Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 160gr | Prvi Partizan PSP BT 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% | 57,421 psi | 90% | 2969 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,882 psi | 84% | 3018 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 82% | 56,811 psi | 89% | 3087 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 84% | 57,174 psi | 90% | 3081 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 57,087 psi | 89% | 3068 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 53,693 psi | 84% | 3133 fps | 99% |
| ADI AR 2225 | <<locked>> | 94% | 56,840 psi | 89% | 3087 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,682 psi | 90% | 3045 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,725 psi | 90% | 3071 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,115 psi | 88% | 2972 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,145 psi | 90% | 3054 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,898 psi | 88% | 3110 fps | 99% |
| Alliant Reloder-50 | <<locked>> | 96% | 56,304 psi | 88% | 3104 fps | 98.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,159 psi | 90% | 3038 fps | 99.2% |
| Bofors RP15 | <<locked>> | 86% | 57,319 psi | 90% | 3068 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 57,130 psi | 90% | 3084 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,725 psi | 90% | 3071 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 54,288 psi | 85% | 3022 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,767 psi | 87% | 3009 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 82% | 54,650 psi | 86% | 2992 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,116 psi | 90% | 3153 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,101 psi | 60% | 1975 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,709 psi | 87% | 2982 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 84% | 55,956 psi | 88% | 3068 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,404 psi | 85% | 2936 fps | 96.1% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,782 psi | 87% | 3074 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 55,927 psi | 88% | 2946 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,566 psi | 90% | 3097 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,479 psi | 90% | 3091 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 55,912 psi | 88% | 3012 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,102 psi | 61% | 2018 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 53,679 psi | 84% | 3071 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,913 psi | 89% | 3110 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 57,653 psi | 90% | 3038 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,448 psi | 87% | 3025 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,305 psi | 90% | 3035 fps | 100% |
| Vihtavuori N165 | <<locked>> | 84% | 54,418 psi | 85% | 2940 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,653 psi | 90% | 3031 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 82% | 57,653 psi | 90% | 2999 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,348 psi | 90% | 3094 fps | 100% |
| Vihtavuori N565 | <<locked>> | 86% | 55,071 psi | 86% | 3035 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 57,188 psi | 90% | 3110 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 90% | 54,766 psi | 86% | 3114 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,551 psi | 90% | 3068 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,740 psi | 90% | 3005 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% | 50,357 psi | 79% | 2861 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 43,076 psi | 68% | 2815 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 80% | 52,939 psi | 83% | 3022 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 49,734 psi | 78% | 2953 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 80% | 37,318 psi | 58% | 2694 fps | 97.8% |
| ADI AR 2218 | 92.9 gr | 88% | 42,960 psi | 67% | 2907 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 80% | 34,679 psi | 54% | 2667 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,186 psi | 85% | 2992 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,473 psi | 79% | 2953 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,168 psi | 77% | 2867 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,381 psi | 68% | 2828 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 84% | 41,394 psi | 65% | 2825 fps | 95.4% |
| Alliant Reloder-50 | <<locked>> | 90% | 44,918 psi | 70% | 2890 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,079 psi | 74% | 2858 fps | 97.5% |
| Bofors RP15 | <<locked>> | 80% | 47,065 psi | 74% | 2890 fps | 99.8% |
| Bofors RP30 | <<locked>> | 80% | 40,625 psi | 64% | 2776 fps | 98.6% |
| Bofors RP5 | <<locked>> | 80% | 50,473 psi | 79% | 2953 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 40,640 psi | 64% | 2772 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 80% | 51,938 psi | 81% | 2946 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,068 psi | 80% | 2930 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,656 psi | 67% | 2897 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,616 psi | 45% | 1768 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,214 psi | 82% | 2927 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 80% | 48,631 psi | 76% | 2940 fps | 99.6% |
| IMR 7977 Enduron | <<locked>> | 86% | 51,082 psi | 80% | 2877 fps | 95.2% |
| IMR 8133 Enduron | 77.5 gr | 80% | 32,213 psi | 50% | 2579 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 43,337 psi | 68% | 2736 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,866 psi | 52% | 2612 fps | 97.9% |
| Ramshot Grand | <<locked>> | 80% | 49,559 psi | 78% | 2959 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 80% | 44,846 psi | 70% | 2828 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,414 psi | 46% | 1808 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,467 psi | 67% | 2871 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,059 psi | 61% | 2762 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 80% | 54,099 psi | 85% | 2986 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 45,194 psi | 71% | 2838 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,751 psi | 84% | 2979 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,805 psi | 75% | 2831 fps | 100% |
| Vihtavuori N170 | <<locked>> | 84% | 47,065 psi | 74% | 2844 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 54,143 psi | 85% | 2949 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,432 psi | 84% | 3031 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 80% | 44,904 psi | 70% | 2848 fps | 98.9% |
| Vihtavuori N568 | <<locked>> | 80% | 39,943 psi | 63% | 2776 fps | 96.5% |
| Vihtavuori N570 | 86.8 gr | 84% | 44,077 psi | 69% | 2904 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,559 psi | 78% | 2949 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,415 psi | 79% | 2887 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 45 powders for 7 mm KM Katzmaier loaded with the .284 | 160gr | Prvi Partizan PSP BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,153 fps; across all powders the maximum-charge window runs from 1,975 fps to 3,153 fps. Accurate 8700 gives the best case fill at 100 %, and 45 of the 45 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 | Prvi Partizan PSP BT 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.