Load Specifications
Load data in caliber 7 mm STW with .284 | 140gr | Alaska Bullet Works Kodiak SP SPBC bullet and 72 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 Vihtavuori N560.
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% | 57,522 psi | 86% | 3012 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 58,131 psi | 87% | 3045 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 56,449 psi | 85% | 3110 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 90% | 59,059 psi | 89% | 3104 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 57,363 psi | 86% | 3114 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,463 psi | 83% | 3071 fps | 99.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 50,082 psi | 75% | 3031 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 59,219 psi | 89% | 3100 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 59,045 psi | 89% | 3100 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 58,508 psi | 88% | 3091 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,638 psi | 86% | 3107 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 59,059 psi | 89% | 3074 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 59,016 psi | 88% | 3143 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 60,307 psi | 90% | 3169 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 58,450 psi | 88% | 3068 fps | 97.1% |
| Bofors RP15 | <<locked>> | 94% | 56,550 psi | 85% | 3091 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 58,813 psi | 88% | 3146 fps | 99.5% |
| Bofors RP5 | <<locked>> | 92% | 57,638 psi | 86% | 3107 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 59,553 psi | 89% | 3045 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 57,087 psi | 86% | 3100 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 84% | 59,785 psi | 90% | 3100 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 58,102 psi | 87% | 3058 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 90% | 56,884 psi | 85% | 3048 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 59,683 psi | 89% | 3091 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 59,422 psi | 89% | 3022 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,885 psi | 87% | 3222 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,666 psi | 85% | 3074 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,347 psi | 56% | 1969 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,972 psi | 87% | 3028 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,246 psi | 86% | 3009 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 58,349 psi | 87% | 3035 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,319 psi | 86% | 3028 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 94% | 59,234 psi | 89% | 3153 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,455 psi | 68% | 2927 fps | 97.2% |
| Lovex S065 | <<locked>> | 84% | 58,233 psi | 87% | 3009 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 60,263 psi | 90% | 3061 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 58,958 psi | 88% | 3031 fps | 100% |
| Norma 204 | <<locked>> | 86% | 59,379 psi | 89% | 3087 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 45,890 psi | 69% | 2953 fps | 99.1% |
| Norma MRP | <<locked>> | 90% | 57,595 psi | 86% | 3127 fps | 100% |
| Norma URP | <<locked>> | 86% | 60,075 psi | 90% | 3081 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,289 psi | 84% | 3110 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 59,045 psi | 89% | 3084 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 59,277 psi | 89% | 3104 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,145 psi | 57% | 2011 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 58,465 psi | 88% | 3068 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,913 psi | 85% | 3094 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 59,364 psi | 89% | 3219 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 58,682 psi | 88% | 3169 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 90% | 59,988 psi | 90% | 3074 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 90% | 58,363 psi | 87% | 3084 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 59,553 psi | 89% | 3045 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 58,233 psi | 87% | 3009 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 60,263 psi | 90% | 3061 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 60,162 psi | 90% | 2897 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,464 psi | 86% | 2963 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 57,928 psi | 87% | 3081 fps | 99.7% |
| Somchem S361 | <<locked>> | 88% | 57,972 psi | 87% | 3005 fps | 98.6% |
| Somchem S365 | <<locked>> | 86% | 57,392 psi | 86% | 3028 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 58,856 psi | 88% | 3054 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 58,291 psi | 87% | 2949 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,957 psi | 87% | 3015 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 58,581 psi | 88% | 3035 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 57,363 psi | 86% | 3022 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,363 psi | 86% | 3051 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,145 psi | 86% | 3123 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 96% | 57,595 psi | 86% | 3104 fps | 98.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 59,074 psi | 89% | 3169 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,783 psi | 87% | 2966 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 59,785 psi | 90% | 3100 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 58,508 psi | 88% | 3163 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 58,943 psi | 88% | 3051 fps | 99.7% |
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% | 38,232 psi | 57% | 2667 fps | 98.2% |
| Accurate 4350 | <<locked>> | 80% | 50,763 psi | 76% | 2933 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 45,527 psi | 68% | 2907 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 42,076 psi | 63% | 2799 fps | 96.9% |
| ADI AR 2213 | <<locked>> | 84% | 43,323 psi | 65% | 2854 fps | 96% |
| ADI AR 2217 | <<locked>> | 92% | 42,119 psi | 63% | 2818 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 88% | 33,373 psi | 50% | 2648 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,583 psi | 64% | 2802 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,312 psi | 72% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,192 psi | 63% | 2795 fps | 97% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,072 psi | 57% | 2730 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,709 psi | 55% | 2694 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,792 psi | 48% | 2598 fps | 96.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,104 psi | 62% | 2844 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 51,372 psi | 77% | 2943 fps | 95.3% |
| Bofors RP15 | <<locked>> | 82% | 37,913 psi | 57% | 2726 fps | 95.4% |
| Bofors RP30 | <<locked>> | 88% | 38,856 psi | 58% | 2769 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 38,072 psi | 57% | 2730 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 52,417 psi | 79% | 2933 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 40,176 psi | 60% | 2776 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 52,141 psi | 78% | 2979 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 54,389 psi | 82% | 2999 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 82% | 43,004 psi | 64% | 2792 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 84% | 45,324 psi | 68% | 2841 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,629 psi | 68% | 2812 fps | 100% |
| Hodgdon Retumbo | 70.6 gr | 84% | 35,578 psi | 53% | 2749 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 52,678 psi | 79% | 3012 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,876 psi | 42% | 1762 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,848 psi | 72% | 2861 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,853 psi | 81% | 2956 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 47,877 psi | 72% | 2871 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,640 psi | 62% | 2736 fps | 95% |
| IMR 7828 SSC | <<locked>> | 84% | 41,698 psi | 63% | 2828 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 96% | 39,537 psi | 59% | 2802 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 51,358 psi | 77% | 2904 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,922 psi | 75% | 2897 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 32,764 psi | 49% | 2536 fps | 96.4% |
| Norma 204 | <<locked>> | 80% | 48,472 psi | 73% | 2907 fps | 98.3% |
| Norma 217 | <<locked>> | 92% | 34,577 psi | 52% | 2697 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 40,205 psi | 60% | 2805 fps | 97.8% |
| Norma URP | <<locked>> | 80% | 49,458 psi | 74% | 2917 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 41,785 psi | 63% | 2838 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 48,428 psi | 73% | 2913 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 34,838 psi | 52% | 2644 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,645 psi | 43% | 1804 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,879 psi | 76% | 2953 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,037 psi | 74% | 2969 fps | 100% |
| ReloadSwiss RS 76 | 73.8 gr | 82% | 32,547 psi | 49% | 2651 fps | 95% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 46,456 psi | 70% | 2953 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 43,207 psi | 65% | 2776 fps | 96.1% |
| Rottweil R 905 | <<locked>> | 80% | 41,626 psi | 62% | 2782 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 80% | 52,417 psi | 79% | 2933 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,358 psi | 77% | 2904 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,922 psi | 75% | 2897 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 56,536 psi | 85% | 2851 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,328 psi | 75% | 2851 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,292 psi | 62% | 2776 fps | 96.8% |
| Somchem S361 | <<locked>> | 80% | 44,135 psi | 66% | 2762 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 46,702 psi | 70% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,119 psi | 63% | 2762 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 80% | 54,766 psi | 82% | 2900 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,850 psi | 76% | 2907 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,637 psi | 55% | 2628 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 50,125 psi | 75% | 2907 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 41,162 psi | 62% | 2776 fps | 99.9% |
| Vihtavuori N560 | 71.5 gr | 82% | 43,062 psi | 65% | 2858 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 86% | 40,901 psi | 61% | 2789 fps | 95% |
| Vihtavuori N568 | <<locked>> | 94% | 47,398 psi | 71% | 2963 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,256 psi | 75% | 2861 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,315 psi | 78% | 2982 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,634 psi | 50% | 2720 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,638 psi | 58% | 2680 fps | 95.9% |
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 72 powders for 7 mm STW loaded with the .284 | 140gr | Alaska Bullet Works Kodiak SP SPBC. Hodgdon Retumbo delivers the highest muzzle velocity at 3,222 fps; across all powders the maximum-charge window runs from 1,969 fps to 3,222 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 1:12.5 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, Vihtavuori N560 rank at the top here: for 7 mm STW with the .284 | 140gr | Alaska Bullet Works Kodiak SP SPBC 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.