Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 100gr | Sierra VarmintKing bullet and 67 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 Ramshot Grand.
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>> | 92% | 56,202 psi | 88% | 3527 fps | 99.9% |
| Accurate 4350 | <<locked>> | 84% | 56,550 psi | 89% | 3579 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 55,230 psi | 87% | 3619 fps | 96.6% |
| ADI AR 2209 | <<locked>> | 88% | 53,911 psi | 84% | 3563 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 92% | 55,999 psi | 88% | 3632 fps | 97.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,476 psi | 85% | 3576 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,037 psi | 77% | 3520 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,493 psi | 90% | 3648 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,319 psi | 90% | 3619 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,318 psi | 88% | 3629 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,609 psi | 90% | 3606 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,740 psi | 90% | 3668 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,505 psi | 85% | 3629 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 55,288 psi | 87% | 3606 fps | 98.6% |
| Bofors RP30 | <<locked>> | 98% | 53,679 psi | 84% | 3586 fps | 97.9% |
| Bofors RP5 | <<locked>> | 92% | 56,318 psi | 88% | 3629 fps | 98.8% |
| Bofors RP7 | <<locked>> | 82% | 54,476 psi | 85% | 3514 fps | 99% |
| Hodgdon H1000 | <<locked>> | 98% | 55,999 psi | 88% | 3612 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 54,433 psi | 85% | 3570 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 82% | 56,637 psi | 89% | 3589 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 90% | 55,506 psi | 87% | 3560 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,404 psi | 85% | 3537 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,027 psi | 85% | 3494 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,550 psi | 89% | 3750 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 82% | 55,230 psi | 87% | 3596 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,072 psi | 58% | 2418 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,710 psi | 89% | 3556 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,956 psi | 88% | 3547 fps | 99.5% |
| IMR 4831 | <<locked>> | 86% | 57,000 psi | 89% | 3566 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,217 psi | 88% | 3543 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 92% | 53,998 psi | 85% | 3602 fps | 97.5% |
| Lovex S065 | <<locked>> | 84% | 56,942 psi | 89% | 3547 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,245 psi | 87% | 3533 fps | 99.5% |
| Lovex S071 | <<locked>> | 98% | 57,522 psi | 90% | 3550 fps | 99.9% |
| Norma 204 | <<locked>> | 84% | 54,186 psi | 85% | 3547 fps | 98.2% |
| Norma 217ᴾ | <<locked>> | 100% | 44,759 psi | 70% | 3422 fps | 97.7% |
| Norma MRP | <<locked>> | 90% | 56,333 psi | 88% | 3648 fps | 99.6% |
| Norma URP | <<locked>> | 84% | 54,810 psi | 86% | 3560 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,868 psi | 86% | 3622 fps | 98% |
| Ramshot Hunter | <<locked>> | 84% | 53,954 psi | 85% | 3553 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 94% | 53,853 psi | 84% | 3543 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,797 psi | 59% | 2470 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,927 psi | 89% | 3596 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,477 psi | 87% | 3629 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 53,867 psi | 84% | 3658 fps | 99.8% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 53,505 psi | 84% | 3593 fps | 96.5% |
| Rottweil R 904 | <<locked>> | 88% | 54,839 psi | 86% | 3530 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 90% | 56,826 psi | 89% | 3606 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 82% | 54,476 psi | 85% | 3514 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,942 psi | 89% | 3547 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,245 psi | 87% | 3533 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,130 psi | 88% | 3484 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,391 psi | 88% | 3599 fps | 98.8% |
| Somchem S361 | <<locked>> | 88% | 56,811 psi | 89% | 3510 fps | 97.4% |
| Somchem S365 | <<locked>> | 86% | 55,811 psi | 87% | 3563 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,450 psi | 90% | 3573 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 82% | 56,927 psi | 89% | 3488 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,434 psi | 88% | 3550 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,406 psi | 90% | 3550 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 84% | 55,956 psi | 88% | 3553 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,724 psi | 87% | 3579 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,941 psi | 88% | 3642 fps | 97.4% |
| Vihtavuori N565 | <<locked>> | 96% | 56,652 psi | 89% | 3612 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,521 psi | 89% | 3488 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,433 psi | 85% | 3570 fps | 99.4% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,869 psi | 89% | 3691 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,740 psi | 90% | 3566 fps | 99% |
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% | 36,796 psi | 58% | 3107 fps | 96.2% |
| Accurate 4350 | <<locked>> | 80% | 48,994 psi | 77% | 3438 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 88% | 51,184 psi | 80% | 3537 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 82% | 43,656 psi | 68% | 3343 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 88% | 48,544 psi | 76% | 3478 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 96% | 47,297 psi | 74% | 3425 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 92% | 37,188 psi | 58% | 3215 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,659 psi | 73% | 3445 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 82% | 43,743 psi | 69% | 3337 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 84% | 42,395 psi | 66% | 3330 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,346 psi | 55% | 3146 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 82% | 32,851 psi | 51% | 3087 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,537 psi | 62% | 3304 fps | 98.4% |
| Bofors RP15 | <<locked>> | 86% | 42,090 psi | 66% | 3320 fps | 95.2% |
| Bofors RP30 | <<locked>> | 94% | 46,615 psi | 73% | 3438 fps | 96.1% |
| Bofors RP5 | <<locked>> | 84% | 42,395 psi | 66% | 3330 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 51,039 psi | 80% | 3445 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 92% | 45,136 psi | 71% | 3379 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 50,720 psi | 79% | 3497 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 52,881 psi | 83% | 3517 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 86% | 48,283 psi | 76% | 3409 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 88% | 50,807 psi | 80% | 3465 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,034 psi | 69% | 3307 fps | 100% |
| Hodgdon Retumbo | 90 gr | 88% | 39,639 psi | 62% | 3340 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 51,242 psi | 80% | 3517 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,673 psi | 43% | 2178 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,514 psi | 73% | 3353 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,475 psi | 82% | 3478 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 46,427 psi | 73% | 3369 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 49,414 psi | 77% | 3409 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 88% | 46,717 psi | 73% | 3448 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 50,038 psi | 78% | 3419 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 48,472 psi | 76% | 3399 fps | 98.6% |
| Lovex S071 | <<locked>> | 84% | 36,129 psi | 57% | 3091 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 47,021 psi | 74% | 3396 fps | 96.6% |
| Norma 217 | <<locked>> | 96% | 38,653 psi | 61% | 3271 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 38,798 psi | 61% | 3261 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 47,892 psi | 75% | 3425 fps | 99.7% |
| Ramshot Grand | 92.6 gr | 88% | 47,007 psi | 74% | 3461 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 46,934 psi | 74% | 3409 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 86% | 39,233 psi | 61% | 3222 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,239 psi | 44% | 2228 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,284 psi | 77% | 3455 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,543 psi | 75% | 3474 fps | 99.7% |
| ReloadSwiss RS 76 | 94.1 gr | 86% | 36,622 psi | 57% | 3228 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 49,313 psi | 77% | 3504 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 84% | 48,008 psi | 75% | 3389 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 82% | 43,018 psi | 67% | 3317 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 51,039 psi | 80% | 3445 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,038 psi | 78% | 3419 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 48,472 psi | 76% | 3399 fps | 98.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,052 psi | 77% | 3350 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 42,656 psi | 67% | 3310 fps | 95.6% |
| Somchem S361 | <<locked>> | 84% | 49,574 psi | 78% | 3369 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 45,063 psi | 71% | 3366 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,799 psi | 64% | 3222 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 53,301 psi | 84% | 3428 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,211 psi | 77% | 3419 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 40,669 psi | 64% | 3205 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 48,791 psi | 76% | 3415 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 39,610 psi | 62% | 3241 fps | 98.9% |
| Vihtavuori N560 | <<locked>> | 86% | 48,269 psi | 76% | 3481 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 92% | 49,110 psi | 77% | 3461 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,878 psi | 77% | 3363 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,894 psi | 80% | 3497 fps | 98.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,894 psi | 50% | 3146 fps | 99% |
| Winchester Supreme 780 | <<locked>> | 84% | 43,352 psi | 68% | 3278 fps | 95.8% |
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 73 powders for 7 mm KM Katzmaier loaded with the .284 | 100gr | Sierra VarmintKing. Hodgdon Retumbo delivers the highest muzzle velocity at 3,750 fps; across all powders the maximum-charge window runs from 2,418 fps to 3,750 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.284" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, 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, Ramshot Grand rank at the top here: for 7 mm KM Katzmaier with the .284 | 100gr | Sierra VarmintKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, Vihtavuori N170, Vihtavuori N570 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.