Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 145gr | Hasler Hunting 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% | 55,303 psi | 87% | 3068 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 54,549 psi | 85% | 3176 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 84% | 56,710 psi | 89% | 3166 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,361 psi | 87% | 3179 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 54,447 psi | 85% | 3153 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 98% | 55,100 psi | 86% | 3274 fps | 98.4% |
| ADI AR 2225 | <<locked>> | 96% | 53,780 psi | 84% | 3176 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,173 psi | 88% | 3150 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 55,753 psi | 87% | 3169 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 57,725 psi | 90% | 3130 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 54,520 psi | 85% | 3150 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,447 psi | 85% | 3159 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 57,116 psi | 90% | 3251 fps | 98.5% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 56,753 psi | 89% | 3232 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,869 psi | 88% | 3133 fps | 98.4% |
| Bofors RP15 | <<locked>> | 88% | 55,172 psi | 86% | 3159 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 54,375 psi | 85% | 3163 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 55,753 psi | 87% | 3169 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 55,840 psi | 88% | 3176 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 54,085 psi | 85% | 3104 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 86% | 56,985 psi | 89% | 3153 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 56,666 psi | 89% | 3064 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 53,867 psi | 84% | 3241 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,768 psi | 59% | 2057 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,563 psi | 86% | 3087 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 88% | 57,725 psi | 90% | 3222 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,536 psi | 89% | 3215 fps | 100% |
| Lovex S071 | <<locked>> | 92% | 57,290 psi | 90% | 3097 fps | 100% |
| Norma 217 | <<locked>> | 98% | 53,969 psi | 85% | 3176 fps | 100% |
| Norma MRP | <<locked>> | 84% | 55,898 psi | 88% | 3186 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,013 psi | 86% | 3179 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 53,490 psi | 84% | 3100 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,682 psi | 61% | 2103 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,694 psi | 86% | 3222 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 53,867 psi | 84% | 3182 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 84% | 57,072 psi | 89% | 3133 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 55,956 psi | 88% | 3143 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,579 psi | 87% | 3140 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 54,694 psi | 86% | 3058 fps | 99.4% |
| Somchem S385 | <<locked>> | 84% | 56,159 psi | 88% | 3107 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,289 psi | 88% | 3094 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 55,695 psi | 87% | 3117 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 84% | 55,492 psi | 87% | 3104 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,288 psi | 87% | 3189 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 90% | 56,405 psi | 88% | 3179 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 92% | 54,462 psi | 85% | 3189 fps | 99% |
| Vihtavuori N570 | <<locked>> | 94% | 55,782 psi | 87% | 3255 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,273 psi | 85% | 3163 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,159 psi | 88% | 3107 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% | 44,904 psi | 70% | 2887 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 47,094 psi | 74% | 3035 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 80% | 49,414 psi | 77% | 3038 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 44,527 psi | 70% | 2976 fps | 98.2% |
| ADI AR 2217 | <<locked>> | 82% | 35,447 psi | 56% | 2753 fps | 95.8% |
| ADI AR 2218 | 96.2 gr | 92% | 43,903 psi | 69% | 3035 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 30,240 psi | 47% | 2644 fps | 96.6% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,197 psi | 77% | 3028 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,194 psi | 71% | 2976 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,961 psi | 69% | 2907 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,218 psi | 60% | 2844 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,444 psi | 79% | 3094 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 45,208 psi | 71% | 3022 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 96% | 48,646 psi | 76% | 3081 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 42,859 psi | 67% | 2881 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 41,989 psi | 66% | 2904 fps | 98.5% |
| Bofors RP30 | <<locked>> | 80% | 35,520 psi | 56% | 2766 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 45,194 psi | 71% | 2976 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 80% | 36,027 psi | 56% | 2772 fps | 96.7% |
| Hodgdon H4831 | <<locked>> | 80% | 47,152 psi | 74% | 2976 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,180 psi | 72% | 2956 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,026 psi | 83% | 3009 fps | 100% |
| Hodgdon Retumbo | 78.9 gr | 80% | 37,231 psi | 58% | 2890 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,210 psi | 44% | 1841 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,906 psi | 75% | 2966 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 80% | 43,279 psi | 68% | 2953 fps | 98% |
| IMR 8133 Enduron | <<locked>> | 86% | 34,360 psi | 54% | 2746 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 38,464 psi | 60% | 2753 fps | 99.4% |
| Norma 217 | <<locked>> | 82% | 29,979 psi | 47% | 2641 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 48,341 psi | 76% | 3054 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 43,656 psi | 68% | 2969 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 80% | 39,218 psi | 61% | 2828 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,066 psi | 46% | 1886 fps | 100% |
| ReloadSwiss RS 76 | 84.5 gr | 80% | 36,753 psi | 58% | 2861 fps | 99% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 39,378 psi | 62% | 2884 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 49,980 psi | 78% | 3012 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 48,820 psi | 77% | 3018 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,486 psi | 76% | 3012 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 51,068 psi | 80% | 2995 fps | 99% |
| Somchem S385 | <<locked>> | 80% | 49,037 psi | 77% | 2986 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 42,960 psi | 67% | 2854 fps | 99.2% |
| Vihtavuori N170 | <<locked>> | 90% | 51,866 psi | 81% | 3048 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 80% | 48,588 psi | 76% | 2992 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,892 psi | 75% | 3051 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 80% | 39,610 psi | 62% | 2848 fps | 96.6% |
| Vihtavuori N568 | <<locked>> | 84% | 40,393 psi | 63% | 2900 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 90% | 48,080 psi | 75% | 3107 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,004 psi | 67% | 2972 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,455 psi | 71% | 2917 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 57 powders for 7 mm KM Katzmaier loaded with the .284 | 145gr | Hasler Hunting. ADI AR 2218 delivers the highest muzzle velocity at 3,274 fps; across all powders the maximum-charge window runs from 2,057 fps to 3,274 fps. Accurate 8700 gives the best case fill at 100 %, and 57 of the 57 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. Accurate 8700, Alliant Reloder-50, Hodgdon TrailBoss 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 | Hasler Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon US 869, Lovex D100, Ramshot LRT 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.