Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 150gr | Nosler SP SolBase 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% | 3025 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 51,721 psi | 81% | 3054 fps | 97.4% |
| Accurate MAGPRO | <<locked>> | 82% | 54,969 psi | 86% | 3136 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 82% | 56,463 psi | 88% | 3114 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,448 psi | 87% | 3136 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 92% | 55,013 psi | 86% | 3117 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 55,695 psi | 87% | 3241 fps | 98.9% |
| ADI AR 2225 | <<locked>> | 94% | 54,737 psi | 86% | 3140 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,173 psi | 88% | 3104 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 56,028 psi | 88% | 3127 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 54,520 psi | 85% | 3035 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,172 psi | 86% | 3110 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 53,838 psi | 84% | 3150 fps | 98.2% |
| Alliant Reloder-50 | <<locked>> | 96% | 54,027 psi | 85% | 3140 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,709 psi | 87% | 3091 fps | 98.7% |
| Bofors RP15 | <<locked>> | 86% | 55,651 psi | 87% | 3120 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,114 psi | 86% | 3130 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 56,028 psi | 88% | 3127 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 56,391 psi | 88% | 3136 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 54,070 psi | 85% | 3058 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,855 psi | 89% | 3107 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 88% | 54,824 psi | 86% | 3205 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,043 psi | 60% | 2037 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 54,215 psi | 85% | 3038 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 84% | 54,172 psi | 85% | 3120 fps | 99.8% |
| IMR 7977 Enduron | <<locked>> | 90% | 56,536 psi | 89% | 3045 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 57,609 psi | 90% | 3182 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 54,317 psi | 85% | 3005 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,361 psi | 87% | 3146 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,289 psi | 88% | 3143 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 55,434 psi | 87% | 3140 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 54,070 psi | 85% | 3064 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,001 psi | 61% | 2080 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 55,622 psi | 87% | 3186 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 54,897 psi | 86% | 3153 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 82% | 56,695 psi | 89% | 3084 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 56,130 psi | 88% | 3100 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 53,519 psi | 84% | 3064 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,767 psi | 87% | 3094 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,362 psi | 88% | 3064 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,507 psi | 89% | 3051 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,956 psi | 88% | 3081 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 56,101 psi | 88% | 3061 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,593 psi | 87% | 3150 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 57,058 psi | 89% | 3146 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 55,158 psi | 86% | 3156 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 92% | 56,710 psi | 89% | 3225 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 55,332 psi | 87% | 3123 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,115 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% | 48,791 psi | 76% | 2917 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 44,483 psi | 70% | 2913 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 80% | 51,082 psi | 80% | 3068 fps | 99% |
| ADI AR 2209 | <<locked>> | 80% | 52,794 psi | 83% | 3054 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,109 psi | 75% | 3002 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 80% | 36,013 psi | 56% | 2730 fps | 96.6% |
| ADI AR 2218 | 96.3 gr | 90% | 44,498 psi | 70% | 3009 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 33,373 psi | 52% | 2700 fps | 98.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,663 psi | 83% | 3048 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,863 psi | 77% | 3005 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,616 psi | 75% | 2923 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,785 psi | 65% | 2874 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 42,830 psi | 67% | 2927 fps | 95.2% |
| Alliant Reloder-50 | <<locked>> | 92% | 46,601 psi | 73% | 2995 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,658 psi | 72% | 2900 fps | 96.5% |
| Bofors RP15 | <<locked>> | 80% | 45,556 psi | 71% | 2936 fps | 99.4% |
| Bofors RP30 | <<locked>> | 80% | 39,131 psi | 61% | 2812 fps | 97.7% |
| Bofors RP5 | <<locked>> | 80% | 48,863 psi | 77% | 3005 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 39,305 psi | 62% | 2812 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 80% | 50,560 psi | 79% | 2999 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,545 psi | 78% | 2979 fps | 99% |
| Hodgdon Retumbo | 80.8 gr | 80% | 40,930 psi | 64% | 2933 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,558 psi | 45% | 1824 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,850 psi | 80% | 2976 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 80% | 46,963 psi | 74% | 2986 fps | 99.1% |
| IMR 7977 Enduron | <<locked>> | 88% | 52,968 psi | 83% | 2982 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 82% | 33,228 psi | 52% | 2674 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 42,032 psi | 66% | 2785 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 31,314 psi | 49% | 2635 fps | 96.6% |
| Norma MRP | <<locked>> | 80% | 52,460 psi | 82% | 3077 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,834 psi | 75% | 3005 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 80% | 43,091 psi | 68% | 2867 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,341 psi | 46% | 1867 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 40,698 psi | 64% | 2910 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,463 psi | 59% | 2792 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 53,113 psi | 83% | 3022 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 80% | 52,504 psi | 82% | 3038 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 46,572 psi | 73% | 2933 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,156 psi | 82% | 3035 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 52,649 psi | 83% | 3002 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,354 psi | 73% | 2881 fps | 99.8% |
| Vihtavuori N170 | <<locked>> | 86% | 48,994 psi | 77% | 2953 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 52,518 psi | 82% | 3009 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,837 psi | 81% | 3081 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 80% | 43,453 psi | 68% | 2890 fps | 98.1% |
| Vihtavuori N568 | <<locked>> | 80% | 38,479 psi | 60% | 2812 fps | 95.3% |
| Vihtavuori N570 | 90.2 gr | 86% | 45,745 psi | 72% | 3012 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,630 psi | 75% | 3002 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,892 psi | 77% | 2940 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 | Nosler SP SolBase. ADI AR 2218 delivers the highest muzzle velocity at 3,241 fps; across all powders the maximum-charge window runs from 2,037 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 1:12.0 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 | 150gr | Nosler SP SolBase 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.