Load Specifications
Load data in caliber 7 mm STW with .284 | 150gr | Prvi Partizan HP 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.
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>> | 92% | 59,495 psi | 89% | 2956 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 60,017 psi | 90% | 2982 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 58,334 psi | 87% | 3058 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 88% | 57,029 psi | 85% | 2989 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 92% | 59,146 psi | 89% | 3058 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 57,261 psi | 86% | 3022 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,880 psi | 78% | 2986 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,116 psi | 86% | 2982 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 60,292 psi | 90% | 3035 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 59,422 psi | 89% | 3051 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 57,058 psi | 86% | 2959 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 57,043 psi | 86% | 3025 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 57,986 psi | 87% | 3048 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 54,984 psi | 82% | 3041 fps | 96.8% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 59,872 psi | 90% | 3012 fps | 97.8% |
| Bofors RP15 | <<locked>> | 94% | 58,552 psi | 88% | 3038 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 56,913 psi | 85% | 3035 fps | 99.6% |
| Bofors RP5 | <<locked>> | 92% | 59,422 psi | 89% | 3051 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 57,392 psi | 86% | 2927 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 59,176 psi | 89% | 3051 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 57,464 psi | 86% | 2982 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 59,683 psi | 89% | 2992 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 58,450 psi | 88% | 2992 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 57,276 psi | 86% | 2972 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,203 psi | 86% | 2900 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 59,930 psi | 90% | 3166 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 58,537 psi | 88% | 3018 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,463 psi | 56% | 1900 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 59,437 psi | 89% | 2966 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 58,624 psi | 88% | 2946 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 60,176 psi | 90% | 2969 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 58,885 psi | 88% | 2969 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 92% | 57,217 psi | 86% | 3035 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,210 psi | 71% | 2887 fps | 98.2% |
| Lovex S065 | <<locked>> | 84% | 59,756 psi | 90% | 2943 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 58,030 psi | 87% | 2943 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,101 psi | 86% | 2923 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,043 psi | 86% | 2969 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 47,979 psi | 72% | 2917 fps | 99.7% |
| Norma MRP | <<locked>> | 90% | 59,509 psi | 89% | 3068 fps | 100% |
| Norma URP | <<locked>> | 84% | 57,885 psi | 87% | 2959 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 58,465 psi | 88% | 3058 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 56,869 psi | 85% | 2966 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 57,014 psi | 85% | 2989 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,305 psi | 57% | 1946 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 60,263 psi | 90% | 3005 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 58,842 psi | 88% | 3031 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,927 psi | 85% | 3097 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 56,391 psi | 85% | 3054 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 88% | 57,856 psi | 87% | 2959 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 90% | 60,147 psi | 90% | 3028 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 57,392 psi | 86% | 2927 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 59,756 psi | 90% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 58,030 psi | 87% | 2943 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 58,784 psi | 88% | 2897 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 59,741 psi | 90% | 3022 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 59,509 psi | 89% | 2949 fps | 99.2% |
| Somchem S365 | <<locked>> | 86% | 59,146 psi | 89% | 2963 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,739 psi | 85% | 2940 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 59,785 psi | 90% | 2881 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 59,669 psi | 89% | 2953 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 60,292 psi | 90% | 2976 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 59,524 psi | 89% | 2986 fps | 96% |
| Vihtavuori N550 | <<locked>> | 84% | 58,871 psi | 88% | 2956 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 59,234 psi | 89% | 2989 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 58,972 psi | 88% | 3068 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 96% | 59,698 psi | 89% | 3054 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 98% | 56,927 psi | 85% | 3058 fps | 98.5% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 58,059 psi | 87% | 3114 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 59,248 psi | 89% | 2900 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,682 psi | 86% | 2986 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 56,376 psi | 85% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 56,565 psi | 85% | 2933 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% | 39,523 psi | 59% | 2621 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 52,315 psi | 78% | 2871 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 43,845 psi | 66% | 2795 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 43,395 psi | 65% | 2749 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 80% | 38,885 psi | 58% | 2677 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 88% | 37,985 psi | 57% | 2654 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 86% | 32,242 psi | 48% | 2549 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,009 psi | 75% | 2874 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,468 psi | 65% | 2743 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,436 psi | 59% | 2687 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,189 psi | 57% | 2648 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,924 psi | 49% | 2559 fps | 98% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,743 psi | 64% | 2799 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 50,865 psi | 76% | 2969 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 49,487 psi | 74% | 2835 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 36,709 psi | 55% | 2625 fps | 95.7% |
| Bofors RP30 | <<locked>> | 86% | 37,579 psi | 56% | 2664 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 39,436 psi | 59% | 2687 fps | 96.8% |
| Bofors RP7 | <<locked>> | 80% | 53,896 psi | 81% | 2871 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 36,187 psi | 54% | 2612 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 53,737 psi | 81% | 2923 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 55,854 psi | 84% | 2936 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 80% | 41,408 psi | 62% | 2684 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,727 psi | 61% | 2671 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,137 psi | 71% | 2753 fps | 100% |
| Hodgdon Retumbo | 67.7 gr | 82% | 34,447 psi | 52% | 2648 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 54,172 psi | 81% | 2953 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,992 psi | 42% | 1699 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,153 psi | 74% | 2802 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 55,114 psi | 83% | 2894 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 49,501 psi | 74% | 2812 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,757 psi | 64% | 2684 fps | 96.1% |
| IMR 7828 SSC | <<locked>> | 82% | 40,248 psi | 60% | 2723 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 94% | 38,406 psi | 58% | 2703 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 52,808 psi | 79% | 2841 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,242 psi | 77% | 2838 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 33,982 psi | 51% | 2497 fps | 97.5% |
| Norma 204 | <<locked>> | 80% | 49,748 psi | 75% | 2848 fps | 98.9% |
| Norma 217 | <<locked>> | 90% | 33,721 psi | 51% | 2605 fps | 96% |
| Norma MRP | <<locked>> | 80% | 41,785 psi | 63% | 2762 fps | 98.7% |
| Norma URP | <<locked>> | 80% | 50,908 psi | 76% | 2854 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,362 psi | 56% | 2664 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 49,748 psi | 75% | 2854 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,431 psi | 50% | 2539 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,805 psi | 43% | 1745 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,388 psi | 79% | 2890 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,894 psi | 76% | 2913 fps | 100% |
| ReloadSwiss RS 76 | 70.7 gr | 80% | 31,343 psi | 47% | 2549 fps | 95.3% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 41,408 psi | 62% | 2776 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 44,614 psi | 67% | 2730 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 80% | 42,946 psi | 64% | 2733 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 80% | 53,896 psi | 81% | 2871 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,808 psi | 79% | 2841 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,242 psi | 77% | 2838 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,619 psi | 77% | 2792 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,612 psi | 64% | 2726 fps | 97.8% |
| Somchem S361 | <<locked>> | 80% | 45,498 psi | 68% | 2713 fps | 96.7% |
| Somchem S365 | <<locked>> | 80% | 48,283 psi | 72% | 2808 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,482 psi | 65% | 2713 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 80% | 56,130 psi | 84% | 2831 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 52,315 psi | 78% | 2848 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,855 psi | 57% | 2582 fps | 97% |
| Vihtavuori N170 | <<locked>> | 96% | 55,593 psi | 83% | 2927 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 51,590 psi | 77% | 2848 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,540 psi | 64% | 2723 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,655 psi | 62% | 2753 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 84% | 39,566 psi | 59% | 2687 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 92% | 45,905 psi | 69% | 2861 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 96% | 50,227 psi | 75% | 2979 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,677 psi | 77% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,911 psi | 81% | 2927 fps | 100% |
| Winchester StaBALL HD | 67.8 gr | 80% | 35,259 psi | 53% | 2680 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,929 psi | 60% | 2638 fps | 97% |
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 | 150gr | Prvi Partizan HP BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,900 fps to 3,166 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 150.0 gr projectile in 0.284" calls for a 1:11.5 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 | 150gr | Prvi Partizan HP 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.