Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 165gr | Sierra Tipped GameKing bullet and 48 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and Alliant Reloder-50.
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>> | 84% | 56,797 psi | 89% | 2923 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 52,750 psi | 83% | 2969 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 82% | 56,115 psi | 88% | 3038 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 82% | 57,638 psi | 90% | 3012 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 56,594 psi | 89% | 3035 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,144 psi | 88% | 3018 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,797 psi | 89% | 3153 fps | 99.5% |
| ADI AR 2225 | <<locked>> | 94% | 56,028 psi | 88% | 3041 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,188 psi | 90% | 2999 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,130 psi | 90% | 3025 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 55,593 psi | 87% | 2927 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 56,376 psi | 88% | 3005 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 54,940 psi | 86% | 3061 fps | 99% |
| Alliant Reloder-50 | <<locked>> | 96% | 55,085 psi | 86% | 3054 fps | 98.6% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,579 psi | 89% | 2992 fps | 99.2% |
| Bofors RP15 | <<locked>> | 86% | 56,550 psi | 89% | 3015 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,333 psi | 88% | 3035 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,130 psi | 90% | 3025 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 57,551 psi | 90% | 3035 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,143 psi | 86% | 2963 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 82% | 53,998 psi | 85% | 2943 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,144 psi | 88% | 3104 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,014 psi | 60% | 1932 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,216 psi | 87% | 2936 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 84% | 55,274 psi | 87% | 3018 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 57,435 psi | 90% | 2946 fps | 96.8% |
| IMR 8133 Enduron | <<locked>> | 96% | 54,940 psi | 86% | 3028 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 55,448 psi | 87% | 2904 fps | 100% |
| Norma 217 | <<locked>> | 96% | 56,492 psi | 89% | 3048 fps | 100% |
| Norma MRP | <<locked>> | 82% | 57,334 psi | 90% | 3038 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 56,695 psi | 89% | 3038 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 55,129 psi | 86% | 2966 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,175 psi | 61% | 1982 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,000 psi | 89% | 3087 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,014 psi | 88% | 3058 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 57,116 psi | 90% | 2992 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 54,679 psi | 86% | 2979 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 56,753 psi | 89% | 2989 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 57,217 psi | 90% | 2956 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 57,435 psi | 90% | 2946 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,913 psi | 89% | 2986 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 82% | 57,246 psi | 90% | 2956 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 56,565 psi | 89% | 3045 fps | 100% |
| Vihtavuori N565 | <<locked>> | 86% | 54,433 psi | 85% | 2989 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 56,362 psi | 88% | 3064 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 90% | 53,940 psi | 85% | 3064 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 56,681 psi | 89% | 3018 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,217 psi | 90% | 2959 fps | 100% |
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% | 49,763 psi | 78% | 2815 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 42,235 psi | 66% | 2769 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 80% | 52,199 psi | 82% | 2976 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 80% | 53,925 psi | 85% | 2953 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 49,182 psi | 77% | 2910 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 80% | 36,796 psi | 58% | 2651 fps | 97.8% |
| ADI AR 2218 | 90 gr | 88% | 42,279 psi | 66% | 2861 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 80% | 34,200 psi | 54% | 2628 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 80% | 53,621 psi | 84% | 2943 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,937 psi | 78% | 2907 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 48,660 psi | 76% | 2822 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,931 psi | 67% | 2785 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 84% | 40,596 psi | 64% | 2779 fps | 95.4% |
| Alliant Reloder-50 | 93.4 gr | 90% | 44,135 psi | 69% | 2844 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,441 psi | 73% | 2812 fps | 97.5% |
| Bofors RP15 | <<locked>> | 80% | 46,456 psi | 73% | 2844 fps | 99.8% |
| Bofors RP30 | <<locked>> | 80% | 40,074 psi | 63% | 2730 fps | 98.6% |
| Bofors RP5 | <<locked>> | 80% | 49,937 psi | 78% | 2907 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 40,132 psi | 63% | 2730 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 80% | 51,416 psi | 81% | 2900 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,560 psi | 79% | 2884 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,047 psi | 66% | 2851 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,660 psi | 45% | 1732 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,837 psi | 81% | 2881 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 80% | 48,037 psi | 75% | 2894 fps | 99.6% |
| IMR 7977 Enduron | <<locked>> | 86% | 50,459 psi | 79% | 2828 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 80% | 31,778 psi | 50% | 2543 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 42,946 psi | 67% | 2697 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,300 psi | 51% | 2572 fps | 98% |
| Norma MRP | <<locked>> | 80% | 53,447 psi | 84% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 48,834 psi | 77% | 2913 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 80% | 44,092 psi | 69% | 2779 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,486 psi | 46% | 1775 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 41,727 psi | 65% | 2828 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,435 psi | 60% | 2720 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 80% | 53,461 psi | 84% | 2936 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 44,425 psi | 70% | 2792 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,113 psi | 83% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 53,664 psi | 84% | 2900 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,253 psi | 74% | 2785 fps | 100% |
| Vihtavuori N170 | <<locked>> | 84% | 46,528 psi | 73% | 2799 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 80% | 53,635 psi | 84% | 2904 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 52,779 psi | 83% | 2982 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 80% | 44,411 psi | 70% | 2805 fps | 98.9% |
| Vihtavuori N568 | <<locked>> | 80% | 39,378 psi | 62% | 2733 fps | 96.6% |
| Vihtavuori N570 | 84.1 gr | 84% | 43,453 psi | 68% | 2861 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 48,950 psi | 77% | 2907 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,777 psi | 78% | 2841 fps | 100% |
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 48 powders for 7 mm KM Katzmaier loaded with the .284 | 165gr | Sierra Tipped GameKing. ADI AR 2218 delivers the highest muzzle velocity at 3,153 fps; across all powders the maximum-charge window runs from 1,932 fps to 3,153 fps. Accurate 8700 gives the best case fill at 100 %, and 48 of the 48 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.284" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 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. ADI AR 2218, Vihtavuori N570, Alliant Reloder-50 rank at the top here: for 7 mm KM Katzmaier with the .284 | 165gr | Sierra Tipped GameKing 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.