Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 160gr | Nosler Partition bullet and 45 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% | 57,406 psi | 90% | 2969 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,664 psi | 84% | 3015 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 82% | 56,594 psi | 89% | 3084 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 84% | 57,174 psi | 90% | 3081 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,855 psi | 89% | 3064 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 57,682 psi | 90% | 3202 fps | 99.5% |
| ADI AR 2225 | <<locked>> | 94% | 56,840 psi | 89% | 3087 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,653 psi | 90% | 3045 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,711 psi | 90% | 3074 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,086 psi | 88% | 2972 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,101 psi | 89% | 3054 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,666 psi | 87% | 3104 fps | 98.9% |
| Alliant Reloder-50 | <<locked>> | 96% | 56,086 psi | 88% | 3100 fps | 98.6% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,145 psi | 90% | 3038 fps | 99.2% |
| Bofors RP15 | <<locked>> | 86% | 57,101 psi | 89% | 3064 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,884 psi | 89% | 3077 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,711 psi | 90% | 3074 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 54,288 psi | 85% | 3025 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,550 psi | 87% | 3005 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 82% | 54,607 psi | 86% | 2992 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,884 psi | 89% | 3153 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,029 psi | 60% | 1972 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,666 psi | 87% | 2982 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 84% | 55,695 psi | 87% | 3061 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,375 psi | 85% | 2933 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,767 psi | 87% | 3074 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 55,912 psi | 88% | 2949 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,348 psi | 90% | 3097 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,435 psi | 90% | 3091 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 55,898 psi | 88% | 3012 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,175 psi | 61% | 2018 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 53,447 psi | 84% | 3068 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,913 psi | 89% | 3107 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 57,653 psi | 90% | 3041 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,448 psi | 87% | 3025 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,276 psi | 90% | 3035 fps | 100% |
| Vihtavuori N165 | <<locked>> | 84% | 54,389 psi | 85% | 2940 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,624 psi | 90% | 3035 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 82% | 57,653 psi | 90% | 3002 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,116 psi | 90% | 3094 fps | 100% |
| Vihtavuori N565 | <<locked>> | 86% | 55,042 psi | 86% | 3035 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 57,159 psi | 90% | 3110 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 90% | 54,737 psi | 86% | 3110 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,566 psi | 90% | 3068 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,725 psi | 90% | 3002 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% | 50,154 psi | 79% | 2858 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 42,917 psi | 67% | 2815 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 80% | 52,750 psi | 83% | 3018 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 49,719 psi | 78% | 2953 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 80% | 37,275 psi | 58% | 2694 fps | 97.7% |
| ADI AR 2218 | 92.7 gr | 88% | 42,772 psi | 67% | 2900 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 34,650 psi | 54% | 2667 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 80% | 53,983 psi | 85% | 2986 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,473 psi | 79% | 2953 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,124 psi | 77% | 2867 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,337 psi | 68% | 2828 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 84% | 41,234 psi | 65% | 2822 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 90% | 44,889 psi | 70% | 2890 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,891 psi | 73% | 2854 fps | 97.4% |
| Bofors RP15 | <<locked>> | 80% | 47,007 psi | 74% | 2890 fps | 99.8% |
| Bofors RP30 | <<locked>> | 80% | 40,437 psi | 63% | 2772 fps | 98.5% |
| Bofors RP5 | <<locked>> | 80% | 50,473 psi | 79% | 2953 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 40,611 psi | 64% | 2772 fps | 99% |
| Hodgdon H4831 | <<locked>> | 80% | 51,895 psi | 81% | 2946 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,024 psi | 80% | 2930 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,583 psi | 67% | 2897 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,674 psi | 45% | 1768 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,170 psi | 82% | 2927 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 80% | 48,573 psi | 76% | 2940 fps | 99.6% |
| IMR 7977 Enduron | <<locked>> | 86% | 50,908 psi | 80% | 2874 fps | 95.2% |
| IMR 8133 Enduron | 77.4 gr | 80% | 32,155 psi | 50% | 2579 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 43,294 psi | 68% | 2736 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,721 psi | 51% | 2608 fps | 97.9% |
| Ramshot Grand | <<locked>> | 80% | 49,501 psi | 78% | 2959 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 80% | 44,643 psi | 70% | 2825 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,472 psi | 46% | 1811 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,264 psi | 66% | 2867 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,899 psi | 61% | 2759 fps | 96.7% |
| Rottweil R 905 | <<locked>> | 80% | 53,882 psi | 84% | 2982 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 45,020 psi | 71% | 2835 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,534 psi | 84% | 2976 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,601 psi | 75% | 2828 fps | 100% |
| Vihtavuori N170 | <<locked>> | 84% | 47,065 psi | 74% | 2844 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 54,099 psi | 85% | 2949 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,417 psi | 84% | 3031 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 80% | 44,875 psi | 70% | 2848 fps | 98.9% |
| Vihtavuori N568 | <<locked>> | 80% | 39,914 psi | 63% | 2776 fps | 96.5% |
| Vihtavuori N570 | 86.7 gr | 84% | 44,063 psi | 69% | 2904 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,530 psi | 78% | 2949 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,227 psi | 79% | 2884 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 52 powders for 7 mm KM Katzmaier loaded with the .284 | 160gr | Nosler Partition. ADI AR 2218 delivers the highest muzzle velocity at 3,202 fps; across all powders the maximum-charge window runs from 1,972 fps to 3,202 fps. Accurate 8700 gives the best case fill at 100 %, and 52 of the 52 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 160.0 gr projectile in 0.284" calls for a 1:11.5 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, IMR 8133 Enduron rank at the top here: for 7 mm KM Katzmaier with the .284 | 160gr | Nosler Partition they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon 50BMG, Hodgdon US 869, 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.