Load Specifications
Load data in caliber 7 mm STW with .284 | 140gr | Barnes X BT 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>> | 90% | 56,797 psi | 85% | 2989 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,101 psi | 86% | 3018 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 58,566 psi | 88% | 3133 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 88% | 57,159 psi | 86% | 3064 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 92% | 58,885 psi | 88% | 3127 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 57,377 psi | 86% | 3091 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,141 psi | 78% | 3058 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 57,290 psi | 86% | 3058 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,188 psi | 86% | 3064 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,652 psi | 85% | 3051 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 59,509 psi | 89% | 3130 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 57,493 psi | 86% | 3045 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 57,159 psi | 86% | 3107 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 58,291 psi | 87% | 3136 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 55,172 psi | 83% | 3114 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 59,654 psi | 89% | 3074 fps | 97.1% |
| Bofors RP15 | <<locked>> | 94% | 58,682 psi | 88% | 3114 fps | 99.7% |
| Bofors RP30 | <<locked>> | 98% | 57,217 psi | 86% | 3114 fps | 99.3% |
| Bofors RP5 | <<locked>> | 92% | 59,509 psi | 89% | 3130 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 57,986 psi | 87% | 3005 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 58,958 psi | 88% | 3120 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 82% | 57,885 psi | 87% | 3064 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 59,857 psi | 90% | 3071 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 90% | 58,653 psi | 88% | 3064 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 57,508 psi | 86% | 3045 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,624 psi | 86% | 2986 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 59,843 psi | 90% | 3245 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 58,523 psi | 88% | 3094 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,521 psi | 56% | 1959 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 59,654 psi | 89% | 3041 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 58,755 psi | 88% | 3022 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,014 psi | 85% | 3002 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 59,074 psi | 89% | 3041 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 92% | 57,058 psi | 86% | 3107 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,022 psi | 72% | 2972 fps | 97.8% |
| Lovex S065 | <<locked>> | 84% | 60,365 psi | 90% | 3028 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 58,784 psi | 88% | 3028 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 58,102 psi | 87% | 3009 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,348 psi | 86% | 3045 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 48,573 psi | 73% | 3002 fps | 99.5% |
| Norma MRP | <<locked>> | 90% | 59,886 psi | 90% | 3153 fps | 100% |
| Norma URP | <<locked>> | 84% | 58,363 psi | 87% | 3045 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 58,233 psi | 87% | 3130 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 84% | 57,276 psi | 86% | 3048 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 57,145 psi | 86% | 3064 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,609 psi | 58% | 2005 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,043 psi | 86% | 3035 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 58,929 psi | 88% | 3114 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 57,101 psi | 86% | 3176 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 56,666 psi | 85% | 3130 fps | 98.3% |
| Rottweil R 904 | <<locked>> | 88% | 57,899 psi | 87% | 3028 fps | 99% |
| Rottweil R 905 | <<locked>> | 90% | 60,278 psi | 90% | 3104 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 57,986 psi | 87% | 3005 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 60,365 psi | 90% | 3028 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 58,784 psi | 88% | 3028 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 59,466 psi | 89% | 2976 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 59,843 psi | 90% | 3097 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 59,727 psi | 90% | 3018 fps | 98.8% |
| Somchem S365 | <<locked>> | 86% | 59,669 psi | 89% | 3048 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,261 psi | 86% | 3018 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 60,350 psi | 90% | 2963 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 60,046 psi | 90% | 3031 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 56,840 psi | 85% | 2995 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 84% | 59,495 psi | 89% | 3041 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 59,886 psi | 90% | 3077 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 59,205 psi | 89% | 3146 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 96% | 60,162 psi | 90% | 3133 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 98% | 57,058 psi | 86% | 3130 fps | 97.9% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 58,073 psi | 87% | 3186 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 59,451 psi | 89% | 2979 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 58,059 psi | 87% | 3064 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 56,608 psi | 85% | 3136 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,000 psi | 85% | 3009 fps | 99.5% |
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% | 41,292 psi | 62% | 2720 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 53,606 psi | 80% | 2963 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 44,759 psi | 67% | 2881 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 44,179 psi | 66% | 2831 fps | 97.4% |
| ADI AR 2213 | <<locked>> | 82% | 42,467 psi | 64% | 2822 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 90% | 41,495 psi | 62% | 2792 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 86% | 33,605 psi | 50% | 2641 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 44,585 psi | 67% | 2831 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,328 psi | 75% | 2959 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,222 psi | 66% | 2825 fps | 97.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,437 psi | 61% | 2776 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,262 psi | 59% | 2736 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,301 psi | 51% | 2657 fps | 97.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,772 psi | 66% | 2894 fps | 99.9% |
| Alliant Reloder-33 | <<locked>> | 98% | 51,285 psi | 77% | 3045 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 52,924 psi | 79% | 2959 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 37,826 psi | 57% | 2713 fps | 95.4% |
| Bofors RP30 | <<locked>> | 86% | 38,740 psi | 58% | 2756 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 40,437 psi | 61% | 2776 fps | 96.5% |
| Bofors RP7 | <<locked>> | 80% | 54,534 psi | 82% | 2949 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 86% | 39,653 psi | 59% | 2753 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 54,215 psi | 81% | 3002 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 56,130 psi | 84% | 3012 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 82% | 45,092 psi | 68% | 2825 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 82% | 44,411 psi | 67% | 2808 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,877 psi | 72% | 2838 fps | 100% |
| Hodgdon Retumbo | 67.4 gr | 82% | 35,607 psi | 53% | 2736 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 54,563 psi | 82% | 3031 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,253 psi | 42% | 1755 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,821 psi | 75% | 2881 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 55,390 psi | 83% | 2969 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 50,488 psi | 76% | 2900 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,613 psi | 65% | 2762 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 82% | 41,075 psi | 62% | 2802 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 94% | 39,566 psi | 59% | 2792 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 53,650 psi | 80% | 2927 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,185 psi | 78% | 2923 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 36,056 psi | 54% | 2602 fps | 97.6% |
| Norma 204 | <<locked>> | 80% | 50,270 psi | 75% | 2927 fps | 98.5% |
| Norma 217 | <<locked>> | 90% | 35,215 psi | 53% | 2707 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 42,714 psi | 64% | 2851 fps | 98.4% |
| Norma URP | <<locked>> | 80% | 51,619 psi | 77% | 2940 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 41,104 psi | 62% | 2812 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 50,372 psi | 76% | 2933 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 34,766 psi | 52% | 2631 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,095 psi | 44% | 1801 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,229 psi | 80% | 2976 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,227 psi | 77% | 2995 fps | 100% |
| ReloadSwiss RS 76 | 70.4 gr | 80% | 32,822 psi | 49% | 2644 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 45,571 psi | 68% | 2933 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 45,281 psi | 68% | 2805 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 80% | 43,874 psi | 66% | 2815 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 80% | 54,534 psi | 82% | 2949 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,650 psi | 80% | 2927 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,185 psi | 78% | 2923 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,649 psi | 79% | 2874 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,526 psi | 65% | 2812 fps | 97.4% |
| Somchem S361 | <<locked>> | 80% | 46,354 psi | 69% | 2792 fps | 96.2% |
| Somchem S365 | <<locked>> | 80% | 49,298 psi | 74% | 2897 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,628 psi | 67% | 2799 fps | 98.4% |
| Vihtavuori N150 | <<locked>> | 80% | 56,826 psi | 85% | 2917 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 52,910 psi | 79% | 2930 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,928 psi | 58% | 2667 fps | 96.6% |
| Vihtavuori N550 | <<locked>> | 80% | 52,388 psi | 79% | 2933 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,961 psi | 66% | 2818 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,496 psi | 64% | 2835 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 86% | 43,526 psi | 65% | 2838 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 92% | 46,572 psi | 70% | 2940 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 98% | 54,143 psi | 81% | 3120 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,127 psi | 78% | 2877 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 54,462 psi | 82% | 3009 fps | 99.9% |
| Winchester StaBALL HD | 67.5 gr | 80% | 36,260 psi | 54% | 2782 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,901 psi | 61% | 2717 fps | 96.6% |
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 73 powders for 7 mm STW loaded with the .284 | 140gr | Barnes X BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,245 fps; across all powders the maximum-charge window runs from 1,959 fps to 3,245 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 140.0 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, Winchester StaBALL HD rank at the top here: for 7 mm STW with the .284 | 140gr | Barnes X BT 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.