Load Specifications
Load data in caliber 7 mm STW with .284 | 150gr | Barnes X S bullet and 69 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.
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>> | 90% | 59,132 psi | 89% | 2936 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 59,466 psi | 89% | 2959 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 57,363 psi | 86% | 3031 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 88% | 59,379 psi | 89% | 3015 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 90% | 57,638 psi | 86% | 3025 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 59,901 psi | 90% | 3051 fps | 99.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,621 psi | 82% | 3018 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 59,669 psi | 89% | 3012 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 59,350 psi | 89% | 3002 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 59,016 psi | 88% | 3002 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 58,349 psi | 87% | 3025 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 60,002 psi | 90% | 2989 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 59,785 psi | 90% | 3054 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 57,159 psi | 86% | 3028 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 58,160 psi | 87% | 3084 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,117 psi | 87% | 2976 fps | 97.5% |
| Bofors RP15 | <<locked>> | 92% | 57,551 psi | 86% | 3012 fps | 99.8% |
| Bofors RP30 | <<locked>> | 98% | 60,060 psi | 90% | 3071 fps | 99.8% |
| Bofors RP5 | <<locked>> | 90% | 58,349 psi | 87% | 3025 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 59,915 psi | 90% | 2949 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,580 psi | 86% | 3018 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 59,930 psi | 90% | 3005 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 57,014 psi | 85% | 2956 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 90% | 59,770 psi | 90% | 2999 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 60,017 psi | 90% | 2927 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 58,798 psi | 88% | 3143 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,710 psi | 57% | 1896 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 58,233 psi | 87% | 2936 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 59,292 psi | 89% | 2943 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,508 psi | 86% | 2936 fps | 99% |
| IMR 7828 SSC | <<locked>> | 92% | 59,683 psi | 89% | 3064 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,415 psi | 76% | 2933 fps | 98.8% |
| Lovex S065 | <<locked>> | 82% | 58,871 psi | 88% | 2917 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 57,377 psi | 86% | 2920 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 57,087 psi | 86% | 2910 fps | 100% |
| Norma 204 | <<locked>> | 84% | 59,408 psi | 89% | 2992 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 51,430 psi | 77% | 2966 fps | 99.9% |
| Norma MRP | <<locked>> | 88% | 58,537 psi | 88% | 3045 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,014 psi | 85% | 2936 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,971 psi | 85% | 3028 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 59,422 psi | 89% | 2992 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 60,075 psi | 90% | 3018 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,827 psi | 58% | 1942 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 59,277 psi | 89% | 2979 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,203 psi | 86% | 2999 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 60,089 psi | 90% | 3133 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 59,727 psi | 90% | 3094 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 88% | 60,118 psi | 90% | 2982 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 88% | 58,842 psi | 88% | 2995 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 59,915 psi | 90% | 2949 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 58,871 psi | 88% | 2917 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 57,377 psi | 86% | 2920 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,696 psi | 86% | 2867 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 58,421 psi | 88% | 2992 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 58,088 psi | 87% | 2917 fps | 99% |
| Somchem S365 | <<locked>> | 84% | 58,479 psi | 88% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 59,466 psi | 89% | 2966 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 58,407 psi | 88% | 2923 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 59,132 psi | 89% | 2946 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 57,783 psi | 87% | 2927 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 58,842 psi | 88% | 2972 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,856 psi | 87% | 3038 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 94% | 58,972 psi | 88% | 3031 fps | 99.4% |
| Vihtavuori N568 | <<locked>> | 98% | 60,118 psi | 90% | 3094 fps | 98.9% |
| Vihtavuori N570 | <<locked>> | 98% | 56,985 psi | 85% | 3087 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,841 psi | 87% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 60,162 psi | 90% | 3009 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 59,741 psi | 90% | 3081 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 59,321 psi | 89% | 2963 fps | 99.9% |
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% | 43,134 psi | 65% | 2677 fps | 99.5% |
| Accurate 4350 | <<locked>> | 80% | 55,796 psi | 84% | 2910 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 43,801 psi | 66% | 2785 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 45,861 psi | 69% | 2785 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 80% | 41,437 psi | 62% | 2723 fps | 96.1% |
| ADI AR 2217 | <<locked>> | 86% | 38,130 psi | 57% | 2641 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 82% | 31,140 psi | 47% | 2503 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,427 psi | 70% | 2789 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,402 psi | 79% | 2904 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,021 psi | 69% | 2782 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,337 psi | 63% | 2740 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,162 psi | 62% | 2694 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,723 psi | 54% | 2621 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,021 psi | 69% | 2851 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 50,401 psi | 76% | 2953 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 48,399 psi | 73% | 2802 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 39,552 psi | 59% | 2677 fps | 96.8% |
| Bofors RP30 | <<locked>> | 84% | 38,159 psi | 57% | 2667 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 42,337 psi | 63% | 2740 fps | 97.7% |
| Bofors RP7 | <<locked>> | 80% | 56,391 psi | 85% | 2897 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 82% | 36,419 psi | 55% | 2602 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 56,362 psi | 84% | 2953 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 43,990 psi | 66% | 2726 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,279 psi | 65% | 2710 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,835 psi | 75% | 2782 fps | 100% |
| Hodgdon Retumbo | 65.2 gr | 80% | 34,940 psi | 52% | 2648 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,500 psi | 43% | 1703 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,430 psi | 77% | 2828 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 52,475 psi | 79% | 2844 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,049 psi | 68% | 2717 fps | 96.7% |
| IMR 7828 SSC | <<locked>> | 80% | 40,263 psi | 60% | 2707 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 92% | 39,117 psi | 59% | 2710 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 55,477 psi | 83% | 2867 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 53,998 psi | 81% | 2867 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 37,652 psi | 56% | 2562 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 52,286 psi | 78% | 2881 fps | 99.2% |
| Norma 217 | <<locked>> | 86% | 32,692 psi | 49% | 2566 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 44,701 psi | 67% | 2812 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 53,606 psi | 80% | 2884 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 40,103 psi | 60% | 2717 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 80% | 52,431 psi | 79% | 2884 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,550 psi | 55% | 2605 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,225 psi | 44% | 1742 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 55,550 psi | 83% | 2923 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,461 psi | 80% | 2946 fps | 100% |
| ReloadSwiss RS 76 | 69.8 gr | 80% | 34,301 psi | 51% | 2625 fps | 97% |
| ReloadSwiss RS 80 | 77.4 gr | 88% | 41,626 psi | 62% | 2772 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 47,021 psi | 70% | 2762 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 80% | 45,730 psi | 69% | 2776 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 80% | 56,391 psi | 85% | 2897 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 55,477 psi | 83% | 2867 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 53,998 psi | 81% | 2867 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 54,244 psi | 81% | 2818 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,440 psi | 68% | 2769 fps | 98.4% |
| Somchem S361 | <<locked>> | 80% | 47,964 psi | 72% | 2749 fps | 97.3% |
| Somchem S365 | <<locked>> | 80% | 51,343 psi | 77% | 2841 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,456 psi | 70% | 2756 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 80% | 54,926 psi | 82% | 2874 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 40,596 psi | 61% | 2631 fps | 97.8% |
| Vihtavuori N550 | <<locked>> | 80% | 54,418 psi | 82% | 2881 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 45,919 psi | 69% | 2772 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,338 psi | 66% | 2795 fps | 96.5% |
| Vihtavuori N565 | <<locked>> | 82% | 40,118 psi | 60% | 2687 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 90% | 45,788 psi | 69% | 2848 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 96% | 53,113 psi | 80% | 3022 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,998 psi | 81% | 2818 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 56,362 psi | 84% | 2953 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,711 psi | 58% | 2749 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,714 psi | 64% | 2680 fps | 97.7% |
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 69 powders for 7 mm STW loaded with the .284 | 150gr | Barnes X S. Hodgdon Retumbo delivers the highest muzzle velocity at 3,143 fps; across all powders the maximum-charge window runs from 1,896 fps to 3,143 fps. ADI AR 2217 gives the best case fill at 100 %, and 69 of the 69 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 150.0 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 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, ReloadSwiss RS 80 rank at the top here: for 7 mm STW with the .284 | 150gr | Barnes X S 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.