Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 168gr | Nosler Custom Competition 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.
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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 55,419 psi | 87% | 2881 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 56,057 psi | 88% | 2999 fps | 99% |
| ADI AR 2213 | <<locked>> | 82% | 55,143 psi | 86% | 2989 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 55,172 psi | 86% | 2979 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 55,811 psi | 87% | 3114 fps | 99.6% |
| ADI AR 2225 | <<locked>> | 92% | 55,274 psi | 87% | 3002 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 55,782 psi | 87% | 2982 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 54,389 psi | 85% | 2884 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 55,317 psi | 87% | 2963 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 54,027 psi | 85% | 3018 fps | 99% |
| Alliant Reloder-50 | <<locked>> | 94% | 54,549 psi | 85% | 3018 fps | 98.8% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 55,143 psi | 86% | 2946 fps | 99.3% |
| Bofors RP15 | <<locked>> | 84% | 55,405 psi | 87% | 2972 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 55,376 psi | 87% | 2992 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 55,782 psi | 87% | 2982 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 56,376 psi | 88% | 2992 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 57,276 psi | 90% | 2972 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 56,318 psi | 88% | 2959 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 55,230 psi | 87% | 3061 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,174 psi | 60% | 1929 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 57,174 psi | 90% | 2949 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 53,998 psi | 85% | 2972 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 55,927 psi | 88% | 2907 fps | 96.9% |
| IMR 8133 Enduron | <<locked>> | 94% | 54,346 psi | 85% | 2992 fps | 100% |
| Lovex D100 | <<locked>> | 92% | 57,566 psi | 90% | 2963 fps | 96.3% |
| Lovex S071 | <<locked>> | 88% | 57,682 psi | 90% | 2910 fps | 100% |
| Norma 217 | <<locked>> | 94% | 55,970 psi | 88% | 3012 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 55,535 psi | 87% | 2999 fps | 100% |
| Ramshot Magnum | <<locked>> | 84% | 53,882 psi | 84% | 2920 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,189 psi | 61% | 1975 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 56,072 psi | 88% | 3045 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 54,969 psi | 86% | 3018 fps | 99.9% |
| Shooters World 50 BMG | <<locked>> | 92% | 57,566 psi | 90% | 2963 fps | 96.3% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 57,682 psi | 90% | 3005 fps | 98.9% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 50,937 psi | 80% | 2910 fps | 96.3% |
| Vihtavuori N165 | <<locked>> | 84% | 56,115 psi | 88% | 2904 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 55,622 psi | 87% | 2943 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 86% | 56,985 psi | 89% | 3005 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 55,332 psi | 87% | 3022 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 90% | 57,014 psi | 89% | 3094 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 82% | 55,825 psi | 87% | 2979 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 55,666 psi | 87% | 2913 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% | 51,982 psi | 81% | 2828 fps | 100% |
| Accurate 8700 | <<locked>> | 92% | 41,785 psi | 65% | 2736 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 80% | 51,445 psi | 81% | 2923 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 80% | 38,740 psi | 61% | 2677 fps | 98.6% |
| ADI AR 2218 | 90.5 gr | 86% | 41,408 psi | 65% | 2818 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 80% | 36,129 psi | 57% | 2651 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 52,156 psi | 82% | 2923 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 50,821 psi | 80% | 2831 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 45,049 psi | 71% | 2799 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 82% | 40,030 psi | 63% | 2740 fps | 95.5% |
| Alliant Reloder-50 | 91.9 gr | 86% | 40,524 psi | 64% | 2743 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 48,501 psi | 76% | 2831 fps | 98.2% |
| Bofors RP15 | <<locked>> | 80% | 48,631 psi | 76% | 2861 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 42,206 psi | 66% | 2753 fps | 99.2% |
| Bofors RP5 | <<locked>> | 80% | 52,156 psi | 82% | 2923 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 42,221 psi | 66% | 2749 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 80% | 53,534 psi | 84% | 2913 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 52,649 psi | 83% | 2897 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 80% | 44,498 psi | 70% | 2874 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,660 psi | 45% | 1729 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 53,635 psi | 84% | 2890 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 80% | 50,372 psi | 79% | 2913 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 84% | 49,197 psi | 77% | 2789 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 80% | 33,620 psi | 53% | 2566 fps | 96.7% |
| Lovex D100 | <<locked>> | 90% | 53,679 psi | 84% | 2900 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 44,918 psi | 70% | 2707 fps | 100% |
| Norma 217 | <<locked>> | 80% | 34,389 psi | 54% | 2598 fps | 98.9% |
| Ramshot Grand | <<locked>> | 80% | 51,488 psi | 81% | 2933 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 46,412 psi | 73% | 2799 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,617 psi | 46% | 1772 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 44,440 psi | 70% | 2851 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 40,814 psi | 64% | 2749 fps | 97.8% |
| Shooters World 50 BMG | <<locked>> | 90% | 53,679 psi | 84% | 2900 fps | 95.4% |
| SNPE Vectan SP 13 | <<locked>> | 92% | 43,816 psi | 69% | 2756 fps | 95.9% |
| Vihtavuori 20N29 | <<locked>> | 98% | 47,529 psi | 74% | 2848 fps | 95.3% |
| Vihtavuori N165 | <<locked>> | 80% | 49,298 psi | 77% | 2799 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 45,556 psi | 71% | 2762 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 80% | 46,514 psi | 73% | 2822 fps | 99.4% |
| Vihtavuori N568 | <<locked>> | 80% | 41,568 psi | 65% | 2759 fps | 97.6% |
| Vihtavuori N570 | 84.6 gr | 82% | 42,859 psi | 67% | 2822 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 51,721 psi | 81% | 2920 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 52,011 psi | 82% | 2858 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 46 powders for 7 mm KM Katzmaier loaded with the .284 | 168gr | Nosler Custom Competition. 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 46 of the 46 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 1:11.5 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 | Nosler Custom Competition they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon 50BMG burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.