Nominal ballistics are 146 grains at 650 fps
Previous experience of this problem had resulted in the need for hospital treatment so when this injury reoccurred recently, it was a cause of some concern

In 2015, PHE declared that the current best estimate [shows] using e-cigarettes is around 95% safer than smoking.[ii] In 2018, PHE reiterated this claim, finding vaping is at least 95% less harmful than smoking.[iii] A 2016 report from the Tobacco Advisory Group of the Royal College of Physicians concluded that the hazards from e-cigarettes were unlikely to exceed 5% of the harm from smoking tobacco.[iv] In 2018, the National Academies of Sciences, Engineering, and Medicine released a report that found substantial evidence that completely switching from regular use of combustible cigarettes to e-cigarettes results in reduced short-term adverse health outcomes in several organ systems.[v] Most recently, in June 2019, the American Cancer Society (ACS) noted that e-cigarette use is likely to be significantly less harmful for adults than smoking regular cigarettes.[vi] The reduced harm of e-cigarettes is due to these products containing significantly less harmful ingredients than tobacco cigarettes

That's because the researchers from the University of Bristol who conducted the study concluded that it's the cigarette smoking of a maternal grandmother while she was pregnant that was linked with autism two generations down the line
This pressure can damage the delicate nerve cells responsible for smell detection