Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 175gr | Alaska Bullet Works Kodiak PP SPBC bullet and 39 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>> | 82% | 56,971 psi | 89% | 2848 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 54,186 psi | 85% | 2920 fps | 99% |
| ADI AR 2213 | <<locked>> | 82% | 56,768 psi | 89% | 2959 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 57,058 psi | 89% | 2953 fps | 100% |
| ADI AR 2218 | <<locked>> | 92% | 53,925 psi | 85% | 3031 fps | 99.6% |
| ADI AR 2225 | <<locked>> | 92% | 57,276 psi | 90% | 2976 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 57,406 psi | 90% | 2953 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 55,970 psi | 88% | 2851 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 57,087 psi | 89% | 2936 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 56,014 psi | 88% | 3002 fps | 99.5% |
| Alliant Reloder-50 | <<locked>> | 94% | 56,652 psi | 89% | 3005 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 56,550 psi | 89% | 2923 fps | 99.6% |
| Bofors RP15 | <<locked>> | 84% | 57,000 psi | 89% | 2946 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 57,159 psi | 90% | 2969 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 57,406 psi | 90% | 2953 fps | 100% |
| Hodgdon H1000 | <<locked>> | 86% | 54,259 psi | 85% | 2910 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 57,493 psi | 90% | 3038 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,247 psi | 60% | 1896 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 55,680 psi | 87% | 2946 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 57,363 psi | 90% | 2884 fps | 97.6% |
| IMR 8133 Enduron | <<locked>> | 94% | 56,231 psi | 88% | 2969 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 55,303 psi | 87% | 2881 fps | 96.3% |
| Lovex S071 | <<locked>> | 86% | 55,854 psi | 88% | 2835 fps | 100% |
| Norma 217 | <<locked>> | 92% | 54,143 psi | 85% | 2930 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 57,392 psi | 90% | 2972 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 57,479 psi | 90% | 3025 fps | 96.5% |
| Ramshot Magnum | <<locked>> | 84% | 55,666 psi | 87% | 2894 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,291 psi | 62% | 1939 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 53,809 psi | 84% | 2956 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 56,956 psi | 89% | 2999 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 55,303 psi | 87% | 2881 fps | 96.3% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 55,724 psi | 87% | 2927 fps | 98.9% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 52,895 psi | 83% | 2897 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 84% | 57,624 psi | 90% | 2874 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 57,406 psi | 90% | 2927 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 84% | 54,998 psi | 86% | 2920 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 57,217 psi | 90% | 3002 fps | 100% |
| Vihtavuori N570 | <<locked>> | 88% | 55,158 psi | 86% | 3012 fps | 99.2% |
| Winchester Supreme 780 | <<locked>> | 82% | 57,188 psi | 90% | 2884 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% | 53,447 psi | 84% | 2799 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 40,350 psi | 63% | 2664 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 80% | 53,011 psi | 83% | 2900 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 40,103 psi | 63% | 2657 fps | 99.2% |
| ADI AR 2218 | 88.4 gr | 84% | 39,900 psi | 63% | 2740 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 80% | 37,492 psi | 59% | 2635 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 53,708 psi | 84% | 2897 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 52,359 psi | 82% | 2802 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 46,586 psi | 73% | 2772 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 38,653 psi | 61% | 2664 fps | 95.5% |
| Alliant Reloder-50 | 89.8 gr | 84% | 39,233 psi | 61% | 2667 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 49,777 psi | 78% | 2808 fps | 98.8% |
| Bofors RP15 | <<locked>> | 80% | 50,082 psi | 78% | 2835 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 43,642 psi | 68% | 2733 fps | 99.6% |
| Bofors RP5 | <<locked>> | 80% | 53,708 psi | 84% | 2897 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 43,700 psi | 68% | 2730 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 80% | 46,253 psi | 72% | 2854 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,732 psi | 45% | 1696 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 51,938 psi | 81% | 2887 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 82% | 47,355 psi | 74% | 2710 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 80% | 34,925 psi | 55% | 2556 fps | 97.6% |
| Lovex D100 | <<locked>> | 88% | 51,561 psi | 81% | 2818 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 46,224 psi | 72% | 2684 fps | 100% |
| Norma 217 | <<locked>> | 80% | 35,795 psi | 56% | 2585 fps | 99.4% |
| Ramshot Grand | <<locked>> | 80% | 53,243 psi | 83% | 2910 fps | 100% |
| Ramshot LRT | <<locked>> | 92% | 53,476 psi | 84% | 2956 fps | 95.5% |
| Ramshot Magnum | <<locked>> | 80% | 48,196 psi | 76% | 2779 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,704 psi | 47% | 1739 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 46,253 psi | 72% | 2831 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 42,380 psi | 66% | 2736 fps | 98.6% |
| Shooters World 50 BMG | <<locked>> | 88% | 51,561 psi | 81% | 2818 fps | 95.3% |
| SNPE Vectan SP 13 | <<locked>> | 88% | 39,639 psi | 62% | 2625 fps | 95% |
| Vihtavuori 20N29 | <<locked>> | 96% | 45,919 psi | 72% | 2769 fps | 95.3% |
| Vihtavuori N165 | <<locked>> | 80% | 50,662 psi | 79% | 2772 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 43,801 psi | 69% | 2684 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 80% | 48,008 psi | 75% | 2802 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 80% | 43,076 psi | 68% | 2746 fps | 98.3% |
| Vihtavuori N570 | 82.5 gr | 80% | 41,292 psi | 65% | 2740 fps | 96% |
| Winchester Supreme 780 | <<locked>> | 80% | 53,432 psi | 84% | 2828 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 42 powders for 7 mm KM Katzmaier loaded with the .284 | 175gr | Alaska Bullet Works Kodiak PP SPBC. Hodgdon Retumbo delivers the highest muzzle velocity at 3,038 fps; across all powders the maximum-charge window runs from 1,896 fps to 3,038 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 42 of the 42 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 175.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori 20N29 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 | 175gr | Alaska Bullet Works Kodiak PP SPBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon 50BMG 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.