Load Specifications
Load data in caliber 7 mm STW with .284 | 160gr | Speer TBBC bullet and 72 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% | 57,217 psi | 86% | 2844 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,856 psi | 87% | 2871 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 60,205 psi | 90% | 3009 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 88% | 58,624 psi | 88% | 2933 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 56,855 psi | 85% | 2943 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 59,219 psi | 89% | 2972 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 51,808 psi | 78% | 2946 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,606 psi | 80% | 2933 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 58,784 psi | 88% | 2923 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 58,146 psi | 87% | 2920 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,232 psi | 86% | 2940 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 58,914 psi | 88% | 2900 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 59,205 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 59,988 psi | 90% | 2992 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 57,232 psi | 86% | 3002 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,696 psi | 86% | 2904 fps | 98% |
| Bofors RP15 | <<locked>> | 94% | 60,205 psi | 90% | 2979 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 58,914 psi | 88% | 2986 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 57,232 psi | 86% | 2940 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 58,711 psi | 88% | 2864 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 56,826 psi | 85% | 2940 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 59,117 psi | 89% | 2920 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 60,176 psi | 90% | 2940 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,958 psi | 88% | 2920 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 58,871 psi | 88% | 2841 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 58,059 psi | 87% | 3058 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 60,365 psi | 90% | 2963 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,492 psi | 56% | 1841 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,348 psi | 86% | 2854 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 60,176 psi | 90% | 2884 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,899 psi | 87% | 2858 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 60,350 psi | 90% | 2913 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 92% | 59,219 psi | 89% | 2986 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,052 psi | 74% | 2844 fps | 99% |
| Lovex S065 | <<locked>> | 82% | 57,522 psi | 86% | 2831 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 59,524 psi | 89% | 2884 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 58,900 psi | 88% | 2867 fps | 100% |
| Norma 204 | <<locked>> | 84% | 58,784 psi | 88% | 2913 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 50,009 psi | 75% | 2874 fps | 100% |
| Norma MRP | <<locked>> | 88% | 57,406 psi | 86% | 2956 fps | 100% |
| Norma URP | <<locked>> | 84% | 59,524 psi | 89% | 2897 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,391 psi | 85% | 2949 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 58,639 psi | 88% | 2910 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 59,088 psi | 89% | 2936 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,551 psi | 58% | 1886 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,914 psi | 87% | 2887 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,550 psi | 85% | 2917 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 59,350 psi | 89% | 3048 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 58,624 psi | 88% | 3012 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 88% | 59,292 psi | 89% | 2904 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 88% | 57,986 psi | 87% | 2913 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 58,711 psi | 88% | 2864 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,522 psi | 86% | 2831 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 59,524 psi | 89% | 2884 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 60,278 psi | 90% | 2838 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,580 psi | 86% | 2910 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 57,072 psi | 86% | 2838 fps | 99.2% |
| Somchem S365 | <<locked>> | 84% | 57,174 psi | 86% | 2851 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 58,305 psi | 87% | 2884 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 57,493 psi | 86% | 2841 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 58,044 psi | 87% | 2867 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 57,116 psi | 86% | 2881 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 82% | 56,681 psi | 85% | 2844 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,145 psi | 86% | 2877 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,913 psi | 85% | 2959 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 94% | 57,537 psi | 86% | 2943 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 98% | 59,146 psi | 89% | 3012 fps | 99.1% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 60,205 psi | 90% | 3071 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,927 psi | 85% | 2789 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 59,379 psi | 89% | 2927 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 58,943 psi | 88% | 2992 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 58,291 psi | 87% | 2881 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% | 40,799 psi | 61% | 2575 fps | 99.5% |
| Accurate 4350 | <<locked>> | 80% | 53,853 psi | 81% | 2812 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 42,177 psi | 63% | 2690 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 44,875 psi | 67% | 2707 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 80% | 40,089 psi | 60% | 2638 fps | 96.3% |
| ADI AR 2217 | <<locked>> | 86% | 36,593 psi | 55% | 2552 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 98% | 48,167 psi | 72% | 2874 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 82% | 29,225 psi | 44% | 2398 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,634 psi | 77% | 2818 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,730 psi | 67% | 2697 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,727 psi | 61% | 2648 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,479 psi | 59% | 2598 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,171 psi | 51% | 2526 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,541 psi | 67% | 2756 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 48,907 psi | 73% | 2861 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,703 psi | 72% | 2733 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 37,913 psi | 57% | 2582 fps | 96.8% |
| Bofors RP30 | <<locked>> | 84% | 36,492 psi | 55% | 2572 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 40,727 psi | 61% | 2648 fps | 97.8% |
| Bofors RP7 | <<locked>> | 80% | 55,114 psi | 83% | 2812 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 34,838 psi | 52% | 2513 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 55,245 psi | 83% | 2864 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 42,830 psi | 64% | 2644 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,945 psi | 63% | 2628 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,428 psi | 73% | 2694 fps | 100% |
| Hodgdon Retumbo | 65 gr | 80% | 33,359 psi | 50% | 2552 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 56,057 psi | 84% | 2900 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,195 psi | 42% | 1647 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,560 psi | 76% | 2749 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 56,536 psi | 85% | 2835 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 50,894 psi | 76% | 2756 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,005 psi | 66% | 2638 fps | 97.1% |
| IMR 7828 SSC | <<locked>> | 80% | 38,841 psi | 58% | 2618 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 92% | 37,304 psi | 56% | 2612 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 54,027 psi | 81% | 2779 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,475 psi | 79% | 2779 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,157 psi | 53% | 2457 fps | 98.4% |
| Norma 204 | <<locked>> | 80% | 51,401 psi | 77% | 2799 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 30,545 psi | 46% | 2454 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 43,323 psi | 65% | 2720 fps | 99.3% |
| Norma URP | <<locked>> | 80% | 52,257 psi | 78% | 2795 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,740 psi | 58% | 2628 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 80% | 51,387 psi | 77% | 2802 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,722 psi | 52% | 2507 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,877 psi | 43% | 1686 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,056 psi | 81% | 2835 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,649 psi | 79% | 2861 fps | 100% |
| ReloadSwiss RS 76 | 69.6 gr | 80% | 32,576 psi | 49% | 2526 fps | 96.9% |
| ReloadSwiss RS 80 | 77.1 gr | 88% | 39,856 psi | 60% | 2674 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 45,759 psi | 69% | 2680 fps | 98% |
| Rottweil R 905 | <<locked>> | 80% | 44,454 psi | 67% | 2690 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 80% | 55,114 psi | 83% | 2812 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,027 psi | 81% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,475 psi | 79% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,026 psi | 79% | 2736 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,121 psi | 66% | 2684 fps | 98.6% |
| Somchem S361 | <<locked>> | 80% | 46,833 psi | 70% | 2667 fps | 97.6% |
| Somchem S365 | <<locked>> | 80% | 49,995 psi | 75% | 2753 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,744 psi | 67% | 2664 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 80% | 53,708 psi | 81% | 2789 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,001 psi | 58% | 2543 fps | 97.9% |
| Vihtavuori N170 | <<locked>> | 94% | 53,563 psi | 80% | 2822 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 52,982 psi | 79% | 2789 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,092 psi | 66% | 2677 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,120 psi | 65% | 2713 fps | 96.8% |
| Vihtavuori N565 | <<locked>> | 82% | 38,247 psi | 57% | 2589 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 88% | 41,234 psi | 62% | 2694 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 94% | 48,544 psi | 73% | 2874 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,229 psi | 80% | 2740 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 55,434 psi | 83% | 2867 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,188 psi | 56% | 2644 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,191 psi | 62% | 2595 fps | 97.9% |
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 72 powders for 7 mm STW loaded with the .284 | 160gr | Speer TBBC. Vihtavuori N570 delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,841 fps to 3,071 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 0.284" 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, ReloadSwiss RS 76, ReloadSwiss RS 80 rank at the top here: for 7 mm STW with the .284 | 160gr | Speer TBBC 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.