Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 152gr | Barnes LRX BT bullet and 53 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 86% | 56,115 psi | 88% | 3018 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 47,659 psi | 75% | 2972 fps | 96.3% |
| Accurate MAGPRO | <<locked>> | 84% | 55,317 psi | 87% | 3130 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 84% | 57,392 psi | 90% | 3117 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 56,202 psi | 88% | 3133 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 94% | 55,376 psi | 87% | 3114 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 56,014 psi | 88% | 3238 fps | 98.9% |
| ADI AR 2225 | <<locked>> | 96% | 54,694 psi | 86% | 3133 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 57,479 psi | 90% | 3110 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,869 psi | 89% | 3100 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,608 psi | 89% | 3127 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,795 psi | 86% | 3025 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 55,303 psi | 87% | 3100 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 55,245 psi | 87% | 3110 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 53,780 psi | 84% | 3140 fps | 98.2% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 57,696 psi | 90% | 3196 fps | 98.4% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,608 psi | 89% | 3091 fps | 98.7% |
| Bofors RP15 | <<locked>> | 88% | 56,014 psi | 88% | 3117 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 55,056 psi | 86% | 3120 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 56,608 psi | 89% | 3127 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,797 psi | 89% | 3133 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 54,824 psi | 86% | 3061 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 53,853 psi | 84% | 3041 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,406 psi | 90% | 3009 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,868 psi | 86% | 3199 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,826 psi | 59% | 2008 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,187 psi | 86% | 3041 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 86% | 54,592 psi | 86% | 3114 fps | 99.8% |
| IMR 7977 Enduron | <<locked>> | 92% | 57,537 psi | 90% | 3045 fps | 95.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 57,450 psi | 90% | 3173 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 54,331 psi | 85% | 2992 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,897 psi | 86% | 3133 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,826 psi | 89% | 3140 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,869 psi | 88% | 3136 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 54,389 psi | 85% | 3058 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,754 psi | 61% | 2054 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 55,680 psi | 87% | 3176 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 54,897 psi | 86% | 3146 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 84% | 57,711 psi | 90% | 3084 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 84% | 56,666 psi | 89% | 3094 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 49,632 psi | 78% | 2982 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,289 psi | 88% | 3091 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,419 psi | 87% | 3015 fps | 99.6% |
| Somchem S385 | <<locked>> | 84% | 56,884 psi | 89% | 3058 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 57,145 psi | 90% | 3048 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 56,420 psi | 88% | 3074 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 84% | 56,376 psi | 88% | 3054 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 56,173 psi | 88% | 3146 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 90% | 57,276 psi | 90% | 3140 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 92% | 55,317 psi | 87% | 3146 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 94% | 56,768 psi | 89% | 3215 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 55,347 psi | 87% | 3117 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 57,000 psi | 89% | 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% | 45,600 psi | 71% | 2848 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 44,150 psi | 69% | 2900 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 80% | 47,834 psi | 75% | 2992 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 80% | 50,125 psi | 79% | 2992 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 80% | 45,281 psi | 71% | 2933 fps | 98.7% |
| ADI AR 2217 | <<locked>> | 80% | 33,460 psi | 52% | 2654 fps | 95.4% |
| ADI AR 2218 | 94.4 gr | 92% | 44,498 psi | 70% | 2999 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 80% | 30,792 psi | 48% | 2618 fps | 97.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 50,372 psi | 79% | 2992 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,893 psi | 78% | 2982 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,919 psi | 72% | 2936 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,657 psi | 70% | 2864 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,914 psi | 61% | 2805 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 51,314 psi | 80% | 3048 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 42,583 psi | 67% | 2913 fps | 95.1% |
| Alliant Reloder-50 | <<locked>> | 94% | 45,847 psi | 72% | 2976 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,395 psi | 68% | 2841 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 42,641 psi | 67% | 2867 fps | 98.9% |
| Bofors RP30 | <<locked>> | 80% | 36,143 psi | 57% | 2733 fps | 96.6% |
| Bofors RP5 | <<locked>> | 80% | 45,919 psi | 72% | 2936 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 80% | 36,521 psi | 57% | 2736 fps | 97.4% |
| Hodgdon H4831 | <<locked>> | 80% | 47,718 psi | 75% | 2933 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,862 psi | 73% | 2913 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,896 psi | 84% | 2963 fps | 100% |
| Hodgdon Retumbo | 77.5 gr | 80% | 37,956 psi | 59% | 2854 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,369 psi | 44% | 1798 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,501 psi | 76% | 2920 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 80% | 44,034 psi | 69% | 2917 fps | 98.5% |
| IMR 7977 Enduron | <<locked>> | 90% | 53,911 psi | 84% | 2982 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 86% | 35,143 psi | 55% | 2723 fps | 96.1% |
| Lovex S071 | <<locked>> | 80% | 39,131 psi | 61% | 2717 fps | 99.7% |
| Norma 217 | <<locked>> | 80% | 28,427 psi | 45% | 2546 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 49,037 psi | 77% | 3009 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 44,541 psi | 70% | 2933 fps | 98.9% |
| Ramshot Magnum | <<locked>> | 80% | 40,016 psi | 63% | 2795 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,109 psi | 46% | 1841 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 37,347 psi | 59% | 2825 fps | 99.4% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 37,057 psi | 58% | 2776 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 50,604 psi | 79% | 2963 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 80% | 49,516 psi | 78% | 2972 fps | 99.8% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 46,311 psi | 73% | 2920 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,182 psi | 77% | 2969 fps | 99.8% |
| Somchem S361 | <<locked>> | 80% | 51,692 psi | 81% | 2953 fps | 99.3% |
| Somchem S385 | <<locked>> | 80% | 49,748 psi | 78% | 2943 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 43,613 psi | 68% | 2815 fps | 99.5% |
| Vihtavuori N170 | <<locked>> | 88% | 49,168 psi | 77% | 2943 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 49,327 psi | 77% | 2943 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,588 psi | 76% | 3009 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 80% | 40,350 psi | 63% | 2812 fps | 97.3% |
| Vihtavuori N568 | <<locked>> | 82% | 38,232 psi | 60% | 2799 fps | 95.1% |
| Vihtavuori N570 | 88.5 gr | 88% | 45,498 psi | 71% | 2999 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,816 psi | 69% | 2930 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,992 psi | 72% | 2874 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 | 152gr | Barnes LRX BT. ADI AR 2218 delivers the highest muzzle velocity at 3,238 fps; across all powders the maximum-charge window runs from 2,008 fps to 3,238 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 152.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Alliant Reloder-50, Hodgdon TrailBoss 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 | 152gr | Barnes LRX BT 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.