Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 140gr | Nosler Ballistic Tip Hunting bullet and 50 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 ReloadSwiss RS 80.
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% | 56,173 psi | 88% | 3120 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 55,259 psi | 87% | 3225 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 84% | 55,259 psi | 87% | 3225 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 84% | 57,130 psi | 90% | 3212 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,753 psi | 87% | 3228 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 94% | 54,911 psi | 86% | 3202 fps | 99.8% |
| ADI AR 2218 | <<locked>> | 98% | 55,782 psi | 87% | 3323 fps | 98.3% |
| ADI AR 2225 | <<locked>> | 96% | 54,447 psi | 85% | 3228 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,637 psi | 89% | 3199 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,275 psi | 88% | 3222 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,679 psi | 86% | 3127 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 55,158 psi | 86% | 3202 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 55,100 psi | 86% | 3212 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 53,621 psi | 84% | 3225 fps | 97.5% |
| Alliant Reloder-50 | <<locked>> | 98% | 53,664 psi | 84% | 3212 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,376 psi | 88% | 3182 fps | 98.2% |
| Bofors RP15 | <<locked>> | 88% | 55,869 psi | 88% | 3212 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 55,114 psi | 86% | 3215 fps | 99.8% |
| Bofors RP5 | <<locked>> | 86% | 56,275 psi | 88% | 3222 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,536 psi | 89% | 3228 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 54,737 psi | 86% | 3153 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,377 psi | 90% | 3199 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,290 psi | 90% | 3114 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,476 psi | 85% | 3294 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,840 psi | 59% | 2093 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,998 psi | 86% | 3133 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 86% | 54,375 psi | 85% | 3209 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 57,334 psi | 90% | 3268 fps | 99.9% |
| Lovex S071 | <<locked>> | 90% | 54,447 psi | 85% | 3094 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,853 psi | 86% | 3228 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,608 psi | 89% | 3238 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,666 psi | 87% | 3232 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 88% | 54,143 psi | 85% | 3153 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,769 psi | 61% | 2139 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 55,419 psi | 87% | 3274 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 54,723 psi | 86% | 3232 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 84% | 57,334 psi | 90% | 3179 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 56,536 psi | 89% | 3192 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,159 psi | 88% | 3189 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,332 psi | 87% | 3107 fps | 99.3% |
| Somchem S385 | <<locked>> | 84% | 56,782 psi | 89% | 3156 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,956 psi | 89% | 3143 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 56,347 psi | 88% | 3163 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 84% | 56,304 psi | 88% | 3159 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,970 psi | 88% | 3241 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 90% | 57,188 psi | 90% | 3232 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 92% | 55,056 psi | 86% | 3238 fps | 98.9% |
| Vihtavuori N570 | <<locked>> | 94% | 56,536 psi | 89% | 3307 fps | 97.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 55,042 psi | 86% | 3215 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,840 psi | 89% | 3156 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% | 45,905 psi | 72% | 2946 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 47,935 psi | 75% | 3087 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 80% | 47,935 psi | 75% | 3087 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 80% | 49,821 psi | 78% | 3084 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 45,107 psi | 71% | 3025 fps | 98.1% |
| ADI AR 2217 | <<locked>> | 82% | 36,114 psi | 57% | 2805 fps | 95.7% |
| ADI AR 2218 | 99.4 gr | 94% | 47,877 psi | 75% | 3159 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 80% | 31,024 psi | 49% | 2700 fps | 96.7% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,777 psi | 78% | 3081 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,890 psi | 72% | 3028 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,599 psi | 70% | 2956 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,812 psi | 61% | 2894 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 51,155 psi | 80% | 3146 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 46,050 psi | 72% | 3074 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 96% | 49,676 psi | 78% | 3136 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 46,253 psi | 72% | 2989 fps | 95.9% |
| Bofors RP15 | <<locked>> | 80% | 42,714 psi | 67% | 2959 fps | 98.5% |
| Bofors RP30 | <<locked>> | 80% | 36,361 psi | 57% | 2822 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 45,890 psi | 72% | 3028 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 80% | 36,579 psi | 57% | 2818 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 80% | 47,572 psi | 75% | 3022 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,775 psi | 73% | 3005 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,737 psi | 84% | 3061 fps | 100% |
| Hodgdon Retumbo | 79.9 gr | 80% | 37,956 psi | 59% | 2943 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,413 psi | 45% | 1877 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,312 psi | 76% | 3009 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 80% | 43,932 psi | 69% | 3005 fps | 97.9% |
| IMR 8133 Enduron | <<locked>> | 86% | 35,331 psi | 55% | 2808 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 39,392 psi | 62% | 2808 fps | 99.4% |
| Norma 217 | <<locked>> | 82% | 30,908 psi | 48% | 2700 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 48,994 psi | 77% | 3107 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 44,309 psi | 69% | 3018 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 80% | 40,074 psi | 63% | 2884 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,153 psi | 46% | 1923 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 37,478 psi | 59% | 2913 fps | 99% |
| ReloadSwiss RS 80 | 90.5 gr | 84% | 40,263 psi | 63% | 2940 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 50,372 psi | 79% | 3054 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 80% | 49,501 psi | 78% | 3071 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,153 psi | 77% | 3064 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 51,576 psi | 81% | 3041 fps | 98.9% |
| Somchem S385 | <<locked>> | 80% | 49,763 psi | 78% | 3038 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 43,685 psi | 68% | 2907 fps | 99.1% |
| Vihtavuori N170 | <<locked>> | 90% | 52,736 psi | 83% | 3097 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 80% | 49,356 psi | 77% | 3045 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,515 psi | 76% | 3104 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 80% | 40,480 psi | 63% | 2904 fps | 96.6% |
| Vihtavuori N568 | <<locked>> | 84% | 41,249 psi | 65% | 2956 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 90% | 48,936 psi | 77% | 3163 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,642 psi | 68% | 3025 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,093 psi | 72% | 2966 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 58 powders for 7 mm KM Katzmaier loaded with the .284 | 140gr | Nosler Ballistic Tip Hunting. ADI AR 2218 delivers the highest muzzle velocity at 3,323 fps; across all powders the maximum-charge window runs from 2,093 fps to 3,323 fps. Accurate 8700 gives the best case fill at 100 %, and 58 of the 58 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 140.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, Hodgdon US 869 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, ReloadSwiss RS 80 rank at the top here: for 7 mm KM Katzmaier with the .284 | 140gr | Nosler Ballistic Tip Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon US 869, Lovex D100, Ramshot LRT 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.