Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 140gr | Rhino Solid Shank bullet and 48 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ADI AR 2218 and Vihtavuori N570.
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% | 57,029 psi | 89% | 3133 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 56,130 psi | 88% | 3241 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 82% | 54,085 psi | 85% | 3163 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 86% | 56,623 psi | 89% | 3238 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 55,956 psi | 88% | 3219 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 98% | 56,666 psi | 89% | 3340 fps | 98.5% |
| ADI AR 2225 | <<locked>> | 96% | 55,303 psi | 87% | 3238 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 57,290 psi | 90% | 3212 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 57,130 psi | 90% | 3235 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 55,390 psi | 87% | 3136 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 56,057 psi | 88% | 3215 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 56,057 psi | 88% | 3222 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 54,563 psi | 86% | 3241 fps | 97.8% |
| Alliant Reloder-50 | <<locked>> | 98% | 54,781 psi | 86% | 3232 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 57,043 psi | 89% | 3192 fps | 98.4% |
| Bofors RP15 | <<locked>> | 88% | 56,521 psi | 89% | 3222 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 55,941 psi | 88% | 3232 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 57,130 psi | 90% | 3235 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 57,392 psi | 90% | 3238 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 55,332 psi | 87% | 3163 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 54,418 psi | 85% | 3146 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 90% | 55,463 psi | 87% | 3307 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,869 psi | 59% | 2096 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,622 psi | 87% | 3146 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 86% | 55,071 psi | 86% | 3219 fps | 99.7% |
| IMR 8133 Enduron | <<locked>> | 98% | 54,418 psi | 85% | 3219 fps | 99.8% |
| Lovex S071 | <<locked>> | 90% | 55,332 psi | 87% | 3107 fps | 100% |
| Norma 217 | <<locked>> | 98% | 55,724 psi | 87% | 3238 fps | 100% |
| Norma MRP | <<locked>> | 84% | 57,319 psi | 90% | 3248 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 56,594 psi | 89% | 3248 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 55,158 psi | 86% | 3166 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,783 psi | 61% | 2142 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 56,550 psi | 89% | 3287 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 55,695 psi | 87% | 3248 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 82% | 54,520 psi | 85% | 3130 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 84% | 57,217 psi | 90% | 3205 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,840 psi | 89% | 3199 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,854 psi | 88% | 3117 fps | 99.4% |
| Somchem S385 | <<locked>> | 84% | 57,609 psi | 90% | 3169 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 54,070 psi | 85% | 3097 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 57,174 psi | 90% | 3176 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 84% | 57,058 psi | 89% | 3169 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 56,608 psi | 89% | 3251 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 88% | 54,273 psi | 85% | 3182 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 92% | 56,072 psi | 88% | 3255 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 94% | 57,537 psi | 90% | 3320 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 86% | 56,101 psi | 88% | 3228 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 57,450 psi | 90% | 3166 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% | 46,412 psi | 73% | 2953 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 48,559 psi | 76% | 3100 fps | 98% |
| ADI AR 2209 | <<locked>> | 80% | 50,531 psi | 79% | 3097 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 45,803 psi | 72% | 3035 fps | 98.3% |
| ADI AR 2217 | <<locked>> | 82% | 36,550 psi | 57% | 2815 fps | 96% |
| ADI AR 2218 | 98.5 gr | 92% | 45,252 psi | 71% | 3094 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 31,546 psi | 49% | 2713 fps | 96.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,299 psi | 79% | 3087 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,572 psi | 73% | 3041 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,339 psi | 71% | 2969 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,508 psi | 62% | 2907 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,098 psi | 82% | 3159 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 46,775 psi | 73% | 3087 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 94% | 46,978 psi | 74% | 3077 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,758 psi | 69% | 2936 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 43,381 psi | 68% | 2972 fps | 98.6% |
| Bofors RP30 | <<locked>> | 80% | 36,854 psi | 58% | 2831 fps | 96.1% |
| Bofors RP5 | <<locked>> | 80% | 46,572 psi | 73% | 3041 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 80% | 37,159 psi | 58% | 2835 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 80% | 48,225 psi | 76% | 3031 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,384 psi | 74% | 3015 fps | 98.1% |
| Hodgdon Retumbo | 80.9 gr | 80% | 38,595 psi | 60% | 2959 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,398 psi | 45% | 1880 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,892 psi | 77% | 3018 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 80% | 44,599 psi | 70% | 3018 fps | 98.1% |
| IMR 8133 Enduron | <<locked>> | 86% | 35,926 psi | 56% | 2822 fps | 95.6% |
| Lovex S071 | <<locked>> | 80% | 40,074 psi | 63% | 2822 fps | 99.6% |
| Norma 217 | <<locked>> | 82% | 31,502 psi | 49% | 2717 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 49,690 psi | 78% | 3117 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 45,034 psi | 71% | 3035 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 80% | 40,727 psi | 64% | 2897 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,138 psi | 46% | 1926 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,101 psi | 60% | 2927 fps | 99.2% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 41,002 psi | 64% | 2953 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 51,039 psi | 80% | 3068 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 50,009 psi | 78% | 3077 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,690 psi | 78% | 3074 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 52,301 psi | 82% | 3054 fps | 99% |
| Somchem S385 | <<locked>> | 80% | 50,430 psi | 79% | 3048 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 44,150 psi | 69% | 2917 fps | 99.3% |
| Vihtavuori N170 | <<locked>> | 88% | 49,879 psi | 78% | 3041 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 50,096 psi | 79% | 3054 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,168 psi | 77% | 3114 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 80% | 41,118 psi | 64% | 2913 fps | 96.8% |
| Vihtavuori N568 | <<locked>> | 84% | 41,989 psi | 66% | 2969 fps | 95.8% |
| Vihtavuori N570 | 92.3 gr | 88% | 46,224 psi | 72% | 3100 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 44,483 psi | 70% | 3035 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,717 psi | 73% | 2979 fps | 99.3% |
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 | 140gr | Rhino Solid Shank. ADI AR 2218 delivers the highest muzzle velocity at 3,340 fps; across all powders the maximum-charge window runs from 2,096 fps to 3,340 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 140.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, Hodgdon US 869 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, ADI AR 2218, Vihtavuori N570 rank at the top here: for 7 mm KM Katzmaier with the .284 | 140gr | Rhino Solid Shank they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon US 869, IMR 7977 Enduron, Lovex D100 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.