80% | 56,159 psi | 84% | 2864 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,853 psi | 82% | 2828 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 53,505 psi | 80% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,722 psi | 81% | 2782 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,889 psi | 67% | 2730 fps | 98.7% |
| Somchem S361 | <<locked>> | 80% | 47,630 psi | 71% | 2717 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 50,879 psi | 76% | 2795 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,643 psi | 68% | 2710 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 54,694 psi | 82% | 2835 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,856 psi | 60% | 2589 fps | 98% |
| Vihtavuori N170 | <<locked>> | 94% | 54,563 psi | 82% | 2871 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 54,128 psi | 81% | 2841 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,976 psi | 67% | 2720 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,918 psi | 66% | 2756 fps | 96.9% |
| Vihtavuori N565 | <<locked>> | 82% | 39,030 psi | 59% | 2631 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 88% | 42,322 psi | 63% | 2743 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 94% | 49,734 psi | 75% | 2927 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 54,143 psi | 81% | 2785 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 56,420 psi | 85% | 2917 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,261 psi | 57% | 2690 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,989 psi | 63% | 2638 fps | 98% |
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 70 powders for 7 mm STW loaded with the .284 | 156gr | Norma ORYX. Hodgdon Retumbo delivers the highest muzzle velocity at 3,107 fps; across all powders the maximum-charge window runs from 1,873 fps to 3,107 fps. ADI AR 2218 gives the best case fill at 100 %, and 70 of the 70 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 156.0 gr projectile in 0.284" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, 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, ReloadSwiss RS 80 rank at the top here: for 7 mm STW with the .284 | 156gr | Norma ORYX 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.