Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 160gr | North Fork FPS bullet and 43 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 Hodgdon H1000.
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% | 57,435 psi | 90% | 2918 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 54,563 psi | 86% | 2955 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 84% | 57,653 psi | 90% | 3097 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 84% | 57,159 psi | 90% | 3024 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 92% | 56,884 psi | 89% | 3010 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 57,682 psi | 90% | 3140 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 94% | 56,884 psi | 89% | 3033 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,682 psi | 90% | 2993 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,740 psi | 90% | 3018 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,115 psi | 88% | 2923 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,101 psi | 89% | 3002 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,695 psi | 87% | 3043 fps | 98.5% |
| Alliant Reloder-50 | <<locked>> | 96% | 56,101 psi | 88% | 3038 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,174 psi | 90% | 2981 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 57,130 psi | 90% | 3061 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,927 psi | 89% | 3021 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,740 psi | 90% | 3074 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 54,476 psi | 85% | 3025 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 55,724 psi | 87% | 2954 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 82% | 54,636 psi | 86% | 2937 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,855 psi | 89% | 3153 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,914 psi | 61% | 1944 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,695 psi | 87% | 2982 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 82% | 55,521 psi | 87% | 3003 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,404 psi | 85% | 2936 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,767 psi | 87% | 3017 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 55,898 psi | 88% | 2897 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,363 psi | 90% | 3039 fps | 100% |
| Ramshot Magnum | <<locked>> | 84% | 57,305 psi | 90% | 2980 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,508 psi | 62% | 1991 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,696 psi | 90% | 3074 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,724 psi | 89% | 3044 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 82% | 57,638 psi | 90% | 2988 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 56,072 psi | 88% | 2962 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,276 psi | 90% | 3035 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,260 psi | 88% | 2917 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 55,811 psi | 87% | 2945 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 82% | 57,638 psi | 90% | 2948 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,433 psi | 85% | 2993 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 86% | 55,042 psi | 86% | 2975 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 90% | 57,174 psi | 90% | 3049 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 90% | 55,114 psi | 86% | 3051 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,522 psi | 90% | 3013 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% | 50,183 psi | 79% | 2808 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 46,296 psi | 73% | 2820 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 80% | 50,067 psi | 78% | 2966 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 80% | 49,705 psi | 78% | 2897 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 80% | 37,304 psi | 58% | 2636 fps | 97% |
| ADI AR 2218 | 92.7 gr | 88% | 42,801 psi | 67% | 2837 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 80% | 34,534 psi | 54% | 2603 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,012 psi | 85% | 2932 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,459 psi | 79% | 2898 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,153 psi | 77% | 2816 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,366 psi | 68% | 2770 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 44,556 psi | 70% | 2831 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 90% | 44,933 psi | 70% | 2825 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,920 psi | 74% | 2798 fps | 96.9% |
| Bofors RP15 | <<locked>> | 80% | 47,021 psi | 74% | 2887 fps | 99.8% |
| Bofors RP30 | <<locked>> | 80% | 40,466 psi | 63% | 2712 fps | 98% |
| Bofors RP5 | <<locked>> | 80% | 50,459 psi | 79% | 2953 fps | 100% |
| Hodgdon H1000 | 78.3 gr | 80% | 38,348 psi | 60% | 2720 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 80% | 45,919 psi | 72% | 2779 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,053 psi | 80% | 2875 fps | 99.2% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,438 psi | 67% | 2894 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,674 psi | 45% | 1743 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,185 psi | 82% | 2923 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 80% | 51,779 psi | 81% | 2941 fps | 99.6% |
| IMR 7977 Enduron | <<locked>> | 86% | 50,908 psi | 80% | 2874 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 82% | 34,505 psi | 54% | 2581 fps | 95.6% |
| Lovex S071 | <<locked>> | 80% | 43,308 psi | 68% | 2684 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,706 psi | 51% | 2547 fps | 97.1% |
| Ramshot Magnum | <<locked>> | 80% | 49,182 psi | 77% | 2851 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,486 psi | 46% | 1783 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,250 psi | 66% | 2807 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,914 psi | 61% | 2696 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 80% | 53,867 psi | 84% | 2927 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 48,211 psi | 76% | 2837 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,519 psi | 84% | 2976 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,340 psi | 73% | 2753 fps | 99.8% |
| Vihtavuori N170 | <<locked>> | 90% | 49,095 psi | 77% | 2827 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 54,128 psi | 85% | 2898 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 50,720 psi | 79% | 2927 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 80% | 44,860 psi | 70% | 2788 fps | 98.4% |
| Vihtavuori N568 | <<locked>> | 80% | 39,900 psi | 63% | 2715 fps | 95.7% |
| Vihtavuori N570 | 87.6 gr | 84% | 44,382 psi | 70% | 2839 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,559 psi | 78% | 2894 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 50 powders for 7 mm KM Katzmaier loaded with the .284 | 160gr | North Fork FPS. Hodgdon Retumbo delivers the highest muzzle velocity at 3,153 fps; across all powders the maximum-charge window runs from 1,944 fps to 3,153 fps. Accurate 8700 gives the best case fill at 100 %, and 50 of the 50 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 160.0 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, Hodgdon H1000 rank at the top here: for 7 mm KM Katzmaier with the .284 | 160gr | North Fork FPS they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon 50BMG, Hodgdon US 869, Lovex D100 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.