Load Specifications
Load data in caliber 7 mm STW with .284 | 145gr | CutEdge LZR MAX bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Ramshot Grand and Accurate MAGPRO.
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% | 58,001 psi | 87% | 2982 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 58,842 psi | 88% | 3012 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 57,000 psi | 85% | 3081 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 82% | 59,146 psi | 89% | 2972 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 60,220 psi | 90% | 3081 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 94% | 58,146 psi | 87% | 3084 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,286 psi | 78% | 2979 fps | 98.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,789 psi | 70% | 2936 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 88% | 60,162 psi | 90% | 3074 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,319 psi | 86% | 3028 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 59,553 psi | 89% | 3064 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 58,204 psi | 87% | 3077 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 59,480 psi | 89% | 3041 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 59,335 psi | 89% | 3107 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,391 psi | 85% | 3077 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 59,480 psi | 89% | 3038 fps | 97.2% |
| Bofors RP15 | <<locked>> | 96% | 57,290 psi | 86% | 3061 fps | 99.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,143 psi | 83% | 3048 fps | 99.2% |
| Bofors RP5 | <<locked>> | 94% | 58,204 psi | 87% | 3077 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 57,058 psi | 86% | 2963 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,841 psi | 87% | 3071 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 56,884 psi | 85% | 3015 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 59,437 psi | 89% | 3031 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 92% | 57,856 psi | 87% | 3022 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,652 psi | 85% | 3002 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 60,336 psi | 90% | 2992 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 58,233 psi | 87% | 3189 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 57,841 psi | 87% | 3051 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,115 psi | 56% | 1916 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 59,059 psi | 89% | 3002 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 58,537 psi | 88% | 2986 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 59,364 psi | 89% | 3005 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 58,479 psi | 88% | 3002 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 96% | 60,147 psi | 90% | 3123 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,032 psi | 63% | 2828 fps | 96.3% |
| Lovex S065 | <<locked>> | 86% | 59,176 psi | 89% | 2982 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,566 psi | 86% | 2979 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 59,030 psi | 88% | 2995 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,739 psi | 85% | 3005 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 42,438 psi | 64% | 2858 fps | 98.6% |
| Norma MRP | <<locked>> | 92% | 58,334 psi | 87% | 3100 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,261 psi | 86% | 2999 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,029 psi | 85% | 3084 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 60,191 psi | 90% | 3058 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 60,075 psi | 90% | 3074 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,898 psi | 57% | 1959 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 59,277 psi | 89% | 3038 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,986 psi | 87% | 3068 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 59,741 psi | 90% | 3186 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,389 psi | 82% | 3064 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 82% | 58,407 psi | 88% | 2956 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 57,217 psi | 86% | 2989 fps | 99% |
| Rottweil R 905 | <<locked>> | 92% | 59,016 psi | 88% | 3051 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 57,058 psi | 86% | 2963 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 59,176 psi | 89% | 2982 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,566 psi | 86% | 2979 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,986 psi | 87% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 58,697 psi | 88% | 2936 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 58,566 psi | 88% | 3048 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 57,943 psi | 87% | 2949 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 59,117 psi | 89% | 2982 fps | 98.8% |
| Somchem S365 | <<locked>> | 88% | 58,001 psi | 87% | 2995 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 59,538 psi | 89% | 3022 fps | 100% |
| Vihtavuori N150 | <<locked>> | 84% | 59,466 psi | 89% | 2920 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 58,987 psi | 88% | 2989 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 59,422 psi | 89% | 3002 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 58,160 psi | 87% | 2992 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,711 psi | 87% | 3018 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 58,015 psi | 87% | 3097 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 98% | 58,015 psi | 87% | 3071 fps | 99% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,042 psi | 83% | 3071 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 58,900 psi | 88% | 2940 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,130 psi | 86% | 3018 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 58,610 psi | 88% | 3130 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 59,915 psi | 90% | 3022 fps | 99.8% |
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% | 35,549 psi | 53% | 2575 fps | 97.6% |
| Accurate 4350 | <<locked>> | 80% | 47,805 psi | 72% | 2844 fps | 100% |
| Accurate MAGPRO | 72.6 gr | 86% | 45,730 psi | 69% | 2877 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 55,622 psi | 83% | 2920 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 39,813 psi | 60% | 2713 fps | 96.3% |
| ADI AR 2213 | <<locked>> | 84% | 40,915 psi | 61% | 2762 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 92% | 39,552 psi | 59% | 2723 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 90% | 33,199 psi | 50% | 2615 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,890 psi | 69% | 2854 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,461 psi | 80% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,929 psi | 60% | 2710 fps | 96.4% |
| Alliant Reloder-22 | <<locked>> | 82% | 38,348 psi | 57% | 2707 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,301 psi | 51% | 2605 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,646 psi | 44% | 2503 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,985 psi | 57% | 2749 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 52,460 psi | 79% | 2923 fps | 95.7% |
| Bofors RP15 | <<locked>> | 84% | 38,029 psi | 57% | 2697 fps | 95.7% |
| Bofors RP30 | <<locked>> | 90% | 38,609 psi | 58% | 2733 fps | 95.2% |
| Bofors RP5 | <<locked>> | 82% | 38,348 psi | 57% | 2707 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 50,198 psi | 75% | 2851 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 88% | 37,710 psi | 57% | 2684 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 49,530 psi | 74% | 2894 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 52,127 psi | 78% | 2913 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 43,700 psi | 66% | 2772 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,931 psi | 64% | 2756 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,163 psi | 65% | 2730 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 35,636 psi | 53% | 2720 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 49,734 psi | 75% | 2923 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,688 psi | 42% | 1716 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,643 psi | 68% | 2779 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,663 psi | 77% | 2877 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 45,455 psi | 68% | 2789 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 42,308 psi | 63% | 2713 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 86% | 42,134 psi | 63% | 2802 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 98% | 39,291 psi | 59% | 2766 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 49,066 psi | 74% | 2822 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 47,442 psi | 71% | 2812 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 30,327 psi | 45% | 2444 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 45,876 psi | 69% | 2818 fps | 97.8% |
| Norma 217 | <<locked>> | 94% | 34,272 psi | 51% | 2664 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 37,434 psi | 56% | 2710 fps | 97% |
| Norma URP | <<locked>> | 80% | 46,862 psi | 70% | 2831 fps | 100% |
| Ramshot Grand | 69.1 gr | 84% | 39,088 psi | 59% | 2743 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 45,716 psi | 69% | 2825 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 34,722 psi | 52% | 2612 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,268 psi | 42% | 1755 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,964 psi | 72% | 2864 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,311 psi | 69% | 2884 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 32,430 psi | 49% | 2618 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 42,743 psi | 64% | 2848 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 54,839 psi | 82% | 2907 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 41,176 psi | 62% | 2697 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 39,175 psi | 59% | 2694 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 80% | 50,198 psi | 75% | 2851 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,066 psi | 74% | 2822 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 47,442 psi | 71% | 2812 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 54,476 psi | 82% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,037 psi | 72% | 2769 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,856 psi | 58% | 2687 fps | 96.2% |
| Somchem S355 | <<locked>> | 80% | 54,476 psi | 82% | 2900 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 41,916 psi | 63% | 2680 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 43,932 psi | 66% | 2782 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,740 psi | 60% | 2674 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 80% | 52,243 psi | 78% | 2825 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,370 psi | 73% | 2828 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,418 psi | 52% | 2543 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 47,543 psi | 71% | 2825 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,319 psi | 57% | 2684 fps | 99.6% |
| Vihtavuori N560 | 69.6 gr | 84% | 43,424 psi | 65% | 2831 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 88% | 40,712 psi | 61% | 2756 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 96% | 47,471 psi | 71% | 2933 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,688 psi | 71% | 2782 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,763 psi | 75% | 2900 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,530 psi | 46% | 2618 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,289 psi | 54% | 2595 fps | 95.1% |
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 80 powders for 7 mm STW loaded with the .284 | 145gr | CutEdge LZR MAX. Hodgdon Retumbo delivers the highest muzzle velocity at 3,189 fps; across all powders the maximum-charge window runs from 1,916 fps to 3,189 fps. ADI AR 2217 gives the best case fill at 100 %, and 80 of the 80 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 145.0 gr projectile in 0.284" calls for a 1:8.5 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. Vihtavuori N560, Ramshot Grand, Accurate MAGPRO rank at the top here: for 7 mm STW with the .284 | 145gr | CutEdge LZR MAX 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.