I used to work medical standbys for the Detroit Catholic Archdioces and got pretty friendly with the security team (99% retired/ active Detroit PD) and it seemed they carried whatever they were active with. The old detectives carried .38 snubbys. The more recently retired guys carried G22 or G23. A couple scaled down to 9mm. And then there was 1 guy who was retired DPD and current firearms instructor for Wayne State University PD, he carried a Keltec P3AT. These guys had a couple roles. They were protection for the Archbishop/ Cardinal, security for his residence which was on cathedral grounds, and security during services no matter who was on the pulpit. They were all good guys. I kinda miss that gig.