First, it would help if you describe what kind of cover garment you're wearing when you carry.
* Polo Shirt
* Jersey Shirt
* Button front (Dress) shirt
Then tell us if it's tucked in or not.
Does your pistol (presuming a Sig auto) have a hammer spur?
Can that spur snag on clothing or is it a flush "bobbed" hammer?
Carrying beyond the 3 o'clock position means either a 2-handed operation or one very obvious 1-handed operation.
BillCA in CA (Unfortunately)