Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 180gr | Berger Hybrid Target 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% | 56,521 psi | 89% | 2808 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 57,261 psi | 90% | 2940 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 82% | 56,144 psi | 88% | 2913 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 56,260 psi | 88% | 2910 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 56,985 psi | 89% | 3051 fps | 99.9% |
| ADI AR 2225 | <<locked>> | 92% | 56,391 psi | 88% | 2933 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 56,753 psi | 89% | 2907 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 55,216 psi | 87% | 2805 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 56,318 psi | 88% | 2890 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 55,013 psi | 86% | 2956 fps | 99.5% |
| Alliant Reloder-50 | <<locked>> | 94% | 55,593 psi | 87% | 2959 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 55,898 psi | 88% | 2877 fps | 99.6% |
| Bofors RP15 | <<locked>> | 84% | 56,405 psi | 88% | 2904 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 56,318 psi | 88% | 2923 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 56,753 psi | 89% | 2907 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 57,435 psi | 90% | 2923 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 57,246 psi | 90% | 2887 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 56,478 psi | 89% | 2989 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,276 psi | 60% | 1864 fps | 100% |
| Hodgdon US 869 | <<locked>> | 98% | 57,653 psi | 90% | 2940 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 82% | 54,998 psi | 86% | 2904 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 56,826 psi | 89% | 2841 fps | 97.6% |
| IMR 8133 Enduron | <<locked>> | 94% | 55,405 psi | 87% | 2923 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 54,592 psi | 86% | 2838 fps | 96.3% |
| Lovex S071 | <<locked>> | 86% | 55,172 psi | 86% | 2789 fps | 100% |
| Norma 217 | <<locked>> | 94% | 57,116 psi | 90% | 2943 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 56,565 psi | 89% | 2927 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 56,376 psi | 88% | 2976 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 84% | 54,897 psi | 86% | 2851 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,334 psi | 62% | 1906 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 57,276 psi | 90% | 2976 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 56,231 psi | 88% | 2956 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 54,592 psi | 86% | 2838 fps | 96.3% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 54,723 psi | 86% | 2881 fps | 98.9% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 52,040 psi | 82% | 2858 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 84% | 57,087 psi | 89% | 2831 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 56,652 psi | 89% | 2881 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 84% | 54,346 psi | 85% | 2877 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 56,362 psi | 88% | 2953 fps | 100% |
| Vihtavuori N570 | <<locked>> | 88% | 54,259 psi | 85% | 2966 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 82% | 56,971 psi | 89% | 2904 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,623 psi | 89% | 2841 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% | 52,765 psi | 83% | 2756 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 39,697 psi | 62% | 2621 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 80% | 52,460 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% | 39,291 psi | 62% | 2700 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 80% | 37,014 psi | 58% | 2595 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 53,171 psi | 83% | 2851 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 51,851 psi | 81% | 2759 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 46,006 psi | 72% | 2733 fps | 100% |
| Alliant Reloder-33 | 83.1 gr | 80% | 37,927 psi | 59% | 2621 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 84% | 38,450 psi | 60% | 2625 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 49,168 psi | 77% | 2762 fps | 98.8% |
| Bofors RP15 | <<locked>> | 80% | 49,501 psi | 78% | 2792 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 42,960 psi | 67% | 2694 fps | 99.6% |
| Bofors RP5 | <<locked>> | 80% | 53,171 psi | 83% | 2851 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 43,207 psi | 68% | 2690 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,592 psi | 84% | 2831 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 45,629 psi | 72% | 2812 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,747 psi | 45% | 1663 fps | 100% |
| Hodgdon US 869 | <<locked>> | 96% | 53,838 psi | 84% | 2877 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 80% | 51,372 psi | 81% | 2844 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 82% | 46,833 psi | 73% | 2667 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 80% | 34,505 psi | 54% | 2520 fps | 97.7% |
| Lovex D100 | <<locked>> | 88% | 50,821 psi | 80% | 2776 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 45,701 psi | 72% | 2641 fps | 100% |
| Norma 217 | <<locked>> | 80% | 35,259 psi | 55% | 2549 fps | 99.5% |
| Ramshot Grand | <<locked>> | 80% | 52,562 psi | 82% | 2864 fps | 100% |
| Ramshot LRT | <<locked>> | 92% | 52,576 psi | 82% | 2910 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 80% | 47,471 psi | 74% | 2736 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,588 psi | 46% | 1706 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 45,527 psi | 71% | 2789 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 41,611 psi | 65% | 2690 fps | 98.6% |
| Shooters World 50 BMG | <<locked>> | 88% | 50,821 psi | 80% | 2776 fps | 95.3% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 41,742 psi | 65% | 2644 fps | 95.9% |
| Vihtavuori 20N29 | <<locked>> | 96% | 45,136 psi | 71% | 2730 fps | 95.3% |
| Vihtavuori N165 | <<locked>> | 80% | 49,995 psi | 78% | 2730 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 43,308 psi | 68% | 2641 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 80% | 47,384 psi | 74% | 2759 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 80% | 42,511 psi | 67% | 2703 fps | 98.4% |
| Vihtavuori N570 | 80 gr | 80% | 40,741 psi | 64% | 2700 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 52,895 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 42 powders for 7 mm KM Katzmaier loaded with the .284 | 180gr | Berger Hybrid Target. 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 42 of the 42 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 1:9.0 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 | Berger Hybrid Target 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.