Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 145gr | Brenneke Teilmantel bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Hodgdon H1000 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% | 54,897 psi | 86% | 3003 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 50,836 psi | 80% | 3012 fps | 96.1% |
| Accurate MAGPRO | <<locked>> | 84% | 55,071 psi | 86% | 3176 fps | 99% |
| ADI AR 2209 | <<locked>> | 82% | 55,782 psi | 87% | 3091 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 84% | 54,636 psi | 86% | 3103 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 92% | 54,041 psi | 85% | 3084 fps | 99.7% |
| ADI AR 2218 | <<locked>> | 96% | 54,708 psi | 86% | 3195 fps | 97.9% |
| ADI AR 2225 | <<locked>> | 96% | 57,696 psi | 90% | 3171 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,347 psi | 87% | 3079 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,259 psi | 87% | 3100 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 86% | 57,261 psi | 90% | 3065 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,244 psi | 85% | 3082 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 56,840 psi | 89% | 3176 fps | 98% |
| Alliant Reloder-50 | <<locked>> | 96% | 52,953 psi | 83% | 3092 fps | 96.6% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 54,955 psi | 86% | 3059 fps | 97.9% |
| Bofors RP15 | <<locked>> | 86% | 54,694 psi | 86% | 3150 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,186 psi | 85% | 3096 fps | 99.7% |
| Bofors RP5 | <<locked>> | 84% | 55,259 psi | 87% | 3159 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 55,593 psi | 87% | 3169 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 57,217 psi | 90% | 3099 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,101 psi | 88% | 3081 fps | 99.4% |
| Hodgdon Retumbo | <<locked>> | 88% | 53,780 psi | 84% | 3232 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,899 psi | 61% | 2039 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,797 psi | 89% | 3039 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 57,116 psi | 90% | 3130 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 84% | 56,782 psi | 89% | 3148 fps | 99.7% |
| IMR 8133 Enduron | <<locked>> | 96% | 52,924 psi | 83% | 3085 fps | 99.5% |
| Lovex S071 | <<locked>> | 90% | 57,101 psi | 89% | 3037 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,259 psi | 85% | 3110 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,274 psi | 87% | 3113 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 57,058 psi | 89% | 3152 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 84% | 54,447 psi | 85% | 3056 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,320 psi | 62% | 2087 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 54,636 psi | 86% | 3152 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 53,795 psi | 84% | 3111 fps | 99% |
| Rottweil R 904 | <<locked>> | 82% | 55,912 psi | 88% | 3058 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 82% | 55,230 psi | 87% | 3072 fps | 99.9% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 54,056 psi | 85% | 3024 fps | 96.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 54,911 psi | 86% | 3123 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 57,392 psi | 90% | 3046 fps | 99.5% |
| Somchem S385 | <<locked>> | 82% | 55,506 psi | 87% | 3038 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 57,595 psi | 90% | 3059 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 57,029 psi | 89% | 3077 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 82% | 55,201 psi | 87% | 3041 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,651 psi | 87% | 3133 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 88% | 56,144 psi | 88% | 3112 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 90% | 54,302 psi | 85% | 3118 fps | 98.6% |
| Vihtavuori N570 | <<locked>> | 92% | 56,260 psi | 88% | 3184 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 54,302 psi | 85% | 3096 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,304 psi | 88% | 3051 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% | 48,037 psi | 75% | 2889 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 47,036 psi | 74% | 2941 fps | 95% |
| Accurate MAGPRO | <<locked>> | 80% | 47,732 psi | 75% | 3038 fps | 97.6% |
| ADI AR 2209 | <<locked>> | 80% | 51,982 psi | 81% | 3025 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 47,427 psi | 74% | 2970 fps | 98.5% |
| ADI AR 2217 | <<locked>> | 80% | 35,360 psi | 55% | 2688 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 92% | 47,094 psi | 74% | 3036 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 32,706 psi | 51% | 2651 fps | 97.1% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,866 psi | 81% | 3019 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,196 psi | 76% | 2971 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,818 psi | 73% | 2900 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,973 psi | 64% | 2839 fps | 99.9% |
| Alliant Reloder-33 | <<locked>> | 90% | 48,849 psi | 77% | 3026 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 94% | 49,095 psi | 77% | 3017 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,092 psi | 71% | 2869 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 44,802 psi | 70% | 2963 fps | 99.2% |
| Bofors RP30 | <<locked>> | 80% | 38,377 psi | 60% | 2769 fps | 96.3% |
| Bofors RP5 | <<locked>> | 80% | 48,196 psi | 76% | 3035 fps | 99.7% |
| Hodgdon H1000 | 80.1 gr | 80% | 36,318 psi | 57% | 2779 fps | 97% |
| Hodgdon H4831 | <<locked>> | 80% | 43,918 psi | 69% | 2847 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,950 psi | 77% | 2950 fps | 98.3% |
| Hodgdon Retumbo | 81.4 gr | 80% | 40,089 psi | 63% | 2956 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,500 psi | 45% | 1828 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,374 psi | 84% | 2987 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,154 psi | 79% | 3009 fps | 99% |
| IMR 7828 SSC | <<locked>> | 80% | 49,284 psi | 77% | 3014 fps | 98.9% |
| IMR 8133 Enduron | <<locked>> | 86% | 37,507 psi | 59% | 2761 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 41,394 psi | 65% | 2758 fps | 99.6% |
| Norma 217 | <<locked>> | 82% | 32,953 psi | 52% | 2653 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 51,503 psi | 81% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 52,765 psi | 83% | 3079 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 80% | 46,601 psi | 73% | 2919 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,254 psi | 46% | 1871 fps | 100% |
| ReloadSwiss RS 76 | 87.1 gr | 80% | 39,769 psi | 62% | 2864 fps | 99.3% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 39,581 psi | 62% | 2814 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 52,388 psi | 82% | 2998 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 80% | 51,677 psi | 81% | 3010 fps | 99.7% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 50,575 psi | 79% | 2958 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,329 psi | 80% | 3064 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 53,780 psi | 84% | 2986 fps | 99.1% |
| Somchem S385 | <<locked>> | 80% | 52,025 psi | 82% | 2981 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 44,266 psi | 69% | 2825 fps | 99.1% |
| Vihtavuori N170 | <<locked>> | 94% | 53,476 psi | 84% | 3014 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 80% | 51,677 psi | 81% | 2983 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,385 psi | 76% | 2997 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 80% | 42,670 psi | 67% | 2851 fps | 97% |
| Vihtavuori N568 | <<locked>> | 84% | 43,671 psi | 68% | 2904 fps | 96% |
| Vihtavuori N570 | <<locked>> | 88% | 48,559 psi | 76% | 3038 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,543 psi | 73% | 2969 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 52,504 psi | 82% | 2987 fps | 99.8% |
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 | 145gr | Brenneke Teilmantel. Hodgdon Retumbo delivers the highest muzzle velocity at 3,232 fps; across all powders the maximum-charge window runs from 2,039 fps to 3,232 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 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. Hodgdon Retumbo, Hodgdon H1000, ReloadSwiss RS 76 rank at the top here: for 7 mm KM Katzmaier with the .284 | 145gr | Brenneke Teilmantel 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.