Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 140gr | SAKO Powerhead Blade Pro bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, 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>> | 86% | 54,621 psi | 86% | 3097 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 57,609 psi | 90% | 3271 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 84% | 55,564 psi | 87% | 3189 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 86% | 54,201 psi | 85% | 3199 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 96% | 57,145 psi | 90% | 3238 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 98% | 53,722 psi | 84% | 3284 fps | 97.7% |
| ADI AR 2225 | <<locked>> | 98% | 56,362 psi | 88% | 3264 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 55,317 psi | 87% | 3179 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 86% | 54,737 psi | 86% | 3196 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 56,652 psi | 89% | 3159 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 57,290 psi | 90% | 3238 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 57,609 psi | 90% | 3251 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 55,666 psi | 87% | 3264 fps | 97.9% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 55,579 psi | 87% | 3255 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 54,897 psi | 86% | 3156 fps | 97.9% |
| Bofors RP15 | <<locked>> | 88% | 54,172 psi | 85% | 3186 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 57,116 psi | 90% | 3255 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 54,737 psi | 86% | 3196 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 92% | 54,607 psi | 86% | 3199 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 86% | 57,101 psi | 89% | 3196 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,927 psi | 88% | 3176 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,985 psi | 88% | 3094 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,376 psi | 88% | 3330 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,652 psi | 59% | 2080 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,696 psi | 90% | 3163 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 57,319 psi | 90% | 3169 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 88% | 56,507 psi | 89% | 3248 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 55,274 psi | 87% | 3235 fps | 99.8% |
| Lovex S071 | <<locked>> | 92% | 56,550 psi | 89% | 3127 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 56,507 psi | 89% | 3261 fps | 100% |
| Norma MRP | <<locked>> | 84% | 54,824 psi | 86% | 3212 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 53,766 psi | 84% | 3202 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 90% | 56,507 psi | 89% | 3192 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,725 psi | 61% | 2133 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 57,566 psi | 90% | 3314 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 56,971 psi | 89% | 3278 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 84% | 56,043 psi | 88% | 3153 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 84% | 55,114 psi | 86% | 3169 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 54,766 psi | 86% | 3166 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 57,682 psi | 90% | 3143 fps | 99.5% |
| Somchem S385 | <<locked>> | 84% | 55,463 psi | 87% | 3136 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 55,550 psi | 87% | 3120 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 54,781 psi | 86% | 3136 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 54,795 psi | 86% | 3136 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 54,259 psi | 85% | 3212 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 90% | 55,521 psi | 87% | 3209 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 94% | 57,203 psi | 90% | 3278 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 94% | 54,491 psi | 85% | 3274 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 88% | 57,116 psi | 90% | 3255 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 55,216 psi | 87% | 3130 fps | 99.9% |
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% | 44,570 psi | 70% | 2920 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 80% | 46,470 psi | 73% | 3058 fps | 97.3% |
| ADI AR 2209 | <<locked>> | 80% | 48,631 psi | 76% | 3064 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 80% | 43,932 psi | 69% | 3002 fps | 97.8% |
| ADI AR 2217 | <<locked>> | 82% | 35,027 psi | 55% | 2776 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 94% | 46,311 psi | 73% | 3123 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 30,008 psi | 47% | 2671 fps | 95.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,472 psi | 76% | 3051 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,701 psi | 70% | 3005 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,308 psi | 68% | 2940 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,623 psi | 59% | 2871 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,472 psi | 78% | 3120 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 47,776 psi | 75% | 3117 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 96% | 47,688 psi | 75% | 3100 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 45,136 psi | 71% | 2966 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 41,568 psi | 65% | 2936 fps | 98.1% |
| Bofors RP30 | <<locked>> | 80% | 35,114 psi | 55% | 2792 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 44,701 psi | 70% | 3005 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 80% | 35,563 psi | 56% | 2795 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 80% | 46,470 psi | 73% | 2999 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,658 psi | 72% | 2982 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,373 psi | 82% | 3041 fps | 100% |
| Hodgdon Retumbo | 77.9 gr | 80% | 36,666 psi | 57% | 2910 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,282 psi | 44% | 1867 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 54,157 psi | 85% | 3107 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,253 psi | 74% | 2986 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 80% | 42,685 psi | 67% | 2979 fps | 97.5% |
| IMR 8133 Enduron | <<locked>> | 88% | 36,477 psi | 57% | 2844 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 38,377 psi | 60% | 2789 fps | 99.2% |
| Norma 217 | <<locked>> | 84% | 32,039 psi | 50% | 2740 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 47,601 psi | 75% | 3084 fps | 99.9% |
| Ramshot Grand | <<locked>> | 80% | 42,859 psi | 67% | 2989 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 80% | 38,667 psi | 61% | 2854 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,022 psi | 45% | 1913 fps | 100% |
| ReloadSwiss RS 76 | 83.4 gr | 80% | 36,172 psi | 57% | 2884 fps | 98.6% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 38,783 psi | 61% | 2907 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 49,240 psi | 77% | 3031 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 80% | 48,109 psi | 75% | 3045 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,761 psi | 75% | 3041 fps | 99.4% |
| Somchem S361 | <<locked>> | 80% | 50,473 psi | 79% | 3022 fps | 98.6% |
| Somchem S385 | <<locked>> | 80% | 48,631 psi | 76% | 3018 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 42,453 psi | 67% | 2881 fps | 98.9% |
| Vihtavuori N170 | <<locked>> | 90% | 51,227 psi | 80% | 3068 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 80% | 48,037 psi | 75% | 3022 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,166 psi | 74% | 3074 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 80% | 39,233 psi | 61% | 2874 fps | 96.1% |
| Vihtavuori N568 | <<locked>> | 86% | 42,873 psi | 67% | 2999 fps | 96% |
| Vihtavuori N570 | 91 gr | 90% | 47,137 psi | 74% | 3127 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,945 psi | 66% | 2999 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,860 psi | 70% | 2943 fps | 98.9% |
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 | SAKO Powerhead Blade Pro. Hodgdon Retumbo delivers the highest muzzle velocity at 3,330 fps; across all powders the maximum-charge window runs from 2,080 fps to 3,330 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 1:9.0 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 7 mm KM Katzmaier with the .284 | 140gr | SAKO Powerhead Blade Pro they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, 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.