Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 170gr | Norma VULKAN 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 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% | 2877 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 57,232 psi | 90% | 3005 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 82% | 56,101 psi | 88% | 2986 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 56,188 psi | 88% | 2979 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 57,014 psi | 89% | 3120 fps | 99.7% |
| ADI AR 2225 | <<locked>> | 92% | 56,289 psi | 88% | 3002 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 56,739 psi | 89% | 2979 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 55,172 psi | 86% | 2881 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 56,304 psi | 88% | 2963 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 54,998 psi | 86% | 3018 fps | 99.2% |
| Alliant Reloder-50 | <<locked>> | 94% | 55,695 psi | 87% | 3022 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 55,912 psi | 88% | 2946 fps | 99.4% |
| Bofors RP15 | <<locked>> | 84% | 56,318 psi | 88% | 2972 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 56,304 psi | 88% | 2992 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 56,739 psi | 89% | 2979 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 57,377 psi | 90% | 2992 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 57,203 psi | 90% | 2959 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 56,376 psi | 88% | 3061 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,174 psi | 60% | 1923 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 54,795 psi | 86% | 2972 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 56,710 psi | 89% | 2910 fps | 97.2% |
| IMR 8133 Enduron | <<locked>> | 94% | 55,361 psi | 87% | 2992 fps | 100% |
| Lovex S071 | <<locked>> | 86% | 55,042 psi | 86% | 2858 fps | 100% |
| Norma 217 | <<locked>> | 94% | 57,000 psi | 89% | 3012 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 56,391 psi | 88% | 2995 fps | 100% |
| Ramshot Magnum | <<locked>> | 84% | 54,853 psi | 86% | 2920 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,349 psi | 62% | 1969 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 57,188 psi | 90% | 3041 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 56,144 psi | 88% | 3018 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 54,752 psi | 86% | 2946 fps | 98.6% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 52,025 psi | 82% | 2917 fps | 96.7% |
| Vihtavuori N165 | <<locked>> | 84% | 56,971 psi | 89% | 2904 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 56,623 psi | 89% | 2949 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 84% | 54,259 psi | 85% | 2946 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 56,289 psi | 88% | 3022 fps | 99.9% |
| Vihtavuori N570 | <<locked>> | 88% | 54,215 psi | 85% | 3028 fps | 98.9% |
| Winchester StaBALL HD | <<locked>> | 82% | 56,855 psi | 89% | 2972 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,521 psi | 89% | 2910 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% | 52,692 psi | 83% | 2822 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 39,552 psi | 62% | 2677 fps | 95% |
| ADI AR 2213 | <<locked>> | 80% | 52,359 psi | 82% | 2923 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 39,392 psi | 62% | 2677 fps | 98.9% |
| ADI AR 2218 | 89 gr | 84% | 39,218 psi | 61% | 2753 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 36,796 psi | 58% | 2651 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 53,069 psi | 83% | 2920 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 51,735 psi | 81% | 2828 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 45,963 psi | 72% | 2799 fps | 100% |
| Alliant Reloder-33 | 88.5 gr | 82% | 40,872 psi | 64% | 2743 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 86% | 41,365 psi | 65% | 2746 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 49,066 psi | 77% | 2828 fps | 98.5% |
| Bofors RP15 | <<locked>> | 80% | 49,342 psi | 77% | 2858 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 42,888 psi | 67% | 2753 fps | 99.4% |
| Bofors RP5 | <<locked>> | 80% | 53,069 psi | 83% | 2920 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 43,120 psi | 68% | 2753 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,505 psi | 84% | 2900 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 80% | 45,339 psi | 71% | 2874 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,718 psi | 45% | 1719 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 51,111 psi | 80% | 2910 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 84% | 49,937 psi | 78% | 2792 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 80% | 34,403 psi | 54% | 2572 fps | 97.1% |
| Lovex S071 | <<locked>> | 80% | 45,571 psi | 71% | 2707 fps | 100% |
| Norma 217 | <<locked>> | 80% | 35,099 psi | 55% | 2598 fps | 99.1% |
| Ramshot Grand | <<locked>> | 80% | 52,489 psi | 82% | 2933 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 47,326 psi | 74% | 2799 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,544 psi | 46% | 1762 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 45,426 psi | 71% | 2851 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 41,510 psi | 65% | 2749 fps | 98.1% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 41,698 psi | 65% | 2697 fps | 95.4% |
| Vihtavuori 20N29 | <<locked>> | 98% | 48,385 psi | 76% | 2848 fps | 95.7% |
| Vihtavuori N165 | <<locked>> | 80% | 49,966 psi | 78% | 2795 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 43,236 psi | 68% | 2700 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 80% | 47,369 psi | 74% | 2825 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 80% | 42,438 psi | 67% | 2766 fps | 97.9% |
| Vihtavuori N570 | 83.1 gr | 80% | 40,625 psi | 64% | 2756 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 52,881 psi | 83% | 2917 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 52,678 psi | 83% | 2851 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 | 170gr | Norma VULKAN. ADI AR 2218 delivers the highest muzzle velocity at 3,120 fps; across all powders the maximum-charge window runs from 1,923 fps to 3,120 fps. Accurate 8700 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 170.0 gr projectile in 0.284" calls for a 1:12.0 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 | 170gr | Norma VULKAN 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.