Complex sentence: Cartridges loaded at or above the SAAMI pressure, or slightly oversized cases which fire slightly out of battery are often considered to be the cause of these failures, which are commonly referred to as "kaBooms" or "kB!" for short.
Split into simpler sentences: Cartridges loaded at or above the SAAMI pressure, or slightly oversized cases which fire slightly out of battery are often considered to be the cause of these failures. These failures are commonly referred to as "kaBooms" or "kB!" for short.