Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 160gr | Alaska Bullet Works Kodiak SP SPBC bullet and 45 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 IMR 8133 Enduron.
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% | 57,392 psi | 90% | 2969 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,650 psi | 84% | 3015 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 82% | 56,565 psi | 89% | 3084 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 84% | 57,101 psi | 89% | 3081 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,840 psi | 89% | 3064 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 57,624 psi | 90% | 3202 fps | 99.5% |
| ADI AR 2225 | <<locked>> | 94% | 56,637 psi | 89% | 3087 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,624 psi | 90% | 3045 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,682 psi | 90% | 3074 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,057 psi | 88% | 2972 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 56,840 psi | 89% | 3051 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,651 psi | 87% | 3107 fps | 99% |
| Alliant Reloder-50 | <<locked>> | 96% | 55,869 psi | 88% | 3100 fps | 98.6% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,130 psi | 90% | 3038 fps | 99.2% |
| Bofors RP15 | <<locked>> | 86% | 57,087 psi | 89% | 3061 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,855 psi | 89% | 3077 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,682 psi | 90% | 3074 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 54,215 psi | 85% | 3022 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,477 psi | 87% | 3005 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 82% | 54,578 psi | 86% | 2989 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,797 psi | 89% | 3153 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,101 psi | 60% | 1972 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,463 psi | 87% | 2979 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 84% | 55,666 psi | 87% | 3061 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,360 psi | 85% | 2933 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,738 psi | 87% | 3074 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 55,840 psi | 88% | 2946 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,290 psi | 90% | 3094 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,159 psi | 90% | 3087 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 55,651 psi | 87% | 3009 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,088 psi | 61% | 2018 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,609 psi | 90% | 3133 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,681 psi | 89% | 3107 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 57,580 psi | 90% | 3038 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,274 psi | 87% | 3022 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,203 psi | 90% | 3035 fps | 100% |
| Vihtavuori N165 | <<locked>> | 84% | 54,360 psi | 85% | 2940 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,580 psi | 90% | 3031 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 82% | 57,566 psi | 90% | 2999 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,072 psi | 89% | 3094 fps | 100% |
| Vihtavuori N565 | <<locked>> | 86% | 54,824 psi | 86% | 3031 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 56,927 psi | 89% | 3107 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 90% | 54,708 psi | 86% | 3114 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,450 psi | 90% | 3068 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,711 psi | 90% | 3002 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% | 50,125 psi | 79% | 2858 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 42,888 psi | 67% | 2812 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 80% | 52,678 psi | 83% | 3018 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 49,647 psi | 78% | 2953 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 80% | 37,246 psi | 58% | 2694 fps | 97.7% |
| ADI AR 2218 | 92.6 gr | 88% | 42,757 psi | 67% | 2900 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 34,490 psi | 54% | 2664 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 80% | 53,954 psi | 85% | 2986 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,401 psi | 79% | 2953 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,081 psi | 77% | 2867 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,265 psi | 68% | 2825 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 84% | 41,205 psi | 65% | 2822 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 90% | 44,701 psi | 70% | 2887 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,876 psi | 73% | 2854 fps | 97.4% |
| Bofors RP15 | <<locked>> | 80% | 46,949 psi | 74% | 2887 fps | 99.8% |
| Bofors RP30 | <<locked>> | 80% | 40,408 psi | 63% | 2772 fps | 98.5% |
| Bofors RP5 | <<locked>> | 80% | 50,401 psi | 79% | 2953 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 40,582 psi | 64% | 2772 fps | 99% |
| Hodgdon H4831 | <<locked>> | 80% | 51,866 psi | 81% | 2946 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,995 psi | 80% | 2930 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,366 psi | 66% | 2890 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,587 psi | 45% | 1765 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,141 psi | 82% | 2923 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 80% | 48,530 psi | 76% | 2940 fps | 99.6% |
| IMR 7977 Enduron | <<locked>> | 86% | 50,879 psi | 80% | 2874 fps | 95.1% |
| IMR 8133 Enduron | 77.3 gr | 80% | 32,126 psi | 50% | 2579 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 43,250 psi | 68% | 2736 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,648 psi | 51% | 2608 fps | 97.9% |
| Ramshot Grand | <<locked>> | 80% | 49,458 psi | 78% | 2959 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 80% | 44,599 psi | 70% | 2825 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,385 psi | 46% | 1808 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,206 psi | 66% | 2867 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,856 psi | 61% | 2759 fps | 96.7% |
| Rottweil R 905 | <<locked>> | 80% | 53,809 psi | 84% | 2979 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 44,991 psi | 71% | 2835 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,461 psi | 84% | 2976 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,572 psi | 75% | 2825 fps | 100% |
| Vihtavuori N170 | <<locked>> | 84% | 47,007 psi | 74% | 2844 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 54,056 psi | 85% | 2949 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,185 psi | 83% | 3028 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 80% | 44,802 psi | 70% | 2844 fps | 98.9% |
| Vihtavuori N568 | <<locked>> | 80% | 39,856 psi | 62% | 2776 fps | 96.5% |
| Vihtavuori N570 | 86.6 gr | 84% | 44,005 psi | 69% | 2900 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,472 psi | 78% | 2949 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,183 psi | 79% | 2884 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 52 powders for 7 mm KM Katzmaier loaded with the .284 | 160gr | Alaska Bullet Works Kodiak SP SPBC. ADI AR 2218 delivers the highest muzzle velocity at 3,202 fps; across all powders the maximum-charge window runs from 1,972 fps to 3,202 fps. Accurate 8700 gives the best case fill at 100 %, and 52 of the 52 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 160.0 gr projectile in 0.284" calls for a 1:11.0 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, IMR 8133 Enduron rank at the top here: for 7 mm KM Katzmaier with the .284 | 160gr | Alaska Bullet Works Kodiak SP SPBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon 50BMG, Hodgdon US 869, Vihtavuori 24N41 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.