Raptor,
Full Metal Jacket is a fairly accurate rendition of Marine Corps boot camp, but not exactly correct. The most accurate thing in the movie was the DI, probably because he was a Marine DI in real life. He was hired to be a consultant and ended up playing the role. When I went to boot camp we had three DI's and at times up 6. If you want to see what's it's really like try and watch the documentaries that they have on Discovery channel.