Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 168gr | Barnes LRX BT bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Hodgdon Retumbo and Vihtavuori N570.
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>> | 84% | 55,013 psi | 86% | 2877 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 51,140 psi | 80% | 2923 fps | 98% |
| Accurate MAGPRO | <<locked>> | 82% | 54,404 psi | 85% | 2992 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 82% | 56,246 psi | 88% | 2969 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,187 psi | 86% | 2992 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 54,563 psi | 86% | 2972 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 55,230 psi | 87% | 3107 fps | 99.4% |
| ADI AR 2225 | <<locked>> | 94% | 54,418 psi | 85% | 2999 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 56,376 psi | 88% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,782 psi | 87% | 2956 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,651 psi | 87% | 2982 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 53,998 psi | 85% | 2884 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,897 psi | 86% | 2966 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 57,232 psi | 90% | 3077 fps | 99.3% |
| Alliant Reloder-50 | <<locked>> | 98% | 57,174 psi | 90% | 3068 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,419 psi | 87% | 2953 fps | 99.2% |
| Bofors RP15 | <<locked>> | 86% | 55,085 psi | 86% | 2972 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,578 psi | 86% | 2986 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 55,651 psi | 87% | 2982 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,985 psi | 88% | 2992 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 57,580 psi | 90% | 2979 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,579 psi | 89% | 2963 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 54,578 psi | 86% | 3058 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,913 psi | 59% | 1913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 57,595 psi | 90% | 2953 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 53,838 psi | 84% | 2976 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 56,347 psi | 88% | 2910 fps | 96.7% |
| IMR 8133 Enduron | <<locked>> | 98% | 56,884 psi | 89% | 3038 fps | 100% |
| Lovex D100 | <<locked>> | 94% | 57,406 psi | 90% | 2956 fps | 95.9% |
| Lovex S071 | <<locked>> | 90% | 57,246 psi | 90% | 2910 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,636 psi | 86% | 3002 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,753 psi | 87% | 2995 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 55,158 psi | 86% | 2999 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 57,609 psi | 90% | 2979 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,899 psi | 61% | 1955 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 55,056 psi | 86% | 3038 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 54,114 psi | 85% | 3012 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 82% | 56,623 psi | 89% | 2940 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 55,782 psi | 87% | 2953 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 94% | 57,406 psi | 90% | 2956 fps | 95.9% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,794 psi | 83% | 2930 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,463 psi | 87% | 2949 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 55,898 psi | 88% | 2917 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,057 psi | 88% | 2907 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,405 psi | 87% | 2943 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 82% | 55,448 psi | 87% | 2910 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,100 psi | 86% | 3002 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 88% | 56,507 psi | 89% | 2999 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 54,723 psi | 86% | 3015 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 92% | 56,260 psi | 88% | 3087 fps | 99% |
| Winchester StaBALL HD | <<locked>> | 84% | 54,853 psi | 86% | 2972 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,666 psi | 87% | 2917 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% | 48,153 psi | 75% | 2772 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 40,596 psi | 64% | 2720 fps | 95% |
| Accurate MAGPRO | <<locked>> | 80% | 50,633 psi | 79% | 2927 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 80% | 52,518 psi | 82% | 2910 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 47,935 psi | 75% | 2867 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 80% | 35,534 psi | 56% | 2605 fps | 97.5% |
| ADI AR 2218 | 88.5 gr | 88% | 40,712 psi | 64% | 2805 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 32,851 psi | 51% | 2575 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 52,910 psi | 83% | 2910 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,388 psi | 82% | 2904 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,559 psi | 76% | 2864 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,210 psi | 74% | 2782 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,350 psi | 65% | 2736 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 42,163 psi | 66% | 2799 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 90% | 42,090 psi | 66% | 2785 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,513 psi | 71% | 2772 fps | 97.4% |
| Bofors RP15 | <<locked>> | 80% | 45,063 psi | 71% | 2795 fps | 99.7% |
| Bofors RP30 | <<locked>> | 80% | 38,595 psi | 60% | 2680 fps | 98.3% |
| Bofors RP5 | <<locked>> | 80% | 48,559 psi | 76% | 2864 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 38,856 psi | 61% | 2684 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 80% | 50,256 psi | 79% | 2858 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,342 psi | 77% | 2841 fps | 99.5% |
| Hodgdon Retumbo | 76 gr | 80% | 40,611 psi | 64% | 2802 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,543 psi | 45% | 1713 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,575 psi | 79% | 2838 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 80% | 46,717 psi | 73% | 2848 fps | 99.5% |
| IMR 7977 Enduron | <<locked>> | 86% | 49,313 psi | 77% | 2789 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 82% | 32,634 psi | 51% | 2549 fps | 96.1% |
| Lovex D100 | <<locked>> | 92% | 53,432 psi | 84% | 2894 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 41,423 psi | 65% | 2648 fps | 100% |
| Norma 217 | <<locked>> | 80% | 30,705 psi | 48% | 2513 fps | 97.5% |
| Norma MRP | <<locked>> | 80% | 51,880 psi | 81% | 2933 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,442 psi | 74% | 2867 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 80% | 42,525 psi | 67% | 2733 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,341 psi | 46% | 1755 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 40,132 psi | 63% | 2776 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 36,825 psi | 58% | 2664 fps | 96.4% |
| Rottweil R 904 | <<locked>> | 80% | 52,968 psi | 83% | 2881 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 52,098 psi | 82% | 2894 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 92% | 53,432 psi | 84% | 2894 fps | 95% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 42,714 psi | 67% | 2740 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,764 psi | 81% | 2890 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 52,301 psi | 82% | 2861 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,977 psi | 72% | 2743 fps | 100% |
| Vihtavuori N170 | <<locked>> | 84% | 45,092 psi | 71% | 2756 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 52,011 psi | 82% | 2858 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,314 psi | 80% | 2936 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 80% | 42,743 psi | 67% | 2753 fps | 98.7% |
| Vihtavuori N568 | <<locked>> | 80% | 37,956 psi | 59% | 2687 fps | 96.2% |
| Vihtavuori N570 | 82.8 gr | 84% | 41,887 psi | 66% | 2805 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,065 psi | 74% | 2858 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,530 psi | 76% | 2799 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 52 powders for 7 mm KM Katzmaier loaded with the .284 | 168gr | Barnes LRX BT. ADI AR 2218 delivers the highest muzzle velocity at 3,107 fps; across all powders the maximum-charge window runs from 1,913 fps to 3,107 fps. Accurate 8700 gives the best case fill at 100 %, and 52 of the 52 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 168.0 gr projectile in 0.284" calls for a 1:9.0 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, Hodgdon Retumbo, Vihtavuori N570 rank at the top here: for 7 mm KM Katzmaier with the .284 | 168gr | Barnes LRX BT 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.