Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 150gr | Peregrine VLR-4 bullet and 51 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ADI AR 2218 and ReloadSwiss RS 80.
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% | 55,651 psi | 87% | 3031 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 54,824 psi | 86% | 3140 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 84% | 56,942 psi | 89% | 3127 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,724 psi | 87% | 3143 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 94% | 54,810 psi | 86% | 3120 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 55,390 psi | 87% | 3241 fps | 98.7% |
| ADI AR 2225 | <<locked>> | 96% | 54,085 psi | 85% | 3140 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 57,043 psi | 89% | 3123 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,434 psi | 88% | 3114 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,130 psi | 88% | 3136 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,317 psi | 85% | 3038 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 54,984 psi | 86% | 3114 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,708 psi | 86% | 3120 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 57,421 psi | 90% | 3219 fps | 98.7% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 57,029 psi | 89% | 3202 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,173 psi | 88% | 3100 fps | 98.6% |
| Bofors RP15 | <<locked>> | 88% | 55,535 psi | 87% | 3127 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 54,737 psi | 86% | 3130 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 56,130 psi | 88% | 3136 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,246 psi | 88% | 3140 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 54,389 psi | 85% | 3068 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,319 psi | 90% | 3117 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,000 psi | 89% | 3025 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,259 psi | 85% | 3205 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,724 psi | 59% | 2018 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,810 psi | 86% | 3048 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 86% | 54,099 psi | 85% | 3123 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,884 psi | 89% | 3179 fps | 100% |
| Lovex S071 | <<locked>> | 92% | 57,464 psi | 90% | 3058 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,273 psi | 85% | 3140 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,304 psi | 88% | 3150 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,535 psi | 87% | 3150 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 53,838 psi | 84% | 3068 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,653 psi | 61% | 2064 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 55,027 psi | 86% | 3186 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 54,288 psi | 85% | 3150 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 84% | 57,305 psi | 90% | 3094 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 84% | 56,231 psi | 88% | 3107 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 49,269 psi | 77% | 2992 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,854 psi | 88% | 3100 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,027 psi | 86% | 3022 fps | 99.5% |
| Somchem S385 | <<locked>> | 84% | 56,449 psi | 88% | 3071 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,681 psi | 89% | 3058 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 55,927 psi | 88% | 3084 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 84% | 55,927 psi | 88% | 3068 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,695 psi | 87% | 3153 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 90% | 56,768 psi | 89% | 3146 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 92% | 54,766 psi | 86% | 3156 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 94% | 56,144 psi | 88% | 3222 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,766 psi | 86% | 3127 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,565 psi | 89% | 3071 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% | 45,223 psi | 71% | 2854 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 47,384 psi | 74% | 3002 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 80% | 49,734 psi | 78% | 3005 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 80% | 44,875 psi | 70% | 2943 fps | 98.5% |
| ADI AR 2217 | <<locked>> | 80% | 33,170 psi | 52% | 2657 fps | 95.1% |
| ADI AR 2218 | 94.5 gr | 92% | 44,034 psi | 69% | 3002 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 30,487 psi | 48% | 2621 fps | 97.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 49,980 psi | 78% | 3002 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,516 psi | 78% | 2995 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,527 psi | 71% | 2946 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,266 psi | 69% | 2874 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,522 psi | 60% | 2815 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,807 psi | 80% | 3058 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 45,513 psi | 71% | 2992 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 94% | 45,295 psi | 71% | 2979 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,062 psi | 67% | 2848 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 42,279 psi | 66% | 2874 fps | 98.8% |
| Bofors RP30 | <<locked>> | 80% | 35,781 psi | 56% | 2740 fps | 96.3% |
| Bofors RP5 | <<locked>> | 80% | 45,527 psi | 71% | 2946 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 80% | 36,187 psi | 57% | 2743 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 80% | 47,340 psi | 74% | 2940 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,499 psi | 73% | 2923 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,476 psi | 84% | 2972 fps | 100% |
| Hodgdon Retumbo | 77.6 gr | 80% | 37,565 psi | 59% | 2861 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,297 psi | 44% | 1808 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,182 psi | 76% | 2930 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 80% | 43,627 psi | 68% | 2923 fps | 98.3% |
| IMR 8133 Enduron | <<locked>> | 86% | 34,751 psi | 54% | 2726 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 38,783 psi | 61% | 2723 fps | 99.6% |
| Norma 217 | <<locked>> | 82% | 30,284 psi | 47% | 2618 fps | 96% |
| Norma MRP | <<locked>> | 80% | 48,588 psi | 76% | 3018 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 44,092 psi | 69% | 2940 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 80% | 39,610 psi | 62% | 2802 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,037 psi | 46% | 1850 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 37,057 psi | 58% | 2835 fps | 99.3% |
| ReloadSwiss RS 80 | 87.9 gr | 84% | 39,653 psi | 62% | 2858 fps | 96.2% |
| Rottweil R 904 | <<locked>> | 80% | 50,241 psi | 79% | 2976 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 80% | 49,139 psi | 77% | 2982 fps | 99.8% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 45,803 psi | 72% | 2927 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,791 psi | 76% | 2979 fps | 99.8% |
| Somchem S361 | <<locked>> | 80% | 51,329 psi | 80% | 2963 fps | 99.2% |
| Somchem S385 | <<locked>> | 80% | 49,371 psi | 77% | 2953 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 43,265 psi | 68% | 2825 fps | 99.4% |
| Vihtavuori N170 | <<locked>> | 88% | 48,733 psi | 76% | 2949 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 48,921 psi | 77% | 2956 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,167 psi | 75% | 3018 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 80% | 39,972 psi | 63% | 2822 fps | 97% |
| Vihtavuori N568 | <<locked>> | 84% | 40,770 psi | 64% | 2874 fps | 96% |
| Vihtavuori N570 | <<locked>> | 88% | 45,005 psi | 71% | 3005 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,308 psi | 68% | 2940 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,614 psi | 71% | 2881 fps | 99.4% |
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 | Peregrine VLR-4. ADI AR 2218 delivers the highest muzzle velocity at 3,241 fps; across all powders the maximum-charge window runs from 2,018 fps to 3,241 fps. Alliant Reloder-50 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 150.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-50, Hodgdon TrailBoss, IMR 8133 Enduron 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. Hodgdon Retumbo, ADI AR 2218, ReloadSwiss RS 80 rank at the top here: for 7 mm KM Katzmaier with the .284 | 150gr | Peregrine VLR-4 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.