Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 175gr | Woodleigh PP SN bullet and 41 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and IMR 8133 Enduron.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 56,782 psi | 89% | 2848 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 57,711 psi | 90% | 2976 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 82% | 56,405 psi | 88% | 2953 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 56,652 psi | 89% | 2949 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 57,595 psi | 90% | 3091 fps | 99.8% |
| ADI AR 2225 | <<locked>> | 92% | 56,884 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 57,000 psi | 89% | 2946 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 55,579 psi | 87% | 2848 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 56,695 psi | 89% | 2930 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 55,506 psi | 87% | 2995 fps | 99.4% |
| Alliant Reloder-50 | <<locked>> | 94% | 56,159 psi | 88% | 2999 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 56,275 psi | 88% | 2917 fps | 99.6% |
| Bofors RP15 | <<locked>> | 84% | 56,623 psi | 89% | 2943 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 56,782 psi | 89% | 2963 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 57,000 psi | 89% | 2946 fps | 100% |
| Hodgdon H1000 | <<locked>> | 86% | 53,867 psi | 84% | 2904 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 57,479 psi | 90% | 2923 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 57,058 psi | 89% | 3031 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,232 psi | 60% | 1893 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 55,259 psi | 87% | 2940 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 57,058 psi | 89% | 2881 fps | 97.5% |
| IMR 8133 Enduron | <<locked>> | 94% | 55,912 psi | 88% | 2966 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 55,042 psi | 86% | 2877 fps | 96.2% |
| Lovex S071 | <<locked>> | 86% | 55,477 psi | 87% | 2828 fps | 100% |
| Norma 217 | <<locked>> | 94% | 57,638 psi | 90% | 2986 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 56,985 psi | 89% | 2966 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 56,971 psi | 89% | 3015 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 84% | 55,303 psi | 87% | 2890 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,421 psi | 62% | 1939 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 57,624 psi | 90% | 3012 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 56,637 psi | 89% | 2992 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 55,042 psi | 86% | 2877 fps | 96.2% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 55,288 psi | 87% | 2920 fps | 98.9% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 52,446 psi | 82% | 2890 fps | 97.1% |
| Vihtavuori N165 | <<locked>> | 84% | 57,276 psi | 90% | 2871 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 56,884 psi | 89% | 2917 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 84% | 54,636 psi | 86% | 2917 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 56,869 psi | 89% | 2995 fps | 100% |
| Vihtavuori N570 | <<locked>> | 88% | 54,607 psi | 86% | 3002 fps | 99.1% |
| Winchester StaBALL HD | <<locked>> | 82% | 57,522 psi | 90% | 2943 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,811 psi | 89% | 2881 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 53,098 psi | 83% | 2792 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 40,030 psi | 63% | 2657 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 80% | 52,794 psi | 83% | 2897 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 39,885 psi | 63% | 2654 fps | 99.1% |
| ADI AR 2218 | 87.9 gr | 84% | 39,595 psi | 62% | 2730 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 37,159 psi | 58% | 2628 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 53,490 psi | 84% | 2894 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 52,112 psi | 82% | 2799 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 46,340 psi | 73% | 2769 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 38,348 psi | 60% | 2657 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 86% | 41,843 psi | 66% | 2730 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 49,472 psi | 78% | 2802 fps | 98.7% |
| Bofors RP15 | <<locked>> | 80% | 49,850 psi | 78% | 2831 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 43,308 psi | 68% | 2730 fps | 99.6% |
| Bofors RP5 | <<locked>> | 80% | 53,490 psi | 84% | 2894 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 43,526 psi | 68% | 2726 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,911 psi | 84% | 2867 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 45,818 psi | 72% | 2848 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,790 psi | 45% | 1696 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 51,706 psi | 81% | 2884 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 82% | 47,079 psi | 74% | 2703 fps | 95.2% |
| IMR 8133 Enduron | 76.9 gr | 80% | 34,708 psi | 54% | 2552 fps | 97.5% |
| Lovex D100 | <<locked>> | 88% | 51,126 psi | 80% | 2812 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 45,832 psi | 72% | 2677 fps | 100% |
| Norma 217 | <<locked>> | 80% | 35,447 psi | 56% | 2579 fps | 99.3% |
| Ramshot Grand | <<locked>> | 80% | 52,837 psi | 83% | 2904 fps | 100% |
| Ramshot LRT | <<locked>> | 92% | 53,026 psi | 83% | 2949 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 80% | 47,819 psi | 75% | 2772 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,631 psi | 46% | 1736 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 45,861 psi | 72% | 2825 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 42,047 psi | 66% | 2730 fps | 98.5% |
| Shooters World 50 BMG | <<locked>> | 88% | 51,126 psi | 80% | 2812 fps | 95.2% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 42,119 psi | 66% | 2680 fps | 95.8% |
| Vihtavuori 20N29 | <<locked>> | 96% | 45,484 psi | 71% | 2762 fps | 95.1% |
| Vihtavuori N165 | <<locked>> | 80% | 50,328 psi | 79% | 2766 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 43,482 psi | 68% | 2674 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 80% | 47,659 psi | 75% | 2795 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 80% | 42,888 psi | 67% | 2740 fps | 98.3% |
| Vihtavuori N570 | 82 gr | 80% | 40,930 psi | 64% | 2733 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 53,461 psi | 84% | 2890 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 53,098 psi | 83% | 2825 fps | 100% |
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 44 powders for 7 mm KM Katzmaier loaded with the .284 | 175gr | Woodleigh PP SN. ADI AR 2218 delivers the highest muzzle velocity at 3,091 fps; across all powders the maximum-charge window runs from 1,893 fps to 3,091 fps. Accurate 8700 gives the best case fill at 100 %, and 44 of the 44 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 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. ADI AR 2218, Vihtavuori N570, IMR 8133 Enduron rank at the top here: for 7 mm KM Katzmaier with the .284 | 175gr | Woodleigh PP SN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon 50BMG burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.