Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 120gr | Nosler Ballistic Tip Hunting bullet and 56 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Ramshot Grand.
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>> | 88% | 54,752 psi | 86% | 3287 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 57,725 psi | 90% | 3455 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 86% | 56,072 psi | 88% | 3389 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 88% | 54,404 psi | 85% | 3389 fps | 98.8% |
| ADI AR 2217 | <<locked>> | 98% | 57,087 psi | 89% | 3422 fps | 99.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 55,985 psi | 88% | 3445 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,811 psi | 87% | 3386 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,535 psi | 87% | 3373 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 88% | 54,897 psi | 86% | 3386 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 56,652 psi | 89% | 3360 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 57,043 psi | 89% | 3428 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 57,566 psi | 90% | 3448 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 55,680 psi | 87% | 3442 fps | 96.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 55,463 psi | 87% | 3343 fps | 96.8% |
| Bofors RP15 | <<locked>> | 90% | 54,317 psi | 85% | 3376 fps | 99.4% |
| Bofors RP30 | <<locked>> | 96% | 56,927 psi | 89% | 3435 fps | 99.5% |
| Bofors RP5 | <<locked>> | 88% | 54,897 psi | 86% | 3386 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 94% | 54,650 psi | 86% | 3379 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 88% | 57,537 psi | 90% | 3386 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 56,405 psi | 88% | 3366 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,217 psi | 88% | 3297 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 55,970 psi | 88% | 3517 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,463 psi | 59% | 2238 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 54,534 psi | 85% | 3304 fps | 99.8% |
| IMR 4831 | <<locked>> | 82% | 55,274 psi | 87% | 3310 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 54,288 psi | 85% | 3301 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 90% | 56,521 psi | 89% | 3438 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,068 psi | 80% | 3337 fps | 98.6% |
| Lovex S070 | <<locked>> | 82% | 56,811 psi | 89% | 3340 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 56,463 psi | 88% | 3314 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,898 psi | 88% | 3363 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 52,112 psi | 82% | 3369 fps | 99.9% |
| Norma MRP | <<locked>> | 86% | 54,998 psi | 86% | 3406 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,724 psi | 89% | 3360 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 53,693 psi | 84% | 3389 fps | 99% |
| Ramshot Hunter | <<locked>> | 82% | 55,898 psi | 88% | 3363 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 56,739 psi | 89% | 3379 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,435 psi | 60% | 2290 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 57,406 psi | 90% | 3504 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 56,942 psi | 89% | 3451 fps | 98.6% |
| Rottweil R 904 | <<locked>> | 86% | 56,579 psi | 89% | 3353 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 86% | 55,361 psi | 87% | 3366 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 82% | 56,811 psi | 89% | 3340 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,421 psi | 90% | 3291 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 54,969 psi | 86% | 3360 fps | 99.5% |
| Somchem S361 | <<locked>> | 84% | 54,534 psi | 85% | 3271 fps | 98.3% |
| Somchem S365 | <<locked>> | 82% | 54,331 psi | 85% | 3301 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,811 psi | 87% | 3330 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 90% | 55,651 psi | 87% | 3310 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 82% | 57,682 psi | 90% | 3353 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 54,665 psi | 86% | 3330 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 54,447 psi | 85% | 3402 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 92% | 55,521 psi | 87% | 3386 fps | 98.8% |
| Vihtavuori N568 | <<locked>> | 96% | 57,145 psi | 90% | 3458 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 90% | 56,623 psi | 89% | 3448 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,767 psi | 87% | 3323 fps | 99.6% |
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% | 41,611 psi | 65% | 3035 fps | 99% |
| Accurate MAGPRO | <<locked>> | 82% | 46,470 psi | 73% | 3232 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 45,455 psi | 71% | 3179 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 80% | 40,930 psi | 64% | 3100 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 88% | 40,176 psi | 63% | 3071 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 84% | 31,995 psi | 50% | 2877 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,286 psi | 82% | 3327 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,527 psi | 71% | 3173 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,626 psi | 65% | 3110 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,176 psi | 63% | 3058 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,693 psi | 54% | 2959 fps | 98% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,672 psi | 72% | 3235 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 51,416 psi | 81% | 3360 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 51,793 psi | 81% | 3271 fps | 95.9% |
| Bofors RP15 | <<locked>> | 80% | 38,609 psi | 61% | 3031 fps | 95.8% |
| Bofors RP30 | <<locked>> | 86% | 40,016 psi | 63% | 3081 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 41,626 psi | 65% | 3110 fps | 97% |
| Hodgdon H1000 | <<locked>> | 84% | 38,072 psi | 60% | 3018 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 80% | 43,511 psi | 68% | 3107 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,772 psi | 67% | 3087 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,226 psi | 77% | 3186 fps | 100% |
| Hodgdon Retumbo | 82.9 gr | 82% | 36,347 psi | 57% | 3058 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,050 psi | 44% | 2011 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,111 psi | 80% | 3238 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 51,735 psi | 81% | 3251 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,541 psi | 70% | 3104 fps | 96.2% |
| IMR 7828 SSC | <<locked>> | 82% | 42,569 psi | 67% | 3150 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 94% | 41,350 psi | 65% | 3127 fps | 96% |
| Lovex S070 | <<locked>> | 80% | 53,243 psi | 83% | 3281 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 35,679 psi | 56% | 2887 fps | 97.5% |
| Norma 204 | <<locked>> | 80% | 52,112 psi | 82% | 3294 fps | 99% |
| Norma 217 | <<locked>> | 88% | 33,721 psi | 53% | 2943 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 44,193 psi | 69% | 3192 fps | 98.8% |
| Norma URP | <<locked>> | 80% | 53,084 psi | 83% | 3297 fps | 100% |
| Ramshot Grand | 83.3 gr | 80% | 39,523 psi | 62% | 3084 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 52,185 psi | 82% | 3297 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,520 psi | 56% | 2940 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,703 psi | 45% | 2057 fps | 100% |
| ReloadSwiss RS 76 | 86.6 gr | 80% | 33,344 psi | 52% | 2949 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 44,904 psi | 70% | 3212 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 46,340 psi | 73% | 3153 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 80% | 45,063 psi | 71% | 3159 fps | 98% |
| Shooters World SW4350 | <<locked>> | 80% | 53,243 psi | 83% | 3281 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,795 psi | 84% | 3228 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,744 psi | 70% | 3153 fps | 97.9% |
| Somchem S361 | <<locked>> | 80% | 47,543 psi | 75% | 3136 fps | 96.9% |
| Somchem S365 | <<locked>> | 80% | 50,676 psi | 79% | 3245 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,629 psi | 72% | 3136 fps | 98.7% |
| Vihtavuori N165 | <<locked>> | 80% | 39,711 psi | 62% | 2989 fps | 97% |
| Vihtavuori N550 | <<locked>> | 80% | 53,896 psi | 84% | 3291 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,715 psi | 70% | 3146 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,903 psi | 69% | 3176 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 84% | 41,930 psi | 66% | 3104 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 90% | 45,876 psi | 72% | 3228 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,087 psi | 60% | 3100 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,916 psi | 66% | 3048 fps | 97.1% |
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 64 powders for 7 mm KM Katzmaier loaded with the .284 | 120gr | Nosler Ballistic Tip Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 3,517 fps; across all powders the maximum-charge window runs from 2,238 fps to 3,517 fps. ADI AR 2218 gives the best case fill at 100 %, and 64 of the 64 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 120.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-50 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, ReloadSwiss RS 76, Ramshot Grand rank at the top here: for 7 mm KM Katzmaier with the .284 | 120gr | Nosler Ballistic Tip Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-50, IMR 7977 Enduron, Lovex D100 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.