You're going to be a little undergunned with a single action .22 rimfire. My daily carry piece is a Polish P-64 9X18 with Hornady 100 grain hollowpoint handloads. It's 6+1 with one spare magazine, and if I've got my pants on, it's in a Remora IWB holster. If I still went to church that carry routine wouldn't change. From a seated position in the pews, especially if you wear a suit or another cover garment of some type, you might want to consider a shoulder rig for quicker access without having to stand up or draw attention to yourself by making any quick movements while drawing. The video of the recent church shooting seems to show at least one defender getting killed while attempting to draw his weapon.
Jerry


Ignorance can be fixed. Stupid is forever!