Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 170gr | Rhino Solid Shank bullet and 42 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-50.
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>> | 82% | 55,448 psi | 87% | 2864 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 56,014 psi | 88% | 2986 fps | 99% |
| ADI AR 2213 | <<locked>> | 82% | 55,201 psi | 87% | 2972 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 55,129 psi | 86% | 2963 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 55,695 psi | 87% | 3097 fps | 99.6% |
| ADI AR 2225 | <<locked>> | 92% | 55,245 psi | 87% | 2986 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 55,825 psi | 87% | 2966 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 54,201 psi | 85% | 2867 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 55,187 psi | 86% | 2946 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 53,882 psi | 84% | 3005 fps | 99.1% |
| Alliant Reloder-50 | <<locked>> | 94% | 54,273 psi | 85% | 3002 fps | 98.8% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 55,056 psi | 86% | 2933 fps | 99.3% |
| Bofors RP15 | <<locked>> | 84% | 55,259 psi | 87% | 2956 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 55,245 psi | 87% | 2976 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 55,825 psi | 87% | 2966 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 56,318 psi | 88% | 2976 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 57,305 psi | 90% | 2959 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 56,347 psi | 88% | 2943 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 55,317 psi | 87% | 3045 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,189 psi | 60% | 1916 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 57,043 psi | 89% | 2930 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 53,867 psi | 84% | 2956 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 55,854 psi | 88% | 2894 fps | 97% |
| IMR 8133 Enduron | <<locked>> | 94% | 54,143 psi | 85% | 2976 fps | 100% |
| Lovex D100 | <<locked>> | 92% | 57,464 psi | 90% | 2946 fps | 96.4% |
| Lovex S071 | <<locked>> | 86% | 54,143 psi | 85% | 2844 fps | 100% |
| Norma 217 | <<locked>> | 94% | 55,753 psi | 87% | 2995 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 55,405 psi | 87% | 2979 fps | 100% |
| Ramshot Magnum | <<locked>> | 84% | 53,824 psi | 84% | 2904 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,218 psi | 61% | 1962 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 55,869 psi | 88% | 3025 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 54,984 psi | 86% | 3002 fps | 99.9% |
| Shooters World 50 BMG | <<locked>> | 92% | 57,464 psi | 90% | 2946 fps | 96.4% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 2989 fps | 98.9% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 50,908 psi | 80% | 2897 fps | 96.4% |
| Vihtavuori N165 | <<locked>> | 84% | 55,985 psi | 88% | 2890 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 55,593 psi | 87% | 2930 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 86% | 56,913 psi | 89% | 2989 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 55,332 psi | 87% | 3005 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 90% | 56,826 psi | 89% | 3074 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 82% | 55,724 psi | 87% | 2959 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 55,506 psi | 87% | 2894 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% | 51,793 psi | 81% | 2808 fps | 100% |
| Accurate 8700 | <<locked>> | 92% | 41,669 psi | 65% | 2723 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 80% | 51,430 psi | 81% | 2910 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 80% | 38,754 psi | 61% | 2661 fps | 98.7% |
| ADI AR 2218 | 87.6 gr | 84% | 38,450 psi | 60% | 2733 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 36,129 psi | 57% | 2638 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 52,156 psi | 82% | 2907 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 50,792 psi | 80% | 2815 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 45,034 psi | 71% | 2782 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 82% | 39,987 psi | 63% | 2726 fps | 95.6% |
| Alliant Reloder-50 | 91.1 gr | 86% | 40,495 psi | 63% | 2730 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 48,385 psi | 76% | 2815 fps | 98.3% |
| Bofors RP15 | <<locked>> | 80% | 48,602 psi | 76% | 2844 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 42,047 psi | 66% | 2740 fps | 99.2% |
| Bofors RP5 | <<locked>> | 80% | 52,156 psi | 82% | 2907 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 42,235 psi | 66% | 2736 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 80% | 53,548 psi | 84% | 2900 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 52,649 psi | 83% | 2884 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 80% | 44,483 psi | 70% | 2861 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,732 psi | 45% | 1716 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 53,606 psi | 84% | 2877 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 80% | 50,357 psi | 79% | 2897 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 84% | 49,052 psi | 77% | 2772 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 80% | 33,591 psi | 53% | 2556 fps | 96.8% |
| Lovex D100 | <<locked>> | 90% | 53,534 psi | 84% | 2884 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 44,846 psi | 70% | 2694 fps | 100% |
| Norma 217 | <<locked>> | 80% | 34,243 psi | 54% | 2582 fps | 98.9% |
| Ramshot Grand | <<locked>> | 80% | 51,329 psi | 80% | 2917 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 46,470 psi | 73% | 2785 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,559 psi | 46% | 1759 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 44,338 psi | 69% | 2838 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 40,727 psi | 64% | 2733 fps | 97.9% |
| Shooters World 50 BMG | <<locked>> | 90% | 53,534 psi | 84% | 2884 fps | 95.4% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 40,756 psi | 64% | 2680 fps | 95% |
| Vihtavuori 20N29 | <<locked>> | 98% | 47,311 psi | 74% | 2831 fps | 95.4% |
| Vihtavuori N165 | <<locked>> | 80% | 49,124 psi | 77% | 2782 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 45,455 psi | 71% | 2746 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 80% | 46,528 psi | 73% | 2808 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 80% | 41,597 psi | 65% | 2749 fps | 97.7% |
| Vihtavuori N570 | 81.7 gr | 80% | 39,653 psi | 62% | 2736 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 51,808 psi | 81% | 2904 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 51,851 psi | 81% | 2838 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 42 powders for 7 mm KM Katzmaier loaded with the .284 | 170gr | Rhino Solid Shank. ADI AR 2218 delivers the highest muzzle velocity at 3,097 fps; across all powders the maximum-charge window runs from 1,916 fps to 3,097 fps. Accurate 8700 gives the best case fill at 100 %, and 42 of the 42 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 170.0 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. ADI AR 2218, Vihtavuori N570, Alliant Reloder-50 rank at the top here: for 7 mm KM Katzmaier with the .284 | 170gr | Rhino Solid Shank 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.