Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 175gr | Nosler Partition 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 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% | 56,333 psi | 88% | 2841 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 57,159 psi | 90% | 2969 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 82% | 56,101 psi | 88% | 2949 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 56,188 psi | 88% | 2943 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 57,029 psi | 89% | 3084 fps | 99.8% |
| ADI AR 2225 | <<locked>> | 92% | 56,434 psi | 88% | 2966 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 56,753 psi | 89% | 2943 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 55,274 psi | 87% | 2844 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 56,391 psi | 88% | 2927 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 55,085 psi | 86% | 2989 fps | 99.4% |
| Alliant Reloder-50 | <<locked>> | 94% | 55,550 psi | 87% | 2989 fps | 99.1% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 55,927 psi | 88% | 2913 fps | 99.5% |
| Bofors RP15 | <<locked>> | 84% | 56,333 psi | 88% | 2936 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 56,333 psi | 88% | 2956 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 56,753 psi | 89% | 2943 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 57,392 psi | 90% | 2956 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 57,203 psi | 90% | 2920 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 56,492 psi | 89% | 3025 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,261 psi | 60% | 1893 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 54,984 psi | 86% | 2936 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 56,681 psi | 89% | 2871 fps | 97.4% |
| IMR 8133 Enduron | <<locked>> | 94% | 55,259 psi | 87% | 2956 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 54,549 psi | 85% | 2867 fps | 96% |
| Lovex S071 | <<locked>> | 86% | 55,187 psi | 86% | 2825 fps | 100% |
| Norma 217 | <<locked>> | 94% | 56,971 psi | 89% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 56,449 psi | 88% | 2959 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 56,420 psi | 88% | 3005 fps | 96.1% |
| Ramshot Magnum | <<locked>> | 84% | 54,853 psi | 86% | 2884 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,291 psi | 62% | 1936 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 57,145 psi | 90% | 3005 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 56,202 psi | 88% | 2986 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 54,549 psi | 85% | 2867 fps | 96% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 54,766 psi | 86% | 2913 fps | 98.8% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 51,953 psi | 81% | 2884 fps | 96.9% |
| Vihtavuori N165 | <<locked>> | 84% | 57,029 psi | 89% | 2867 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 56,536 psi | 89% | 2913 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 84% | 54,230 psi | 85% | 2910 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 56,449 psi | 88% | 2989 fps | 99.9% |
| Vihtavuori N570 | <<locked>> | 88% | 54,128 psi | 85% | 2995 fps | 99% |
| Winchester StaBALL HD | <<locked>> | 82% | 56,898 psi | 89% | 2936 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,362 psi | 88% | 2871 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% | 52,794 psi | 83% | 2789 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 39,537 psi | 62% | 2648 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 80% | 52,315 psi | 82% | 2890 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 39,465 psi | 62% | 2644 fps | 99% |
| ADI AR 2218 | 87.3 gr | 84% | 39,262 psi | 62% | 2723 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 80% | 36,883 psi | 58% | 2621 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 53,026 psi | 83% | 2884 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 51,779 psi | 81% | 2792 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 45,876 psi | 72% | 2762 fps | 100% |
| Alliant Reloder-33 | 84.7 gr | 80% | 37,942 psi | 59% | 2648 fps | 95.1% |
| Alliant Reloder-50 | <<locked>> | 86% | 41,481 psi | 65% | 2720 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 49,110 psi | 77% | 2795 fps | 98.6% |
| Bofors RP15 | <<locked>> | 80% | 49,400 psi | 77% | 2822 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 42,989 psi | 67% | 2723 fps | 99.5% |
| Bofors RP5 | <<locked>> | 80% | 53,026 psi | 83% | 2884 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 43,047 psi | 67% | 2717 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,461 psi | 84% | 2861 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 80% | 45,484 psi | 71% | 2841 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,761 psi | 45% | 1693 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 51,242 psi | 80% | 2877 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 82% | 46,688 psi | 73% | 2697 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 80% | 34,447 psi | 54% | 2546 fps | 97.4% |
| Lovex D100 | <<locked>> | 88% | 50,792 psi | 80% | 2805 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 45,556 psi | 71% | 2671 fps | 100% |
| Norma 217 | <<locked>> | 80% | 35,172 psi | 55% | 2572 fps | 99.3% |
| Ramshot Grand | <<locked>> | 80% | 52,504 psi | 82% | 2897 fps | 100% |
| Ramshot LRT | <<locked>> | 92% | 52,475 psi | 82% | 2940 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 80% | 47,398 psi | 74% | 2766 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,602 psi | 46% | 1732 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 45,382 psi | 71% | 2818 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 41,611 psi | 65% | 2720 fps | 98.4% |
| Shooters World 50 BMG | <<locked>> | 88% | 50,792 psi | 80% | 2805 fps | 95% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 41,626 psi | 65% | 2667 fps | 95.6% |
| Vihtavuori 20N29 | <<locked>> | 96% | 45,165 psi | 71% | 2756 fps | 95% |
| Vihtavuori N165 | <<locked>> | 80% | 50,053 psi | 78% | 2762 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 43,265 psi | 68% | 2671 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 80% | 47,384 psi | 74% | 2792 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 80% | 42,453 psi | 67% | 2733 fps | 98.1% |
| Vihtavuori N570 | 81.5 gr | 80% | 40,654 psi | 64% | 2726 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 52,924 psi | 83% | 2881 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 52,649 psi | 83% | 2815 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 | 175gr | Nosler Partition. ADI AR 2218 delivers the highest muzzle velocity at 3,084 fps; across all powders the maximum-charge window runs from 1,893 fps to 3,084 fps. Accurate 8700 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 175.0 gr projectile in 0.284" calls for a 1:10.5 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 | 175gr | Nosler Partition 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.