Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 130gr | Fox Classic Hunter 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 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 55,492 psi | 87% | 3205 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 54,752 psi | 86% | 3310 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 86% | 57,145 psi | 90% | 3310 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 88% | 55,666 psi | 87% | 3320 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 96% | 54,360 psi | 85% | 3284 fps | 99.5% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,172 psi | 86% | 3396 fps | 97.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,392 psi | 90% | 3369 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 57,203 psi | 90% | 3304 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,000 psi | 89% | 3301 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,579 psi | 89% | 3294 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 88% | 55,999 psi | 88% | 3310 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 53,911 psi | 84% | 3215 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 54,360 psi | 85% | 3287 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,462 psi | 85% | 3297 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,898 psi | 89% | 3373 fps | 97.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,550 psi | 89% | 3271 fps | 97.6% |
| Bofors RP15 | <<locked>> | 90% | 55,201 psi | 87% | 3297 fps | 99.8% |
| Bofors RP30 | <<locked>> | 94% | 54,201 psi | 85% | 3294 fps | 99.5% |
| Bofors RP5 | <<locked>> | 88% | 55,999 psi | 88% | 3310 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 94% | 55,970 psi | 88% | 3310 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 86% | 54,607 psi | 86% | 3245 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,522 psi | 90% | 3294 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,087 psi | 89% | 3212 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,508 psi | 90% | 3445 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,521 psi | 59% | 2159 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,506 psi | 87% | 3222 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 55,985 psi | 88% | 3225 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,158 psi | 86% | 3225 fps | 99% |
| IMR 7828 SSC | <<locked>> | 88% | 53,896 psi | 84% | 3294 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,272 psi | 82% | 3271 fps | 99.2% |
| Lovex S070 | <<locked>> | 82% | 57,638 psi | 90% | 3258 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 57,276 psi | 90% | 3232 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,869 psi | 89% | 3284 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 53,229 psi | 83% | 3297 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,159 psi | 88% | 3330 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,158 psi | 86% | 3317 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 82% | 56,826 psi | 89% | 3281 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 53,708 psi | 84% | 3238 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,363 psi | 60% | 2208 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 54,520 psi | 85% | 3360 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 53,795 psi | 84% | 3307 fps | 98.6% |
| Rottweil R 904 | <<locked>> | 86% | 57,522 psi | 90% | 3274 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 86% | 56,318 psi | 88% | 3287 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 82% | 57,638 psi | 90% | 3258 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 55,927 psi | 88% | 3281 fps | 99.8% |
| Somchem S361 | <<locked>> | 84% | 55,434 psi | 87% | 3199 fps | 98.9% |
| Somchem S365 | <<locked>> | 82% | 55,376 psi | 87% | 3215 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,681 psi | 89% | 3251 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,710 psi | 89% | 3235 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 55,637 psi | 87% | 3248 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,637 psi | 87% | 3330 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 92% | 56,492 psi | 89% | 3314 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 94% | 54,389 psi | 85% | 3314 fps | 98.3% |
| Vihtavuori N570 | <<locked>> | 96% | 55,579 psi | 87% | 3379 fps | 96.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 53,867 psi | 84% | 3304 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,666 psi | 89% | 3245 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% | 41,989 psi | 66% | 2956 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 80% | 43,932 psi | 69% | 3087 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 46,282 psi | 73% | 3107 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 80% | 41,539 psi | 65% | 3028 fps | 96.4% |
| ADI AR 2217 | <<locked>> | 86% | 38,014 psi | 60% | 2933 fps | 95.6% |
| ADI AR 2218 | <<locked>> | 98% | 51,097 psi | 80% | 3307 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 84% | 32,314 psi | 51% | 2815 fps | 96.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,746 psi | 73% | 3107 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,330 psi | 84% | 3241 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,311 psi | 73% | 3100 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,177 psi | 66% | 3035 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,988 psi | 64% | 2982 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,230 psi | 55% | 2890 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,543 psi | 73% | 3159 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 48,631 psi | 76% | 3212 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 46,282 psi | 73% | 3071 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 39,189 psi | 61% | 2963 fps | 96.8% |
| Bofors RP30 | <<locked>> | 84% | 37,985 psi | 60% | 2946 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 42,177 psi | 66% | 3035 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 82% | 36,056 psi | 56% | 2884 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 80% | 44,309 psi | 69% | 3041 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,352 psi | 68% | 3018 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,009 psi | 78% | 3100 fps | 100% |
| Hodgdon Retumbo | 79.9 gr | 80% | 34,418 psi | 54% | 2923 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,094 psi | 44% | 1939 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,953 psi | 81% | 3163 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 52,518 psi | 82% | 3166 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,194 psi | 71% | 3031 fps | 97.1% |
| IMR 7828 SSC | <<locked>> | 80% | 40,248 psi | 63% | 3005 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 92% | 39,233 psi | 61% | 2992 fps | 96% |
| Lovex S070 | <<locked>> | 80% | 53,925 psi | 85% | 3196 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,926 psi | 56% | 2812 fps | 98.2% |
| Norma 204 | <<locked>> | 80% | 53,113 psi | 83% | 3219 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 31,749 psi | 50% | 2805 fps | 95% |
| Norma MRP | <<locked>> | 80% | 44,918 psi | 70% | 3117 fps | 99.3% |
| Ramshot Grand | <<locked>> | 80% | 40,219 psi | 63% | 3015 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 80% | 53,156 psi | 83% | 3219 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,216 psi | 57% | 2874 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,761 psi | 45% | 1982 fps | 100% |
| ReloadSwiss RS 76 | 85.5 gr | 80% | 33,765 psi | 53% | 2890 fps | 96.9% |
| ReloadSwiss RS 80 | 94.8 gr | 88% | 42,322 psi | 66% | 3068 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 47,239 psi | 74% | 3084 fps | 98% |
| Rottweil R 905 | <<locked>> | 80% | 45,788 psi | 72% | 3087 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 80% | 53,925 psi | 85% | 3196 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,455 psi | 71% | 3081 fps | 98.6% |
| Somchem S361 | <<locked>> | 80% | 48,341 psi | 76% | 3068 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 51,605 psi | 81% | 3159 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,108 psi | 72% | 3058 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 80% | 40,277 psi | 63% | 2920 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 45,295 psi | 71% | 3068 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,657 psi | 70% | 3107 fps | 96.8% |
| Vihtavuori N565 | <<locked>> | 82% | 39,595 psi | 62% | 2963 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 88% | 43,395 psi | 68% | 3087 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 94% | 51,677 psi | 81% | 3304 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,088 psi | 61% | 3028 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,598 psi | 67% | 2979 fps | 97.9% |
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 56 powders for 7 mm KM Katzmaier loaded with the .284 | 130gr | Fox Classic Hunter. Hodgdon Retumbo delivers the highest muzzle velocity at 3,445 fps; across all powders the maximum-charge window runs from 2,159 fps to 3,445 fps. ADI AR 2218 gives the best case fill at 100 %, and 56 of the 56 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 130.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Hodgdon TrailBoss 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, ReloadSwiss RS 80 rank at the top here: for 7 mm KM Katzmaier with the .284 | 130gr | Fox Classic Hunter 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.