My friend and I are working on a project requiring for us to propel a syringe forward in a small container with significant force. We are debating whether to use an elastic band wrapped around the syringe (in the form of a small hand slingshot) or a flat piece of spring steel that upon activation will revert into its original, curved shape, pushing out on the syringe.
Is there such a type of spring steel that will be able to do this effectively and with a large force? If so, are there any downsides to using it as opposed to an elastic band? The goal is to make a product viable on the market for long-term, one-shot use.