Short, fat, round endomorphs can bench alot. Next time you see one in the gym watch him....
They have short arms which limits there ROM, and they also have big fat chests, with round large ribcages underneath which means bar can only be lowered so much. Some extreme fatty's can look like they're doing a full rep, but compared to an ectomorph, its only the top 3rd of the rep range.
They can bench alot, but would I choose to look like them....er...No!!