How many rounds do you shoot through a new gun before you make it your edc?

I finally saved up enough money to get me a new concealable handgun in the FNH FNS 9c, to "downsize" (only slightly smaller, but every little bit counts when sitting in 2 hour long lectures) from my sig sauer p250c. Tomorrow is the first day of class for me and I plan on carrying my sig until I have a chance to shoot some rounds through my new gun and get comfortable with it.Most of the mechanics are the same, so it shouldn't take me long to get comfortable with it. I'm assuming 100 or so rounds should be good, but this is the first gun transition I've done. I'd like to hear CCW's opinion. via /r/CCW http://ift.tt/2bsPlxN