Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 150gr | Rhino Solid Shank 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, 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>> | 84% | 55,796 psi | 87% | 3028 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 51,677 psi | 81% | 3054 fps | 97.4% |
| Accurate MAGPRO | <<locked>> | 82% | 54,766 psi | 86% | 3133 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 82% | 56,420 psi | 88% | 3114 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,390 psi | 87% | 3133 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 92% | 54,969 psi | 86% | 3117 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 55,680 psi | 87% | 3241 fps | 98.9% |
| ADI AR 2225 | <<locked>> | 94% | 54,694 psi | 86% | 3140 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,159 psi | 88% | 3104 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,999 psi | 88% | 3127 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 54,288 psi | 85% | 3031 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,114 psi | 86% | 3110 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 53,606 psi | 84% | 3143 fps | 98.2% |
| Alliant Reloder-50 | <<locked>> | 96% | 53,853 psi | 84% | 3136 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,709 psi | 87% | 3091 fps | 98.7% |
| Bofors RP15 | <<locked>> | 86% | 55,419 psi | 87% | 3117 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,085 psi | 86% | 3130 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 55,999 psi | 88% | 3127 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 56,391 psi | 88% | 3136 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 54,012 psi | 85% | 3058 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,797 psi | 89% | 3107 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 88% | 54,781 psi | 86% | 3202 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,971 psi | 60% | 2034 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 54,186 psi | 85% | 3035 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 84% | 53,954 psi | 85% | 3114 fps | 99.8% |
| IMR 7977 Enduron | <<locked>> | 90% | 56,507 psi | 89% | 3045 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 57,566 psi | 90% | 3182 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 54,317 psi | 85% | 3005 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,158 psi | 86% | 3143 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,072 psi | 88% | 3136 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 55,376 psi | 87% | 3140 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 53,838 psi | 84% | 3058 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,073 psi | 61% | 2083 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 55,579 psi | 87% | 3182 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 54,708 psi | 86% | 3146 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 82% | 56,681 psi | 89% | 3081 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 55,912 psi | 88% | 3097 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 53,476 psi | 84% | 3061 fps | 97.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,550 psi | 87% | 3091 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,144 psi | 88% | 3058 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,449 psi | 88% | 3051 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,927 psi | 88% | 3077 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 55,854 psi | 88% | 3058 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,332 psi | 87% | 3143 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 88% | 57,014 psi | 89% | 3146 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 55,114 psi | 86% | 3153 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 92% | 56,695 psi | 89% | 3225 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 55,259 psi | 87% | 3120 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,086 psi | 88% | 3061 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% | 48,617 psi | 76% | 2910 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 44,469 psi | 70% | 2913 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 80% | 51,068 psi | 80% | 3064 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 80% | 52,750 psi | 83% | 3051 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,051 psi | 75% | 3002 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 80% | 35,984 psi | 56% | 2726 fps | 96.6% |
| ADI AR 2218 | 96.2 gr | 90% | 44,469 psi | 70% | 3009 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 33,315 psi | 52% | 2697 fps | 98.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,431 psi | 82% | 3041 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,820 psi | 77% | 3002 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,558 psi | 75% | 2923 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,727 psi | 65% | 2874 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 42,801 psi | 67% | 2927 fps | 95.2% |
| Alliant Reloder-50 | <<locked>> | 92% | 46,383 psi | 73% | 2992 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,643 psi | 72% | 2900 fps | 96.5% |
| Bofors RP15 | <<locked>> | 80% | 45,498 psi | 71% | 2936 fps | 99.4% |
| Bofors RP30 | <<locked>> | 80% | 38,943 psi | 61% | 2808 fps | 97.6% |
| Bofors RP5 | <<locked>> | 80% | 48,820 psi | 77% | 3002 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 39,131 psi | 61% | 2808 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 80% | 50,343 psi | 79% | 2992 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,516 psi | 78% | 2979 fps | 99% |
| Hodgdon Retumbo | 80.7 gr | 80% | 40,901 psi | 64% | 2933 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,485 psi | 45% | 1821 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,836 psi | 80% | 2976 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 80% | 46,934 psi | 74% | 2986 fps | 99.1% |
| IMR 7977 Enduron | <<locked>> | 88% | 52,924 psi | 83% | 2982 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 82% | 33,170 psi | 52% | 2674 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 42,003 psi | 66% | 2785 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 31,270 psi | 49% | 2635 fps | 96.6% |
| Norma MRP | <<locked>> | 80% | 52,243 psi | 82% | 3074 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,601 psi | 75% | 3002 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 80% | 43,062 psi | 67% | 2867 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,385 psi | 46% | 1867 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 40,640 psi | 64% | 2910 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,434 psi | 59% | 2792 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 53,069 psi | 83% | 3022 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 80% | 52,286 psi | 82% | 3035 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 46,543 psi | 73% | 2933 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,938 psi | 81% | 3028 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 52,634 psi | 82% | 3002 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,166 psi | 72% | 2877 fps | 99.8% |
| Vihtavuori N170 | <<locked>> | 86% | 48,776 psi | 76% | 2946 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 52,460 psi | 82% | 3009 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,619 psi | 81% | 3077 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 80% | 43,265 psi | 68% | 2884 fps | 98.1% |
| Vihtavuori N568 | <<locked>> | 80% | 38,421 psi | 60% | 2808 fps | 95.2% |
| Vihtavuori N570 | 90 gr | 86% | 45,556 psi | 71% | 3009 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,587 psi | 75% | 3002 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,820 psi | 77% | 2936 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 55 powders for 7 mm KM Katzmaier loaded with the .284 | 150gr | Rhino Solid Shank. ADI AR 2218 delivers the highest muzzle velocity at 3,241 fps; across all powders the maximum-charge window runs from 2,034 fps to 3,241 fps. Accurate 8700 gives the best case fill at 100 %, and 55 of the 55 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:12.5 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 | 150gr | Rhino Solid Shank 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.