Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 145gr | SUS-TAC HPT bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, 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>> | 86% | 55,390 psi | 87% | 3064 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 57,319 psi | 90% | 3232 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 84% | 54,476 psi | 85% | 3173 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 84% | 56,449 psi | 88% | 3159 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,027 psi | 86% | 3173 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 94% | 54,056 psi | 85% | 3146 fps | 99.8% |
| ADI AR 2218 | <<locked>> | 98% | 54,708 psi | 86% | 3264 fps | 98.2% |
| ADI AR 2225 | <<locked>> | 98% | 57,392 psi | 90% | 3232 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 56,608 psi | 89% | 3153 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 56,608 psi | 89% | 3153 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,014 psi | 88% | 3146 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 55,550 psi | 87% | 3166 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 57,464 psi | 90% | 3127 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 54,288 psi | 85% | 3150 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,360 psi | 85% | 3156 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 56,550 psi | 89% | 3241 fps | 98.3% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 56,579 psi | 89% | 3232 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,521 psi | 87% | 3127 fps | 98.2% |
| Bofors RP15 | <<locked>> | 88% | 54,969 psi | 86% | 3156 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 54,215 psi | 85% | 3163 fps | 99.8% |
| Bofors RP5 | <<locked>> | 86% | 55,550 psi | 87% | 3166 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 55,651 psi | 87% | 3173 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 53,983 psi | 85% | 3100 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 86% | 56,695 psi | 89% | 3146 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 56,594 psi | 89% | 3058 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 57,537 psi | 90% | 3301 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,710 psi | 59% | 2047 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,447 psi | 85% | 3081 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 88% | 57,406 psi | 90% | 3219 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,217 psi | 88% | 3209 fps | 99.9% |
| Lovex S071 | <<locked>> | 92% | 57,363 psi | 90% | 3094 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3232 fps | 100% |
| Norma MRP | <<locked>> | 84% | 55,695 psi | 87% | 3182 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 54,766 psi | 86% | 3176 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 90% | 57,595 psi | 90% | 3163 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,812 psi | 61% | 2096 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,230 psi | 85% | 3219 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 53,766 psi | 84% | 3179 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 84% | 56,884 psi | 89% | 3127 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 55,825 psi | 87% | 3140 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,448 psi | 87% | 3133 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 54,534 psi | 85% | 3051 fps | 99.3% |
| Somchem S385 | <<locked>> | 84% | 56,202 psi | 88% | 3107 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,347 psi | 88% | 3091 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 55,564 psi | 87% | 3107 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 84% | 55,506 psi | 87% | 3104 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,042 psi | 86% | 3182 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 90% | 56,304 psi | 88% | 3179 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 92% | 54,172 psi | 85% | 3182 fps | 98.9% |
| Vihtavuori N570 | <<locked>> | 94% | 55,463 psi | 87% | 3248 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,041 psi | 85% | 3163 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,014 psi | 88% | 3100 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% | 45,324 psi | 71% | 2894 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 49,806 psi | 78% | 3097 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 80% | 47,166 psi | 74% | 3031 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 80% | 49,356 psi | 77% | 3035 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 44,541 psi | 70% | 2972 fps | 98.2% |
| ADI AR 2217 | <<locked>> | 82% | 35,534 psi | 56% | 2756 fps | 95.8% |
| ADI AR 2218 | <<locked>> | 94% | 47,137 psi | 74% | 3107 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 80% | 30,574 psi | 48% | 2654 fps | 96.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 49,661 psi | 78% | 3035 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 49,661 psi | 78% | 3035 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,197 psi | 77% | 3025 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,310 psi | 71% | 2976 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,048 psi | 69% | 2907 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,334 psi | 60% | 2848 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,328 psi | 79% | 3091 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 45,092 psi | 71% | 3022 fps | 95.4% |
| Alliant Reloder-50 | <<locked>> | 96% | 48,559 psi | 76% | 3084 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 42,844 psi | 67% | 2877 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 42,119 psi | 66% | 2907 fps | 98.5% |
| Bofors RP30 | <<locked>> | 80% | 35,795 psi | 56% | 2776 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 45,310 psi | 71% | 2976 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 80% | 36,085 psi | 57% | 2772 fps | 96.7% |
| Hodgdon H4831 | <<locked>> | 80% | 47,065 psi | 74% | 2969 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,238 psi | 72% | 2953 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,142 psi | 83% | 3009 fps | 100% |
| Hodgdon Retumbo | 77.2 gr | 80% | 37,405 psi | 59% | 2894 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,398 psi | 45% | 1837 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,906 psi | 75% | 2959 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 80% | 43,308 psi | 68% | 2953 fps | 97.9% |
| IMR 8133 Enduron | <<locked>> | 86% | 34,621 psi | 54% | 2759 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 38,972 psi | 61% | 2762 fps | 99.5% |
| Norma 217 | <<locked>> | 82% | 30,400 psi | 48% | 2657 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 48,298 psi | 76% | 3054 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 43,569 psi | 68% | 2966 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 80% | 39,334 psi | 62% | 2831 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,167 psi | 46% | 1880 fps | 100% |
| ReloadSwiss RS 76 | 82.6 gr | 80% | 36,840 psi | 58% | 2864 fps | 99% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 39,581 psi | 62% | 2887 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 49,937 psi | 78% | 3005 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 80% | 48,849 psi | 77% | 3015 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,501 psi | 76% | 3012 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 51,082 psi | 80% | 2989 fps | 98.9% |
| Somchem S385 | <<locked>> | 80% | 49,197 psi | 77% | 2986 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 43,120 psi | 68% | 2854 fps | 99.2% |
| Vihtavuori N170 | <<locked>> | 90% | 51,866 psi | 81% | 3045 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 48,805 psi | 76% | 2995 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,848 psi | 75% | 3051 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 80% | 39,972 psi | 63% | 2854 fps | 96.7% |
| Vihtavuori N568 | <<locked>> | 84% | 40,640 psi | 64% | 2907 fps | 95.5% |
| Vihtavuori N570 | 90.1 gr | 90% | 47,950 psi | 75% | 3107 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 42,989 psi | 67% | 2976 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,440 psi | 71% | 2913 fps | 99.2% |
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 52 powders for 7 mm KM Katzmaier loaded with the .284 | 145gr | SUS-TAC HPT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,301 fps; across all powders the maximum-charge window runs from 2,047 fps to 3,301 fps. Alliant Reloder-50 gives the best case fill at 100 %, and 52 of the 52 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 145.0 gr projectile in 0.284" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-50, Hodgdon TrailBoss, IMR 8133 Enduron 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 7 mm KM Katzmaier with the .284 | 145gr | SUS-TAC HPT 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.