Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 110gr | Speer TNT bullet and 66 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 Vihtavuori N560.
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% | 56,014 psi | 88% | 3412 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,144 psi | 88% | 3455 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 54,897 psi | 86% | 3504 fps | 97.3% |
| ADI AR 2209 | <<locked>> | 88% | 57,319 psi | 90% | 3514 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 90% | 55,608 psi | 87% | 3514 fps | 98.4% |
| ADI AR 2217 | <<locked>> | 98% | 54,360 psi | 85% | 3471 fps | 98.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,837 psi | 83% | 3491 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,159 psi | 90% | 3520 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,927 psi | 89% | 3501 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,028 psi | 88% | 3510 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 92% | 57,595 psi | 90% | 3484 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 54,070 psi | 85% | 3488 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 54,447 psi | 85% | 3507 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 56,782 psi | 89% | 3461 fps | 96.3% |
| Bofors RP15 | <<locked>> | 92% | 55,216 psi | 87% | 3494 fps | 99.1% |
| Bofors RP30 | <<locked>> | 96% | 53,896 psi | 84% | 3481 fps | 98.6% |
| Bofors RP5 | <<locked>> | 90% | 56,028 psi | 88% | 3510 fps | 99.3% |
| Bofors RP7 | <<locked>> | 82% | 57,334 psi | 90% | 3451 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 96% | 55,912 psi | 88% | 3501 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 82% | 57,725 psi | 90% | 3510 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 88% | 54,969 psi | 86% | 3438 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,027 psi | 85% | 3422 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,406 psi | 90% | 3428 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 56,666 psi | 89% | 3635 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,333 psi | 59% | 2326 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,912 psi | 88% | 3428 fps | 99.7% |
| IMR 4831 | <<locked>> | 84% | 56,594 psi | 89% | 3442 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,622 psi | 87% | 3425 fps | 98% |
| IMR 7828 SSC | <<locked>> | 90% | 53,795 psi | 84% | 3488 fps | 98.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,240 psi | 76% | 3376 fps | 97.3% |
| Lovex S065 | <<locked>> | 82% | 56,231 psi | 88% | 3419 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,679 psi | 86% | 3409 fps | 99.8% |
| Lovex S071 | <<locked>> | 96% | 57,537 psi | 90% | 3435 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,435 psi | 90% | 3494 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 48,878 psi | 77% | 3406 fps | 99.2% |
| Norma MRP | <<locked>> | 88% | 56,231 psi | 88% | 3533 fps | 99.9% |
| Norma URP | <<locked>> | 82% | 54,404 psi | 85% | 3432 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 54,810 psi | 86% | 3510 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 84% | 57,276 psi | 90% | 3494 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 53,621 psi | 84% | 3428 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,101 psi | 60% | 2375 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,565 psi | 89% | 3471 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 54,998 psi | 86% | 3497 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,099 psi | 85% | 3550 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 53,635 psi | 84% | 3488 fps | 97.4% |
| Rottweil R 904 | <<locked>> | 86% | 54,288 psi | 85% | 3412 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 88% | 56,492 psi | 89% | 3488 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 82% | 57,334 psi | 90% | 3451 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,231 psi | 88% | 3419 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,679 psi | 86% | 3409 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,376 psi | 87% | 3360 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,130 psi | 88% | 3481 fps | 99.3% |
| Somchem S361 | <<locked>> | 86% | 56,028 psi | 88% | 3392 fps | 98% |
| Somchem S365 | <<locked>> | 84% | 55,477 psi | 87% | 3435 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,130 psi | 90% | 3458 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 82% | 55,970 psi | 88% | 3422 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 56,913 psi | 89% | 3428 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 82% | 55,361 psi | 87% | 3422 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,695 psi | 87% | 3455 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 55,695 psi | 87% | 3527 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 94% | 56,594 psi | 89% | 3504 fps | 98.4% |
| Vihtavuori N568 | <<locked>> | 96% | 54,128 psi | 85% | 3497 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 55,738 psi | 87% | 3360 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,725 psi | 90% | 3510 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,464 psi | 90% | 3573 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,145 psi | 90% | 3448 fps | 99.4% |
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% | 39,479 psi | 62% | 3074 fps | 97.9% |
| Accurate 4350 | <<locked>> | 80% | 52,243 psi | 82% | 3383 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 47,471 psi | 74% | 3350 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 43,439 psi | 68% | 3232 fps | 96.6% |
| ADI AR 2213 | <<locked>> | 84% | 44,831 psi | 70% | 3291 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 92% | 43,859 psi | 69% | 3248 fps | 96% |
| ADI AR 2225 | <<locked>> | 88% | 34,809 psi | 55% | 3048 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,806 psi | 78% | 3389 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,410 psi | 68% | 3219 fps | 96.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,436 psi | 62% | 3150 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,130 psi | 60% | 3110 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,924 psi | 52% | 2995 fps | 96.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,975 psi | 67% | 3281 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 53,287 psi | 84% | 3392 fps | 95.4% |
| Bofors RP15 | <<locked>> | 82% | 39,349 psi | 62% | 3143 fps | 95.1% |
| Bofors RP30 | <<locked>> | 90% | 43,613 psi | 68% | 3264 fps | 96.1% |
| Bofors RP5 | <<locked>> | 80% | 39,436 psi | 62% | 3150 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 53,751 psi | 84% | 3389 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 41,872 psi | 66% | 3205 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 53,853 psi | 84% | 3442 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 82% | 44,512 psi | 70% | 3222 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 84% | 46,847 psi | 73% | 3278 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,934 psi | 74% | 3248 fps | 100% |
| Hodgdon Retumbo | 87.9 gr | 86% | 39,668 psi | 62% | 3245 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,891 psi | 44% | 2093 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,168 psi | 77% | 3301 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 49,371 psi | 77% | 3317 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 45,687 psi | 72% | 3225 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 84% | 43,366 psi | 68% | 3264 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 96% | 41,829 psi | 66% | 3228 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 52,736 psi | 83% | 3356 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 51,227 psi | 80% | 3343 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 33,823 psi | 53% | 2927 fps | 96% |
| Norma 204 | <<locked>> | 80% | 49,922 psi | 78% | 3350 fps | 98.1% |
| Norma 217 | <<locked>> | 92% | 36,463 psi | 57% | 3110 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 41,843 psi | 66% | 3235 fps | 97.6% |
| Norma URP | <<locked>> | 80% | 50,879 psi | 80% | 3366 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 43,526 psi | 68% | 3271 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 49,908 psi | 78% | 3356 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 36,303 psi | 57% | 3045 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,514 psi | 45% | 2139 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,591 psi | 82% | 3402 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,981 psi | 80% | 3425 fps | 100% |
| ReloadSwiss RS 76 | 91.9 gr | 84% | 36,651 psi | 57% | 3136 fps | 96.3% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 45,745 psi | 72% | 3323 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 44,498 psi | 70% | 3209 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 42,888 psi | 67% | 3209 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 80% | 53,751 psi | 84% | 3389 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,736 psi | 83% | 3356 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 51,227 psi | 80% | 3343 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,663 psi | 81% | 3294 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,540 psi | 67% | 3202 fps | 96.5% |
| Somchem S361 | <<locked>> | 80% | 45,571 psi | 71% | 3186 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 48,298 psi | 76% | 3314 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,482 psi | 68% | 3186 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 80% | 52,185 psi | 82% | 3360 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,753 psi | 59% | 3031 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 51,706 psi | 81% | 3360 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,540 psi | 67% | 3202 fps | 99.8% |
| Vihtavuori N560 | 87 gr | 82% | 44,817 psi | 70% | 3294 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 88% | 45,774 psi | 72% | 3287 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 94% | 50,299 psi | 79% | 3419 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,866 psi | 81% | 3297 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 54,027 psi | 85% | 3448 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,389 psi | 55% | 3133 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,987 psi | 63% | 3094 fps | 95.6% |
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 72 powders for 7 mm KM Katzmaier loaded with the .284 | 110gr | Speer TNT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,635 fps; across all powders the maximum-charge window runs from 2,326 fps to 3,635 fps. ADI AR 2218 gives the best case fill at 100 %, and 72 of the 72 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 110.0 gr projectile in 0.284" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-33 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, Vihtavuori N560 rank at the top here: for 7 mm KM Katzmaier with the .284 | 110gr | Speer TNT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-50, IMR 7977 Enduron 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.