Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 190gr | Berger Long Range Hybrid Target bullet and 38 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 Ramshot LRT.
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% | 57,508 psi | 90% | 2753 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 54,563 psi | 86% | 2835 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 82% | 57,261 psi | 90% | 2861 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 57,479 psi | 90% | 2858 fps | 100% |
| ADI AR 2218 | <<locked>> | 92% | 54,157 psi | 85% | 2940 fps | 99.8% |
| ADI AR 2225 | <<locked>> | 90% | 53,998 psi | 85% | 2828 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 56,376 psi | 88% | 2753 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 57,624 psi | 90% | 2835 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 56,405 psi | 88% | 2913 fps | 99.8% |
| Alliant Reloder-50 | <<locked>> | 94% | 57,014 psi | 89% | 2917 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 57,029 psi | 89% | 2828 fps | 99.8% |
| Bofors RP15 | <<locked>> | 84% | 57,479 psi | 90% | 2848 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 57,493 psi | 90% | 2867 fps | 100% |
| Hodgdon H1000 | <<locked>> | 86% | 54,882 psi | 86% | 2815 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 84% | 54,012 psi | 85% | 2881 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,334 psi | 60% | 1811 fps | 100% |
| Hodgdon US 869 | <<locked>> | 96% | 55,071 psi | 86% | 2835 fps | 96.4% |
| IMR 7828 SSC | <<locked>> | 82% | 56,115 psi | 88% | 2848 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 57,696 psi | 90% | 2792 fps | 98.1% |
| IMR 8133 Enduron | <<locked>> | 94% | 56,753 psi | 89% | 2877 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 55,753 psi | 87% | 2795 fps | 97% |
| Lovex S071 | <<locked>> | 86% | 56,318 psi | 88% | 2736 fps | 100% |
| Norma 217 | <<locked>> | 92% | 54,737 psi | 86% | 2841 fps | 100% |
| Ramshot LRT | <<locked>> | 92% | 53,867 psi | 84% | 2871 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 84% | 56,289 psi | 88% | 2802 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,421 psi | 62% | 1854 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 54,433 psi | 85% | 2861 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 57,580 psi | 90% | 2907 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 55,753 psi | 87% | 2795 fps | 97% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 56,115 psi | 88% | 2841 fps | 99.4% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 53,214 psi | 83% | 2815 fps | 97.9% |
| Vihtavuori 24N41 | <<locked>> | 94% | 55,564 psi | 87% | 2841 fps | 96.4% |
| Vihtavuori N165 | <<locked>> | 82% | 54,491 psi | 85% | 2726 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 57,624 psi | 90% | 2831 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 84% | 55,376 psi | 87% | 2825 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 57,740 psi | 90% | 2907 fps | 100% |
| Vihtavuori N570 | <<locked>> | 88% | 55,448 psi | 87% | 2917 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 57,667 psi | 90% | 2785 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% | 53,824 psi | 84% | 2700 fps | 100% |
| Accurate 8700 | <<locked>> | 88% | 37,797 psi | 59% | 2526 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 80% | 53,447 psi | 84% | 2805 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 40,553 psi | 64% | 2579 fps | 99.6% |
| ADI AR 2218 | 82.1 gr | 82% | 37,405 psi | 59% | 2595 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 37,898 psi | 59% | 2556 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 52,939 psi | 83% | 2703 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 47,108 psi | 74% | 2680 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 39,015 psi | 61% | 2589 fps | 96.5% |
| Alliant Reloder-50 | <<locked>> | 82% | 36,811 psi | 58% | 2530 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 50,053 psi | 78% | 2717 fps | 99.2% |
| Bofors RP15 | <<locked>> | 80% | 50,546 psi | 79% | 2740 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 44,019 psi | 69% | 2651 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 44,324 psi | 69% | 2648 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 46,760 psi | 73% | 2766 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,761 psi | 45% | 1617 fps | 100% |
| Hodgdon US 869 | <<locked>> | 94% | 51,329 psi | 80% | 2772 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 80% | 52,547 psi | 82% | 2795 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 80% | 44,686 psi | 70% | 2566 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 80% | 35,433 psi | 56% | 2484 fps | 98.5% |
| Lovex D100 | <<locked>> | 86% | 48,356 psi | 76% | 2671 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 46,586 psi | 73% | 2589 fps | 100% |
| Norma 217 | <<locked>> | 80% | 36,274 psi | 57% | 2510 fps | 99.8% |
| Ramshot LRT | 90 gr | 90% | 50,183 psi | 79% | 2805 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 80% | 48,588 psi | 76% | 2690 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,646 psi | 46% | 1657 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 46,659 psi | 73% | 2743 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 42,786 psi | 67% | 2654 fps | 99.2% |
| Shooters World 50 BMG | <<locked>> | 86% | 48,356 psi | 76% | 2671 fps | 95.2% |
| SNPE Vectan SP 13 | <<locked>> | 88% | 39,856 psi | 62% | 2546 fps | 95.9% |
| Vihtavuori 20N29 | <<locked>> | 94% | 43,047 psi | 67% | 2631 fps | 95.2% |
| Vihtavuori 24N41 | <<locked>> | 92% | 51,721 psi | 81% | 2779 fps | 95.5% |
| Vihtavuori N165 | <<locked>> | 80% | 50,995 psi | 80% | 2677 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 44,164 psi | 69% | 2598 fps | 96.7% |
| Vihtavuori N565 | <<locked>> | 80% | 48,515 psi | 76% | 2713 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 80% | 43,584 psi | 68% | 2664 fps | 98.9% |
| Vihtavuori N570 | 78.5 gr | 80% | 41,771 psi | 65% | 2664 fps | 97% |
| Winchester Supreme 780 | <<locked>> | 80% | 53,751 psi | 84% | 2730 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 38 powders for 7 mm KM Katzmaier loaded with the .284 | 190gr | Berger Long Range Hybrid Target. ADI AR 2218 delivers the highest muzzle velocity at 2,940 fps; across all powders the maximum-charge window runs from 1,811 fps to 2,940 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 38 of the 38 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 190.0 gr projectile in 0.284" calls for a 1:8.5 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, Ramshot LRT rank at the top here: for 7 mm KM Katzmaier with the .284 | 190gr | Berger Long Range Hybrid Target 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.