Load Specifications
Load data in caliber 7 mm KM Katzmaier with .287 | 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% | 56,652 psi | 89% | 2844 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 53,577 psi | 84% | 2910 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 82% | 56,463 psi | 88% | 2953 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 56,536 psi | 89% | 2946 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 57,479 psi | 90% | 3091 fps | 99.8% |
| ADI AR 2225 | <<locked>> | 92% | 56,753 psi | 89% | 2969 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 57,072 psi | 89% | 2946 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 55,622 psi | 87% | 2848 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 56,768 psi | 89% | 2930 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 55,579 psi | 87% | 2999 fps | 99.4% |
| Alliant Reloder-50 | <<locked>> | 94% | 56,028 psi | 88% | 2995 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 56,318 psi | 88% | 2917 fps | 99.6% |
| Bofors RP15 | <<locked>> | 84% | 56,695 psi | 89% | 2943 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 56,623 psi | 89% | 2963 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 57,072 psi | 89% | 2946 fps | 100% |
| Hodgdon H1000 | <<locked>> | 86% | 53,925 psi | 85% | 2904 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 57,522 psi | 90% | 2927 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 56,884 psi | 89% | 3028 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,261 psi | 60% | 1893 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 55,332 psi | 87% | 2943 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 57,116 psi | 90% | 2881 fps | 97.5% |
| IMR 8133 Enduron | <<locked>> | 94% | 55,767 psi | 87% | 2963 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 54,926 psi | 86% | 2874 fps | 96.1% |
| Lovex S071 | <<locked>> | 86% | 55,521 psi | 87% | 2828 fps | 100% |
| Norma 217 | <<locked>> | 94% | 57,479 psi | 90% | 2982 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 56,840 psi | 89% | 2966 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 56,826 psi | 89% | 3015 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 84% | 55,390 psi | 87% | 2890 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,291 psi | 62% | 1936 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 57,682 psi | 90% | 3012 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 56,478 psi | 89% | 2989 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 54,926 psi | 86% | 2874 fps | 96.1% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 55,143 psi | 86% | 2920 fps | 98.8% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 52,504 psi | 82% | 2894 fps | 97.1% |
| Vihtavuori N165 | <<locked>> | 84% | 57,348 psi | 90% | 2871 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 56,971 psi | 89% | 2920 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 84% | 54,534 psi | 85% | 2913 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 56,753 psi | 89% | 2995 fps | 100% |
| Vihtavuori N570 | <<locked>> | 88% | 54,665 psi | 86% | 3002 fps | 99.1% |
| Winchester StaBALL HD | <<locked>> | 82% | 57,493 psi | 90% | 2943 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,869 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% | 53,127 psi | 83% | 2792 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 39,943 psi | 63% | 2657 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 80% | 52,649 psi | 83% | 2894 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 39,798 psi | 62% | 2651 fps | 99.1% |
| ADI AR 2218 | 87.9 gr | 84% | 39,639 psi | 62% | 2733 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 37,188 psi | 58% | 2628 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 53,359 psi | 84% | 2890 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 52,156 psi | 82% | 2799 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 46,238 psi | 72% | 2766 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 38,247 psi | 60% | 2654 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 86% | 41,756 psi | 65% | 2726 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 49,342 psi | 77% | 2802 fps | 98.7% |
| Bofors RP15 | <<locked>> | 80% | 49,748 psi | 78% | 2828 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 43,323 psi | 68% | 2730 fps | 99.6% |
| Bofors RP5 | <<locked>> | 80% | 53,359 psi | 84% | 2890 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 43,381 psi | 68% | 2726 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,780 psi | 84% | 2867 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 45,876 psi | 72% | 2851 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,805 psi | 45% | 1696 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 51,605 psi | 81% | 2881 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 82% | 47,108 psi | 74% | 2707 fps | 95.2% |
| IMR 8133 Enduron | 76.9 gr | 80% | 34,766 psi | 54% | 2552 fps | 97.5% |
| Lovex D100 | <<locked>> | 88% | 51,184 psi | 80% | 2812 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 45,905 psi | 72% | 2677 fps | 100% |
| Norma 217 | <<locked>> | 80% | 35,476 psi | 56% | 2579 fps | 99.4% |
| Ramshot Grand | <<locked>> | 80% | 52,866 psi | 83% | 2904 fps | 100% |
| Ramshot LRT | <<locked>> | 92% | 52,881 psi | 83% | 2946 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 80% | 47,718 psi | 75% | 2772 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,646 psi | 46% | 1736 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 45,745 psi | 72% | 2822 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 41,945 psi | 66% | 2726 fps | 98.5% |
| Shooters World 50 BMG | <<locked>> | 88% | 51,184 psi | 80% | 2812 fps | 95.2% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 42,018 psi | 66% | 2677 fps | 95.8% |
| Vihtavuori 20N29 | <<locked>> | 96% | 45,542 psi | 71% | 2766 fps | 95.2% |
| Vihtavuori N165 | <<locked>> | 80% | 50,372 psi | 79% | 2766 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 43,526 psi | 68% | 2677 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 80% | 47,688 psi | 75% | 2795 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 80% | 42,786 psi | 67% | 2740 fps | 98.2% |
| Vihtavuori N570 | 82 gr | 80% | 40,988 psi | 64% | 2733 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 53,287 psi | 84% | 2887 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 53,142 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 .287 | 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. Hodgdon TrailBoss 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 0.287" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori 20N29 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 .287 | 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.