Muir a 'Lot' in this country is a numbered item in an auction!
In fact the word 'batch' is used in the term 'batch production' which pertains to a manufacturing process in producing 'a lot' of the same items made from different components from a short uninterrupted manufacturing run. e.g. Until the production line is stopped to re-calibrate the powder measure, seating depth etc. Then the process is re-started creating a new batch.
However I'm happy calling it 'batch' or 'lot' - I think we all understand!