How common is it to find .327 magnum ammo?

I am looking at getting a Ruger LCR in .327 so I can get an extra round instead of 5. My only concern is the availability of finding ammo. My impression is that it is a uncommon round that most gun stores do not carry that much or any of it at all but I do not know for sure. Have any of y’all been able to find it anywhere? On average how many stores carry it? via /r/CCW https://ift.tt/3uP2R1r