Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 160gr | Speer TBBC 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, Vihtavuori N570 and Alliant Reloder-33.
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% | 56,782 psi | 89% | 2959 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,011 psi | 83% | 3005 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 82% | 55,956 psi | 88% | 3074 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 82% | 57,493 psi | 90% | 3048 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 56,507 psi | 89% | 3071 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,231 psi | 88% | 3058 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,942 psi | 89% | 3189 fps | 99.4% |
| ADI AR 2225 | <<locked>> | 94% | 56,028 psi | 88% | 3077 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,188 psi | 90% | 3038 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,072 psi | 89% | 3064 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 55,622 psi | 87% | 2966 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 56,420 psi | 88% | 3045 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 54,955 psi | 86% | 3094 fps | 98.8% |
| Alliant Reloder-50 | <<locked>> | 96% | 55,347 psi | 87% | 3091 fps | 98.5% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,652 psi | 89% | 3031 fps | 99.1% |
| Bofors RP15 | <<locked>> | 86% | 56,666 psi | 89% | 3058 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,260 psi | 88% | 3071 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,072 psi | 89% | 3064 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 57,667 psi | 90% | 3074 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,114 psi | 86% | 2999 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 82% | 54,186 psi | 85% | 2982 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,130 psi | 88% | 3140 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,000 psi | 60% | 1969 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,100 psi | 86% | 2972 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 84% | 55,245 psi | 87% | 3058 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 57,580 psi | 90% | 2986 fps | 96.7% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,158 psi | 86% | 3068 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 55,448 psi | 87% | 2940 fps | 100% |
| Norma 217 | <<locked>> | 96% | 56,695 psi | 89% | 3087 fps | 100% |
| Norma MRP | <<locked>> | 82% | 57,450 psi | 90% | 3077 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 56,710 psi | 89% | 3081 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 55,259 psi | 87% | 3002 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,146 psi | 61% | 2014 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,000 psi | 89% | 3123 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,144 psi | 88% | 3097 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 82% | 57,609 psi | 90% | 3015 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 57,145 psi | 90% | 3035 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 3015 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 56,782 psi | 89% | 3028 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 57,406 psi | 90% | 2999 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 57,522 psi | 90% | 2986 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,145 psi | 90% | 3025 fps | 98% |
| Vihtavuori N555 | <<locked>> | 82% | 57,101 psi | 89% | 2992 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 56,666 psi | 89% | 3087 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 86% | 54,418 psi | 85% | 3022 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 56,362 psi | 88% | 3097 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 90% | 54,143 psi | 85% | 3104 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 56,739 psi | 89% | 3058 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,116 psi | 90% | 2995 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% | 49,705 psi | 78% | 2851 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 42,293 psi | 66% | 2802 fps | 95.2% |
| Accurate MAGPRO | <<locked>> | 80% | 52,301 psi | 82% | 3012 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 80% | 53,867 psi | 84% | 2992 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 49,240 psi | 77% | 2946 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 80% | 36,883 psi | 58% | 2684 fps | 97.6% |
| ADI AR 2218 | 91.9 gr | 88% | 42,308 psi | 66% | 2890 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 80% | 34,142 psi | 54% | 2654 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 80% | 53,548 psi | 84% | 2979 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,980 psi | 78% | 2946 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 48,646 psi | 76% | 2861 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,873 psi | 67% | 2818 fps | 100% |
| Alliant Reloder-33 | 89.3 gr | 84% | 40,698 psi | 64% | 2812 fps | 95.1% |
| Alliant Reloder-50 | <<locked>> | 90% | 44,237 psi | 69% | 2877 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,572 psi | 73% | 2848 fps | 97.3% |
| Bofors RP15 | <<locked>> | 80% | 46,557 psi | 73% | 2881 fps | 99.8% |
| Bofors RP30 | <<locked>> | 80% | 40,016 psi | 63% | 2762 fps | 98.4% |
| Bofors RP5 | <<locked>> | 80% | 49,980 psi | 78% | 2946 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 40,205 psi | 63% | 2762 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 80% | 51,474 psi | 81% | 2936 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,618 psi | 79% | 2923 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 80% | 41,959 psi | 66% | 2884 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,572 psi | 45% | 1762 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,764 psi | 81% | 2917 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 80% | 48,109 psi | 75% | 2933 fps | 99.5% |
| IMR 7977 Enduron | <<locked>> | 86% | 50,575 psi | 79% | 2867 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 80% | 31,778 psi | 50% | 2569 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 43,004 psi | 67% | 2733 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,271 psi | 51% | 2598 fps | 97.7% |
| Norma MRP | <<locked>> | 80% | 53,461 psi | 84% | 3015 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 48,834 psi | 77% | 2946 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 80% | 44,193 psi | 69% | 2815 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,370 psi | 46% | 1804 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 41,800 psi | 66% | 2861 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,493 psi | 60% | 2749 fps | 96.6% |
| Rottweil R 904 | <<locked>> | 80% | 54,085 psi | 85% | 2959 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 53,417 psi | 84% | 2972 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 44,425 psi | 70% | 2822 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,055 psi | 83% | 2969 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 53,737 psi | 84% | 2940 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,181 psi | 74% | 2818 fps | 100% |
| Vihtavuori N170 | <<locked>> | 84% | 46,543 psi | 73% | 2831 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 53,592 psi | 84% | 2940 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 52,794 psi | 83% | 3018 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 80% | 44,425 psi | 70% | 2838 fps | 98.8% |
| Vihtavuori N568 | <<locked>> | 80% | 39,479 psi | 62% | 2766 fps | 96.3% |
| Vihtavuori N570 | 85.9 gr | 84% | 43,482 psi | 68% | 2890 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 48,965 psi | 77% | 2943 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,806 psi | 78% | 2877 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 49 powders for 7 mm KM Katzmaier loaded with the .284 | 160gr | Speer TBBC. ADI AR 2218 delivers the highest muzzle velocity at 3,189 fps; across all powders the maximum-charge window runs from 1,969 fps to 3,189 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 1:10.5 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, Alliant Reloder-33 rank at the top here: for 7 mm KM Katzmaier with the .284 | 160gr | Speer TBBC 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.