Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 170gr | CutEdge MTH bullet and 49 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>> | 84% | 56,202 psi | 88% | 2881 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 52,402 psi | 82% | 2933 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 82% | 55,608 psi | 87% | 2999 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 82% | 57,450 psi | 90% | 2972 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 56,405 psi | 88% | 2995 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,043 psi | 88% | 2979 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,608 psi | 89% | 3117 fps | 99.6% |
| ADI AR 2225 | <<locked>> | 94% | 55,680 psi | 87% | 2999 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,942 psi | 89% | 2959 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 56,855 psi | 89% | 2986 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 55,201 psi | 87% | 2887 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 56,173 psi | 88% | 2969 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 54,520 psi | 85% | 3018 fps | 99.1% |
| Alliant Reloder-50 | <<locked>> | 96% | 54,433 psi | 85% | 3009 fps | 98.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,536 psi | 89% | 2959 fps | 99.4% |
| Bofors RP15 | <<locked>> | 86% | 56,275 psi | 88% | 2976 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,796 psi | 87% | 2992 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 56,855 psi | 89% | 2986 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 57,450 psi | 90% | 2999 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 54,897 psi | 86% | 2923 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 84% | 57,682 psi | 90% | 2966 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 55,999 psi | 88% | 3064 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,043 psi | 60% | 1906 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 54,998 psi | 86% | 2900 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 54,897 psi | 86% | 2976 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 57,305 psi | 90% | 2917 fps | 97.1% |
| IMR 8133 Enduron | <<locked>> | 96% | 54,650 psi | 86% | 2989 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 54,810 psi | 86% | 2861 fps | 100% |
| Norma 217 | <<locked>> | 96% | 56,159 psi | 88% | 3009 fps | 100% |
| Norma MRP | <<locked>> | 82% | 57,014 psi | 89% | 2995 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 56,492 psi | 89% | 3002 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 54,853 psi | 86% | 2927 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,044 psi | 61% | 1952 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 56,652 psi | 89% | 3045 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 55,535 psi | 87% | 3018 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 82% | 57,522 psi | 90% | 2940 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 56,797 psi | 89% | 2953 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 54,230 psi | 85% | 2943 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 56,420 psi | 88% | 2949 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,811 psi | 89% | 2917 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 57,174 psi | 90% | 2910 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,637 psi | 89% | 2949 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 82% | 56,695 psi | 89% | 2913 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 56,318 psi | 88% | 3009 fps | 100% |
| Vihtavuori N565 | <<locked>> | 88% | 57,696 psi | 90% | 3005 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 55,912 psi | 88% | 3022 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 90% | 53,693 psi | 84% | 3025 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 84% | 56,318 psi | 88% | 2976 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,797 psi | 89% | 2917 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% | 49,095 psi | 77% | 2772 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 41,727 psi | 65% | 2730 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 80% | 51,822 psi | 81% | 2933 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 80% | 53,679 psi | 84% | 2913 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,921 psi | 77% | 2871 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 80% | 36,347 psi | 57% | 2612 fps | 97.9% |
| ADI AR 2218 | 87.5 gr | 86% | 38,841 psi | 61% | 2746 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 33,663 psi | 53% | 2585 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 80% | 53,345 psi | 84% | 2904 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,530 psi | 78% | 2867 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 48,196 psi | 76% | 2782 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,496 psi | 67% | 2743 fps | 100% |
| Alliant Reloder-33 | 87 gr | 84% | 40,132 psi | 63% | 2736 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 88% | 40,248 psi | 63% | 2733 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,282 psi | 73% | 2776 fps | 97.7% |
| Bofors RP15 | <<locked>> | 80% | 46,006 psi | 72% | 2802 fps | 99.9% |
| Bofors RP30 | <<locked>> | 80% | 39,479 psi | 62% | 2690 fps | 98.7% |
| Bofors RP5 | <<locked>> | 80% | 49,530 psi | 78% | 2867 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 39,740 psi | 62% | 2687 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 80% | 51,155 psi | 80% | 2861 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,241 psi | 79% | 2848 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 80% | 41,655 psi | 65% | 2812 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,485 psi | 45% | 1706 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,576 psi | 81% | 2844 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 80% | 47,718 psi | 75% | 2854 fps | 99.7% |
| IMR 7977 Enduron | <<locked>> | 86% | 50,241 psi | 79% | 2795 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 80% | 31,125 psi | 49% | 2497 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 42,163 psi | 66% | 2651 fps | 100% |
| Norma 217 | <<locked>> | 80% | 31,589 psi | 50% | 2523 fps | 98% |
| Norma MRP | <<locked>> | 80% | 53,113 psi | 83% | 2936 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 48,486 psi | 76% | 2874 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 43,627 psi | 68% | 2740 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,283 psi | 46% | 1745 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 41,307 psi | 65% | 2785 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,840 psi | 59% | 2674 fps | 96.9% |
| Rottweil R 904 | <<locked>> | 80% | 53,867 psi | 84% | 2884 fps | 100% |
| Rottweil R 905 | <<locked>> | 80% | 53,098 psi | 83% | 2897 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 43,845 psi | 69% | 2753 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,765 psi | 83% | 2890 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 53,243 psi | 83% | 2861 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,833 psi | 73% | 2746 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 42,960 psi | 67% | 2700 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 53,040 psi | 83% | 2861 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 52,475 psi | 82% | 2943 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 80% | 43,801 psi | 69% | 2762 fps | 99% |
| Vihtavuori N568 | <<locked>> | 80% | 38,841 psi | 61% | 2690 fps | 96.7% |
| Vihtavuori N570 | 81.7 gr | 82% | 39,900 psi | 63% | 2749 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 48,486 psi | 76% | 2864 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,400 psi | 77% | 2802 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 56 powders for 7 mm KM Katzmaier loaded with the .284 | 170gr | CutEdge MTH. ADI AR 2218 delivers the highest muzzle velocity at 3,117 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,117 fps. Accurate 8700 gives the best case fill at 100 %, and 56 of the 56 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 170.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, Hodgdon US 869 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 | 170gr | CutEdge MTH they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon 50BMG, Vihtavuori 24N41 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.