Load Specifications
Load data in caliber 7 mm STW with .284 | 139gr | Reichenberg HDB Universal bullet and 74 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% | 56,884 psi | 85% | 3015 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,392 psi | 86% | 3045 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 59,712 psi | 90% | 3169 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 90% | 58,421 psi | 88% | 3107 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 92% | 56,463 psi | 85% | 3110 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,607 psi | 82% | 3068 fps | 98.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,284 psi | 74% | 3025 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 58,552 psi | 88% | 3100 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 58,291 psi | 87% | 3100 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 59,712 psi | 90% | 3114 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,856 psi | 87% | 3091 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,710 psi | 85% | 3104 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 58,102 psi | 87% | 3074 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 58,030 psi | 87% | 3136 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 59,234 psi | 89% | 3166 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,783 psi | 87% | 3064 fps | 96.8% |
| Bofors RP15 | <<locked>> | 96% | 59,582 psi | 89% | 3146 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,856 psi | 87% | 3143 fps | 99.4% |
| Bofors RP5 | <<locked>> | 92% | 56,710 psi | 85% | 3104 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 58,914 psi | 88% | 3045 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 56,202 psi | 84% | 3094 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 84% | 58,871 psi | 88% | 3097 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,435 psi | 86% | 3054 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 60,031 psi | 90% | 3107 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 58,798 psi | 88% | 3087 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 58,711 psi | 88% | 3022 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,884 psi | 85% | 3215 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 60,162 psi | 90% | 3136 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,304 psi | 56% | 1972 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,363 psi | 86% | 3028 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,840 psi | 85% | 3015 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 57,682 psi | 86% | 3035 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,724 psi | 85% | 3025 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 94% | 58,523 psi | 88% | 3150 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,657 psi | 67% | 2923 fps | 96.9% |
| Lovex S065 | <<locked>> | 84% | 57,638 psi | 86% | 3012 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 59,596 psi | 89% | 3061 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 58,001 psi | 87% | 3028 fps | 100% |
| Norma 204 | <<locked>> | 86% | 58,711 psi | 88% | 3087 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 44,976 psi | 67% | 2949 fps | 98.9% |
| Norma MRP | <<locked>> | 90% | 56,855 psi | 85% | 3127 fps | 100% |
| Norma URP | <<locked>> | 86% | 59,350 psi | 89% | 3081 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 59,640 psi | 89% | 3173 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 58,378 psi | 88% | 3087 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 58,320 psi | 87% | 3100 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,101 psi | 57% | 2014 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,740 psi | 87% | 3068 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 60,263 psi | 90% | 3153 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 58,088 psi | 87% | 3212 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 57,522 psi | 86% | 3159 fps | 98.5% |
| Rottweil R 904 | <<locked>> | 90% | 59,350 psi | 89% | 3074 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 90% | 57,406 psi | 86% | 3081 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 58,914 psi | 88% | 3045 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,638 psi | 86% | 3012 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 59,596 psi | 89% | 3061 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 59,785 psi | 90% | 2904 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,884 psi | 85% | 2963 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,971 psi | 85% | 3077 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 60,104 psi | 90% | 3035 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 57,203 psi | 86% | 3002 fps | 98.4% |
| Somchem S365 | <<locked>> | 86% | 56,594 psi | 85% | 3028 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,957 psi | 87% | 3048 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 57,624 psi | 86% | 2949 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,276 psi | 86% | 3018 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,740 psi | 87% | 3031 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 60,307 psi | 90% | 3074 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 60,336 psi | 90% | 3104 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,478 psi | 85% | 3120 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 96% | 56,927 psi | 85% | 3104 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 58,175 psi | 87% | 3166 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,942 psi | 85% | 2966 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 59,088 psi | 89% | 3100 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 57,334 psi | 86% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 58,102 psi | 87% | 3048 fps | 99.6% |
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% | 37,623 psi | 56% | 2664 fps | 98% |
| Accurate 4350 | <<locked>> | 80% | 50,024 psi | 75% | 2930 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 44,715 psi | 67% | 2897 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 41,481 psi | 62% | 2795 fps | 96.6% |
| ADI AR 2213 | <<locked>> | 84% | 42,714 psi | 64% | 2848 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 92% | 41,423 psi | 62% | 2808 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 88% | 32,779 psi | 49% | 2635 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,989 psi | 63% | 2799 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,834 psi | 72% | 2936 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 55,709 psi | 84% | 3058 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,597 psi | 62% | 2792 fps | 96.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,507 psi | 56% | 2726 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,260 psi | 54% | 2694 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,299 psi | 47% | 2592 fps | 96.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,437 psi | 61% | 2841 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 50,923 psi | 76% | 2943 fps | 95.1% |
| Bofors RP15 | <<locked>> | 82% | 37,333 psi | 56% | 2720 fps | 95.1% |
| Bofors RP30 | <<locked>> | 90% | 40,915 psi | 61% | 2825 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 37,507 psi | 56% | 2726 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 51,996 psi | 78% | 2933 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 39,639 psi | 59% | 2772 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 51,474 psi | 77% | 2979 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 53,766 psi | 81% | 2995 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 84% | 45,498 psi | 68% | 2854 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 84% | 44,759 psi | 67% | 2838 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,962 psi | 67% | 2812 fps | 100% |
| Hodgdon Retumbo | 71.8 gr | 86% | 37,594 psi | 56% | 2812 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 51,808 psi | 78% | 3005 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,949 psi | 42% | 1768 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,253 psi | 71% | 2858 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,258 psi | 80% | 2956 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 47,427 psi | 71% | 2871 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 43,961 psi | 66% | 2792 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 84% | 41,118 psi | 62% | 2822 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 98% | 41,669 psi | 62% | 2858 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 50,952 psi | 76% | 2904 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,327 psi | 74% | 2894 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 32,358 psi | 49% | 2533 fps | 96.1% |
| Norma 204 | <<locked>> | 80% | 47,848 psi | 72% | 2904 fps | 98.1% |
| Norma 217 | <<locked>> | 92% | 34,026 psi | 51% | 2690 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 39,581 psi | 59% | 2799 fps | 97.5% |
| Norma URP | <<locked>> | 80% | 48,820 psi | 73% | 2917 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 41,176 psi | 62% | 2835 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 47,790 psi | 72% | 2910 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 34,142 psi | 51% | 2635 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,543 psi | 43% | 1808 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,198 psi | 75% | 2949 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,356 psi | 72% | 2966 fps | 100% |
| ReloadSwiss RS 76 | 75 gr | 84% | 34,360 psi | 52% | 2713 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 45,440 psi | 68% | 2946 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 42,815 psi | 64% | 2776 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 80% | 41,017 psi | 61% | 2776 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 80% | 51,996 psi | 78% | 2933 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,952 psi | 76% | 2904 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,327 psi | 74% | 2894 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 56,101 psi | 84% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,763 psi | 75% | 2848 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,683 psi | 61% | 2772 fps | 96.5% |
| Somchem S355 | <<locked>> | 80% | 56,492 psi | 85% | 2986 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 43,642 psi | 65% | 2759 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 46,021 psi | 69% | 2864 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,568 psi | 62% | 2759 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 80% | 54,114 psi | 81% | 2904 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,212 psi | 75% | 2907 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,114 psi | 54% | 2625 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 49,501 psi | 74% | 2907 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,509 psi | 61% | 2772 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 82% | 42,424 psi | 64% | 2851 fps | 95% |
| Vihtavuori N565 | <<locked>> | 88% | 43,047 psi | 65% | 2844 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 94% | 46,543 psi | 70% | 2959 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,676 psi | 74% | 2861 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,692 psi | 77% | 2982 fps | 99.7% |
| Winchester StaBALL HD | 68.6 gr | 80% | 32,909 psi | 49% | 2717 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,101 psi | 57% | 2677 fps | 95.6% |
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 74 powders for 7 mm STW loaded with the .284 | 139gr | Reichenberg HDB Universal. Hodgdon Retumbo delivers the highest muzzle velocity at 3,215 fps; across all powders the maximum-charge window runs from 1,972 fps to 3,215 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 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 139.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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 | 139gr | Reichenberg HDB Universal 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.