Load Specifications
Load data in caliber 7 mm KM Katzmaier with .283 | 150gr | Rhino Penetrator bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and Hodgdon Retumbo.
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% | 53,940 psi | 85% | 2999 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 49,298 psi | 77% | 3012 fps | 96.6% |
| Accurate MAGPRO | <<locked>> | 84% | 56,942 psi | 89% | 3173 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 54,723 psi | 86% | 3087 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 57,479 psi | 90% | 3169 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 94% | 56,840 psi | 89% | 3146 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 57,609 psi | 90% | 3281 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 96% | 56,260 psi | 88% | 3166 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 55,085 psi | 86% | 3084 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 55,085 psi | 86% | 3084 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 54,549 psi | 85% | 3077 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 54,172 psi | 85% | 3097 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,057 psi | 88% | 3058 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 56,913 psi | 89% | 3140 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 57,058 psi | 89% | 3150 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 55,376 psi | 87% | 3179 fps | 98.4% |
| Alliant Reloder-50 | <<locked>> | 98% | 55,448 psi | 87% | 3169 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 57,725 psi | 90% | 3123 fps | 98.9% |
| Bofors RP15 | <<locked>> | 88% | 57,392 psi | 90% | 3150 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 56,753 psi | 89% | 3159 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 54,172 psi | 85% | 3097 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 54,172 psi | 85% | 3104 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 56,043 psi | 88% | 3091 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 55,100 psi | 86% | 3077 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 90% | 56,304 psi | 88% | 3235 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,869 psi | 59% | 2021 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,304 psi | 88% | 3071 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 86% | 55,927 psi | 88% | 3146 fps | 99.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 55,274 psi | 87% | 3150 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 56,014 psi | 88% | 3031 fps | 100% |
| Norma 217 | <<locked>> | 98% | 56,681 psi | 89% | 3173 fps | 100% |
| Norma MRP | <<locked>> | 82% | 54,172 psi | 85% | 3114 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 57,493 psi | 90% | 3176 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 56,028 psi | 88% | 3097 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,986 psi | 61% | 2070 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 57,348 psi | 90% | 3215 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 56,608 psi | 89% | 3186 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 55,085 psi | 86% | 3054 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 82% | 54,389 psi | 85% | 3071 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 51,329 psi | 80% | 3025 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 57,667 psi | 90% | 3123 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,594 psi | 89% | 3045 fps | 99.7% |
| Somchem S385 | <<locked>> | 82% | 54,563 psi | 86% | 3035 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 54,795 psi | 86% | 3025 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 54,186 psi | 85% | 3048 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 54,230 psi | 85% | 3035 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 57,537 psi | 90% | 3179 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 54,955 psi | 86% | 3110 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 92% | 56,956 psi | 89% | 3189 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 92% | 54,404 psi | 85% | 3189 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 86% | 57,087 psi | 89% | 3156 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 54,404 psi | 85% | 3031 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% | 47,137 psi | 74% | 2884 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 45,818 psi | 72% | 2943 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 80% | 49,284 psi | 77% | 3035 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 80% | 51,256 psi | 80% | 3025 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 46,586 psi | 73% | 2972 fps | 98.9% |
| ADI AR 2217 | <<locked>> | 80% | 34,737 psi | 54% | 2697 fps | 95.9% |
| ADI AR 2218 | 93.4 gr | 90% | 42,714 psi | 67% | 2969 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 32,024 psi | 50% | 2664 fps | 97.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 51,474 psi | 81% | 3022 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 51,474 psi | 81% | 3022 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,010 psi | 80% | 3015 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,355 psi | 74% | 2976 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,992 psi | 72% | 2897 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,219 psi | 63% | 2844 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,953 psi | 83% | 3087 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 44,193 psi | 69% | 2959 fps | 95.6% |
| Alliant Reloder-50 | <<locked>> | 92% | 44,251 psi | 69% | 2949 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,251 psi | 69% | 2871 fps | 96% |
| Bofors RP15 | <<locked>> | 80% | 44,063 psi | 69% | 2907 fps | 99.1% |
| Bofors RP30 | <<locked>> | 80% | 37,550 psi | 59% | 2779 fps | 97.1% |
| Bofors RP5 | <<locked>> | 80% | 47,355 psi | 74% | 2976 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 80% | 37,855 psi | 59% | 2779 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 80% | 48,994 psi | 77% | 2969 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,124 psi | 75% | 2949 fps | 98.7% |
| Hodgdon Retumbo | 78.3 gr | 80% | 39,218 psi | 61% | 2900 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,529 psi | 45% | 1814 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,516 psi | 78% | 2949 fps | 99% |
| IMR 7828 SSC | <<locked>> | 80% | 45,382 psi | 71% | 2956 fps | 98.7% |
| IMR 8133 Enduron | <<locked>> | 84% | 34,055 psi | 53% | 2703 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 40,669 psi | 64% | 2759 fps | 99.8% |
| Norma 217 | <<locked>> | 80% | 29,892 psi | 47% | 2602 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 50,517 psi | 79% | 3051 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 45,847 psi | 72% | 2972 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 80% | 41,350 psi | 65% | 2835 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,298 psi | 46% | 1857 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,827 psi | 61% | 2871 fps | 99.6% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 38,580 psi | 60% | 2825 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 51,663 psi | 81% | 2995 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 80% | 50,763 psi | 80% | 3009 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 47,848 psi | 75% | 2963 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,415 psi | 79% | 3005 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 52,881 psi | 83% | 2982 fps | 99.4% |
| Somchem S385 | <<locked>> | 80% | 51,198 psi | 80% | 2979 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 44,817 psi | 70% | 2851 fps | 99.6% |
| Vihtavuori N170 | <<locked>> | 88% | 50,488 psi | 79% | 2982 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 80% | 50,807 psi | 80% | 2982 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,980 psi | 78% | 3048 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 80% | 41,742 psi | 65% | 2854 fps | 97.6% |
| Vihtavuori N568 | <<locked>> | 82% | 39,711 psi | 62% | 2848 fps | 95.6% |
| Vihtavuori N570 | 89.4 gr | 88% | 46,978 psi | 74% | 3041 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 45,527 psi | 71% | 2972 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,355 psi | 74% | 2910 fps | 99.6% |
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 52 powders for 7 mm KM Katzmaier loaded with the .283 | 150gr | Rhino Penetrator. ADI AR 2218 delivers the highest muzzle velocity at 3,281 fps; across all powders the maximum-charge window runs from 2,021 fps to 3,281 fps. Accurate 8700 gives the best case fill at 100 %, and 52 of the 52 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 150.0 gr projectile in 0.283" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 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. ADI AR 2218, Vihtavuori N570, Hodgdon Retumbo rank at the top here: for 7 mm KM Katzmaier with the .283 | 150gr | Rhino Penetrator they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.