Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 168gr | Sierra MatchKing bullet and 42 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-50.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 55,361 psi | 87% | 2877 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 55,898 psi | 88% | 2999 fps | 99% |
| ADI AR 2213 | <<locked>> | 82% | 54,911 psi | 86% | 2986 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 54,969 psi | 86% | 2976 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 55,593 psi | 87% | 3114 fps | 99.5% |
| ADI AR 2225 | <<locked>> | 92% | 55,027 psi | 86% | 2999 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 55,521 psi | 87% | 2979 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 57,711 psi | 90% | 2930 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 55,042 psi | 86% | 2963 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 53,809 psi | 84% | 3015 fps | 99% |
| Alliant Reloder-50 | <<locked>> | 94% | 54,157 psi | 85% | 3015 fps | 98.7% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 54,940 psi | 86% | 2946 fps | 99.2% |
| Bofors RP15 | <<locked>> | 84% | 55,158 psi | 86% | 2972 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 55,114 psi | 86% | 2992 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 55,521 psi | 87% | 2979 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 56,115 psi | 88% | 2992 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 57,217 psi | 90% | 2972 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 56,072 psi | 88% | 2956 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 55,143 psi | 86% | 3061 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,189 psi | 60% | 1929 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 56,971 psi | 89% | 2946 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 57,624 psi | 90% | 3031 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 55,767 psi | 87% | 2907 fps | 96.9% |
| IMR 8133 Enduron | <<locked>> | 94% | 54,099 psi | 85% | 2989 fps | 100% |
| Lovex D100 | <<locked>> | 92% | 57,377 psi | 90% | 2963 fps | 96.3% |
| Lovex S071 | <<locked>> | 88% | 57,638 psi | 90% | 2913 fps | 100% |
| Norma 217 | <<locked>> | 94% | 55,724 psi | 87% | 3012 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 55,259 psi | 87% | 2995 fps | 100% |
| Ramshot Magnum | <<locked>> | 84% | 53,635 psi | 84% | 2920 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,204 psi | 61% | 1975 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 55,811 psi | 87% | 3041 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 54,723 psi | 86% | 3015 fps | 99.9% |
| Shooters World 50 BMG | <<locked>> | 92% | 57,377 psi | 90% | 2963 fps | 96.3% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 57,290 psi | 90% | 3002 fps | 98.9% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 50,763 psi | 80% | 2910 fps | 96.3% |
| Vihtavuori N165 | <<locked>> | 84% | 55,883 psi | 88% | 2904 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 55,419 psi | 87% | 2943 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 86% | 56,782 psi | 89% | 3002 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 55,100 psi | 86% | 3022 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 90% | 56,782 psi | 89% | 3091 fps | 99.1% |
| Winchester StaBALL HD | <<locked>> | 82% | 55,593 psi | 87% | 2976 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 55,419 psi | 87% | 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% | 51,750 psi | 81% | 2825 fps | 100% |
| Accurate 8700 | <<locked>> | 92% | 41,611 psi | 65% | 2736 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 80% | 51,372 psi | 81% | 2923 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 80% | 38,551 psi | 60% | 2671 fps | 98.5% |
| ADI AR 2218 | 90.2 gr | 86% | 41,234 psi | 65% | 2815 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 80% | 35,926 psi | 56% | 2648 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 52,098 psi | 82% | 2923 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 50,763 psi | 80% | 2831 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 44,962 psi | 70% | 2799 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 82% | 39,813 psi | 62% | 2740 fps | 95.4% |
| Alliant Reloder-50 | 91.6 gr | 86% | 40,321 psi | 63% | 2736 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 48,298 psi | 76% | 2828 fps | 98.2% |
| Bofors RP15 | <<locked>> | 80% | 48,385 psi | 76% | 2858 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 41,959 psi | 66% | 2749 fps | 99.2% |
| Bofors RP5 | <<locked>> | 80% | 52,098 psi | 82% | 2923 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 42,134 psi | 66% | 2749 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 80% | 53,490 psi | 84% | 2913 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 52,576 psi | 82% | 2900 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 80% | 44,222 psi | 69% | 2874 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,776 psi | 45% | 1729 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 53,577 psi | 84% | 2890 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 80% | 50,096 psi | 79% | 2910 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 84% | 48,979 psi | 77% | 2789 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 80% | 33,547 psi | 53% | 2566 fps | 96.7% |
| Lovex D100 | <<locked>> | 90% | 53,461 psi | 84% | 2897 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 44,686 psi | 70% | 2707 fps | 100% |
| Norma 217 | <<locked>> | 80% | 34,185 psi | 54% | 2595 fps | 98.8% |
| Ramshot Grand | <<locked>> | 80% | 51,198 psi | 80% | 2930 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 46,354 psi | 73% | 2799 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,602 psi | 46% | 1772 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 44,193 psi | 69% | 2848 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 40,582 psi | 64% | 2746 fps | 97.8% |
| Shooters World 50 BMG | <<locked>> | 90% | 53,461 psi | 84% | 2897 fps | 95.3% |
| SNPE Vectan SP 13 | <<locked>> | 92% | 43,642 psi | 68% | 2756 fps | 95.9% |
| Vihtavuori 20N29 | <<locked>> | 98% | 47,195 psi | 74% | 2841 fps | 95.2% |
| Vihtavuori N165 | <<locked>> | 80% | 49,081 psi | 77% | 2795 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 45,368 psi | 71% | 2759 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 80% | 46,267 psi | 73% | 2818 fps | 99.4% |
| Vihtavuori N568 | <<locked>> | 80% | 41,510 psi | 65% | 2762 fps | 97.6% |
| Vihtavuori N570 | 84.3 gr | 82% | 42,612 psi | 67% | 2818 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 51,663 psi | 81% | 2920 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 51,793 psi | 81% | 2854 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 42 powders for 7 mm KM Katzmaier loaded with the .284 | 168gr | Sierra MatchKing. ADI AR 2218 delivers the highest muzzle velocity at 3,114 fps; across all powders the maximum-charge window runs from 1,929 fps to 3,114 fps. Accurate 8700 gives the best case fill at 100 %, and 42 of the 42 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 168.0 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-50 rank at the top here: for 7 mm KM Katzmaier with the .284 | 168gr | Sierra MatchKing 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.