Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 160gr | Peregrine Glider GRM 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, Vihtavuori N570 and Alliant Reloder-33.
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>> | 86% | 57,029 psi | 89% | 2969 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 48,820 psi | 77% | 2936 fps | 97% |
| Accurate MAGPRO | <<locked>> | 84% | 56,376 psi | 88% | 3087 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 54,534 psi | 85% | 3005 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 57,188 psi | 90% | 3084 fps | 100% |
| ADI AR 2217 | <<locked>> | 94% | 56,449 psi | 88% | 3068 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 57,101 psi | 89% | 3199 fps | 99.3% |
| ADI AR 2225 | <<locked>> | 96% | 55,927 psi | 88% | 3084 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 54,708 psi | 86% | 3002 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 54,128 psi | 85% | 2992 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 57,551 psi | 90% | 3077 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 55,854 psi | 88% | 2976 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 56,652 psi | 89% | 3058 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 56,579 psi | 89% | 3064 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 54,955 psi | 86% | 3100 fps | 98.7% |
| Alliant Reloder-50 | <<locked>> | 98% | 54,752 psi | 86% | 3091 fps | 98.3% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 57,580 psi | 90% | 3045 fps | 99.1% |
| Bofors RP15 | <<locked>> | 88% | 56,942 psi | 89% | 3064 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 56,275 psi | 88% | 3077 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 57,551 psi | 90% | 3077 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 54,041 psi | 85% | 3025 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 55,811 psi | 87% | 3012 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 54,839 psi | 86% | 2995 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 90% | 56,188 psi | 88% | 3150 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,826 psi | 59% | 1955 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,028 psi | 88% | 2989 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 86% | 55,753 psi | 87% | 3068 fps | 100% |
| IMR 8133 Enduron | <<locked>> | 98% | 54,781 psi | 86% | 3068 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 55,405 psi | 87% | 2946 fps | 100% |
| Norma 217 | <<locked>> | 98% | 56,202 psi | 88% | 3087 fps | 100% |
| Norma MRP | <<locked>> | 82% | 53,795 psi | 84% | 3028 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 57,276 psi | 90% | 3094 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 55,434 psi | 87% | 3012 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,798 psi | 61% | 2001 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 57,058 psi | 89% | 3136 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 56,043 psi | 88% | 3104 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 82% | 54,853 psi | 86% | 2976 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 84% | 57,667 psi | 90% | 3045 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 50,676 psi | 79% | 2949 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 57,290 psi | 90% | 3041 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,217 psi | 88% | 2966 fps | 99.8% |
| Somchem S385 | <<locked>> | 82% | 54,215 psi | 85% | 2953 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 54,302 psi | 85% | 2943 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 57,435 psi | 90% | 3031 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 84% | 57,363 psi | 90% | 3002 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 57,174 psi | 90% | 3097 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 88% | 54,491 psi | 85% | 3031 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 92% | 56,521 psi | 89% | 3107 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 92% | 53,925 psi | 85% | 3107 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 56,681 psi | 89% | 3068 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 54,128 psi | 85% | 2953 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% | 46,383 psi | 73% | 2802 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 45,194 psi | 71% | 2867 fps | 96% |
| Accurate MAGPRO | <<locked>> | 80% | 48,834 psi | 77% | 2956 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 80% | 50,908 psi | 80% | 2946 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 46,282 psi | 73% | 2894 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 80% | 34,214 psi | 54% | 2621 fps | 96.4% |
| ADI AR 2218 | 90.8 gr | 90% | 42,235 psi | 66% | 2894 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 31,546 psi | 49% | 2592 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 51,155 psi | 80% | 2943 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,647 psi | 79% | 2936 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,920 psi | 74% | 2894 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,585 psi | 71% | 2815 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,726 psi | 62% | 2762 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,330 psi | 82% | 2999 fps | 100% |
| Alliant Reloder-33 | 90.4 gr | 88% | 43,598 psi | 68% | 2884 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 92% | 43,410 psi | 68% | 2867 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,150 psi | 69% | 2802 fps | 96.5% |
| Bofors RP15 | <<locked>> | 80% | 43,540 psi | 68% | 2828 fps | 99.4% |
| Bofors RP30 | <<locked>> | 80% | 36,912 psi | 58% | 2700 fps | 97.4% |
| Bofors RP5 | <<locked>> | 80% | 46,920 psi | 74% | 2894 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 37,405 psi | 59% | 2703 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 80% | 48,704 psi | 76% | 2890 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,805 psi | 75% | 2874 fps | 99% |
| Hodgdon Retumbo | <<locked>> | 80% | 38,928 psi | 61% | 2825 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,355 psi | 44% | 1752 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,182 psi | 77% | 2871 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 80% | 45,034 psi | 71% | 2877 fps | 99% |
| IMR 8133 Enduron | <<locked>> | 84% | 33,460 psi | 52% | 2625 fps | 95.9% |
| Lovex S071 | <<locked>> | 80% | 39,871 psi | 62% | 2677 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 29,254 psi | 46% | 2523 fps | 96.2% |
| Norma MRP | <<locked>> | 80% | 50,038 psi | 78% | 2966 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 45,571 psi | 71% | 2890 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 80% | 40,828 psi | 64% | 2756 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,138 psi | 46% | 1791 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,334 psi | 60% | 2795 fps | 99.8% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 35,157 psi | 55% | 2677 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 51,474 psi | 81% | 2917 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 80% | 50,473 psi | 79% | 2930 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 44,063 psi | 69% | 2822 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,125 psi | 79% | 2923 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 52,547 psi | 82% | 2907 fps | 99.6% |
| Somchem S385 | <<locked>> | 80% | 50,720 psi | 79% | 2897 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 44,338 psi | 69% | 2772 fps | 99.7% |
| Vihtavuori N170 | <<locked>> | 86% | 46,731 psi | 73% | 2841 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 80% | 50,314 psi | 79% | 2897 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,545 psi | 78% | 2966 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 80% | 41,176 psi | 65% | 2776 fps | 97.9% |
| Vihtavuori N568 | <<locked>> | 82% | 39,059 psi | 61% | 2766 fps | 96% |
| Vihtavuori N570 | 85 gr | 86% | 43,250 psi | 68% | 2894 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 44,933 psi | 70% | 2887 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,978 psi | 74% | 2831 fps | 99.8% |
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 51 powders for 7 mm KM Katzmaier loaded with the .284 | 160gr | Peregrine Glider GRM. ADI AR 2218 delivers the highest muzzle velocity at 3,199 fps; across all powders the maximum-charge window runs from 1,955 fps to 3,199 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 59–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:8.0 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, Alliant Reloder-33 rank at the top here: for 7 mm KM Katzmaier with the .284 | 160gr | Peregrine Glider GRM 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.