Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 160gr | Barnes Solid 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% | 55,492 psi | 87% | 2943 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 51,169 psi | 80% | 2976 fps | 97.6% |
| Accurate MAGPRO | <<locked>> | 84% | 55,666 psi | 87% | 3064 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 82% | 56,376 psi | 88% | 3031 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,230 psi | 87% | 3051 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 54,636 psi | 86% | 3035 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 55,187 psi | 86% | 3163 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 94% | 54,375 psi | 85% | 3058 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,970 psi | 88% | 3018 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,796 psi | 87% | 3045 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 54,259 psi | 85% | 2949 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,911 psi | 86% | 3025 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 57,319 psi | 90% | 3136 fps | 99.1% |
| Alliant Reloder-50 | <<locked>> | 98% | 57,609 psi | 90% | 3133 fps | 98.8% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,405 psi | 87% | 3009 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 55,230 psi | 87% | 3035 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,882 psi | 86% | 3048 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 55,796 psi | 87% | 3045 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,217 psi | 88% | 3054 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 54,128 psi | 85% | 2982 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,594 psi | 89% | 3022 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 54,462 psi | 85% | 3120 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,000 psi | 60% | 1962 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,450 psi | 90% | 2969 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 57,682 psi | 90% | 3015 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 84% | 57,522 psi | 90% | 3094 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 56,289 psi | 88% | 2963 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 98% | 57,188 psi | 90% | 3100 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 57,667 psi | 90% | 2972 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,839 psi | 86% | 3064 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,927 psi | 88% | 3054 fps | 100% |
| Ramshot Magnum | <<locked>> | 84% | 55,056 psi | 86% | 3002 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,001 psi | 61% | 2005 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 55,259 psi | 87% | 3100 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 54,404 psi | 85% | 3071 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 56,594 psi | 89% | 2999 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 55,840 psi | 88% | 3012 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,997 psi | 83% | 2986 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,477 psi | 87% | 3009 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,188 psi | 88% | 2979 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,173 psi | 88% | 2966 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,622 psi | 87% | 2999 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 82% | 55,912 psi | 88% | 2976 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,201 psi | 87% | 3061 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 88% | 56,652 psi | 89% | 3061 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 54,839 psi | 86% | 3074 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 92% | 56,289 psi | 88% | 3143 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 84% | 54,969 psi | 86% | 3038 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,971 psi | 89% | 2992 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% | 48,631 psi | 76% | 2835 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 44,092 psi | 69% | 2841 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 80% | 48,298 psi | 76% | 2933 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 80% | 52,736 psi | 83% | 2972 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 47,964 psi | 75% | 2923 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 80% | 35,824 psi | 56% | 2657 fps | 97.1% |
| ADI AR 2218 | 89.9 gr | 88% | 41,104 psi | 64% | 2861 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 80% | 33,214 psi | 52% | 2631 fps | 98.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,460 psi | 82% | 2963 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,718 psi | 76% | 2923 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,471 psi | 74% | 2844 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,713 psi | 65% | 2802 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 42,467 psi | 67% | 2854 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 90% | 42,743 psi | 67% | 2848 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,484 psi | 71% | 2825 fps | 96.9% |
| Bofors RP15 | <<locked>> | 80% | 45,310 psi | 71% | 2858 fps | 99.6% |
| Bofors RP30 | <<locked>> | 80% | 38,957 psi | 61% | 2743 fps | 98.1% |
| Bofors RP5 | <<locked>> | 80% | 48,718 psi | 76% | 2923 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 36,811 psi | 58% | 2684 fps | 98% |
| Hodgdon H4831 | <<locked>> | 80% | 44,454 psi | 70% | 2805 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,429 psi | 77% | 2900 fps | 99.3% |
| Hodgdon Retumbo | 77.1 gr | 80% | 40,770 psi | 64% | 2861 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,500 psi | 45% | 1755 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,853 psi | 84% | 2920 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,821 psi | 80% | 2897 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 80% | 49,966 psi | 78% | 2966 fps | 99.7% |
| IMR 7977 Enduron | <<locked>> | 88% | 52,765 psi | 83% | 2904 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 82% | 33,069 psi | 52% | 2612 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 41,901 psi | 66% | 2710 fps | 100% |
| Norma 217 | <<locked>> | 80% | 31,198 psi | 49% | 2572 fps | 97.2% |
| Norma MRP | <<locked>> | 80% | 52,098 psi | 82% | 2995 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 47,210 psi | 74% | 2874 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,312 psi | 46% | 1798 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 40,393 psi | 63% | 2835 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,231 psi | 58% | 2723 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 53,040 psi | 83% | 2940 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 52,243 psi | 82% | 2953 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 46,209 psi | 72% | 2861 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,895 psi | 81% | 2949 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 52,489 psi | 82% | 2920 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,166 psi | 72% | 2802 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 45,426 psi | 71% | 2808 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 52,373 psi | 82% | 2923 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,488 psi | 81% | 2999 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 80% | 43,236 psi | 68% | 2815 fps | 98.5% |
| Vihtavuori N568 | <<locked>> | 80% | 38,218 psi | 60% | 2740 fps | 95.8% |
| Vihtavuori N570 | 84 gr | 84% | 42,148 psi | 66% | 2864 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,427 psi | 74% | 2923 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 52,939 psi | 83% | 2930 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 | Barnes Solid. ADI AR 2218 delivers the highest muzzle velocity at 3,163 fps; across all powders the maximum-charge window runs from 1,962 fps to 3,163 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 1:9.0 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 | 160gr | Barnes Solid 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.