Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 135gr | CutEdge ER Raptor bullet and 57 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>> | 88% | 55,187 psi | 86% | 3156 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 54,404 psi | 85% | 3261 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 86% | 56,927 psi | 89% | 3261 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 88% | 55,405 psi | 87% | 3268 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 96% | 54,157 psi | 85% | 3238 fps | 99.6% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 3343 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 56,985 psi | 89% | 3323 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 56,927 psi | 89% | 3251 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,376 psi | 88% | 3245 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 88% | 55,738 psi | 87% | 3264 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 90% | 57,464 psi | 90% | 3225 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 54,012 psi | 85% | 3238 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,215 psi | 85% | 3251 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,304 psi | 88% | 3323 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,202 psi | 88% | 3222 fps | 97.8% |
| Bofors RP15 | <<locked>> | 90% | 54,955 psi | 86% | 3248 fps | 99.8% |
| Bofors RP30 | <<locked>> | 96% | 57,740 psi | 90% | 3310 fps | 99.9% |
| Bofors RP5 | <<locked>> | 88% | 55,738 psi | 87% | 3264 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 94% | 55,550 psi | 87% | 3261 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 86% | 54,505 psi | 85% | 3196 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,276 psi | 90% | 3245 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,884 psi | 89% | 3163 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 56,985 psi | 89% | 3392 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,550 psi | 59% | 2113 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,332 psi | 87% | 3173 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 55,796 psi | 87% | 3176 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 54,998 psi | 86% | 3179 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 90% | 57,696 psi | 90% | 3317 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,750 psi | 81% | 3222 fps | 99.3% |
| Lovex S070 | <<locked>> | 82% | 57,435 psi | 90% | 3205 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 57,014 psi | 89% | 3182 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,623 psi | 89% | 3235 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 52,953 psi | 83% | 3251 fps | 100% |
| Norma MRP | <<locked>> | 86% | 55,724 psi | 87% | 3278 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,537 psi | 90% | 3222 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 54,752 psi | 86% | 3268 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 82% | 56,565 psi | 89% | 3228 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 57,522 psi | 90% | 3258 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,421 psi | 60% | 2162 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 53,998 psi | 85% | 3310 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 57,595 psi | 90% | 3337 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 86% | 57,290 psi | 90% | 3225 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 86% | 56,101 psi | 88% | 3235 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 82% | 57,435 psi | 90% | 3205 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 55,709 psi | 87% | 3232 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 55,216 psi | 87% | 3150 fps | 99% |
| Somchem S365 | <<locked>> | 82% | 55,172 psi | 86% | 3166 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,318 psi | 88% | 3199 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,521 psi | 89% | 3186 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 55,709 psi | 87% | 3196 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 86% | 55,376 psi | 87% | 3199 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,230 psi | 87% | 3278 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 92% | 56,086 psi | 88% | 3264 fps | 99.4% |
| Vihtavuori N568 | <<locked>> | 94% | 53,954 psi | 85% | 3268 fps | 98.4% |
| Vihtavuori N570 | <<locked>> | 96% | 55,158 psi | 86% | 3330 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 90% | 57,682 psi | 90% | 3317 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,492 psi | 89% | 3196 fps | 99.9% |
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% | 41,771 psi | 65% | 2910 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 80% | 43,685 psi | 68% | 3045 fps | 96.1% |
| ADI AR 2209 | <<locked>> | 80% | 46,224 psi | 72% | 3061 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 80% | 41,510 psi | 65% | 2989 fps | 96.7% |
| ADI AR 2217 | <<locked>> | 86% | 37,840 psi | 59% | 2894 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 96% | 46,949 psi | 74% | 3176 fps | 95% |
| ADI AR 2225 | <<locked>> | 82% | 29,994 psi | 47% | 2710 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,156 psi | 83% | 3192 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,079 psi | 72% | 3051 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,148 psi | 66% | 2995 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,698 psi | 64% | 2936 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,143 psi | 55% | 2854 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,311 psi | 73% | 3110 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 48,124 psi | 75% | 3169 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 46,079 psi | 72% | 3028 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 39,102 psi | 61% | 2920 fps | 97% |
| Bofors RP30 | <<locked>> | 84% | 37,739 psi | 59% | 2904 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 42,148 psi | 66% | 2995 fps | 98% |
| Hodgdon H1000 | <<locked>> | 82% | 35,839 psi | 56% | 2844 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 80% | 44,106 psi | 69% | 2992 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,337 psi | 68% | 2979 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,835 psi | 78% | 3051 fps | 100% |
| Hodgdon Retumbo | 77.7 gr | 80% | 34,243 psi | 54% | 2881 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,137 psi | 44% | 1896 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,880 psi | 81% | 3114 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 52,243 psi | 82% | 3117 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,150 psi | 71% | 2989 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 80% | 40,045 psi | 63% | 2966 fps | 96.3% |
| IMR 8133 Enduron | <<locked>> | 90% | 36,303 psi | 57% | 2881 fps | 95.1% |
| Lovex S070 | <<locked>> | 80% | 53,853 psi | 84% | 3146 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,752 psi | 56% | 2772 fps | 98.4% |
| Norma 204 | <<locked>> | 80% | 52,794 psi | 83% | 3166 fps | 99.6% |
| Norma 217 | <<locked>> | 86% | 31,546 psi | 49% | 2769 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 44,802 psi | 70% | 3074 fps | 99.5% |
| Norma URP | <<locked>> | 80% | 53,824 psi | 84% | 3166 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 40,103 psi | 63% | 2976 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 80% | 52,837 psi | 83% | 3169 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,998 psi | 56% | 2835 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,834 psi | 45% | 1942 fps | 100% |
| ReloadSwiss RS 76 | 83.2 gr | 80% | 33,620 psi | 53% | 2851 fps | 97.1% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 42,090 psi | 66% | 3028 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 46,963 psi | 74% | 3035 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 80% | 45,556 psi | 71% | 3038 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 80% | 53,853 psi | 84% | 3146 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,208 psi | 71% | 3035 fps | 98.7% |
| Somchem S361 | <<locked>> | 80% | 48,153 psi | 75% | 3022 fps | 97.8% |
| Somchem S365 | <<locked>> | 80% | 51,503 psi | 81% | 3110 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,064 psi | 72% | 3015 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 80% | 40,089 psi | 63% | 2874 fps | 98.1% |
| Vihtavuori N170 | <<locked>> | 92% | 51,996 psi | 81% | 3127 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 45,150 psi | 71% | 3022 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,541 psi | 70% | 3064 fps | 97% |
| Vihtavuori N565 | <<locked>> | 82% | 39,363 psi | 62% | 2923 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 88% | 43,105 psi | 68% | 3048 fps | 95.6% |
| Vihtavuori N570 | 94.8 gr | 94% | 51,184 psi | 80% | 3255 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,769 psi | 61% | 2982 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,453 psi | 67% | 2936 fps | 98.1% |
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 | 135gr | CutEdge ER Raptor. Hodgdon Retumbo delivers the highest muzzle velocity at 3,392 fps; across all powders the maximum-charge window runs from 2,113 fps to 3,392 fps. Accurate 8700 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 135.0 gr projectile in 0.284" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2218, ADI AR 2225 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 | 135gr | CutEdge ER Raptor they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, 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.