Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 145gr | Speer Hot-Cor bullet and 49 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% | 54,984 psi | 86% | 3058 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 50,749 psi | 80% | 3071 fps | 96.8% |
| Accurate MAGPRO | <<locked>> | 82% | 54,027 psi | 85% | 3159 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 82% | 55,680 psi | 87% | 3146 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,723 psi | 86% | 3163 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 92% | 54,114 psi | 85% | 3143 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 96% | 54,766 psi | 86% | 3264 fps | 98.5% |
| ADI AR 2225 | <<locked>> | 94% | 53,882 psi | 84% | 3166 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,434 psi | 87% | 3136 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,347 psi | 87% | 3159 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 57,348 psi | 90% | 3117 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,331 psi | 85% | 3140 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 56,898 psi | 89% | 3241 fps | 98.5% |
| Alliant Reloder-50 | <<locked>> | 98% | 57,203 psi | 90% | 3232 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,013 psi | 86% | 3117 fps | 98.3% |
| Bofors RP15 | <<locked>> | 86% | 54,766 psi | 86% | 3150 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,259 psi | 85% | 3156 fps | 99.9% |
| Bofors RP5 | <<locked>> | 84% | 55,347 psi | 87% | 3159 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,477 psi | 87% | 3166 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 57,116 psi | 90% | 3153 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,188 psi | 88% | 3136 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 88% | 53,867 psi | 84% | 3232 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,855 psi | 59% | 2067 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 57,203 psi | 90% | 3127 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 86% | 57,072 psi | 89% | 3209 fps | 99.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 56,768 psi | 89% | 3209 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 57,188 psi | 90% | 3091 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,346 psi | 85% | 3173 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,361 psi | 87% | 3173 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,563 psi | 86% | 3166 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 57,232 psi | 90% | 3153 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,943 psi | 61% | 2116 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 54,708 psi | 86% | 3212 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 53,867 psi | 84% | 3176 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 82% | 55,999 psi | 88% | 3114 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 82% | 55,317 psi | 87% | 3130 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,663 psi | 83% | 3084 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 54,955 psi | 86% | 3123 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 57,464 psi | 90% | 3100 fps | 99.7% |
| Somchem S385 | <<locked>> | 82% | 55,550 psi | 87% | 3094 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 55,811 psi | 87% | 3084 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,303 psi | 87% | 3107 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 82% | 55,274 psi | 87% | 3094 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,665 psi | 86% | 3173 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 88% | 56,231 psi | 88% | 3173 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 90% | 54,404 psi | 85% | 3182 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 92% | 55,825 psi | 87% | 3248 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 84% | 54,375 psi | 85% | 3153 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,448 psi | 87% | 3091 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% | 48,080 psi | 75% | 2943 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 47,079 psi | 74% | 3002 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 80% | 50,386 psi | 79% | 3091 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 80% | 52,069 psi | 82% | 3081 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 47,514 psi | 74% | 3031 fps | 98.9% |
| ADI AR 2217 | <<locked>> | 80% | 35,433 psi | 56% | 2749 fps | 96% |
| ADI AR 2218 | 97.2 gr | 90% | 43,845 psi | 69% | 3025 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 32,779 psi | 51% | 2713 fps | 98% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,953 psi | 81% | 3074 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,283 psi | 76% | 3031 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,891 psi | 73% | 2953 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,060 psi | 64% | 2897 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 45,339 psi | 71% | 3015 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 92% | 45,600 psi | 71% | 3009 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,150 psi | 71% | 2927 fps | 96% |
| Bofors RP15 | <<locked>> | 80% | 44,860 psi | 70% | 2959 fps | 99.1% |
| Bofors RP30 | <<locked>> | 80% | 38,435 psi | 60% | 2831 fps | 97.1% |
| Bofors RP5 | <<locked>> | 80% | 48,283 psi | 76% | 3031 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 80% | 38,638 psi | 61% | 2831 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 80% | 49,835 psi | 78% | 3022 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,008 psi | 77% | 3009 fps | 98.7% |
| Hodgdon Retumbo | 81.5 gr | 80% | 40,176 psi | 63% | 2956 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,471 psi | 45% | 1854 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,227 psi | 79% | 3005 fps | 99% |
| IMR 7828 SSC | <<locked>> | 80% | 46,195 psi | 72% | 3009 fps | 98.7% |
| IMR 8133 Enduron | <<locked>> | 84% | 34,983 psi | 55% | 2756 fps | 95.6% |
| Lovex S071 | <<locked>> | 80% | 41,452 psi | 65% | 2812 fps | 99.8% |
| Norma 217 | <<locked>> | 80% | 30,661 psi | 48% | 2651 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 51,590 psi | 81% | 3107 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 46,934 psi | 74% | 3028 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 80% | 42,424 psi | 66% | 2890 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,211 psi | 46% | 1896 fps | 100% |
| ReloadSwiss RS 76 | 87.2 gr | 80% | 39,856 psi | 62% | 2927 fps | 99.7% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 39,653 psi | 62% | 2881 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 52,460 psi | 82% | 3051 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 51,764 psi | 81% | 3068 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 49,240 psi | 77% | 3022 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,416 psi | 81% | 3064 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 53,824 psi | 84% | 3041 fps | 99.4% |
| Somchem S385 | <<locked>> | 80% | 52,112 psi | 82% | 3038 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,687 psi | 72% | 2907 fps | 99.6% |
| Vihtavuori N170 | <<locked>> | 86% | 48,153 psi | 75% | 2969 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 51,750 psi | 81% | 3038 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 50,995 psi | 80% | 3104 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 80% | 42,743 psi | 67% | 2910 fps | 97.7% |
| Vihtavuori N568 | <<locked>> | 82% | 40,698 psi | 64% | 2900 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 86% | 44,788 psi | 70% | 3025 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,659 psi | 73% | 3025 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,153 psi | 75% | 2966 fps | 99.6% |
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 | Speer Hot-Cor. ADI AR 2218 delivers the highest muzzle velocity at 3,264 fps; across all powders the maximum-charge window runs from 2,067 fps to 3,264 fps. Accurate 8700 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 1:13.0 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 | 145gr | Speer Hot-Cor 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.