Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 127gr | RWS Evolution Green bullet and 64 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, IMR 7828 SSC and Winchester StaBALL HD.
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>> | 90% | 56,942 psi | 89% | 3258 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,087 psi | 89% | 3287 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 56,086 psi | 88% | 3363 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 86% | 54,824 psi | 86% | 3301 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 90% | 56,956 psi | 89% | 3369 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 98% | 55,579 psi | 87% | 3333 fps | 99.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,143 psi | 85% | 3353 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 54,810 psi | 86% | 3297 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 54,331 psi | 85% | 3284 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,203 psi | 90% | 3363 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,100 psi | 86% | 3271 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,463 psi | 87% | 3340 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,869 psi | 88% | 3360 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 53,577 psi | 84% | 3343 fps | 96.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,230 psi | 85% | 3255 fps | 96.8% |
| Bofors RP15 | <<locked>> | 92% | 56,565 psi | 89% | 3350 fps | 99.8% |
| Bofors RP30 | <<locked>> | 96% | 55,129 psi | 86% | 3343 fps | 99.4% |
| Bofors RP5 | <<locked>> | 90% | 57,203 psi | 90% | 3363 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 96% | 57,203 psi | 90% | 3363 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 88% | 56,159 psi | 88% | 3297 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,143 psi | 86% | 3278 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 54,853 psi | 86% | 3209 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,389 psi | 85% | 3425 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,376 psi | 59% | 2172 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,087 psi | 89% | 3278 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,522 psi | 90% | 3281 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,695 psi | 89% | 3278 fps | 99% |
| IMR 7828 SSC | <<locked>> | 90% | 55,230 psi | 87% | 3350 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,356 psi | 77% | 3248 fps | 98.6% |
| Lovex S065 | <<locked>> | 82% | 57,101 psi | 89% | 3255 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,593 psi | 87% | 3251 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 54,737 psi | 86% | 3222 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,621 psi | 86% | 3274 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 50,125 psi | 79% | 3274 fps | 99.8% |
| Norma MRP | <<locked>> | 88% | 57,493 psi | 90% | 3383 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,521 psi | 87% | 3271 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,347 psi | 88% | 3369 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 82% | 54,534 psi | 85% | 3274 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,027 psi | 86% | 3291 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,203 psi | 60% | 2218 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,580 psi | 90% | 3310 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,391 psi | 88% | 3340 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,463 psi | 87% | 3409 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 54,824 psi | 86% | 3360 fps | 98.6% |
| Rottweil R 904 | <<locked>> | 86% | 55,347 psi | 87% | 3264 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 88% | 57,725 psi | 90% | 3337 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,101 psi | 89% | 3255 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,593 psi | 87% | 3251 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,144 psi | 88% | 3202 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,319 psi | 90% | 3333 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 57,188 psi | 90% | 3251 fps | 98.9% |
| Somchem S365 | <<locked>> | 84% | 56,768 psi | 89% | 3271 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 54,288 psi | 85% | 3238 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 82% | 57,000 psi | 89% | 3261 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 54,375 psi | 85% | 3225 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 82% | 56,391 psi | 88% | 3264 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,855 psi | 89% | 3301 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,000 psi | 89% | 3383 fps | 99% |
| Vihtavuori N565 | <<locked>> | 92% | 53,824 psi | 84% | 3294 fps | 98.8% |
| Vihtavuori N568 | <<locked>> | 96% | 55,434 psi | 87% | 3366 fps | 98.2% |
| Vihtavuori N570 | <<locked>> | 98% | 56,608 psi | 89% | 3428 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,913 psi | 89% | 3202 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 54,650 psi | 86% | 3353 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 54,317 psi | 85% | 3235 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% | 40,030 psi | 63% | 2940 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 53,272 psi | 83% | 3228 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 44,918 psi | 70% | 3136 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 44,483 psi | 70% | 3097 fps | 98% |
| ADI AR 2213 | <<locked>> | 80% | 39,668 psi | 62% | 3009 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 88% | 38,841 psi | 61% | 2979 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 86% | 32,982 psi | 52% | 2861 fps | 96.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,184 psi | 80% | 3238 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,382 psi | 70% | 3087 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,219 psi | 63% | 3018 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,914 psi | 61% | 2969 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,562 psi | 53% | 2874 fps | 98% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,048 psi | 69% | 3143 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 49,501 psi | 78% | 3264 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,543 psi | 75% | 3120 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 37,434 psi | 59% | 2946 fps | 95.8% |
| Bofors RP30 | <<locked>> | 86% | 38,580 psi | 60% | 2992 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 40,219 psi | 63% | 3018 fps | 96.9% |
| Hodgdon H1000 | <<locked>> | 84% | 36,941 psi | 58% | 2936 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 80% | 42,279 psi | 66% | 3018 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,524 psi | 65% | 3002 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,993 psi | 75% | 3097 fps | 100% |
| Hodgdon Retumbo | 80 gr | 82% | 35,201 psi | 55% | 2972 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,876 psi | 44% | 1949 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,198 psi | 79% | 3156 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 50,357 psi | 79% | 3163 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,613 psi | 68% | 3022 fps | 96.2% |
| IMR 7828 SSC | 79.9 gr | 82% | 41,307 psi | 65% | 3061 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 94% | 39,769 psi | 62% | 3035 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 53,563 psi | 84% | 3196 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,112 psi | 82% | 3192 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 34,243 psi | 54% | 2795 fps | 97.4% |
| Norma 204 | <<locked>> | 80% | 50,923 psi | 80% | 3205 fps | 99.1% |
| Norma 217 | <<locked>> | 90% | 34,679 psi | 54% | 2920 fps | 96.2% |
| Norma MRP | <<locked>> | 80% | 42,815 psi | 67% | 3100 fps | 98.8% |
| Norma URP | <<locked>> | 80% | 51,953 psi | 81% | 3212 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,218 psi | 60% | 2992 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 50,923 psi | 80% | 3209 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,229 psi | 54% | 2848 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,674 psi | 45% | 1995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,708 psi | 84% | 3248 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,446 psi | 82% | 3278 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 31,981 psi | 50% | 2858 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 43,163 psi | 68% | 3120 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 45,368 psi | 71% | 3071 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 80% | 43,787 psi | 69% | 3071 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,563 psi | 84% | 3196 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,112 psi | 82% | 3192 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,576 psi | 82% | 3143 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,453 psi | 68% | 3068 fps | 97.9% |
| Somchem S361 | <<locked>> | 80% | 46,470 psi | 73% | 3054 fps | 96.9% |
| Somchem S365 | <<locked>> | 80% | 49,443 psi | 77% | 3156 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,193 psi | 69% | 3045 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 80% | 53,345 psi | 84% | 3202 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,508 psi | 60% | 2904 fps | 97% |
| Vihtavuori N550 | <<locked>> | 80% | 52,692 psi | 83% | 3205 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,308 psi | 68% | 3058 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,656 psi | 67% | 3091 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 84% | 40,422 psi | 63% | 3012 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 90% | 44,266 psi | 69% | 3140 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 96% | 52,562 psi | 82% | 3350 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,011 psi | 83% | 3143 fps | 100% |
| Winchester StaBALL HD | 80.1 gr | 80% | 36,463 psi | 57% | 3005 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,770 psi | 64% | 2966 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 | 127gr | RWS Evolution Green. Vihtavuori N570 delivers the highest muzzle velocity at 3,428 fps; across all powders the maximum-charge window runs from 2,172 fps to 3,428 fps. ADI AR 2225 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 127.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, 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. Hodgdon Retumbo, IMR 7828 SSC, Winchester StaBALL HD rank at the top here: for 7 mm KM Katzmaier with the .284 | 127gr | RWS Evolution Green 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.