Load Specifications
Load data in caliber 7 mm STW with .284 | 150gr | Remington PSP Core-Lokt bullet and 73 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 Winchester StaBALL HD.
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% | 60,205 psi | 90% | 2966 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,739 psi | 85% | 2936 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 59,016 psi | 88% | 3068 fps | 99% |
| ADI AR 2209 | <<locked>> | 88% | 57,740 psi | 87% | 3002 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 92% | 59,886 psi | 90% | 3071 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 58,146 psi | 87% | 3035 fps | 99.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,678 psi | 79% | 2995 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,682 psi | 86% | 2992 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,276 psi | 86% | 2989 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 60,089 psi | 90% | 3061 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 57,812 psi | 87% | 2969 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 57,972 psi | 87% | 3038 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 58,769 psi | 88% | 3058 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,028 psi | 84% | 3058 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 56,695 psi | 85% | 2963 fps | 97.3% |
| Bofors RP15 | <<locked>> | 94% | 59,205 psi | 89% | 3048 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 57,827 psi | 87% | 3048 fps | 99.7% |
| Bofors RP5 | <<locked>> | 92% | 60,089 psi | 90% | 3061 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 57,899 psi | 87% | 2936 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 60,075 psi | 90% | 3064 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 58,001 psi | 87% | 2989 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 60,205 psi | 90% | 3002 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 59,088 psi | 89% | 3002 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 90% | 57,914 psi | 87% | 2986 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 58,015 psi | 87% | 2913 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 56,710 psi | 85% | 3120 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 59,234 psi | 89% | 3028 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 56% | 1906 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 60,104 psi | 90% | 2976 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 59,321 psi | 89% | 2956 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,014 psi | 85% | 2930 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 59,509 psi | 89% | 2979 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 92% | 57,957 psi | 87% | 3048 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,051 psi | 72% | 2900 fps | 98.4% |
| Lovex S065 | <<locked>> | 84% | 60,278 psi | 90% | 2953 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 58,784 psi | 88% | 2956 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,798 psi | 87% | 2933 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,740 psi | 87% | 2979 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 48,907 psi | 73% | 2930 fps | 99.8% |
| Norma MRP | <<locked>> | 88% | 56,217 psi | 84% | 3022 fps | 100% |
| Norma URP | <<locked>> | 84% | 58,639 psi | 88% | 2972 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 59,248 psi | 89% | 3071 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 57,580 psi | 86% | 2976 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 57,914 psi | 87% | 3002 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,334 psi | 57% | 1949 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,869 psi | 85% | 2959 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 59,625 psi | 89% | 3045 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 58,102 psi | 87% | 3110 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 57,493 psi | 86% | 3071 fps | 99% |
| Rottweil R 904 | <<locked>> | 88% | 58,291 psi | 87% | 2969 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 88% | 56,855 psi | 85% | 2979 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 57,899 psi | 87% | 2936 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 60,278 psi | 90% | 2953 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 58,784 psi | 88% | 2956 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 59,480 psi | 89% | 2907 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 60,249 psi | 90% | 3028 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 60,046 psi | 90% | 2956 fps | 99.3% |
| Somchem S365 | <<locked>> | 86% | 59,988 psi | 90% | 2972 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,188 psi | 86% | 2946 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 60,336 psi | 90% | 2887 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 60,191 psi | 90% | 2959 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,203 psi | 86% | 2933 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 60,263 psi | 90% | 3002 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 84% | 59,379 psi | 89% | 2963 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 59,973 psi | 90% | 2999 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 59,915 psi | 90% | 3084 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 94% | 56,579 psi | 85% | 3005 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 98% | 57,783 psi | 87% | 3068 fps | 98.6% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 58,914 psi | 88% | 3130 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 59,901 psi | 90% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 58,189 psi | 87% | 2992 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,522 psi | 86% | 3058 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,188 psi | 86% | 2943 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% | 40,016 psi | 60% | 2631 fps | 99.1% |
| Accurate 4350 | <<locked>> | 80% | 52,895 psi | 79% | 2881 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 44,483 psi | 67% | 2808 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 44,092 psi | 66% | 2762 fps | 98% |
| ADI AR 2213 | <<locked>> | 80% | 39,334 psi | 59% | 2690 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 88% | 38,537 psi | 58% | 2667 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 84% | 30,589 psi | 46% | 2500 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,618 psi | 76% | 2887 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,990 psi | 66% | 2756 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,914 psi | 60% | 2700 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,725 psi | 58% | 2657 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,475 psi | 50% | 2575 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,497 psi | 65% | 2812 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 48,051 psi | 72% | 2917 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 49,966 psi | 75% | 2844 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 37,188 psi | 56% | 2635 fps | 96% |
| Bofors RP30 | <<locked>> | 86% | 38,203 psi | 57% | 2680 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 39,914 psi | 60% | 2700 fps | 97.1% |
| Bofors RP7 | <<locked>> | 80% | 54,389 psi | 82% | 2881 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 36,579 psi | 55% | 2621 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 54,230 psi | 81% | 2933 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 56,391 psi | 85% | 2946 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 42,018 psi | 63% | 2700 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,176 psi | 62% | 2680 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,514 psi | 71% | 2759 fps | 100% |
| Hodgdon Retumbo | 68.4 gr | 82% | 34,867 psi | 52% | 2661 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 54,897 psi | 82% | 2963 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 42% | 1706 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,792 psi | 75% | 2815 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 55,608 psi | 83% | 2904 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 50,053 psi | 75% | 2822 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,352 psi | 65% | 2697 fps | 96.3% |
| IMR 7828 SSC | <<locked>> | 80% | 38,087 psi | 57% | 2671 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 94% | 38,986 psi | 58% | 2717 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 53,330 psi | 80% | 2851 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,750 psi | 78% | 2848 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 34,447 psi | 52% | 2507 fps | 97.7% |
| Norma 204 | <<locked>> | 80% | 50,430 psi | 76% | 2861 fps | 99.1% |
| Norma 217 | <<locked>> | 88% | 31,894 psi | 48% | 2556 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 42,279 psi | 63% | 2772 fps | 98.8% |
| Norma URP | <<locked>> | 80% | 51,459 psi | 77% | 2864 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,826 psi | 57% | 2674 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 50,444 psi | 76% | 2864 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,997 psi | 51% | 2552 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,761 psi | 43% | 1745 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,127 psi | 80% | 2904 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,416 psi | 77% | 2923 fps | 100% |
| ReloadSwiss RS 76 | 71.5 gr | 80% | 31,850 psi | 48% | 2566 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 42,003 psi | 63% | 2789 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 45,049 psi | 68% | 2740 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 80% | 43,453 psi | 65% | 2743 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 80% | 54,389 psi | 82% | 2881 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,330 psi | 80% | 2851 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,750 psi | 78% | 2848 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,243 psi | 78% | 2802 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,120 psi | 65% | 2740 fps | 98% |
| Somchem S361 | <<locked>> | 80% | 45,890 psi | 69% | 2723 fps | 96.9% |
| Somchem S365 | <<locked>> | 80% | 49,066 psi | 74% | 2818 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,947 psi | 66% | 2723 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 80% | 56,652 psi | 85% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 52,852 psi | 79% | 2858 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,290 psi | 57% | 2595 fps | 97.2% |
| Vihtavuori N170 | <<locked>> | 96% | 56,347 psi | 84% | 2940 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 52,301 psi | 78% | 2861 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,091 psi | 65% | 2733 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,119 psi | 63% | 2762 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 84% | 40,016 psi | 60% | 2697 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 90% | 43,352 psi | 65% | 2808 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 96% | 51,053 psi | 77% | 2992 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,330 psi | 78% | 2808 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 54,462 psi | 82% | 2936 fps | 100% |
| Winchester StaBALL HD | 68.6 gr | 80% | 35,984 psi | 54% | 2694 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,364 psi | 61% | 2644 fps | 97.2% |
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 73 powders for 7 mm STW loaded with the .284 | 150gr | Remington PSP Core-Lokt. Vihtavuori N570 delivers the highest muzzle velocity at 3,130 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,130 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 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 150.0 gr projectile in 0.284" calls for a 1:12.0 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, Winchester StaBALL HD rank at the top here: for 7 mm STW with the .284 | 150gr | Remington PSP Core-Lokt 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.