wpshooter, what you were calling "feed ramps" are actually the locking lugs of the barrel extension that act in unison with the locking lugs of the bolt.
In the above picture, the actual feed ramps are the two dished out or milled out reliefs in the bottom of the picture. There are 2 of these reliefs because the cartridges feed from the magazine in an alternating "left, right" fashion thanks to the double stack magazine.
The material removed from the barrel extension(the part that contains the locking lugs in the receiver) to create the feed ramps winds up modifying 3 of the locking lugs.
Yes, the above is normal. The majority of manufacturers have feed ramps that look like the example on the left while a few mill "M4" type feed ramps into their barrel extensions and so much material is removed that a slight portion of material extending into the upper receiver also needs to be removed.