Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 160gr | Speer Magnum Tip Soft Point bullet and 40 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>> | 82% | 54,433 psi | 85% | 2927 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 54,795 psi | 86% | 3035 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 82% | 57,508 psi | 90% | 3100 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 82% | 54,085 psi | 85% | 3028 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 53,853 psi | 84% | 3018 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 54,636 psi | 86% | 3150 fps | 99.2% |
| ADI AR 2225 | <<locked>> | 92% | 53,925 psi | 85% | 3045 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 54,752 psi | 86% | 3025 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,898 psi | 89% | 2982 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 54,085 psi | 85% | 3009 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 56,710 psi | 89% | 3120 fps | 99.1% |
| Alliant Reloder-50 | <<locked>> | 96% | 57,276 psi | 90% | 3120 fps | 98.9% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 54,259 psi | 85% | 2992 fps | 98.9% |
| Bofors RP15 | <<locked>> | 84% | 54,389 psi | 85% | 3018 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 54,085 psi | 85% | 3031 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 54,752 psi | 86% | 3025 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 55,201 psi | 87% | 3035 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 56,260 psi | 88% | 3018 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,332 psi | 87% | 3002 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 86% | 53,998 psi | 85% | 3104 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,145 psi | 60% | 1978 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 56,173 psi | 88% | 2992 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 84% | 56,739 psi | 89% | 3077 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,955 psi | 86% | 2946 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 96% | 56,666 psi | 89% | 3087 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 56,666 psi | 89% | 2959 fps | 100% |
| Norma 217 | <<locked>> | 94% | 54,592 psi | 86% | 3054 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 54,273 psi | 85% | 3038 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 56,811 psi | 89% | 3025 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,131 psi | 61% | 2021 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 54,636 psi | 86% | 3084 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 53,737 psi | 84% | 3054 fps | 99.7% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 56,362 psi | 88% | 3038 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 84% | 55,114 psi | 86% | 2949 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 54,578 psi | 86% | 2982 fps | 97.6% |
| Vihtavuori N565 | <<locked>> | 86% | 55,753 psi | 87% | 3045 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 54,085 psi | 85% | 3058 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 90% | 55,651 psi | 87% | 3127 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 54,462 psi | 85% | 3022 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 54,636 psi | 86% | 2956 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% | 50,937 psi | 80% | 2871 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 43,787 psi | 69% | 2831 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 80% | 53,505 psi | 84% | 3031 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 50,488 psi | 79% | 2966 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 80% | 37,826 psi | 59% | 2707 fps | 98% |
| ADI AR 2218 | 91.8 gr | 86% | 40,437 psi | 63% | 2844 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 80% | 35,172 psi | 55% | 2677 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 51,213 psi | 80% | 2966 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,763 psi | 78% | 2874 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 44,121 psi | 69% | 2841 fps | 100% |
| Alliant Reloder-33 | 91.3 gr | 84% | 42,018 psi | 66% | 2835 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 88% | 42,511 psi | 67% | 2835 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,471 psi | 74% | 2864 fps | 97.6% |
| Bofors RP15 | <<locked>> | 80% | 47,601 psi | 75% | 2897 fps | 99.9% |
| Bofors RP30 | <<locked>> | 80% | 41,162 psi | 65% | 2785 fps | 98.7% |
| Bofors RP5 | <<locked>> | 80% | 51,213 psi | 80% | 2966 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 41,321 psi | 65% | 2785 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 80% | 52,634 psi | 82% | 2956 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,750 psi | 81% | 2943 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 80% | 43,265 psi | 68% | 2910 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,631 psi | 45% | 1772 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,866 psi | 83% | 2936 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 80% | 49,211 psi | 77% | 2953 fps | 99.7% |
| IMR 7977 Enduron | <<locked>> | 86% | 51,663 psi | 81% | 2887 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 80% | 32,735 psi | 51% | 2592 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 43,888 psi | 69% | 2749 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,417 psi | 52% | 2625 fps | 98.2% |
| Ramshot Grand | <<locked>> | 80% | 50,328 psi | 79% | 2972 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 45,353 psi | 71% | 2838 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,428 psi | 46% | 1811 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 43,207 psi | 68% | 2884 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,740 psi | 62% | 2776 fps | 97.1% |
| SNPE Vectan SP 13 | <<locked>> | 92% | 42,757 psi | 67% | 2785 fps | 95% |
| Vihtavuori N165 | <<locked>> | 80% | 48,298 psi | 76% | 2838 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 44,628 psi | 70% | 2795 fps | 95% |
| Vihtavuori N565 | <<locked>> | 80% | 45,556 psi | 71% | 2858 fps | 99% |
| Vihtavuori N568 | <<locked>> | 80% | 40,596 psi | 64% | 2792 fps | 96.8% |
| Vihtavuori N570 | 85.8 gr | 82% | 41,756 psi | 65% | 2848 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 50,488 psi | 79% | 2959 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,923 psi | 80% | 2897 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 40 powders for 7 mm KM Katzmaier loaded with the .284 | 160gr | Speer Magnum Tip Soft Point. ADI AR 2218 delivers the highest muzzle velocity at 3,150 fps; across all powders the maximum-charge window runs from 1,978 fps to 3,150 fps. Accurate 8700 gives the best case fill at 100 %, and 40 of the 40 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 1:12.5 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 Magnum Tip Soft Point 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.