Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 150gr | Nosler Ballistic Tip Hunting 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, 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% | 54,723 psi | 86% | 3012 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 50,401 psi | 79% | 3031 fps | 97% |
| Accurate MAGPRO | <<locked>> | 84% | 57,667 psi | 90% | 3182 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 55,550 psi | 87% | 3100 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,360 psi | 85% | 3117 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 92% | 53,737 psi | 84% | 3097 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 96% | 54,302 psi | 85% | 3219 fps | 98.6% |
| ADI AR 2225 | <<locked>> | 96% | 57,421 psi | 90% | 3186 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,143 psi | 86% | 3087 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 54,955 psi | 86% | 3114 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,884 psi | 89% | 3071 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 57,740 psi | 90% | 3150 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 56,405 psi | 88% | 3196 fps | 98.6% |
| Alliant Reloder-50 | <<locked>> | 98% | 56,652 psi | 89% | 3189 fps | 98.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 54,737 psi | 86% | 3074 fps | 98.5% |
| Bofors RP15 | <<locked>> | 86% | 54,578 psi | 86% | 3104 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 57,696 psi | 90% | 3173 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 54,955 psi | 86% | 3114 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,129 psi | 86% | 3120 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 56,768 psi | 89% | 3107 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 55,825 psi | 87% | 3091 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 90% | 57,435 psi | 90% | 3248 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,000 psi | 60% | 2028 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 57,000 psi | 89% | 3084 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 86% | 56,724 psi | 89% | 3163 fps | 99.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 56,202 psi | 88% | 3163 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 56,840 psi | 89% | 3045 fps | 100% |
| Norma 217 | <<locked>> | 96% | 53,911 psi | 84% | 3127 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,172 psi | 86% | 3127 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,244 psi | 85% | 3123 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 56,956 psi | 89% | 3110 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,957 psi | 61% | 2077 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 54,288 psi | 85% | 3166 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 57,696 psi | 90% | 3202 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 82% | 55,854 psi | 88% | 3068 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 54,998 psi | 86% | 3081 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,228 psi | 82% | 3041 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 54,636 psi | 86% | 3077 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 57,232 psi | 90% | 3058 fps | 99.8% |
| Somchem S385 | <<locked>> | 82% | 55,332 psi | 87% | 3048 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 55,535 psi | 87% | 3038 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 54,926 psi | 86% | 3061 fps | 97% |
| Vihtavuori N555 | <<locked>> | 82% | 54,897 psi | 86% | 3045 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,520 psi | 85% | 3130 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 88% | 55,869 psi | 88% | 3127 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 90% | 53,998 psi | 85% | 3136 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 92% | 55,477 psi | 87% | 3205 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 53,998 psi | 85% | 3107 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,129 psi | 86% | 3045 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% | 47,906 psi | 75% | 2900 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 46,659 psi | 73% | 2959 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 80% | 50,053 psi | 78% | 3048 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 80% | 51,866 psi | 81% | 3038 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 47,195 psi | 74% | 2986 fps | 99% |
| ADI AR 2217 | <<locked>> | 80% | 35,259 psi | 55% | 2710 fps | 96.2% |
| ADI AR 2218 | 94.6 gr | 90% | 43,410 psi | 68% | 2986 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 32,619 psi | 51% | 2680 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,764 psi | 81% | 3028 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,964 psi | 75% | 2986 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,630 psi | 73% | 2910 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,857 psi | 64% | 2858 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 45,020 psi | 71% | 2979 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 92% | 45,208 psi | 71% | 2969 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,875 psi | 70% | 2884 fps | 96.2% |
| Bofors RP15 | <<locked>> | 80% | 44,672 psi | 70% | 2920 fps | 99.3% |
| Bofors RP30 | <<locked>> | 80% | 38,276 psi | 60% | 2795 fps | 97.3% |
| Bofors RP5 | <<locked>> | 80% | 47,964 psi | 75% | 2986 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 80% | 38,363 psi | 60% | 2792 fps | 98% |
| Hodgdon H4831 | <<locked>> | 80% | 49,545 psi | 78% | 2979 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,718 psi | 76% | 2963 fps | 98.8% |
| Hodgdon Retumbo | 79.4 gr | 80% | 40,001 psi | 63% | 2917 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,485 psi | 45% | 1818 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,053 psi | 78% | 2963 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 80% | 46,035 psi | 72% | 2969 fps | 98.9% |
| IMR 8133 Enduron | <<locked>> | 84% | 34,737 psi | 54% | 2720 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 41,292 psi | 65% | 2772 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 30,574 psi | 48% | 2621 fps | 96.3% |
| Norma MRP | <<locked>> | 80% | 51,343 psi | 80% | 3061 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 46,702 psi | 73% | 2986 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 80% | 42,076 psi | 66% | 2848 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,254 psi | 46% | 1860 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 39,653 psi | 62% | 2890 fps | 99.8% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 36,550 psi | 57% | 2772 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 52,243 psi | 82% | 3005 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 51,561 psi | 81% | 3022 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 45,484 psi | 71% | 2913 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,213 psi | 80% | 3018 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 53,505 psi | 84% | 2995 fps | 99.5% |
| Somchem S385 | <<locked>> | 80% | 51,764 psi | 81% | 2989 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,542 psi | 71% | 2864 fps | 99.7% |
| Vihtavuori N170 | <<locked>> | 86% | 47,993 psi | 75% | 2933 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 80% | 51,488 psi | 81% | 2992 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 50,763 psi | 80% | 3061 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 80% | 42,467 psi | 67% | 2871 fps | 97.8% |
| Vihtavuori N568 | <<locked>> | 82% | 40,422 psi | 63% | 2861 fps | 95.9% |
| Vihtavuori N570 | 88.6 gr | 86% | 44,585 psi | 70% | 2989 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,340 psi | 73% | 2986 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,051 psi | 75% | 2923 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 | Nosler Ballistic Tip Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 3,248 fps; across all powders the maximum-charge window runs from 2,028 fps to 3,248 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, Vihtavuori N570, Hodgdon Retumbo rank at the top here: for 7 mm KM Katzmaier with the .284 | 150gr | Nosler Ballistic Tip Hunting 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.