Hi I would say no - they are different A one-off deal is one that is unusual - not something that would usually come your way - but you were lucky and it came your way A one-shot deal is one where you only get one chance - if you get it right then you will succeed The first metaphor is from manufacturing - a one-off is something that is only made one time The second metaphor is probably from gun-fighting (or maybe golf) - a situation where you have only one chance, otherwise you have failed Hope this helps, Dave
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