A Queensland woman allegedly busted trying to smuggle a bullet stashed in her hair into a prison could face up to two years in jail.

The 38-year-old was visiting an inmate at the Woodford Correctional Centre on October 27 when she was allegedly caught with what was believed to be a live .22 round.

A bullet was alleged smuggled into Woodford Correctional Centre by a visitor.

She was charged with possession of an explosive and introducing a prohibited item into a correctional centre, and was due to appear in Caboolture Magistrates Court on Thursday.

A Queensland Corrective Services source had told Fairfax Media there was speculation within the jail there could have been a makeshift gun inside but a spokesman for the organisation said no such weapon was found.