Load Specifications
Load data in caliber 7 mm KM Katzmaier with .284 | 140gr | Barnes X S bullet and 50 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 84% | 56,449 psi | 88% | 3114 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 51,242 psi | 80% | 3114 fps | 96.5% |
| Accurate MAGPRO | <<locked>> | 82% | 54,940 psi | 86% | 3212 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 82% | 56,115 psi | 88% | 3186 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,926 psi | 86% | 3202 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 92% | 54,259 psi | 85% | 3182 fps | 99.8% |
| ADI AR 2218 | <<locked>> | 96% | 55,071 psi | 86% | 3304 fps | 98.1% |
| ADI AR 2225 | <<locked>> | 94% | 54,099 psi | 85% | 3215 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 56,376 psi | 88% | 3182 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 56,376 psi | 88% | 3182 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,854 psi | 88% | 3176 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,811 psi | 87% | 3202 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 54,389 psi | 85% | 3114 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,810 psi | 86% | 3189 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 57,464 psi | 90% | 3287 fps | 98.3% |
| Alliant Reloder-50 | <<locked>> | 96% | 54,288 psi | 85% | 3219 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,027 psi | 86% | 3150 fps | 98% |
| Bofors RP15 | <<locked>> | 86% | 55,506 psi | 87% | 3199 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,158 psi | 86% | 3209 fps | 99.8% |
| Bofors RP5 | <<locked>> | 84% | 55,811 psi | 87% | 3202 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,608 psi | 87% | 3202 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 57,580 psi | 90% | 3192 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,478 psi | 89% | 3176 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 88% | 53,983 psi | 85% | 3278 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,116 psi | 60% | 2093 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 57,508 psi | 90% | 3166 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 86% | 57,450 psi | 90% | 3251 fps | 99.8% |
| IMR 8133 Enduron | <<locked>> | 98% | 57,392 psi | 90% | 3261 fps | 99.9% |
| Lovex S071 | <<locked>> | 88% | 54,998 psi | 86% | 3091 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,071 psi | 86% | 3225 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,130 psi | 88% | 3222 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,998 psi | 86% | 3212 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 86% | 53,824 psi | 84% | 3140 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,117 psi | 61% | 2139 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 54,969 psi | 86% | 3264 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 54,766 psi | 86% | 3228 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 82% | 56,463 psi | 88% | 3153 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 82% | 55,941 psi | 88% | 3173 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 53,534 psi | 84% | 3133 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,564 psi | 87% | 3169 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,449 psi | 88% | 3143 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,391 psi | 88% | 3123 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,072 psi | 88% | 3146 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 82% | 56,565 psi | 89% | 3150 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,288 psi | 87% | 3222 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 88% | 57,130 psi | 90% | 3222 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 90% | 54,969 psi | 86% | 3228 fps | 98.9% |
| Vihtavuori N570 | <<locked>> | 92% | 56,333 psi | 88% | 3297 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 84% | 55,042 psi | 86% | 3209 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,956 psi | 88% | 3133 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% | 49,792 psi | 78% | 3005 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 47,848 psi | 75% | 3048 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 80% | 51,358 psi | 80% | 3146 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 80% | 52,533 psi | 82% | 3127 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 80% | 48,022 psi | 75% | 3074 fps | 98.7% |
| ADI AR 2217 | <<locked>> | 80% | 36,564 psi | 57% | 2805 fps | 96% |
| ADI AR 2218 | 96.9 gr | 92% | 47,863 psi | 75% | 3153 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 80% | 34,200 psi | 54% | 2785 fps | 98.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 53,055 psi | 83% | 3127 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 53,055 psi | 83% | 3127 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,562 psi | 82% | 3120 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,081 psi | 77% | 3081 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,877 psi | 75% | 3005 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,061 psi | 66% | 2956 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 46,311 psi | 73% | 3074 fps | 95.6% |
| Alliant Reloder-50 | <<locked>> | 92% | 47,123 psi | 74% | 3077 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,600 psi | 71% | 2966 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 45,890 psi | 72% | 3015 fps | 99.1% |
| Bofors RP30 | <<locked>> | 80% | 39,900 psi | 63% | 2900 fps | 97.3% |
| Bofors RP5 | <<locked>> | 80% | 49,081 psi | 77% | 3081 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 80% | 39,566 psi | 62% | 2887 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 80% | 50,357 psi | 79% | 3064 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,545 psi | 78% | 3048 fps | 98.5% |
| Hodgdon Retumbo | 79.5 gr | 80% | 41,220 psi | 65% | 3015 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,660 psi | 45% | 1877 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,778 psi | 80% | 3045 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 80% | 46,934 psi | 74% | 3061 fps | 98.6% |
| IMR 8133 Enduron | <<locked>> | 84% | 36,448 psi | 57% | 2831 fps | 95.9% |
| Lovex S071 | <<locked>> | 80% | 43,381 psi | 68% | 2881 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 32,532 psi | 51% | 2743 fps | 96.6% |
| Norma MRP | <<locked>> | 80% | 52,431 psi | 82% | 3159 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,630 psi | 75% | 3077 fps | 99% |
| Ramshot Magnum | <<locked>> | 80% | 43,598 psi | 68% | 2949 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,602 psi | 46% | 1923 fps | 100% |
| ReloadSwiss RS 76 | 85.1 gr | 80% | 41,031 psi | 64% | 2995 fps | 99.7% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,305 psi | 60% | 2884 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 53,127 psi | 83% | 3094 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 80% | 52,562 psi | 82% | 3114 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 50,140 psi | 79% | 3071 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,199 psi | 82% | 3110 fps | 99.8% |
| Somchem S385 | <<locked>> | 80% | 53,011 psi | 83% | 3084 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,688 psi | 73% | 2953 fps | 99.6% |
| Vihtavuori N170 | <<locked>> | 88% | 52,649 psi | 83% | 3087 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 53,084 psi | 83% | 3094 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,677 psi | 81% | 3153 fps | 99% |
| Vihtavuori N565 | <<locked>> | 80% | 44,150 psi | 69% | 2972 fps | 97.7% |
| Vihtavuori N568 | <<locked>> | 82% | 41,843 psi | 66% | 2959 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 88% | 49,110 psi | 77% | 3156 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,572 psi | 75% | 3091 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,139 psi | 77% | 3015 fps | 99.6% |
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 50 powders for 7 mm KM Katzmaier loaded with the .284 | 140gr | Barnes X S. ADI AR 2218 delivers the highest muzzle velocity at 3,304 fps; across all powders the maximum-charge window runs from 2,093 fps to 3,304 fps. Accurate 8700 gives the best case fill at 100 %, and 50 of the 50 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 140.0 gr projectile in 0.284" calls for a 1:10.5 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 | 140gr | Barnes X S 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.