Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 149gr | TWENTY-NINE SOLID bullet and 53 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 Alliant Reloder-33.
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>> | 86% | 57,159 psi | 90% | 3058 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 48,733 psi | 76% | 3009 fps | 96.4% |
| Accurate High Country | <<locked>> | 82% | 55,332 psi | 87% | 3163 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 84% | 56,318 psi | 88% | 3169 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 82% | 54,346 psi | 85% | 3091 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 56,840 psi | 89% | 3166 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 94% | 56,173 psi | 88% | 3146 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 56,768 psi | 89% | 3271 fps | 98.9% |
| ADI AR 2225 | <<locked>> | 96% | 55,579 psi | 87% | 3166 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 54,505 psi | 85% | 3084 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 54,505 psi | 85% | 3084 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 57,740 psi | 90% | 3140 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 57,392 psi | 90% | 3159 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 55,622 psi | 87% | 3064 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 56,260 psi | 88% | 3140 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 56,362 psi | 88% | 3150 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 54,708 psi | 86% | 3179 fps | 98.2% |
| Alliant Reloder-50 | <<locked>> | 98% | 54,824 psi | 86% | 3166 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 57,203 psi | 90% | 3123 fps | 98.7% |
| Bofors RP15 | <<locked>> | 88% | 56,782 psi | 89% | 3150 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 56,101 psi | 88% | 3159 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 57,392 psi | 90% | 3159 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 57,638 psi | 90% | 3166 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 55,666 psi | 87% | 3094 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 54,520 psi | 85% | 3077 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 90% | 55,753 psi | 87% | 3235 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,913 psi | 59% | 2028 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,767 psi | 87% | 3071 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 86% | 55,448 psi | 87% | 3150 fps | 99.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 54,636 psi | 86% | 3146 fps | 99.9% |
| Lovex S071 | <<locked>> | 90% | 55,434 psi | 87% | 3031 fps | 100% |
| Norma 217 | <<locked>> | 98% | 55,999 psi | 88% | 3173 fps | 100% |
| Norma MRP | <<locked>> | 84% | 57,609 psi | 90% | 3176 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 56,811 psi | 89% | 3173 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 55,376 psi | 87% | 3097 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,870 psi | 61% | 2073 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 56,608 psi | 89% | 3215 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 55,970 psi | 88% | 3186 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 82% | 54,708 psi | 86% | 3058 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 57,435 psi | 90% | 3130 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 50,749 psi | 80% | 3025 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 57,058 psi | 89% | 3123 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,072 psi | 88% | 3045 fps | 99.6% |
| Somchem S385 | <<locked>> | 84% | 57,696 psi | 90% | 3094 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 54,230 psi | 85% | 3025 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 57,363 psi | 90% | 3110 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 84% | 57,377 psi | 90% | 3094 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 56,898 psi | 89% | 3182 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 54,534 psi | 85% | 3114 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 92% | 56,304 psi | 88% | 3186 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 94% | 57,711 psi | 90% | 3255 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 56,376 psi | 88% | 3156 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 57,682 psi | 90% | 3094 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% | 46,760 psi | 73% | 2887 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 45,252 psi | 71% | 2940 fps | 95.3% |
| Accurate High Country | <<locked>> | 80% | 51,590 psi | 81% | 3097 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 80% | 48,863 psi | 77% | 3035 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 80% | 50,836 psi | 80% | 3028 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 80% | 46,006 psi | 72% | 2969 fps | 98.7% |
| ADI AR 2217 | <<locked>> | 80% | 34,316 psi | 54% | 2694 fps | 95.7% |
| ADI AR 2218 | 95 gr | 92% | 45,368 psi | 71% | 3038 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 31,691 psi | 50% | 2664 fps | 97.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 51,097 psi | 80% | 3025 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 51,097 psi | 80% | 3025 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,618 psi | 79% | 3018 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,789 psi | 73% | 2972 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,571 psi | 71% | 2900 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,798 psi | 62% | 2844 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,301 psi | 82% | 3087 fps | 100% |
| Alliant Reloder-33 | 92.6 gr | 88% | 43,627 psi | 68% | 2959 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 94% | 47,108 psi | 74% | 3022 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,947 psi | 69% | 2874 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 43,526 psi | 68% | 2904 fps | 99% |
| Bofors RP30 | <<locked>> | 80% | 37,159 psi | 58% | 2776 fps | 96.8% |
| Bofors RP5 | <<locked>> | 80% | 46,789 psi | 73% | 2972 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 80% | 37,333 psi | 59% | 2776 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 80% | 48,443 psi | 76% | 2966 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,601 psi | 75% | 2949 fps | 98.5% |
| Hodgdon Retumbo | <<locked>> | 80% | 38,812 psi | 61% | 2897 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,384 psi | 44% | 1814 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,168 psi | 77% | 2953 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 80% | 44,817 psi | 70% | 2953 fps | 98.5% |
| IMR 8133 Enduron | <<locked>> | 84% | 33,692 psi | 53% | 2703 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 40,306 psi | 63% | 2759 fps | 99.8% |
| Norma 217 | <<locked>> | 80% | 29,530 psi | 46% | 2598 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 50,111 psi | 79% | 3051 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 45,397 psi | 71% | 2972 fps | 99% |
| Ramshot Magnum | <<locked>> | 80% | 40,973 psi | 64% | 2838 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,153 psi | 46% | 1860 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,406 psi | 60% | 2871 fps | 99.5% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 38,189 psi | 60% | 2825 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 51,300 psi | 80% | 2995 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 80% | 50,343 psi | 79% | 3012 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 47,297 psi | 74% | 2959 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,995 psi | 78% | 3005 fps | 99.8% |
| Somchem S361 | <<locked>> | 80% | 52,373 psi | 82% | 2982 fps | 99.3% |
| Somchem S385 | <<locked>> | 80% | 50,662 psi | 79% | 2979 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 44,440 psi | 70% | 2851 fps | 99.5% |
| Vihtavuori N170 | <<locked>> | 88% | 49,995 psi | 78% | 2979 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 50,401 psi | 79% | 2986 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,574 psi | 78% | 3048 fps | 99% |
| Vihtavuori N565 | <<locked>> | 80% | 41,379 psi | 65% | 2858 fps | 97.4% |
| Vihtavuori N568 | <<locked>> | 82% | 39,204 psi | 61% | 2844 fps | 95.4% |
| Vihtavuori N570 | 89 gr | 88% | 46,369 psi | 73% | 3038 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 44,875 psi | 70% | 2972 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,978 psi | 74% | 2910 fps | 99.5% |
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 53 powders for 7 mm KM Katzmaier loaded with the .284 | 149gr | TWENTY-NINE SOLID. ADI AR 2218 delivers the highest muzzle velocity at 3,271 fps; across all powders the maximum-charge window runs from 2,028 fps to 3,271 fps. Accurate 8700 gives the best case fill at 100 %, and 53 of the 53 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 149.0 gr projectile in 0.284" calls for a 1:9.0 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, Alliant Reloder-33 rank at the top here: for 7 mm KM Katzmaier with the .284 | 149gr | TWENTY-NINE SOLID 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.