Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 150gr | Berger Classic Hybrid Hunter bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, 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>> | 84% | 55,056 psi | 86% | 3018 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 50,966 psi | 80% | 3045 fps | 97.2% |
| Accurate MAGPRO | <<locked>> | 82% | 54,259 psi | 85% | 3127 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 82% | 55,869 psi | 88% | 3107 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,665 psi | 86% | 3120 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 92% | 54,244 psi | 85% | 3107 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 54,897 psi | 86% | 3232 fps | 98.7% |
| ADI AR 2225 | <<locked>> | 94% | 53,969 psi | 85% | 3133 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,622 psi | 87% | 3097 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,288 psi | 87% | 3117 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 57,450 psi | 90% | 3077 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,375 psi | 85% | 3100 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 57,014 psi | 89% | 3209 fps | 98.7% |
| Alliant Reloder-50 | <<locked>> | 98% | 57,319 psi | 90% | 3202 fps | 98.4% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,143 psi | 86% | 3084 fps | 98.6% |
| Bofors RP15 | <<locked>> | 86% | 54,868 psi | 86% | 3110 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,389 psi | 85% | 3120 fps | 99.9% |
| Bofors RP5 | <<locked>> | 84% | 55,288 psi | 87% | 3117 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,651 psi | 87% | 3127 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 57,261 psi | 90% | 3114 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,115 psi | 88% | 3097 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 88% | 53,940 psi | 85% | 3192 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,000 psi | 60% | 2031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 57,290 psi | 90% | 3091 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 86% | 57,261 psi | 90% | 3173 fps | 100% |
| IMR 8133 Enduron | <<locked>> | 98% | 56,681 psi | 89% | 3173 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 57,130 psi | 90% | 3048 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,418 psi | 85% | 3136 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,506 psi | 87% | 3133 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,592 psi | 86% | 3127 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 57,464 psi | 90% | 3120 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,943 psi | 61% | 2077 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 54,810 psi | 86% | 3176 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 54,012 psi | 85% | 3143 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 82% | 56,159 psi | 88% | 3074 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 55,347 psi | 87% | 3087 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,765 psi | 83% | 3054 fps | 97.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 54,984 psi | 86% | 3084 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 57,667 psi | 90% | 3064 fps | 99.8% |
| Somchem S385 | <<locked>> | 82% | 55,608 psi | 87% | 3054 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 55,796 psi | 87% | 3041 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,332 psi | 87% | 3071 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 55,463 psi | 87% | 3054 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,824 psi | 86% | 3136 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 88% | 56,318 psi | 88% | 3136 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 54,476 psi | 85% | 3146 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 92% | 55,985 psi | 88% | 3215 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 54,578 psi | 86% | 3114 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,434 psi | 87% | 3051 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% | 48,225 psi | 76% | 2907 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 43,801 psi | 69% | 2900 fps | 95% |
| Accurate MAGPRO | <<locked>> | 80% | 50,517 psi | 79% | 3058 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 80% | 52,199 psi | 82% | 3045 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 47,529 psi | 74% | 2992 fps | 99.1% |
| ADI AR 2217 | <<locked>> | 80% | 35,520 psi | 56% | 2720 fps | 96.4% |
| ADI AR 2218 | 95.2 gr | 90% | 43,801 psi | 69% | 2992 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 32,866 psi | 52% | 2687 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,083 psi | 82% | 3038 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,283 psi | 76% | 2992 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,978 psi | 74% | 2917 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,176 psi | 65% | 2864 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 45,440 psi | 71% | 2986 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 92% | 45,643 psi | 72% | 2979 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,223 psi | 71% | 2894 fps | 96.4% |
| Bofors RP15 | <<locked>> | 80% | 44,991 psi | 71% | 2927 fps | 99.3% |
| Bofors RP30 | <<locked>> | 80% | 38,566 psi | 60% | 2802 fps | 97.5% |
| Bofors RP5 | <<locked>> | 80% | 48,283 psi | 76% | 2992 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 38,638 psi | 61% | 2799 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 80% | 49,835 psi | 78% | 2986 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,008 psi | 77% | 2969 fps | 98.9% |
| Hodgdon Retumbo | 79.9 gr | 80% | 40,335 psi | 63% | 2927 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,543 psi | 45% | 1821 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,343 psi | 79% | 2969 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 80% | 46,369 psi | 73% | 2976 fps | 99% |
| IMR 8133 Enduron | <<locked>> | 84% | 35,041 psi | 55% | 2726 fps | 96% |
| Lovex S071 | <<locked>> | 80% | 41,481 psi | 65% | 2776 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 30,879 psi | 48% | 2628 fps | 96.4% |
| Norma MRP | <<locked>> | 80% | 51,648 psi | 81% | 3068 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,021 psi | 74% | 2992 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 80% | 42,525 psi | 67% | 2861 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,312 psi | 46% | 1864 fps | 100% |
| ReloadSwiss RS 76 | 85.5 gr | 80% | 39,987 psi | 63% | 2897 fps | 99.8% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 36,840 psi | 58% | 2779 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 52,547 psi | 82% | 3012 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 80% | 51,895 psi | 81% | 3028 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 45,861 psi | 72% | 2923 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,547 psi | 81% | 3025 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 53,780 psi | 84% | 3002 fps | 99.5% |
| Somchem S385 | <<locked>> | 80% | 52,098 psi | 82% | 2995 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,818 psi | 72% | 2871 fps | 99.7% |
| Vihtavuori N170 | <<locked>> | 86% | 48,240 psi | 76% | 2940 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 51,851 psi | 81% | 2999 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,053 psi | 80% | 3071 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 80% | 42,757 psi | 67% | 2877 fps | 98% |
| Vihtavuori N568 | <<locked>> | 80% | 37,927 psi | 59% | 2799 fps | 95% |
| Vihtavuori N570 | <<locked>> | 86% | 44,889 psi | 70% | 2995 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,891 psi | 73% | 2992 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,327 psi | 76% | 2930 fps | 99.7% |
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 49 powders for 7 mm KM Katzmaier loaded with the .284 | 150gr | Berger Classic Hybrid Hunter. ADI AR 2218 delivers the highest muzzle velocity at 3,232 fps; across all powders the maximum-charge window runs from 2,031 fps to 3,232 fps. Accurate 8700 gives the best case fill at 100 %, and 49 of the 49 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 1:11.0 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, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 7 mm KM Katzmaier with the .284 | 150gr | Berger Classic Hybrid Hunter 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.