Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 160gr | Barnes TSX FB bullet and 50 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 ReloadSwiss RS 76.
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% | 54,781 psi | 86% | 2933 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 50,662 psi | 79% | 2966 fps | 97.6% |
| Accurate MAGPRO | <<locked>> | 82% | 53,954 psi | 85% | 3045 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 55,912 psi | 88% | 3025 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,853 psi | 86% | 3045 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 54,360 psi | 85% | 3031 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 54,839 psi | 86% | 3156 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 94% | 53,969 psi | 85% | 3051 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,434 psi | 87% | 3015 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,347 psi | 87% | 3038 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 57,276 psi | 90% | 2992 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,418 psi | 85% | 3022 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 56,855 psi | 89% | 3130 fps | 99.1% |
| Alliant Reloder-50 | <<locked>> | 98% | 56,782 psi | 89% | 3120 fps | 98.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,085 psi | 86% | 3005 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 54,737 psi | 86% | 3028 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,201 psi | 85% | 3038 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 55,347 psi | 87% | 3038 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,521 psi | 87% | 3045 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 57,261 psi | 90% | 3035 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,260 psi | 88% | 3022 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 53,954 psi | 85% | 3110 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,942 psi | 59% | 1965 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 57,188 psi | 90% | 3009 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 86% | 57,348 psi | 90% | 3094 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 55,869 psi | 88% | 2959 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 98% | 56,594 psi | 89% | 3094 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 56,724 psi | 89% | 2963 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,186 psi | 85% | 3051 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,390 psi | 87% | 3051 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,650 psi | 86% | 3048 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 57,305 psi | 90% | 3035 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,899 psi | 61% | 2008 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 54,578 psi | 86% | 3091 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 53,737 psi | 84% | 3061 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 56,130 psi | 88% | 2995 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 55,245 psi | 87% | 3009 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 2976 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 54,882 psi | 86% | 3002 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 57,464 psi | 90% | 2986 fps | 99.9% |
| Somchem S385 | <<locked>> | 82% | 55,492 psi | 87% | 2972 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 55,709 psi | 87% | 2963 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,085 psi | 86% | 2992 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 82% | 55,114 psi | 86% | 2969 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,752 psi | 86% | 3058 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 56,101 psi | 88% | 3054 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 54,302 psi | 85% | 3068 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 92% | 55,738 psi | 87% | 3133 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 54,331 psi | 85% | 3028 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,332 psi | 87% | 2969 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% | 47,703 psi | 75% | 2822 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 43,569 psi | 68% | 2831 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 80% | 50,299 psi | 79% | 2979 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 80% | 52,301 psi | 82% | 2969 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 47,442 psi | 74% | 2917 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 80% | 35,331 psi | 55% | 2651 fps | 96.9% |
| ADI AR 2218 | 93 gr | 90% | 43,627 psi | 68% | 2927 fps | 96.3% |
| ADI AR 2225 | <<locked>> | 80% | 32,489 psi | 51% | 2615 fps | 98.7% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,967 psi | 81% | 2956 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,095 psi | 75% | 2913 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,833 psi | 73% | 2835 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,075 psi | 64% | 2785 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 41,829 psi | 66% | 2838 fps | 95.4% |
| Alliant Reloder-50 | <<locked>> | 92% | 45,136 psi | 71% | 2900 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,136 psi | 71% | 2822 fps | 96.9% |
| Bofors RP15 | <<locked>> | 80% | 44,846 psi | 70% | 2851 fps | 99.6% |
| Bofors RP30 | <<locked>> | 80% | 38,174 psi | 60% | 2723 fps | 97.8% |
| Bofors RP5 | <<locked>> | 80% | 48,095 psi | 75% | 2913 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 38,580 psi | 60% | 2730 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 80% | 49,748 psi | 78% | 2910 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,892 psi | 77% | 2894 fps | 99.2% |
| Hodgdon Retumbo | 78 gr | 80% | 40,132 psi | 63% | 2848 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,384 psi | 44% | 1759 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,357 psi | 79% | 2894 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 80% | 46,238 psi | 72% | 2897 fps | 99.3% |
| IMR 7977 Enduron | <<locked>> | 88% | 52,373 psi | 82% | 2900 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 82% | 32,242 psi | 51% | 2585 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 41,017 psi | 64% | 2697 fps | 100% |
| Norma 217 | <<locked>> | 80% | 30,327 psi | 48% | 2549 fps | 96.8% |
| Norma MRP | <<locked>> | 80% | 51,605 psi | 81% | 2989 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 46,992 psi | 74% | 2917 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 80% | 42,221 psi | 66% | 2782 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,298 psi | 46% | 1804 fps | 100% |
| ReloadSwiss RS 76 | 83.5 gr | 80% | 39,740 psi | 62% | 2822 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 36,448 psi | 57% | 2703 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 52,591 psi | 82% | 2936 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 51,692 psi | 81% | 2949 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 45,469 psi | 71% | 2848 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,343 psi | 80% | 2943 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 53,809 psi | 84% | 2927 fps | 99.7% |
| Somchem S385 | <<locked>> | 80% | 51,837 psi | 81% | 2913 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,585 psi | 71% | 2792 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 86% | 47,906 psi | 75% | 2861 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 80% | 51,605 psi | 81% | 2913 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,068 psi | 80% | 2992 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 80% | 42,409 psi | 66% | 2799 fps | 98.3% |
| Vihtavuori N568 | <<locked>> | 80% | 37,536 psi | 59% | 2723 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 86% | 44,657 psi | 70% | 2920 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,572 psi | 73% | 2910 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,182 psi | 76% | 2854 fps | 99.9% |
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 | Barnes TSX FB. ADI AR 2218 delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,965 fps to 3,156 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 59–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:10.0 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, ReloadSwiss RS 76 rank at the top here: for 7 mm KM Katzmaier with the .284 | 160gr | Barnes TSX FB 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.