Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 160gr | Speer Deep Curl 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% | 54,389 psi | 85% | 2923 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 54,563 psi | 86% | 3028 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 82% | 57,290 psi | 90% | 3097 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 82% | 54,056 psi | 85% | 3028 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 53,824 psi | 84% | 3018 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 54,418 psi | 85% | 3143 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 94% | 57,740 psi | 90% | 3100 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 54,679 psi | 86% | 3025 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,666 psi | 89% | 2979 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 54,041 psi | 85% | 3009 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 56,681 psi | 89% | 3120 fps | 99.1% |
| Alliant Reloder-50 | <<locked>> | 96% | 57,087 psi | 89% | 3117 fps | 98.8% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 54,070 psi | 85% | 2986 fps | 98.9% |
| Bofors RP15 | <<locked>> | 84% | 54,317 psi | 85% | 3018 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 54,041 psi | 85% | 3035 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 54,679 psi | 86% | 3025 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 54,984 psi | 86% | 3035 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 56,246 psi | 88% | 3018 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,303 psi | 87% | 3002 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 86% | 53,751 psi | 84% | 3100 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,072 psi | 60% | 1975 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 56,130 psi | 88% | 2989 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 84% | 56,463 psi | 88% | 3074 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,911 psi | 86% | 2946 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 96% | 56,652 psi | 89% | 3087 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 56,608 psi | 89% | 2959 fps | 100% |
| Norma 217 | <<locked>> | 94% | 54,563 psi | 86% | 3051 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 54,027 psi | 85% | 3035 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 56,565 psi | 89% | 3022 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,204 psi | 61% | 2024 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 54,418 psi | 85% | 3081 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 53,534 psi | 84% | 3051 fps | 99.7% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 56,333 psi | 88% | 3041 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 84% | 55,056 psi | 86% | 2949 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 54,534 psi | 85% | 2982 fps | 97.6% |
| Vihtavuori N565 | <<locked>> | 86% | 55,724 psi | 87% | 3045 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 54,056 psi | 85% | 3058 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 90% | 55,608 psi | 87% | 3127 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 54,172 psi | 85% | 3018 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 54,418 psi | 85% | 2953 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% | 50,865 psi | 80% | 2867 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 43,758 psi | 69% | 2828 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 80% | 53,447 psi | 84% | 3031 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 50,256 psi | 79% | 2963 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 80% | 37,768 psi | 59% | 2703 fps | 97.9% |
| ADI AR 2218 | 91.7 gr | 86% | 40,393 psi | 63% | 2841 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 80% | 35,143 psi | 55% | 2677 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,995 psi | 80% | 2963 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,719 psi | 78% | 2874 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,903 psi | 69% | 2835 fps | 100% |
| Alliant Reloder-33 | 91.2 gr | 84% | 41,989 psi | 66% | 2838 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 88% | 42,482 psi | 67% | 2835 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,442 psi | 74% | 2864 fps | 97.6% |
| Bofors RP15 | <<locked>> | 80% | 47,572 psi | 75% | 2897 fps | 99.9% |
| Bofors RP30 | <<locked>> | 80% | 41,118 psi | 64% | 2785 fps | 98.7% |
| Bofors RP5 | <<locked>> | 80% | 50,995 psi | 80% | 2963 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 41,278 psi | 65% | 2782 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 80% | 52,576 psi | 82% | 2956 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,532 psi | 81% | 2940 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 80% | 43,207 psi | 68% | 2910 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,674 psi | 45% | 1772 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,663 psi | 83% | 2933 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 80% | 49,153 psi | 77% | 2949 fps | 99.7% |
| IMR 7977 Enduron | <<locked>> | 86% | 51,474 psi | 81% | 2884 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 80% | 32,677 psi | 51% | 2592 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 43,845 psi | 69% | 2746 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,359 psi | 52% | 2621 fps | 98.1% |
| Ramshot Grand | <<locked>> | 80% | 50,285 psi | 79% | 2972 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 45,310 psi | 71% | 2835 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,486 psi | 46% | 1814 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 43,134 psi | 68% | 2884 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,682 psi | 62% | 2772 fps | 97% |
| SNPE Vectan SP 13 | <<locked>> | 92% | 42,699 psi | 67% | 2782 fps | 95% |
| Vihtavuori N165 | <<locked>> | 80% | 48,269 psi | 76% | 2838 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 44,454 psi | 70% | 2789 fps | 95% |
| Vihtavuori N565 | <<locked>> | 80% | 45,382 psi | 71% | 2854 fps | 99% |
| Vihtavuori N568 | <<locked>> | 80% | 40,524 psi | 64% | 2789 fps | 96.8% |
| Vihtavuori N570 | 85.6 gr | 82% | 41,553 psi | 65% | 2844 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 50,430 psi | 79% | 2959 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,908 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 47 powders for 7 mm KM Katzmaier loaded with the .284 | 160gr | Speer Deep Curl Soft Point. ADI AR 2218 delivers the highest muzzle velocity at 3,143 fps; across all powders the maximum-charge window runs from 1,975 fps to 3,143 fps. Accurate 8700 gives the best case fill at 100 %, and 47 of the 47 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 Deep Curl Soft Point they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon 50BMG, Hodgdon US 869, Ramshot LRT burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.