Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 160gr | Sierra Tipped MatchKing bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Hodgdon Retumbo 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% | 56,507 psi | 89% | 2956 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 2999 fps | 98% |
| Accurate MAGPRO | <<locked>> | 82% | 55,535 psi | 87% | 3068 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 57,217 psi | 90% | 3045 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 56,043 psi | 88% | 3064 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 55,811 psi | 87% | 3051 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,391 psi | 88% | 3182 fps | 99.3% |
| ADI AR 2225 | <<locked>> | 94% | 55,579 psi | 87% | 3074 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,768 psi | 89% | 3031 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 56,637 psi | 89% | 3058 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 55,129 psi | 86% | 2963 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,970 psi | 88% | 3038 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 54,389 psi | 85% | 3087 fps | 98.7% |
| Alliant Reloder-50 | <<locked>> | 96% | 54,636 psi | 86% | 3081 fps | 98.4% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,159 psi | 88% | 3022 fps | 99.1% |
| Bofors RP15 | <<locked>> | 86% | 56,217 psi | 88% | 3051 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,840 psi | 88% | 3064 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 56,637 psi | 89% | 3058 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 56,985 psi | 89% | 3064 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 54,679 psi | 86% | 2992 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 57,377 psi | 90% | 3035 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 55,637 psi | 87% | 3136 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,043 psi | 60% | 1969 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 54,868 psi | 86% | 2969 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 84% | 54,795 psi | 86% | 3051 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 57,072 psi | 89% | 2979 fps | 96.5% |
| IMR 8133 Enduron | <<locked>> | 96% | 54,563 psi | 86% | 3058 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 54,998 psi | 86% | 2936 fps | 100% |
| Norma 217 | <<locked>> | 96% | 56,057 psi | 88% | 3081 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,985 psi | 89% | 3071 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 56,231 psi | 88% | 3074 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 54,650 psi | 86% | 2995 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,044 psi | 61% | 2011 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 56,536 psi | 89% | 3120 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 55,535 psi | 87% | 3091 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 82% | 57,392 psi | 90% | 3015 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 56,710 psi | 89% | 3025 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 54,099 psi | 85% | 3005 fps | 97.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 56,347 psi | 88% | 3025 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,985 psi | 89% | 2992 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 57,116 psi | 90% | 2979 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,608 psi | 89% | 3018 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 82% | 56,637 psi | 89% | 2989 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 56,231 psi | 88% | 3081 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 86% | 54,027 psi | 85% | 3018 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 55,970 psi | 88% | 3094 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 92% | 57,435 psi | 90% | 3163 fps | 98.9% |
| Winchester StaBALL HD | <<locked>> | 84% | 56,231 psi | 88% | 3054 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,710 psi | 89% | 2989 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% | 49,429 psi | 77% | 2848 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 41,974 psi | 66% | 2795 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 80% | 51,866 psi | 81% | 3005 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 80% | 53,403 psi | 84% | 2986 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,805 psi | 76% | 2940 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 80% | 36,521 psi | 57% | 2677 fps | 97.4% |
| ADI AR 2218 | 91.2 gr | 88% | 41,829 psi | 66% | 2881 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 33,910 psi | 53% | 2651 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 80% | 53,272 psi | 83% | 2976 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,559 psi | 78% | 2940 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 48,327 psi | 76% | 2858 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,409 psi | 66% | 2812 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 43,482 psi | 68% | 2874 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 90% | 43,700 psi | 68% | 2867 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,224 psi | 72% | 2841 fps | 97.2% |
| Bofors RP15 | <<locked>> | 80% | 46,137 psi | 72% | 2874 fps | 99.7% |
| Bofors RP30 | <<locked>> | 80% | 39,740 psi | 62% | 2759 fps | 98.3% |
| Bofors RP5 | <<locked>> | 80% | 49,559 psi | 78% | 2940 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 39,798 psi | 62% | 2753 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 80% | 51,082 psi | 80% | 2930 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,212 psi | 79% | 2917 fps | 99.4% |
| Hodgdon Retumbo | 78.3 gr | 80% | 41,655 psi | 65% | 2881 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,543 psi | 45% | 1762 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,372 psi | 81% | 2910 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 80% | 47,674 psi | 75% | 2923 fps | 99.5% |
| IMR 7977 Enduron | <<locked>> | 88% | 53,534 psi | 84% | 2920 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 80% | 31,517 psi | 49% | 2566 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 42,554 psi | 67% | 2723 fps | 100% |
| Norma 217 | <<locked>> | 80% | 31,995 psi | 50% | 2592 fps | 97.6% |
| Norma MRP | <<locked>> | 80% | 52,982 psi | 83% | 3009 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 48,544 psi | 76% | 2946 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 80% | 43,772 psi | 69% | 2808 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,341 psi | 46% | 1801 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 41,365 psi | 65% | 2854 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,116 psi | 60% | 2746 fps | 96.4% |
| Rottweil R 904 | <<locked>> | 80% | 53,824 psi | 84% | 2956 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 53,113 psi | 83% | 2969 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 44,106 psi | 69% | 2818 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,765 psi | 83% | 2966 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 53,301 psi | 84% | 2936 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,949 psi | 74% | 2815 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 46,209 psi | 72% | 2828 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 80% | 53,113 psi | 83% | 2936 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 52,344 psi | 82% | 3012 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 80% | 44,048 psi | 69% | 2831 fps | 98.7% |
| Vihtavuori N568 | <<locked>> | 80% | 39,102 psi | 61% | 2759 fps | 96.2% |
| Vihtavuori N570 | 85.3 gr | 84% | 43,076 psi | 68% | 2884 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 48,428 psi | 76% | 2936 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,400 psi | 77% | 2871 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 | 160gr | Sierra Tipped MatchKing. ADI AR 2218 delivers the highest muzzle velocity at 3,182 fps; across all powders the maximum-charge window runs from 1,969 fps to 3,182 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 160.0 gr projectile in 0.284" calls for a 1:10.0 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. ADI AR 2218, Hodgdon Retumbo, Vihtavuori N570 rank at the top here: for 7 mm KM Katzmaier with the .284 | 160gr | Sierra Tipped MatchKing 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.