Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 150gr | Norma Soft Point bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ADI AR 2218 and Vihtavuori N570.
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% | 55,985 psi | 88% | 3028 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 52,011 psi | 82% | 3058 fps | 97.4% |
| Accurate MAGPRO | <<locked>> | 82% | 55,129 psi | 86% | 3140 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 82% | 56,623 psi | 89% | 3117 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,622 psi | 87% | 3136 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 92% | 55,158 psi | 86% | 3120 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,043 psi | 88% | 3248 fps | 99% |
| ADI AR 2225 | <<locked>> | 94% | 55,071 psi | 86% | 3143 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,347 psi | 88% | 3107 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 56,188 psi | 88% | 3130 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 54,505 psi | 85% | 3031 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,347 psi | 87% | 3110 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 53,983 psi | 85% | 3153 fps | 98.3% |
| Alliant Reloder-50 | <<locked>> | 96% | 54,186 psi | 85% | 3143 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,825 psi | 87% | 3091 fps | 98.7% |
| Bofors RP15 | <<locked>> | 86% | 55,608 psi | 87% | 3120 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,259 psi | 87% | 3130 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 56,188 psi | 88% | 3130 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 56,550 psi | 89% | 3140 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 54,201 psi | 85% | 3061 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,971 psi | 89% | 3107 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 88% | 55,013 psi | 86% | 3209 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,942 psi | 59% | 2034 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 54,375 psi | 85% | 3038 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 84% | 54,157 psi | 85% | 3117 fps | 99.8% |
| IMR 7977 Enduron | <<locked>> | 90% | 56,666 psi | 89% | 3048 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 96% | 53,925 psi | 85% | 3123 fps | 99.9% |
| Lovex S071 | <<locked>> | 88% | 54,505 psi | 85% | 3005 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,521 psi | 87% | 3150 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,260 psi | 88% | 3143 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 55,622 psi | 87% | 3143 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 54,215 psi | 85% | 3064 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,044 psi | 61% | 2083 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 55,796 psi | 87% | 3186 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 55,085 psi | 86% | 3153 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 82% | 56,869 psi | 89% | 3087 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 56,115 psi | 88% | 3100 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 53,809 psi | 84% | 3068 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,753 psi | 87% | 3094 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,507 psi | 89% | 3068 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,666 psi | 89% | 3054 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,072 psi | 88% | 3081 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 56,086 psi | 88% | 3061 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,579 psi | 87% | 3146 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 57,217 psi | 90% | 3146 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 55,303 psi | 87% | 3156 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 92% | 57,058 psi | 89% | 3232 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 55,492 psi | 87% | 3123 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,275 psi | 88% | 3061 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% | 48,820 psi | 77% | 2917 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 44,773 psi | 70% | 2917 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 80% | 51,256 psi | 80% | 3071 fps | 99% |
| ADI AR 2209 | <<locked>> | 80% | 52,953 psi | 83% | 3058 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,254 psi | 76% | 3005 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 80% | 36,129 psi | 57% | 2733 fps | 96.7% |
| ADI AR 2218 | 96.5 gr | 90% | 44,614 psi | 70% | 3012 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 33,489 psi | 52% | 2700 fps | 98.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,634 psi | 82% | 3045 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,023 psi | 77% | 3005 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,790 psi | 75% | 2927 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,945 psi | 66% | 2877 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 42,960 psi | 67% | 2927 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 92% | 46,717 psi | 73% | 2999 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,788 psi | 72% | 2904 fps | 96.6% |
| Bofors RP15 | <<locked>> | 80% | 45,701 psi | 72% | 2936 fps | 99.4% |
| Bofors RP30 | <<locked>> | 80% | 39,146 psi | 61% | 2812 fps | 97.7% |
| Bofors RP5 | <<locked>> | 80% | 49,023 psi | 77% | 3005 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 39,305 psi | 62% | 2812 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 80% | 50,531 psi | 79% | 2995 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,705 psi | 78% | 2982 fps | 99% |
| Hodgdon Retumbo | 81 gr | 80% | 41,104 psi | 64% | 2940 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,485 psi | 45% | 1824 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,981 psi | 80% | 2979 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 80% | 47,108 psi | 74% | 2986 fps | 99.1% |
| IMR 7977 Enduron | <<locked>> | 88% | 53,098 psi | 83% | 2986 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 82% | 33,344 psi | 52% | 2677 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 42,192 psi | 66% | 2789 fps | 100% |
| Norma 217 | <<locked>> | 80% | 31,444 psi | 49% | 2641 fps | 96.7% |
| Norma MRP | <<locked>> | 80% | 52,446 psi | 82% | 3077 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,834 psi | 75% | 3005 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 80% | 43,236 psi | 68% | 2871 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,385 psi | 46% | 1870 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 40,843 psi | 64% | 2913 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,608 psi | 59% | 2795 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 53,272 psi | 83% | 3025 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 52,489 psi | 82% | 3038 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 46,847 psi | 73% | 2936 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,141 psi | 82% | 3035 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 52,779 psi | 83% | 3005 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,354 psi | 73% | 2881 fps | 99.8% |
| Vihtavuori N170 | <<locked>> | 86% | 48,950 psi | 77% | 2949 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 52,692 psi | 83% | 3009 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,822 psi | 81% | 3081 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 80% | 43,453 psi | 68% | 2890 fps | 98.2% |
| Vihtavuori N568 | <<locked>> | 80% | 38,595 psi | 60% | 2812 fps | 95.3% |
| Vihtavuori N570 | 90.3 gr | 86% | 45,745 psi | 72% | 3009 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,819 psi | 75% | 3005 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,008 psi | 77% | 2940 fps | 99.8% |
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 49 powders for 7 mm KM Katzmaier loaded with the .284 | 150gr | Norma Soft Point. ADI AR 2218 delivers the highest muzzle velocity at 3,248 fps; across all powders the maximum-charge window runs from 2,034 fps to 3,248 fps. Accurate 8700 gives the best case fill at 100 %, and 49 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:12.5 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. Hodgdon Retumbo, ADI AR 2218, Vihtavuori N570 rank at the top here: for 7 mm KM Katzmaier with the .284 | 150gr | Norma Soft Point 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.