Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 185gr | Nosler RDF bullet and 41 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 IMR 8133 Enduron.
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% | 57,145 psi | 90% | 2779 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 54,056 psi | 85% | 2858 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 82% | 57,014 psi | 89% | 2894 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 57,087 psi | 89% | 2887 fps | 100% |
| ADI AR 2218 | <<locked>> | 92% | 53,911 psi | 84% | 2966 fps | 99.7% |
| ADI AR 2225 | <<locked>> | 92% | 57,319 psi | 90% | 2907 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 57,653 psi | 90% | 2884 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 56,028 psi | 88% | 2782 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 57,305 psi | 90% | 2867 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 56,014 psi | 88% | 2940 fps | 99.7% |
| Alliant Reloder-50 | <<locked>> | 94% | 56,681 psi | 89% | 2943 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 56,724 psi | 89% | 2858 fps | 99.8% |
| Bofors RP15 | <<locked>> | 84% | 57,246 psi | 90% | 2877 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 57,130 psi | 90% | 2897 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 57,653 psi | 90% | 2884 fps | 100% |
| Hodgdon H1000 | <<locked>> | 86% | 54,360 psi | 85% | 2841 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 57,580 psi | 90% | 2966 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,276 psi | 60% | 1837 fps | 100% |
| Hodgdon US 869 | <<locked>> | 96% | 54,592 psi | 86% | 2858 fps | 96.1% |
| IMR 7828 SSC | <<locked>> | 82% | 55,883 psi | 88% | 2881 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 57,435 psi | 90% | 2818 fps | 97.9% |
| IMR 8133 Enduron | <<locked>> | 94% | 56,275 psi | 88% | 2904 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 55,405 psi | 87% | 2818 fps | 96.7% |
| Lovex S071 | <<locked>> | 86% | 55,956 psi | 88% | 2766 fps | 100% |
| Norma 217 | <<locked>> | 92% | 54,288 psi | 85% | 2864 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 57,609 psi | 90% | 2904 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 57,377 psi | 90% | 2959 fps | 96.9% |
| Ramshot Magnum | <<locked>> | 84% | 55,898 psi | 88% | 2831 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,349 psi | 62% | 1880 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 53,954 psi | 85% | 2890 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 57,217 psi | 90% | 2936 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 55,405 psi | 87% | 2818 fps | 96.7% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 55,680 psi | 87% | 2864 fps | 99.2% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 52,881 psi | 83% | 2841 fps | 97.6% |
| Vihtavuori 24N41 | <<locked>> | 94% | 55,129 psi | 86% | 2867 fps | 96.1% |
| Vihtavuori N165 | <<locked>> | 84% | 57,725 psi | 90% | 2808 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 57,406 psi | 90% | 2861 fps | 99% |
| Vihtavuori N565 | <<locked>> | 84% | 55,071 psi | 86% | 2854 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 57,450 psi | 90% | 2936 fps | 100% |
| Vihtavuori N570 | <<locked>> | 88% | 55,172 psi | 86% | 2946 fps | 99.4% |
| Winchester Supreme 780 | <<locked>> | 82% | 57,246 psi | 90% | 2815 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% | 53,505 psi | 84% | 2730 fps | 100% |
| Accurate 8700 | <<locked>> | 88% | 37,579 psi | 59% | 2546 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 80% | 53,287 psi | 84% | 2835 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 40,263 psi | 63% | 2602 fps | 99.5% |
| ADI AR 2218 | 83.2 gr | 82% | 37,159 psi | 58% | 2615 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 37,594 psi | 59% | 2579 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 53,983 psi | 85% | 2828 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 52,634 psi | 82% | 2736 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 46,789 psi | 73% | 2710 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 38,725 psi | 61% | 2612 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 84% | 39,349 psi | 62% | 2615 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 49,879 psi | 78% | 2743 fps | 99.1% |
| Bofors RP15 | <<locked>> | 80% | 50,256 psi | 79% | 2769 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 43,700 psi | 68% | 2674 fps | 99.8% |
| Bofors RP5 | <<locked>> | 80% | 53,983 psi | 85% | 2828 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 43,961 psi | 69% | 2671 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 46,354 psi | 73% | 2789 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,834 psi | 45% | 1644 fps | 100% |
| Hodgdon US 869 | <<locked>> | 94% | 50,952 psi | 80% | 2795 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 80% | 52,214 psi | 82% | 2825 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 82% | 47,471 psi | 74% | 2651 fps | 95.8% |
| IMR 8133 Enduron | 74.6 gr | 80% | 35,172 psi | 55% | 2507 fps | 98.2% |
| Lovex D100 | <<locked>> | 88% | 51,561 psi | 81% | 2756 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 46,383 psi | 73% | 2618 fps | 100% |
| Norma 217 | <<locked>> | 80% | 35,955 psi | 56% | 2533 fps | 99.7% |
| Ramshot Grand | <<locked>> | 80% | 53,490 psi | 84% | 2844 fps | 100% |
| Ramshot LRT | <<locked>> | 90% | 49,850 psi | 78% | 2828 fps | 95% |
| Ramshot Magnum | <<locked>> | 80% | 48,327 psi | 76% | 2717 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,704 psi | 47% | 1683 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 46,296 psi | 73% | 2769 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 42,496 psi | 67% | 2680 fps | 99% |
| Shooters World 50 BMG | <<locked>> | 88% | 51,561 psi | 81% | 2756 fps | 95.8% |
| SNPE Vectan SP 13 | <<locked>> | 88% | 39,697 psi | 62% | 2569 fps | 95.5% |
| Vihtavuori 20N29 | <<locked>> | 96% | 45,847 psi | 72% | 2713 fps | 95.8% |
| Vihtavuori 24N41 | <<locked>> | 92% | 51,416 psi | 81% | 2805 fps | 95.2% |
| Vihtavuori N165 | <<locked>> | 80% | 50,705 psi | 79% | 2703 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 43,845 psi | 69% | 2621 fps | 96.3% |
| Vihtavuori N565 | <<locked>> | 80% | 48,167 psi | 75% | 2740 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 80% | 43,337 psi | 68% | 2690 fps | 98.7% |
| Vihtavuori N570 | 79.5 gr | 80% | 41,394 psi | 65% | 2684 fps | 96.6% |
| Winchester Supreme 780 | <<locked>> | 80% | 53,592 psi | 84% | 2762 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 41 powders for 7 mm KM Katzmaier loaded with the .284 | 185gr | Nosler RDF. ADI AR 2218 delivers the highest muzzle velocity at 2,966 fps; across all powders the maximum-charge window runs from 1,837 fps to 2,966 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 41 of the 41 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 185.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori 20N29 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, IMR 8133 Enduron rank at the top here: for 7 mm KM Katzmaier with the .284 | 185gr | Nosler RDF 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.