Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 161gr | SUS-TAC LRT bullet and 51 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% | 55,027 psi | 86% | 2927 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 50,560 psi | 79% | 2959 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 82% | 54,070 psi | 85% | 3035 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 55,825 psi | 87% | 3012 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,723 psi | 86% | 3035 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 92% | 54,186 psi | 85% | 3022 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 54,534 psi | 85% | 3143 fps | 99% |
| ADI AR 2225 | <<locked>> | 96% | 57,696 psi | 90% | 3100 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 56,014 psi | 88% | 3009 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,448 psi | 87% | 3005 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,317 psi | 87% | 3028 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 57,435 psi | 90% | 2986 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,433 psi | 85% | 3012 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 56,608 psi | 89% | 3117 fps | 99% |
| Alliant Reloder-50 | <<locked>> | 98% | 56,942 psi | 89% | 3114 fps | 98.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,085 psi | 86% | 2995 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 54,752 psi | 86% | 3018 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,215 psi | 85% | 3031 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 55,317 psi | 87% | 3028 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,390 psi | 87% | 3035 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 57,159 psi | 90% | 3022 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,173 psi | 88% | 3005 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 53,896 psi | 84% | 3104 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,971 psi | 60% | 1952 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 57,217 psi | 90% | 2999 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 86% | 57,246 psi | 90% | 3081 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 55,927 psi | 88% | 2949 fps | 96.1% |
| IMR 8133 Enduron | <<locked>> | 98% | 56,579 psi | 89% | 3084 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 57,159 psi | 90% | 2959 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,215 psi | 85% | 3048 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,405 psi | 87% | 3041 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,607 psi | 86% | 3041 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 57,130 psi | 90% | 3025 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,972 psi | 61% | 1995 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 54,621 psi | 86% | 3087 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 53,679 psi | 84% | 3054 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 56,057 psi | 88% | 2982 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 55,492 psi | 87% | 2999 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,417 psi | 82% | 2969 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,129 psi | 86% | 2995 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 57,522 psi | 90% | 2972 fps | 99.9% |
| Somchem S385 | <<locked>> | 82% | 55,680 psi | 87% | 2966 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 55,738 psi | 87% | 2953 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,114 psi | 86% | 2982 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 82% | 55,347 psi | 87% | 2959 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,708 psi | 86% | 3045 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 56,202 psi | 88% | 3048 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 54,259 psi | 85% | 3058 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 92% | 55,724 psi | 87% | 3127 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 54,360 psi | 85% | 3022 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,506 psi | 87% | 2963 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% | 48,109 psi | 75% | 2818 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 43,497 psi | 68% | 2822 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 80% | 50,401 psi | 79% | 2972 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 80% | 52,199 psi | 82% | 2956 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 47,616 psi | 75% | 2910 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 80% | 35,505 psi | 56% | 2644 fps | 97% |
| ADI AR 2218 | 88.8 gr | 88% | 40,654 psi | 64% | 2844 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 32,938 psi | 52% | 2621 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 52,431 psi | 82% | 2953 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,938 psi | 81% | 2946 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,370 psi | 76% | 2910 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,079 psi | 74% | 2828 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,191 psi | 65% | 2785 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 41,945 psi | 66% | 2838 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 90% | 42,250 psi | 66% | 2835 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,252 psi | 71% | 2815 fps | 96.9% |
| Bofors RP15 | <<locked>> | 80% | 44,962 psi | 70% | 2841 fps | 99.6% |
| Bofors RP30 | <<locked>> | 80% | 38,464 psi | 60% | 2723 fps | 98% |
| Bofors RP5 | <<locked>> | 80% | 48,370 psi | 76% | 2910 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 38,740 psi | 61% | 2723 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 80% | 49,966 psi | 78% | 2904 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,110 psi | 77% | 2884 fps | 99.2% |
| Hodgdon Retumbo | 76.2 gr | 80% | 40,408 psi | 63% | 2848 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,514 psi | 45% | 1745 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,343 psi | 79% | 2884 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 80% | 46,427 psi | 73% | 2894 fps | 99.3% |
| IMR 7977 Enduron | <<locked>> | 88% | 52,373 psi | 82% | 2887 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 82% | 32,750 psi | 51% | 2595 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 41,510 psi | 65% | 2694 fps | 100% |
| Norma 217 | <<locked>> | 80% | 30,850 psi | 48% | 2562 fps | 97.2% |
| Norma MRP | <<locked>> | 80% | 51,605 psi | 81% | 2979 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,094 psi | 74% | 2910 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 80% | 42,409 psi | 66% | 2776 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,312 psi | 46% | 1788 fps | 100% |
| ReloadSwiss RS 76 | 81.5 gr | 80% | 39,943 psi | 63% | 2822 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 36,825 psi | 58% | 2710 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 52,707 psi | 83% | 2927 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 51,880 psi | 81% | 2940 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 45,745 psi | 72% | 2844 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,532 psi | 81% | 2936 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 53,838 psi | 84% | 2917 fps | 99.7% |
| Somchem S385 | <<locked>> | 80% | 52,185 psi | 82% | 2910 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,701 psi | 72% | 2785 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 86% | 48,254 psi | 76% | 2861 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 80% | 51,982 psi | 81% | 2910 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,024 psi | 80% | 2982 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 80% | 42,772 psi | 67% | 2799 fps | 98.4% |
| Vihtavuori N568 | <<locked>> | 80% | 37,913 psi | 59% | 2726 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 86% | 44,918 psi | 70% | 2920 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,775 psi | 73% | 2907 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,327 psi | 76% | 2844 fps | 99.9% |
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 51 powders for 7 mm KM Katzmaier loaded with the .284 | 161gr | SUS-TAC LRT. ADI AR 2218 delivers the highest muzzle velocity at 3,143 fps; across all powders the maximum-charge window runs from 1,952 fps to 3,143 fps. Accurate 8700 gives the best case fill at 100 %, and 51 of the 51 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 161.0 gr projectile in 0.284" calls for a 1:8.0 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 | 161gr | SUS-TAC LRT 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.