Embattled Senator Bridget McKenzie joined Wangaratta Clay Target Club as a member just four days before her office sent a list to Sport Australia recommending projects it wanted to share in the federal government's $100 million sport grants "slush fund".

A detailed timeline of the controversial Community Sport Infrastructure Program decision-making process has revealed Sport Australia, which oversaw the program, had finalised its list of priority projects on January 25, 2019 - the same day Senator McKenzie, then sport minister, visited the club.

Nationals deputy leader Bridget McKenzie officially approved a grant for a shooting club just four days after becoming a member. Credit:Alex Ellinghausen

The federal Nationals deputy leader is standing firm amid pressure to quit over her handling over the alleged sports rort scandal as an inquiry probes whether or not she breached ministerial standards.

Evidence gathered during an audit of the scheme found just 20 minutes after Sport Australia lodged its recommendation with the Department of Health in January last year, it withdrew the list because Senator McKenzie's office had advised "there may be a late change to the submission".