Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 180gr | CutEdge MTH bullet and 47 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>> | 84% | 57,319 psi | 90% | 2822 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,780 psi | 84% | 2887 fps | 99% |
| Accurate MAGPRO | <<locked>> | 82% | 56,724 psi | 89% | 2943 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 57,406 psi | 90% | 2936 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 57,203 psi | 90% | 2927 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 53,650 psi | 84% | 2999 fps | 99.6% |
| ADI AR 2225 | <<locked>> | 94% | 57,101 psi | 89% | 2946 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 54,056 psi | 85% | 2867 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,275 psi | 88% | 2825 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,377 psi | 90% | 2910 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,695 psi | 87% | 2969 fps | 99.5% |
| Alliant Reloder-50 | <<locked>> | 96% | 55,840 psi | 88% | 2966 fps | 99.2% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,435 psi | 90% | 2900 fps | 99.7% |
| Bofors RP15 | <<locked>> | 86% | 57,450 psi | 90% | 2920 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 57,087 psi | 89% | 2936 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 54,056 psi | 85% | 2867 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 54,549 psi | 85% | 2884 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,753 psi | 87% | 2864 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 54,752 psi | 86% | 2848 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,217 psi | 90% | 3005 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,101 psi | 60% | 1850 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,854 psi | 88% | 2841 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 56,115 psi | 88% | 2923 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,549 psi | 85% | 2802 fps | 97% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,724 psi | 87% | 2933 fps | 100% |
| Lovex D100 | <<locked>> | 92% | 55,709 psi | 87% | 2854 fps | 96.3% |
| Lovex S071 | <<locked>> | 88% | 55,709 psi | 87% | 2799 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,406 psi | 90% | 2953 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,740 psi | 90% | 2946 fps | 100% |
| Ramshot LRT | <<locked>> | 96% | 57,319 psi | 90% | 2992 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 86% | 55,999 psi | 88% | 2871 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,146 psi | 61% | 1893 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 53,621 psi | 84% | 2927 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,840 psi | 89% | 2969 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 92% | 55,709 psi | 87% | 2854 fps | 96.3% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,187 psi | 86% | 2890 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,450 psi | 90% | 2887 fps | 100% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 48,617 psi | 76% | 2799 fps | 96.2% |
| Vihtavuori N165 | <<locked>> | 84% | 54,578 psi | 86% | 2799 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,537 psi | 90% | 2897 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 82% | 57,696 psi | 90% | 2848 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,377 psi | 90% | 2949 fps | 100% |
| Vihtavuori N565 | <<locked>> | 86% | 54,940 psi | 86% | 2890 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 57,232 psi | 90% | 2969 fps | 100% |
| Vihtavuori N570 | <<locked>> | 90% | 54,795 psi | 86% | 2976 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,667 psi | 90% | 2920 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 53,896 psi | 84% | 2802 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% | 49,966 psi | 78% | 2717 fps | 100% |
| Accurate 8700 | <<locked>> | 92% | 39,784 psi | 62% | 2631 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 80% | 52,794 psi | 83% | 2881 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 80% | 49,850 psi | 78% | 2815 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 80% | 37,246 psi | 58% | 2572 fps | 98.6% |
| ADI AR 2218 | 85.6 gr | 86% | 39,740 psi | 62% | 2710 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 80% | 34,476 psi | 54% | 2543 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,473 psi | 79% | 2812 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,240 psi | 77% | 2723 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,395 psi | 68% | 2690 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 82% | 38,116 psi | 60% | 2631 fps | 95.4% |
| Alliant Reloder-50 | <<locked>> | 88% | 41,234 psi | 65% | 2694 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,152 psi | 74% | 2730 fps | 98.3% |
| Bofors RP15 | <<locked>> | 80% | 47,007 psi | 74% | 2753 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 40,364 psi | 63% | 2641 fps | 99.2% |
| Bofors RP5 | <<locked>> | 80% | 50,473 psi | 79% | 2812 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 40,785 psi | 64% | 2648 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 80% | 52,054 psi | 82% | 2808 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,126 psi | 80% | 2792 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,670 psi | 67% | 2762 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,631 psi | 45% | 1657 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,330 psi | 82% | 2785 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 80% | 48,849 psi | 77% | 2805 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 84% | 47,877 psi | 75% | 2687 fps | 95.4% |
| IMR 8133 Enduron | 73.1 gr | 80% | 31,981 psi | 50% | 2461 fps | 96.6% |
| Lovex D100 | <<locked>> | 90% | 51,837 psi | 81% | 2792 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 43,120 psi | 68% | 2598 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,518 psi | 51% | 2487 fps | 98.8% |
| Ramshot Grand | <<locked>> | 80% | 49,647 psi | 78% | 2822 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 53,258 psi | 83% | 2923 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 80% | 44,730 psi | 70% | 2694 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,457 psi | 46% | 1696 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,395 psi | 66% | 2740 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,841 psi | 61% | 2638 fps | 97.8% |
| Shooters World 50 BMG | <<locked>> | 90% | 51,837 psi | 81% | 2792 fps | 95.4% |
| SNPE Vectan SP 13 | <<locked>> | 92% | 41,814 psi | 66% | 2648 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,838 psi | 84% | 2835 fps | 100% |
| Vihtavuori 20N29 | <<locked>> | 98% | 45,092 psi | 71% | 2733 fps | 95.1% |
| Vihtavuori N165 | <<locked>> | 80% | 47,645 psi | 75% | 2690 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 43,743 psi | 69% | 2654 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 80% | 54,099 psi | 85% | 2802 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,592 psi | 84% | 2890 fps | 100% |
| Vihtavuori N565 | <<locked>> | 80% | 44,759 psi | 70% | 2713 fps | 99.4% |
| Vihtavuori N568 | <<locked>> | 80% | 39,842 psi | 62% | 2651 fps | 97.6% |
| Vihtavuori N570 | 79.9 gr | 82% | 40,857 psi | 64% | 2707 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,792 psi | 78% | 2808 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,299 psi | 79% | 2746 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 47 powders for 7 mm KM Katzmaier loaded with the .284 | 180gr | CutEdge MTH. Hodgdon Retumbo delivers the highest muzzle velocity at 3,005 fps; across all powders the maximum-charge window runs from 1,850 fps to 3,005 fps. Accurate 8700 gives the best case fill at 100 %, and 47 of the 47 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 1:8.0 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, IMR 8133 Enduron rank at the top here: for 7 mm KM Katzmaier with the .284 | 180gr | CutEdge MTH 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.