Load Specifications
Bullet:.284 | 170gr | Norma ORYX
Bullet Manufacturer:Norma
Bullet Weight:170 gr
Bullet Diameter:0.284"
Bullet Length:<<locked>>
Caliber:7 mm STW load data
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:97 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:66,717 psi
Recommended Twist Rate:1:12.0
Load data in caliber 7 mm STW with .284 | 170gr | Norma ORYX bullet and 126 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo 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.
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>> | 88% | 57,508 psi | 86% | 2776 fps | 100% |
| Accurate 3100 | <<locked>> | 88% | 56,855 psi | 85% | 2766 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 58,726 psi | 88% | 2923 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 86% | 56,405 psi | 85% | 2877 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 88% | 59,988 psi | 90% | 2933 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 86% | 58,508 psi | 88% | 2858 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 58,088 psi | 87% | 2854 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 57,203 psi | 86% | 2877 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 88% | 56,536 psi | 85% | 2867 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 98% | 59,741 psi | 90% | 2907 fps | 100% |
| ADI AR 2217 | <<locked>> | 98% | 59,103 psi | 89% | 2900 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,318 psi | 84% | 2966 fps | 98.5% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,608 psi | 83% | 2956 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 58,610 psi | 88% | 2927 fps | 100% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,943 psi | 87% | 2920 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 58,276 psi | 87% | 2848 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 58,697 psi | 88% | 2841 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 58,392 psi | 88% | 2835 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 58,073 psi | 87% | 2848 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 57,638 psi | 86% | 2841 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,638 psi | 86% | 2871 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,971 psi | 85% | 2861 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 59,379 psi | 89% | 2828 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 58,900 psi | 88% | 2822 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 59,828 psi | 90% | 2900 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 59,176 psi | 89% | 2890 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,391 psi | 85% | 2864 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 59,988 psi | 90% | 2913 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 58,102 psi | 87% | 2946 fps | 98.6% |
| Alliant Reloder-33 | <<locked>> | 98% | 57,305 psi | 86% | 2936 fps | 98.4% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 53,461 psi | 80% | 2867 fps | 97.3% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 52,736 psi | 79% | 2854 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,609 psi | 86% | 2838 fps | 98.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,101 psi | 86% | 2828 fps | 98.5% |
| Bofors RP15 | <<locked>> | 90% | 56,811 psi | 85% | 2858 fps | 100% |
| Bofors RP15 | <<locked>> | 92% | 60,118 psi | 90% | 2904 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 59,683 psi | 89% | 2920 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 59,045 psi | 89% | 2913 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 57,638 psi | 86% | 2871 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 56,971 psi | 85% | 2861 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 57,421 psi | 86% | 2874 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 56,768 psi | 85% | 2864 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 59,973 psi | 90% | 2864 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 88% | 59,553 psi | 89% | 2858 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 59,001 psi | 88% | 2851 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 58,363 psi | 87% | 2841 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 58,871 psi | 88% | 2766 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 58,363 psi | 87% | 2759 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 58,987 psi | 88% | 2989 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 58,233 psi | 87% | 2979 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,710 psi | 57% | 1801 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,768 psi | 57% | 1798 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 56,927 psi | 85% | 2779 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 60,321 psi | 90% | 2825 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,928 psi | 87% | 2782 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,421 psi | 86% | 2776 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 60,162 psi | 90% | 2844 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 88% | 59,553 psi | 89% | 2835 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 90% | 59,364 psi | 89% | 2917 fps | 100% |
| IMR 7828 SSC | <<locked>> | 90% | 58,914 psi | 88% | 2907 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,766 psi | 81% | 2854 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,142 psi | 80% | 2841 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 60,205 psi | 90% | 2792 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 59,364 psi | 89% | 2808 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 58,900 psi | 88% | 2802 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 59,146 psi | 89% | 2799 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 58,494 psi | 88% | 2789 fps | 100% |
| Norma 204 | <<locked>> | 82% | 58,392 psi | 88% | 2838 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,928 psi | 87% | 2831 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 54,839 psi | 82% | 2874 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 54,215 psi | 81% | 2864 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,725 psi | 87% | 2884 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,014 psi | 85% | 2874 fps | 100% |
| Norma URP | <<locked>> | 82% | 59,480 psi | 89% | 2822 fps | 100% |
| Norma URP | <<locked>> | 82% | 58,972 psi | 88% | 2815 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 56,797 psi | 85% | 2881 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 56,057 psi | 84% | 2871 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 58,407 psi | 88% | 2831 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 57,943 psi | 87% | 2825 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 59,509 psi | 89% | 2871 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 58,842 psi | 88% | 2861 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,798 psi | 58% | 1844 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,682 psi | 58% | 1837 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 60,147 psi | 90% | 2887 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 60,263 psi | 90% | 2982 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 59,582 psi | 89% | 2972 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 59,509 psi | 89% | 2953 fps | 99.8% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 58,682 psi | 88% | 2940 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 86% | 59,001 psi | 88% | 2828 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 86% | 58,595 psi | 88% | 2822 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 86% | 58,030 psi | 87% | 2844 fps | 100% |
| Rottweil R 905 | <<locked>> | 86% | 57,290 psi | 86% | 2831 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 60,205 psi | 90% | 2792 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 59,364 psi | 89% | 2808 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 58,900 psi | 88% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 59,814 psi | 90% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 59,364 psi | 89% | 2756 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,638 psi | 86% | 2838 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,942 psi | 85% | 2828 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 56,811 psi | 85% | 2769 fps | 99.6% |
| Somchem S361 | <<locked>> | 86% | 60,205 psi | 90% | 2815 fps | 99.8% |
| Somchem S365 | <<locked>> | 82% | 57,203 psi | 86% | 2772 fps | 100% |
| Somchem S365 | <<locked>> | 82% | 56,666 psi | 85% | 2766 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 58,305 psi | 87% | 2812 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,638 psi | 86% | 2802 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 58,160 psi | 87% | 2799 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,798 psi | 87% | 2792 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,406 psi | 86% | 2822 fps | 97% |
| Vihtavuori N170 | <<locked>> | 94% | 56,869 psi | 85% | 2812 fps | 96.9% |
| Vihtavuori N550 | <<locked>> | 82% | 60,205 psi | 90% | 2818 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 59,770 psi | 90% | 2808 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 57,479 psi | 86% | 2805 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 57,000 psi | 85% | 2799 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,087 psi | 86% | 2887 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 86% | 56,434 psi | 85% | 2877 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 92% | 58,030 psi | 87% | 2881 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 92% | 57,392 psi | 86% | 2871 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 96% | 59,727 psi | 90% | 2949 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 96% | 59,088 psi | 89% | 2940 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 96% | 56,956 psi | 85% | 2949 fps | 98.1% |
| Vihtavuori N570 | <<locked>> | 96% | 56,347 psi | 84% | 2940 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 60,002 psi | 90% | 2753 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 59,944 psi | 90% | 2920 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 59,350 psi | 89% | 2913 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 58,117 psi | 87% | 2808 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,696 psi | 86% | 2802 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% | 44,019 psi | 66% | 2569 fps | 100% |
| Accurate 3100 | <<locked>> | 80% | 43,555 psi | 65% | 2562 fps | 99.9% |
| Accurate High Country | <<locked>> | 80% | 47,688 psi | 71% | 2740 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 80% | 45,571 psi | 68% | 2694 fps | 97.6% |
| Accurate MAGPRO | <<locked>> | 80% | 45,150 psi | 68% | 2684 fps | 97.4% |
| ADI AR 2209 | <<locked>> | 80% | 47,964 psi | 72% | 2694 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 80% | 47,500 psi | 71% | 2684 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 43,221 psi | 65% | 2638 fps | 98% |
| ADI AR 2213 | <<locked>> | 80% | 42,786 psi | 64% | 2628 fps | 97.9% |
| ADI AR 2217 | <<locked>> | 82% | 34,519 psi | 52% | 2448 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 82% | 34,171 psi | 51% | 2434 fps | 95.3% |
| ADI AR 2218 | <<locked>> | 94% | 45,121 psi | 68% | 2753 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 94% | 44,483 psi | 67% | 2736 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 80% | 29,559 psi | 44% | 2356 fps | 96.5% |
| ADI AR 2225 | <<locked>> | 80% | 29,225 psi | 44% | 2346 fps | 96.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 47,921 psi | 72% | 2684 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 54,998 psi | 82% | 2789 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 54,665 psi | 82% | 2785 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,921 psi | 72% | 2687 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,471 psi | 71% | 2677 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,990 psi | 66% | 2644 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,540 psi | 65% | 2635 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,685 psi | 64% | 2582 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,221 psi | 63% | 2575 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,999 psi | 55% | 2526 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,564 psi | 55% | 2520 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,472 psi | 73% | 2746 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,964 psi | 72% | 2740 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 46,282 psi | 69% | 2746 fps | 96% |
| Alliant Reloder-33 | <<locked>> | 92% | 45,745 psi | 69% | 2736 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 96% | 45,963 psi | 69% | 2733 fps | 95.2% |
| Alliant Reloder-50 | <<locked>> | 96% | 45,426 psi | 68% | 2723 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 44,483 psi | 67% | 2612 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 44,193 psi | 66% | 2605 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 40,857 psi | 61% | 2579 fps | 98.4% |
| Bofors RP15 | <<locked>> | 80% | 40,582 psi | 61% | 2575 fps | 98.3% |
| Bofors RP30 | <<locked>> | 80% | 34,606 psi | 52% | 2464 fps | 95.7% |
| Bofors RP30 | <<locked>> | 80% | 34,171 psi | 51% | 2451 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 43,990 psi | 66% | 2644 fps | 99.1% |
| Bofors RP5 | <<locked>> | 80% | 43,540 psi | 65% | 2635 fps | 99% |
| Hodgdon H1000 | <<locked>> | 80% | 34,998 psi | 52% | 2461 fps | 96.5% |
| Hodgdon H1000 | <<locked>> | 80% | 34,650 psi | 52% | 2451 fps | 96.2% |
| Hodgdon H4831 | <<locked>> | 80% | 45,759 psi | 69% | 2638 fps | 98% |
| Hodgdon H4831 | <<locked>> | 80% | 45,339 psi | 68% | 2628 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,005 psi | 67% | 2625 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,585 psi | 67% | 2615 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,764 psi | 78% | 2671 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,227 psi | 77% | 2664 fps | 100% |
| Hodgdon Retumbo | 65.8 gr | 80% | 36,114 psi | 54% | 2566 fps | 98% |
| Hodgdon Retumbo | 65.8 gr | 80% | 35,694 psi | 54% | 2552 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,413 psi | 43% | 1611 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,384 psi | 43% | 1611 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,534 psi | 80% | 2726 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,098 psi | 80% | 2720 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 54,186 psi | 81% | 2733 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,679 psi | 80% | 2723 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,673 psi | 70% | 2628 fps | 98.3% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,296 psi | 69% | 2621 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 80% | 41,872 psi | 63% | 2618 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 80% | 41,597 psi | 62% | 2615 fps | 97.6% |
| IMR 8133 Enduron | <<locked>> | 86% | 33,344 psi | 50% | 2451 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 88% | 35,317 psi | 53% | 2497 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 56,608 psi | 85% | 2746 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 55,579 psi | 83% | 2756 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 55,332 psi | 83% | 2753 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 37,942 psi | 57% | 2454 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 37,507 psi | 56% | 2444 fps | 99.4% |
| Norma 204 | <<locked>> | 80% | 54,563 psi | 82% | 2782 fps | 99.9% |
| Norma 204 | <<locked>> | 80% | 54,128 psi | 81% | 2772 fps | 99.9% |
| Norma 217 | <<locked>> | 82% | 29,225 psi | 44% | 2356 fps | 95.4% |
| Norma 217 | <<locked>> | 82% | 28,848 psi | 43% | 2346 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 46,688 psi | 70% | 2713 fps | 99.9% |
| Norma MRP | <<locked>> | 80% | 46,195 psi | 69% | 2703 fps | 99.9% |
| Norma URP | <<locked>> | 80% | 55,608 psi | 83% | 2769 fps | 100% |
| Norma URP | <<locked>> | 80% | 55,332 psi | 83% | 2766 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 42,192 psi | 63% | 2635 fps | 98.2% |
| Ramshot Grand | <<locked>> | 80% | 41,524 psi | 62% | 2621 fps | 98% |
| Ramshot Hunter | <<locked>> | 80% | 54,679 psi | 82% | 2779 fps | 100% |
| Ramshot Hunter | <<locked>> | 80% | 54,230 psi | 81% | 2772 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,884 psi | 57% | 2513 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 80% | 37,478 psi | 56% | 2507 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,124 psi | 44% | 1650 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,095 psi | 44% | 1647 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 55,869 psi | 84% | 2828 fps | 100% |
| ReloadSwiss RS 76 | 70.5 gr | 80% | 35,462 psi | 53% | 2543 fps | 98.8% |
| ReloadSwiss RS 76 | 70.5 gr | 80% | 35,085 psi | 53% | 2533 fps | 98.7% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 37,652 psi | 56% | 2559 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 37,260 psi | 56% | 2552 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 48,646 psi | 73% | 2667 fps | 99% |
| Rottweil R 904 | <<locked>> | 80% | 48,196 psi | 72% | 2657 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 80% | 47,587 psi | 71% | 2680 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 47,108 psi | 71% | 2671 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 56,608 psi | 85% | 2746 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 55,579 psi | 83% | 2756 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 55,332 psi | 83% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 55,956 psi | 84% | 2710 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 55,535 psi | 83% | 2703 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,253 psi | 71% | 2674 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,775 psi | 70% | 2664 fps | 99.4% |
| Somchem S361 | <<locked>> | 80% | 49,748 psi | 75% | 2657 fps | 98.8% |
| Somchem S361 | <<locked>> | 80% | 49,197 psi | 74% | 2648 fps | 98.6% |
| Somchem S365 | <<locked>> | 80% | 53,606 psi | 80% | 2726 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 53,084 psi | 80% | 2720 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,935 psi | 72% | 2654 fps | 99.9% |
| Somchem S385 | <<locked>> | 80% | 47,500 psi | 71% | 2644 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 41,945 psi | 63% | 2536 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 80% | 41,553 psi | 62% | 2530 fps | 99% |
| Vihtavuori N170 | <<locked>> | 90% | 50,053 psi | 75% | 2703 fps | 95.3% |
| Vihtavuori N170 | <<locked>> | 90% | 49,705 psi | 75% | 2694 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 56,434 psi | 85% | 2769 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 55,970 psi | 84% | 2759 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 47,456 psi | 71% | 2657 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 46,920 psi | 70% | 2651 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,325 psi | 69% | 2707 fps | 98.3% |
| Vihtavuori N560 | <<locked>> | 80% | 45,847 psi | 69% | 2700 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 80% | 38,682 psi | 58% | 2533 fps | 96.4% |
| Vihtavuori N565 | <<locked>> | 80% | 38,101 psi | 57% | 2523 fps | 96.2% |
| Vihtavuori N568 | <<locked>> | 84% | 39,030 psi | 59% | 2579 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 86% | 41,307 psi | 62% | 2631 fps | 96% |
| Vihtavuori N570 | 78.6 gr | 90% | 45,832 psi | 69% | 2753 fps | 95.4% |
| Vihtavuori N570 | 76.9 gr | 90% | 45,426 psi | 68% | 2746 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 56,202 psi | 84% | 2707 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,118 psi | 62% | 2641 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,553 psi | 61% | 2635 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,222 psi | 66% | 2589 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,816 psi | 66% | 2582 fps | 99% |
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 126 powders for 7 mm STW loaded with the .284 | 170gr | Norma ORYX. Hodgdon Retumbo delivers the highest muzzle velocity at 2,989 fps; across all powders the maximum-charge window runs from 1,798 fps to 2,989 fps. ADI AR 2218 gives the best case fill at 100 %, and 126 of the 126 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (460 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, 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 N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 7 mm STW with the .284 | 170gr | 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.