Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 154gr | Hornady SP 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% | 2995 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 51,808 psi | 81% | 3025 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 82% | 55,056 psi | 86% | 3107 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 56,753 psi | 89% | 3087 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,651 psi | 87% | 3104 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 92% | 55,172 psi | 86% | 3087 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 55,941 psi | 88% | 3215 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 94% | 54,984 psi | 86% | 3110 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,304 psi | 88% | 3071 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 56,231 psi | 88% | 3097 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 54,636 psi | 86% | 3002 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,434 psi | 87% | 3081 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 53,838 psi | 84% | 3120 fps | 98.4% |
| Alliant Reloder-50 | <<locked>> | 96% | 54,143 psi | 85% | 3114 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,840 psi | 88% | 3061 fps | 98.8% |
| Bofors RP15 | <<locked>> | 86% | 55,825 psi | 87% | 3091 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,230 psi | 87% | 3100 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 56,231 psi | 88% | 3097 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 56,579 psi | 89% | 3107 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 54,201 psi | 85% | 3031 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 57,029 psi | 89% | 3077 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 88% | 54,969 psi | 86% | 3173 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,043 psi | 60% | 2008 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 54,462 psi | 85% | 3009 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 84% | 54,360 psi | 85% | 3091 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 90% | 56,782 psi | 89% | 3018 fps | 96.1% |
| IMR 8133 Enduron | <<locked>> | 96% | 54,012 psi | 85% | 3094 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 54,491 psi | 85% | 2976 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,463 psi | 87% | 3117 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,318 psi | 88% | 3110 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 55,695 psi | 87% | 3114 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 54,215 psi | 85% | 3035 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,015 psi | 61% | 2051 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 55,898 psi | 88% | 3156 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 55,085 psi | 86% | 3127 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 57,000 psi | 89% | 3054 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 56,246 psi | 88% | 3068 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 53,708 psi | 84% | 3038 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,883 psi | 88% | 3064 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,463 psi | 88% | 3031 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,724 psi | 89% | 3022 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,144 psi | 88% | 3054 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 82% | 56,202 psi | 88% | 3031 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,622 psi | 87% | 3117 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 57,188 psi | 90% | 3114 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 55,390 psi | 87% | 3130 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 92% | 56,985 psi | 89% | 3199 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 55,622 psi | 87% | 3094 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,304 psi | 88% | 3028 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% | 48,863 psi | 77% | 2884 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 44,672 psi | 70% | 2890 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 80% | 51,285 psi | 80% | 3038 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 80% | 53,026 psi | 83% | 3025 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,385 psi | 76% | 2976 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 80% | 36,216 psi | 57% | 2707 fps | 96.9% |
| ADI AR 2218 | 95 gr | 90% | 44,744 psi | 70% | 2986 fps | 96.3% |
| ADI AR 2225 | <<locked>> | 80% | 33,547 psi | 53% | 2677 fps | 98.7% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,721 psi | 83% | 3015 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,139 psi | 77% | 2976 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,805 psi | 75% | 2894 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,018 psi | 66% | 2848 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 43,018 psi | 67% | 2904 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 90% | 43,294 psi | 68% | 2897 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,788 psi | 72% | 2874 fps | 96.8% |
| Bofors RP15 | <<locked>> | 80% | 45,759 psi | 72% | 2910 fps | 99.5% |
| Bofors RP30 | <<locked>> | 80% | 39,204 psi | 61% | 2785 fps | 97.9% |
| Bofors RP5 | <<locked>> | 80% | 49,139 psi | 77% | 2976 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 39,392 psi | 62% | 2785 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 80% | 50,662 psi | 79% | 2966 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,777 psi | 78% | 2953 fps | 99.2% |
| Hodgdon Retumbo | 79.7 gr | 80% | 41,176 psi | 65% | 2910 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,558 psi | 45% | 1798 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,039 psi | 80% | 2949 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 80% | 47,210 psi | 74% | 2959 fps | 99.2% |
| IMR 7977 Enduron | <<locked>> | 88% | 53,156 psi | 83% | 2956 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 82% | 33,315 psi | 52% | 2651 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 42,163 psi | 66% | 2759 fps | 100% |
| Norma 217 | <<locked>> | 80% | 31,517 psi | 49% | 2615 fps | 97% |
| Norma MRP | <<locked>> | 80% | 52,605 psi | 82% | 3051 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,979 psi | 75% | 2979 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 80% | 43,265 psi | 68% | 2841 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,341 psi | 46% | 1841 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 40,901 psi | 64% | 2887 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,681 psi | 59% | 2769 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 53,316 psi | 84% | 2995 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 52,562 psi | 82% | 3009 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 46,673 psi | 73% | 2907 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,214 psi | 82% | 3002 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 52,895 psi | 83% | 2976 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,427 psi | 73% | 2851 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 86% | 49,081 psi | 77% | 2923 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 80% | 52,721 psi | 83% | 2976 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,982 psi | 81% | 3051 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 80% | 43,584 psi | 68% | 2864 fps | 98.3% |
| Vihtavuori N568 | <<locked>> | 80% | 38,624 psi | 61% | 2789 fps | 95.6% |
| Vihtavuori N570 | 88.9 gr | 86% | 45,876 psi | 72% | 2986 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,819 psi | 75% | 2972 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,979 psi | 77% | 2910 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 49 powders for 7 mm KM Katzmaier loaded with the .284 | 154gr | Hornady SP. ADI AR 2218 delivers the highest muzzle velocity at 3,215 fps; across all powders the maximum-charge window runs from 2,008 fps to 3,215 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 60–90 %, leaving at least 10 % headroom. The 154.0 gr projectile in 0.284" calls for a 1:11.0 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 | 154gr | Hornady SP 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.