If you use the word clip the gun snobs wont let you in their club.
I carry a G23 with the magazine in it, so 13 rounds, then i carry an extra magazine in my pocket or on my belt (usually pocket though). so I carry 26 rounds altogether, never had to use any of it, knock on wood, so 26 rounds seems like more than enough. i like the comfort knowing i have an extra magazine with me though. but carry what works for you.