Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 180gr | Hornady ELD-Match bullet and 42 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 Alliant Reloder-33.
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% | 56,536 psi | 89% | 2808 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 57,276 psi | 90% | 2940 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 82% | 56,159 psi | 88% | 2913 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 56,275 psi | 88% | 2910 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 57,014 psi | 89% | 3051 fps | 99.9% |
| ADI AR 2225 | <<locked>> | 92% | 56,405 psi | 88% | 2933 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 56,768 psi | 89% | 2907 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 55,216 psi | 87% | 2805 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 56,333 psi | 88% | 2890 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 55,027 psi | 86% | 2959 fps | 99.5% |
| Alliant Reloder-50 | <<locked>> | 94% | 55,579 psi | 87% | 2959 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 55,941 psi | 88% | 2881 fps | 99.6% |
| Bofors RP15 | <<locked>> | 84% | 56,405 psi | 88% | 2904 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 56,304 psi | 88% | 2923 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 56,768 psi | 89% | 2907 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 57,421 psi | 90% | 2923 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 57,261 psi | 90% | 2887 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 56,449 psi | 88% | 2989 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,276 psi | 60% | 1864 fps | 100% |
| Hodgdon US 869 | <<locked>> | 98% | 57,667 psi | 90% | 2936 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 82% | 55,013 psi | 86% | 2904 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 56,840 psi | 89% | 2841 fps | 97.6% |
| IMR 8133 Enduron | <<locked>> | 94% | 55,361 psi | 87% | 2927 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 54,607 psi | 86% | 2838 fps | 96.2% |
| Lovex S071 | <<locked>> | 86% | 55,187 psi | 86% | 2789 fps | 100% |
| Norma 217 | <<locked>> | 94% | 57,130 psi | 90% | 2943 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 56,579 psi | 89% | 2927 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 56,391 psi | 88% | 2976 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 84% | 54,911 psi | 86% | 2851 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,334 psi | 62% | 1906 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 57,290 psi | 90% | 2972 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 56,028 psi | 88% | 2953 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 54,607 psi | 86% | 2838 fps | 96.2% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 54,737 psi | 86% | 2881 fps | 98.9% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 52,054 psi | 82% | 2858 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 84% | 57,101 psi | 89% | 2835 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 56,666 psi | 89% | 2881 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 84% | 54,346 psi | 85% | 2877 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 56,376 psi | 88% | 2956 fps | 100% |
| Vihtavuori N570 | <<locked>> | 88% | 54,273 psi | 85% | 2966 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 82% | 57,043 psi | 89% | 2904 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,434 psi | 88% | 2838 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% | 52,736 psi | 83% | 2756 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 39,697 psi | 62% | 2625 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 80% | 52,475 psi | 82% | 2858 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 39,566 psi | 62% | 2618 fps | 99.2% |
| ADI AR 2218 | 85.7 gr | 84% | 39,305 psi | 62% | 2700 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 80% | 37,028 psi | 58% | 2595 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 53,185 psi | 83% | 2854 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 51,866 psi | 81% | 2759 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 46,021 psi | 72% | 2733 fps | 100% |
| Alliant Reloder-33 | 83.1 gr | 80% | 37,942 psi | 59% | 2621 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 84% | 38,464 psi | 60% | 2625 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 49,168 psi | 77% | 2762 fps | 98.8% |
| Bofors RP15 | <<locked>> | 80% | 49,516 psi | 78% | 2792 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 42,960 psi | 67% | 2694 fps | 99.6% |
| Bofors RP5 | <<locked>> | 80% | 53,185 psi | 83% | 2854 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 43,221 psi | 68% | 2690 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,606 psi | 84% | 2831 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 45,643 psi | 72% | 2815 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,747 psi | 45% | 1663 fps | 100% |
| Hodgdon US 869 | <<locked>> | 96% | 53,853 psi | 84% | 2877 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 80% | 51,387 psi | 81% | 2844 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 82% | 46,847 psi | 73% | 2667 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 80% | 34,519 psi | 54% | 2520 fps | 97.7% |
| Lovex D100 | <<locked>> | 88% | 50,792 psi | 80% | 2776 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 45,716 psi | 72% | 2641 fps | 100% |
| Norma 217 | <<locked>> | 80% | 35,230 psi | 55% | 2549 fps | 99.5% |
| Ramshot Grand | <<locked>> | 80% | 52,533 psi | 82% | 2864 fps | 100% |
| Ramshot LRT | <<locked>> | 92% | 52,591 psi | 82% | 2910 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 80% | 47,485 psi | 74% | 2736 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,602 psi | 46% | 1706 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 45,498 psi | 71% | 2789 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 41,611 psi | 65% | 2694 fps | 98.6% |
| Shooters World 50 BMG | <<locked>> | 88% | 50,792 psi | 80% | 2776 fps | 95.3% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 41,742 psi | 65% | 2644 fps | 96% |
| Vihtavuori 20N29 | <<locked>> | 96% | 45,150 psi | 71% | 2730 fps | 95.3% |
| Vihtavuori N165 | <<locked>> | 80% | 50,009 psi | 78% | 2730 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 43,308 psi | 68% | 2641 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 80% | 47,398 psi | 74% | 2762 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 80% | 42,525 psi | 67% | 2707 fps | 98.4% |
| Vihtavuori N570 | 80 gr | 80% | 40,712 psi | 64% | 2700 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 52,953 psi | 83% | 2848 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 52,852 psi | 83% | 2785 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 | 180gr | Hornady ELD-Match. ADI AR 2218 delivers the highest muzzle velocity at 3,051 fps; across all powders the maximum-charge window runs from 1,864 fps to 3,051 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 180.0 gr projectile in 0.284" calls for a 1:9.5 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, Alliant Reloder-33 rank at the top here: for 7 mm KM Katzmaier with the .284 | 180gr | Hornady ELD-Match 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.