Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 184gr | Berger F-Open 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 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% | 56,811 psi | 89% | 2782 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 53,693 psi | 84% | 2858 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 82% | 56,681 psi | 89% | 2894 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 56,710 psi | 89% | 2887 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 57,682 psi | 90% | 3035 fps | 99.9% |
| ADI AR 2225 | <<locked>> | 92% | 56,913 psi | 89% | 2910 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 57,261 psi | 90% | 2887 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 55,680 psi | 87% | 2785 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 56,942 psi | 89% | 2867 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 55,608 psi | 87% | 2940 fps | 99.6% |
| Alliant Reloder-50 | <<locked>> | 94% | 56,072 psi | 88% | 2940 fps | 99.4% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 56,434 psi | 88% | 2861 fps | 99.7% |
| Bofors RP15 | <<locked>> | 84% | 56,898 psi | 89% | 2881 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 56,739 psi | 89% | 2900 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 57,261 psi | 90% | 2887 fps | 100% |
| Hodgdon H1000 | <<locked>> | 86% | 53,983 psi | 85% | 2844 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 57,725 psi | 90% | 2864 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 57,159 psi | 90% | 2969 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,232 psi | 60% | 1841 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 55,535 psi | 87% | 2881 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 57,130 psi | 90% | 2822 fps | 97.8% |
| IMR 8133 Enduron | <<locked>> | 94% | 55,883 psi | 88% | 2904 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 54,911 psi | 86% | 2818 fps | 96.5% |
| Lovex S071 | <<locked>> | 86% | 55,637 psi | 87% | 2769 fps | 100% |
| Norma 217 | <<locked>> | 94% | 57,682 psi | 90% | 2923 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 56,985 psi | 89% | 2904 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 57,058 psi | 89% | 2959 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 84% | 55,332 psi | 87% | 2828 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,305 psi | 62% | 1883 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 57,653 psi | 90% | 2949 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 56,608 psi | 89% | 2933 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 54,911 psi | 86% | 2818 fps | 96.5% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 55,332 psi | 87% | 2864 fps | 99.1% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 52,533 psi | 82% | 2841 fps | 97.5% |
| Vihtavuori 24N41 | <<locked>> | 94% | 54,839 psi | 86% | 2867 fps | 96% |
| Vihtavuori N165 | <<locked>> | 84% | 57,392 psi | 90% | 2808 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 57,101 psi | 89% | 2861 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 84% | 54,694 psi | 86% | 2858 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 56,898 psi | 89% | 2936 fps | 100% |
| Vihtavuori N570 | <<locked>> | 88% | 54,795 psi | 86% | 2946 fps | 99.4% |
| Winchester StaBALL HD | <<locked>> | 82% | 57,725 psi | 90% | 2881 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,927 psi | 89% | 2815 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% | 53,171 psi | 83% | 2733 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 39,972 psi | 63% | 2608 fps | 96% |
| ADI AR 2213 | <<locked>> | 80% | 52,736 psi | 83% | 2831 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 39,958 psi | 63% | 2602 fps | 99.4% |
| ADI AR 2218 | 83 gr | 82% | 36,883 psi | 58% | 2612 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 37,260 psi | 58% | 2575 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 53,447 psi | 84% | 2828 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 52,286 psi | 82% | 2736 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 46,441 psi | 73% | 2710 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 38,435 psi | 60% | 2612 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 84% | 38,870 psi | 61% | 2612 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 49,559 psi | 78% | 2746 fps | 99% |
| Bofors RP15 | <<locked>> | 80% | 49,893 psi | 78% | 2769 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 43,381 psi | 68% | 2674 fps | 99.7% |
| Bofors RP5 | <<locked>> | 80% | 53,447 psi | 84% | 2828 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 43,642 psi | 68% | 2674 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,853 psi | 84% | 2805 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 45,963 psi | 72% | 2792 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,776 psi | 45% | 1647 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 51,837 psi | 81% | 2825 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 82% | 47,210 psi | 74% | 2651 fps | 95.6% |
| IMR 8133 Enduron | 74.4 gr | 80% | 34,882 psi | 55% | 2507 fps | 98% |
| Lovex D100 | <<locked>> | 88% | 51,271 psi | 80% | 2756 fps | 95.6% |
| Lovex S071 | <<locked>> | 80% | 46,064 psi | 72% | 2621 fps | 100% |
| Norma 217 | <<locked>> | 80% | 35,636 psi | 56% | 2533 fps | 99.6% |
| Ramshot Grand | <<locked>> | 80% | 53,113 psi | 83% | 2848 fps | 100% |
| Ramshot LRT | <<locked>> | 92% | 52,953 psi | 83% | 2890 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 80% | 47,790 psi | 75% | 2713 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,646 psi | 46% | 1686 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 45,919 psi | 72% | 2769 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 42,134 psi | 66% | 2680 fps | 98.9% |
| Shooters World 50 BMG | <<locked>> | 88% | 51,271 psi | 80% | 2756 fps | 95.6% |
| SNPE Vectan SP 13 | <<locked>> | 88% | 39,262 psi | 62% | 2569 fps | 95.3% |
| Vihtavuori 20N29 | <<locked>> | 96% | 45,513 psi | 71% | 2713 fps | 95.7% |
| Vihtavuori 24N41 | <<locked>> | 92% | 51,068 psi | 80% | 2802 fps | 95% |
| Vihtavuori N165 | <<locked>> | 80% | 50,401 psi | 79% | 2707 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 43,555 psi | 68% | 2625 fps | 96.2% |
| Vihtavuori N565 | <<locked>> | 80% | 47,848 psi | 75% | 2743 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 80% | 42,844 psi | 67% | 2687 fps | 98.6% |
| Vihtavuori N570 | 79.3 gr | 80% | 41,031 psi | 64% | 2680 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 53,534 psi | 84% | 2828 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 53,272 psi | 83% | 2766 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 | 184gr | Berger F-Open Hybrid Target. ADI AR 2218 delivers the highest muzzle velocity at 3,035 fps; across all powders the maximum-charge window runs from 1,841 fps to 3,035 fps. Hodgdon TrailBoss 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 184.0 gr projectile in 0.284" calls for a 1:9.0 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 .284 | 184gr | Berger F-Open 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.