Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 154gr | 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% | 56,318 psi | 88% | 3002 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 52,460 psi | 82% | 3038 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 82% | 55,564 psi | 87% | 3117 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 57,116 psi | 90% | 3091 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,985 psi | 88% | 3110 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 55,695 psi | 87% | 3097 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,434 psi | 88% | 3225 fps | 99.2% |
| ADI AR 2225 | <<locked>> | 94% | 55,521 psi | 87% | 3117 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,652 psi | 89% | 3077 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 56,565 psi | 89% | 3104 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 54,984 psi | 86% | 3009 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,811 psi | 87% | 3084 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 54,317 psi | 85% | 3127 fps | 98.5% |
| Alliant Reloder-50 | <<locked>> | 96% | 54,795 psi | 86% | 3127 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,260 psi | 88% | 3071 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 56,173 psi | 88% | 3097 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,767 psi | 87% | 3110 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 56,565 psi | 89% | 3104 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 57,072 psi | 89% | 3114 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 54,520 psi | 85% | 3035 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 57,348 psi | 90% | 3084 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 55,579 psi | 87% | 3182 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,058 psi | 60% | 2008 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 54,766 psi | 86% | 3015 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 84% | 54,752 psi | 86% | 3094 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 90% | 57,029 psi | 89% | 3022 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 96% | 54,505 psi | 85% | 3100 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 54,839 psi | 86% | 2979 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,999 psi | 88% | 3123 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,855 psi | 89% | 3117 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 56,101 psi | 88% | 3120 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 54,534 psi | 85% | 3038 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,015 psi | 61% | 2054 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 56,463 psi | 88% | 3163 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 55,535 psi | 87% | 3133 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 57,290 psi | 90% | 3058 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 56,608 psi | 89% | 3074 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 54,172 psi | 85% | 3045 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 56,246 psi | 88% | 3068 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,797 psi | 89% | 3038 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 57,029 psi | 89% | 3025 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,579 psi | 89% | 3058 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 82% | 56,550 psi | 89% | 3035 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 56,144 psi | 88% | 3123 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 88% | 57,696 psi | 90% | 3120 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 55,927 psi | 88% | 3136 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 92% | 57,522 psi | 90% | 3209 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 84% | 56,057 psi | 88% | 3100 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,637 psi | 89% | 3035 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% | 49,226 psi | 77% | 2887 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 45,078 psi | 71% | 2897 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 80% | 51,634 psi | 81% | 3045 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 80% | 53,388 psi | 84% | 3031 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,689 psi | 76% | 2982 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 80% | 36,492 psi | 57% | 2713 fps | 97.1% |
| ADI AR 2218 | 93.4 gr | 88% | 41,814 psi | 66% | 2917 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 80% | 33,852 psi | 53% | 2684 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 80% | 53,069 psi | 83% | 3018 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,487 psi | 78% | 2982 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 48,196 psi | 76% | 2900 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,380 psi | 66% | 2854 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 43,453 psi | 68% | 2910 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 90% | 43,743 psi | 69% | 2907 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,064 psi | 72% | 2881 fps | 96.9% |
| Bofors RP15 | <<locked>> | 80% | 46,093 psi | 72% | 2917 fps | 99.6% |
| Bofors RP30 | <<locked>> | 80% | 39,537 psi | 62% | 2795 fps | 98% |
| Bofors RP5 | <<locked>> | 80% | 49,487 psi | 78% | 2982 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 39,711 psi | 62% | 2792 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 80% | 50,952 psi | 80% | 2972 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,111 psi | 79% | 2959 fps | 99.2% |
| Hodgdon Retumbo | 80.2 gr | 80% | 41,553 psi | 65% | 2917 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,616 psi | 45% | 1801 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,358 psi | 80% | 2956 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 80% | 47,572 psi | 75% | 2966 fps | 99.3% |
| IMR 7977 Enduron | <<locked>> | 88% | 53,432 psi | 84% | 2959 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 82% | 33,634 psi | 53% | 2661 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 42,525 psi | 67% | 2766 fps | 100% |
| Norma 217 | <<locked>> | 80% | 31,821 psi | 50% | 2625 fps | 97.2% |
| Norma MRP | <<locked>> | 80% | 52,982 psi | 83% | 3054 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 48,356 psi | 76% | 2986 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 80% | 43,584 psi | 68% | 2848 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,399 psi | 46% | 1844 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 41,263 psi | 65% | 2890 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,985 psi | 60% | 2776 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 53,664 psi | 84% | 2999 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 52,895 psi | 83% | 3012 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 47,094 psi | 74% | 2917 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,547 psi | 82% | 3009 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 53,243 psi | 83% | 2982 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,731 psi | 73% | 2858 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 46,064 psi | 72% | 2867 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 53,084 psi | 83% | 2982 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 52,315 psi | 82% | 3058 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 80% | 43,903 psi | 69% | 2867 fps | 98.4% |
| Vihtavuori N568 | <<locked>> | 80% | 38,914 psi | 61% | 2792 fps | 95.7% |
| Vihtavuori N570 | 87.3 gr | 84% | 42,931 psi | 67% | 2920 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 48,254 psi | 76% | 2979 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,298 psi | 77% | 2913 fps | 99.9% |
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 | 154gr | Norma Soft Point. ADI AR 2218 delivers the highest muzzle velocity at 3,225 fps; across all powders the maximum-charge window runs from 2,008 fps to 3,225 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 154.0 gr projectile in 0.284" calls for a 1:12.0 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. Hodgdon Retumbo, ADI AR 2218, Vihtavuori N570 rank at the top here: for 7 mm KM Katzmaier with the .284 | 154gr | Norma Soft Point they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon 50BMG, Hodgdon US 869, Lovex D100 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.