Why won't model B 80 eject low base shells?

Model B 80 may not eject low base shells due to insufficient energy generated during the firing cycle. Low base shells typically have less powder, which can lead to inadequate force for reliable ejection. Additionally, the extractor and ejector mechanisms might not be optimized for handling lighter loads, causing failures to eject. Ensuring the firearm is clean and well-maintained can also impact its performance with different shell types.