I don't think we have any PRS matches scheduled in Socal this yr. Your best bet is to shoot monthly matches. The two locations near you are hosted by SCPRT and Sin City (out in Vegas). Local matches usually require 70-90 rounds. Your 6.5 creedmoor will be perfect.
SCPRT has their monthlies ever 3 Sunday of the month (located near the 210/15 fwy). More info can be found here.
http://www.socalprecisionforum.com/view ... 13c755144fSin City Precision has matches on the 1st Saturday of the month. If you're on FB look up Sin City.