Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 150gr | Prvi Partizan HP BT bullet and 51 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Hodgdon Retumbo and ReloadSwiss RS 76.
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% | 55,245 psi | 87% | 3018 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 50,923 psi | 80% | 3038 fps | 97.1% |
| Accurate MAGPRO | <<locked>> | 82% | 54,215 psi | 85% | 3123 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 82% | 55,840 psi | 88% | 3107 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,824 psi | 86% | 3123 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 92% | 54,215 psi | 85% | 3104 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 54,911 psi | 86% | 3228 fps | 98.7% |
| ADI AR 2225 | <<locked>> | 94% | 53,954 psi | 85% | 3130 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 56,159 psi | 88% | 3104 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 56,159 psi | 88% | 3104 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,593 psi | 87% | 3094 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,448 psi | 87% | 3120 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 57,421 psi | 90% | 3077 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,549 psi | 85% | 3100 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 57,029 psi | 89% | 3205 fps | 98.7% |
| Alliant Reloder-50 | <<locked>> | 98% | 57,261 psi | 90% | 3196 fps | 98.4% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,100 psi | 86% | 3081 fps | 98.5% |
| Bofors RP15 | <<locked>> | 86% | 54,882 psi | 86% | 3110 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,346 psi | 85% | 3120 fps | 99.9% |
| Bofors RP5 | <<locked>> | 84% | 55,448 psi | 87% | 3120 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,622 psi | 87% | 3127 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 57,232 psi | 90% | 3110 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,275 psi | 88% | 3097 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 88% | 53,969 psi | 85% | 3189 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,985 psi | 60% | 2031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 57,261 psi | 90% | 3087 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 86% | 57,232 psi | 90% | 3169 fps | 100% |
| IMR 8133 Enduron | <<locked>> | 98% | 56,666 psi | 89% | 3169 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 57,290 psi | 90% | 3048 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,389 psi | 85% | 3133 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,506 psi | 87% | 3130 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,781 psi | 86% | 3130 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 57,421 psi | 90% | 3117 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,943 psi | 61% | 2077 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 54,766 psi | 86% | 3173 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 54,027 psi | 85% | 3140 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 82% | 56,144 psi | 88% | 3074 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 55,317 psi | 87% | 3084 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,765 psi | 83% | 3051 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 54,955 psi | 86% | 3084 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 57,638 psi | 90% | 3064 fps | 99.8% |
| Somchem S385 | <<locked>> | 82% | 55,782 psi | 87% | 3054 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 55,767 psi | 87% | 3041 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,332 psi | 87% | 3068 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 55,419 psi | 87% | 3054 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,795 psi | 86% | 3133 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 88% | 56,333 psi | 88% | 3133 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 54,433 psi | 85% | 3143 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 92% | 55,941 psi | 88% | 3212 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 54,592 psi | 86% | 3114 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,593 psi | 87% | 3051 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% | 48,225 psi | 76% | 2904 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 43,772 psi | 69% | 2900 fps | 95% |
| Accurate MAGPRO | <<locked>> | 80% | 50,488 psi | 79% | 3054 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 80% | 52,170 psi | 82% | 3045 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 47,500 psi | 74% | 2992 fps | 99.1% |
| ADI AR 2217 | <<locked>> | 80% | 35,520 psi | 56% | 2717 fps | 96.4% |
| ADI AR 2218 | 95.2 gr | 90% | 43,772 psi | 69% | 2992 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 32,880 psi | 52% | 2687 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 52,562 psi | 82% | 3041 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 52,562 psi | 82% | 3041 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,069 psi | 82% | 3035 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,254 psi | 76% | 2992 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,137 psi | 74% | 2917 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,162 psi | 65% | 2861 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 45,426 psi | 71% | 2986 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 92% | 45,803 psi | 72% | 2979 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,223 psi | 71% | 2890 fps | 96.4% |
| Bofors RP15 | <<locked>> | 80% | 44,962 psi | 70% | 2927 fps | 99.3% |
| Bofors RP30 | <<locked>> | 80% | 38,566 psi | 60% | 2799 fps | 97.4% |
| Bofors RP5 | <<locked>> | 80% | 48,254 psi | 76% | 2992 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 80% | 38,769 psi | 61% | 2799 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 80% | 49,980 psi | 78% | 2986 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,979 psi | 77% | 2966 fps | 98.9% |
| Hodgdon Retumbo | 79.9 gr | 80% | 40,321 psi | 63% | 2920 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,529 psi | 45% | 1821 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,314 psi | 79% | 2966 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 80% | 46,340 psi | 73% | 2972 fps | 98.9% |
| IMR 8133 Enduron | <<locked>> | 84% | 35,041 psi | 55% | 2726 fps | 96% |
| Lovex S071 | <<locked>> | 80% | 41,597 psi | 65% | 2779 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 30,879 psi | 48% | 2625 fps | 96.4% |
| Norma MRP | <<locked>> | 80% | 51,663 psi | 81% | 3064 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,021 psi | 74% | 2992 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 80% | 42,540 psi | 67% | 2858 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,312 psi | 46% | 1864 fps | 100% |
| ReloadSwiss RS 76 | 85.5 gr | 80% | 39,958 psi | 63% | 2894 fps | 99.8% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 36,840 psi | 58% | 2776 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 52,707 psi | 83% | 3015 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 80% | 51,866 psi | 81% | 3028 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 46,006 psi | 72% | 2923 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,532 psi | 81% | 3022 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 53,925 psi | 85% | 3002 fps | 99.5% |
| Somchem S385 | <<locked>> | 80% | 52,069 psi | 82% | 2995 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,803 psi | 72% | 2871 fps | 99.7% |
| Vihtavuori N170 | <<locked>> | 86% | 48,385 psi | 76% | 2940 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 80% | 51,822 psi | 81% | 2995 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,068 psi | 80% | 3068 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 80% | 42,772 psi | 67% | 2874 fps | 97.9% |
| Vihtavuori N568 | <<locked>> | 80% | 37,927 psi | 59% | 2799 fps | 95% |
| Vihtavuori N570 | <<locked>> | 86% | 45,020 psi | 71% | 2995 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,862 psi | 73% | 2989 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,341 psi | 76% | 2927 fps | 99.7% |
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 51 powders for 7 mm KM Katzmaier loaded with the .284 | 150gr | Prvi Partizan HP BT. ADI AR 2218 delivers the highest muzzle velocity at 3,228 fps; across all powders the maximum-charge window runs from 2,031 fps to 3,228 fps. Accurate 8700 gives the best case fill at 100 %, and 51 of the 51 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 150.0 gr projectile in 0.284" calls for a 1:11.5 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, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 7 mm KM Katzmaier with the .284 | 150gr | Prvi Partizan HP BT 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.