Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 145gr | Fox Classic Hunter bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and ADI AR 2218.
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>> | 86% | 54,940 psi | 86% | 3061 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 54,375 psi | 85% | 3169 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 84% | 56,304 psi | 88% | 3159 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,158 psi | 86% | 3176 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 94% | 54,259 psi | 85% | 3153 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 98% | 54,795 psi | 86% | 3268 fps | 98.3% |
| ADI AR 2225 | <<locked>> | 98% | 57,479 psi | 90% | 3232 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 55,999 psi | 88% | 3146 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 55,579 psi | 87% | 3166 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 57,334 psi | 90% | 3127 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 54,331 psi | 85% | 3146 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,041 psi | 85% | 3153 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 56,782 psi | 89% | 3245 fps | 98.4% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 56,434 psi | 88% | 3228 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,767 psi | 87% | 3133 fps | 98.3% |
| Bofors RP15 | <<locked>> | 88% | 54,984 psi | 86% | 3156 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 54,027 psi | 85% | 3159 fps | 99.8% |
| Bofors RP5 | <<locked>> | 86% | 55,579 psi | 87% | 3166 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 55,680 psi | 87% | 3173 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 53,896 psi | 84% | 3100 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 86% | 56,797 psi | 89% | 3150 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 56,463 psi | 88% | 3058 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 57,624 psi | 90% | 3304 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,652 psi | 59% | 2054 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,244 psi | 85% | 3081 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 88% | 57,537 psi | 90% | 3219 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,144 psi | 88% | 3209 fps | 99.9% |
| Lovex S071 | <<locked>> | 92% | 56,913 psi | 89% | 3091 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 57,435 psi | 90% | 3228 fps | 100% |
| Norma MRP | <<locked>> | 84% | 55,709 psi | 87% | 3182 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 54,824 psi | 86% | 3176 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 90% | 57,421 psi | 90% | 3163 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,711 psi | 61% | 2100 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,288 psi | 85% | 3215 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 53,534 psi | 84% | 3176 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 84% | 56,710 psi | 89% | 3127 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 55,767 psi | 87% | 3140 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,390 psi | 87% | 3136 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 54,549 psi | 85% | 3054 fps | 99.4% |
| Somchem S385 | <<locked>> | 84% | 55,985 psi | 88% | 3104 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,130 psi | 88% | 3091 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 55,376 psi | 87% | 3107 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 84% | 55,288 psi | 87% | 3100 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,100 psi | 86% | 3186 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 90% | 56,043 psi | 88% | 3176 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 92% | 54,114 psi | 85% | 3182 fps | 98.9% |
| Vihtavuori N570 | <<locked>> | 94% | 55,637 psi | 87% | 3251 fps | 97.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,012 psi | 85% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,014 psi | 88% | 3104 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% | 44,715 psi | 70% | 2884 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 46,920 psi | 74% | 3028 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 80% | 49,226 psi | 77% | 3035 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 44,338 psi | 69% | 2969 fps | 98.2% |
| ADI AR 2217 | <<locked>> | 82% | 35,288 psi | 55% | 2749 fps | 95.7% |
| ADI AR 2218 | 97.9 gr | 94% | 47,094 psi | 74% | 3107 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 80% | 30,095 psi | 47% | 2641 fps | 96.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,023 psi | 77% | 3025 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,005 psi | 71% | 2972 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,758 psi | 69% | 2904 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,014 psi | 60% | 2838 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,038 psi | 78% | 3084 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 44,875 psi | 70% | 3015 fps | 95.4% |
| Alliant Reloder-50 | <<locked>> | 96% | 48,327 psi | 76% | 3074 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 42,598 psi | 67% | 2874 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 41,800 psi | 66% | 2900 fps | 98.4% |
| Bofors RP30 | <<locked>> | 80% | 35,302 psi | 55% | 2759 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 45,005 psi | 71% | 2972 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 80% | 35,737 psi | 56% | 2766 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 80% | 46,818 psi | 73% | 2969 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,006 psi | 72% | 2953 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,823 psi | 83% | 3005 fps | 100% |
| Hodgdon Retumbo | 78.6 gr | 80% | 37,057 psi | 58% | 2884 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,195 psi | 44% | 1841 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,747 psi | 75% | 2959 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 80% | 43,091 psi | 68% | 2949 fps | 97.9% |
| IMR 8133 Enduron | <<locked>> | 86% | 34,214 psi | 54% | 2746 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 38,276 psi | 60% | 2749 fps | 99.4% |
| Norma 217 | <<locked>> | 82% | 29,820 psi | 47% | 2638 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 48,124 psi | 75% | 3051 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 43,453 psi | 68% | 2963 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 80% | 39,015 psi | 61% | 2825 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,066 psi | 46% | 1886 fps | 100% |
| ReloadSwiss RS 76 | 84.1 gr | 80% | 36,448 psi | 57% | 2854 fps | 98.9% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 39,218 psi | 61% | 2877 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 49,777 psi | 78% | 3005 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 48,588 psi | 76% | 3012 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,283 psi | 76% | 3009 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 50,894 psi | 80% | 2992 fps | 98.9% |
| Somchem S385 | <<locked>> | 80% | 48,834 psi | 77% | 2982 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 42,801 psi | 67% | 2851 fps | 99.2% |
| Vihtavuori N170 | <<locked>> | 90% | 51,735 psi | 81% | 3045 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 80% | 48,385 psi | 76% | 2986 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,718 psi | 75% | 3048 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 80% | 39,436 psi | 62% | 2841 fps | 96.5% |
| Vihtavuori N568 | <<locked>> | 84% | 40,234 psi | 63% | 2897 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 90% | 47,892 psi | 75% | 3100 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 42,612 psi | 67% | 2966 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,295 psi | 71% | 2910 fps | 99.2% |
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 49 powders for 7 mm KM Katzmaier loaded with the .284 | 145gr | Fox Classic Hunter. Hodgdon Retumbo delivers the highest muzzle velocity at 3,304 fps; across all powders the maximum-charge window runs from 2,054 fps to 3,304 fps. Alliant Reloder-50 gives the best case fill at 100 %, and 49 of the 49 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 145.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-50, Hodgdon TrailBoss, IMR 8133 Enduron 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. Hodgdon Retumbo, ReloadSwiss RS 76, ADI AR 2218 rank at the top here: for 7 mm KM Katzmaier with the .284 | 145gr | Fox Classic Hunter 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.