Buddymack,
Your C and R gets your eligibilty done for the shooting requirement of CMP, and as soon as you join GCA, they'll send the info to CMP to complete the other requirement..
Currently, the wait is very short. I think most rifles are being shipped within two weeks of CMP getting the order, or so I'm told.
They'll get your paperwork/payment and send you an email telling you that they've received the order. You're not charged until the rifle ships, and they're sent out Fed Ex Next Day Air, signature required. Right now, they're shipped in a really nice CMP hard case, that's inside a cardboard box.
They just started offering Winchester Service Grades, and I think a few people have ordered them, but I think they're still pretty well caught up on rifle shipments.
Order a SA or HRA Service Grade for $595 and you'll be very happy with your purchase. And if there's even a remote issue with the rifle, the customer service at CMP is second to none, and they'll do whatever's needed to make it right and you happy.