Load Specifications
Load data in caliber 7 mm STW with .284 | 150gr | Nosler SP SolBase 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 IMR 7828 SSC.
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% | 60,350 psi | 90% | 2969 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,956 psi | 85% | 2943 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 59,176 psi | 89% | 3071 fps | 99% |
| ADI AR 2209 | <<locked>> | 88% | 57,899 psi | 87% | 3005 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 60,031 psi | 90% | 3074 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 58,247 psi | 87% | 3038 fps | 99.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,808 psi | 79% | 2999 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,885 psi | 87% | 2995 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,435 psi | 86% | 2992 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 60,292 psi | 90% | 3064 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 57,972 psi | 87% | 2972 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 58,175 psi | 87% | 3041 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 59,205 psi | 89% | 3064 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,130 psi | 84% | 3058 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 56,811 psi | 85% | 2966 fps | 97.4% |
| Bofors RP15 | <<locked>> | 94% | 59,408 psi | 89% | 3051 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 57,957 psi | 87% | 3051 fps | 99.7% |
| Bofors RP5 | <<locked>> | 92% | 60,292 psi | 90% | 3064 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 58,059 psi | 87% | 2936 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 60,220 psi | 90% | 3064 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 58,131 psi | 87% | 2992 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 59,277 psi | 89% | 3005 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,088 psi | 87% | 2986 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 58,160 psi | 87% | 2917 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,116 psi | 86% | 3123 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 59,393 psi | 89% | 3031 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,550 psi | 56% | 1906 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 60,263 psi | 90% | 2979 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 59,277 psi | 89% | 2956 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,203 psi | 86% | 2930 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 59,640 psi | 89% | 2982 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 92% | 58,102 psi | 87% | 3051 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,196 psi | 72% | 2904 fps | 98.5% |
| Lovex S065 | <<locked>> | 82% | 56,869 psi | 85% | 2907 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 58,900 psi | 88% | 2956 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,957 psi | 87% | 2936 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,914 psi | 87% | 2986 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 49,037 psi | 74% | 2933 fps | 99.8% |
| Norma MRP | <<locked>> | 88% | 56,362 psi | 84% | 3025 fps | 100% |
| Norma URP | <<locked>> | 84% | 58,827 psi | 88% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 59,683 psi | 89% | 3077 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 57,740 psi | 87% | 2982 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 58,059 psi | 87% | 3005 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,392 psi | 58% | 1952 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,043 psi | 86% | 2959 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 59,785 psi | 90% | 3048 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 58,247 psi | 87% | 3117 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 57,638 psi | 86% | 3071 fps | 99% |
| Rottweil R 904 | <<locked>> | 88% | 58,450 psi | 88% | 2972 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 88% | 57,014 psi | 85% | 2982 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 58,059 psi | 87% | 2936 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,869 psi | 85% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 58,900 psi | 88% | 2956 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 59,625 psi | 89% | 2913 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,652 psi | 85% | 2979 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 60,220 psi | 90% | 2959 fps | 99.3% |
| Somchem S365 | <<locked>> | 86% | 60,147 psi | 90% | 2976 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,580 psi | 86% | 2953 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,666 psi | 85% | 2913 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,348 psi | 86% | 2936 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 59,553 psi | 89% | 2966 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 60,147 psi | 90% | 3002 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 60,060 psi | 90% | 3087 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 94% | 56,724 psi | 85% | 3009 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 98% | 58,146 psi | 87% | 3074 fps | 98.7% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 59,350 psi | 89% | 3136 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 60,060 psi | 90% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 58,363 psi | 87% | 2995 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,725 psi | 87% | 3061 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,377 psi | 86% | 2946 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% | 40,176 psi | 60% | 2638 fps | 99.1% |
| Accurate 4350 | <<locked>> | 80% | 53,113 psi | 80% | 2884 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 44,628 psi | 67% | 2815 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 44,063 psi | 66% | 2762 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 80% | 39,465 psi | 59% | 2694 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 88% | 38,653 psi | 58% | 2671 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 84% | 30,705 psi | 46% | 2503 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,778 psi | 76% | 2890 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,106 psi | 66% | 2759 fps | 98.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,074 psi | 60% | 2703 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,754 psi | 58% | 2657 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,460 psi | 50% | 2575 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,671 psi | 65% | 2815 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 48,196 psi | 72% | 2920 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 50,067 psi | 75% | 2848 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 37,347 psi | 56% | 2641 fps | 96% |
| Bofors RP30 | <<locked>> | 86% | 38,348 psi | 57% | 2684 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 40,074 psi | 60% | 2703 fps | 97.1% |
| Bofors RP7 | <<locked>> | 80% | 54,578 psi | 82% | 2887 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 36,709 psi | 55% | 2625 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 54,418 psi | 82% | 2933 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 42,177 psi | 63% | 2703 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,321 psi | 62% | 2684 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,688 psi | 71% | 2762 fps | 100% |
| Hodgdon Retumbo | 68.6 gr | 82% | 34,998 psi | 52% | 2664 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 55,071 psi | 83% | 2966 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,021 psi | 42% | 1706 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,763 psi | 75% | 2815 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 55,796 psi | 84% | 2904 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 50,227 psi | 75% | 2825 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,323 psi | 65% | 2700 fps | 96.3% |
| IMR 7828 SSC | 66.9 gr | 80% | 38,203 psi | 57% | 2674 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 94% | 39,305 psi | 59% | 2723 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 53,287 psi | 80% | 2851 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,895 psi | 78% | 2851 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 34,592 psi | 52% | 2510 fps | 97.8% |
| Norma 204 | <<locked>> | 80% | 50,589 psi | 76% | 2864 fps | 99.1% |
| Norma 217 | <<locked>> | 88% | 32,024 psi | 48% | 2559 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 42,453 psi | 64% | 2776 fps | 98.9% |
| Norma URP | <<locked>> | 80% | 51,605 psi | 77% | 2867 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,985 psi | 57% | 2677 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 50,618 psi | 76% | 2867 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,127 psi | 51% | 2559 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,834 psi | 43% | 1749 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,301 psi | 80% | 2904 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,590 psi | 77% | 2927 fps | 100% |
| ReloadSwiss RS 76 | 71.7 gr | 80% | 31,966 psi | 48% | 2569 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 42,337 psi | 63% | 2795 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 45,223 psi | 68% | 2743 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 80% | 43,627 psi | 65% | 2746 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 80% | 54,578 psi | 82% | 2887 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,287 psi | 80% | 2851 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,895 psi | 78% | 2851 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,257 psi | 78% | 2802 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,294 psi | 65% | 2743 fps | 98% |
| Somchem S361 | <<locked>> | 80% | 46,021 psi | 69% | 2726 fps | 96.9% |
| Somchem S365 | <<locked>> | 80% | 49,037 psi | 74% | 2818 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,106 psi | 66% | 2726 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 80% | 52,997 psi | 79% | 2858 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,450 psi | 58% | 2598 fps | 97.2% |
| Vihtavuori N550 | <<locked>> | 80% | 52,243 psi | 78% | 2861 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,265 psi | 65% | 2736 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,279 psi | 63% | 2766 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 84% | 40,161 psi | 60% | 2700 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 90% | 43,497 psi | 65% | 2812 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 96% | 51,198 psi | 77% | 2999 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,475 psi | 79% | 2812 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 54,607 psi | 82% | 2936 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,187 psi | 54% | 2697 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,509 psi | 61% | 2651 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 70 powders for 7 mm STW loaded with the .284 | 150gr | Nosler SP SolBase. Vihtavuori N570 delivers the highest muzzle velocity at 3,136 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,136 fps. ADI AR 2217 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 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, IMR 7828 SSC rank at the top here: for 7 mm STW with the .284 | 150gr | Nosler SP SolBase 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.