Artie,
The coating is lubalox. It's a coating marketed and trademarked by Winchester. It's similar to Moly. The biggest advantage is cleaning less, when you do clean though, depending on your cleaning method, you might have to fire the rifle up to 6+ times to regain your POI. Although Nosler says differently, I have had to fowl my barrel after brushing when I used the CT Silver Tips. I tried the CT's after shooting Moly for years in 22-250's, 308's and in my 300 jarret. I never noticed an appreciable difference in accuracy so I have given up on coated bullets. My life and range time has become easier. Here's a clip from the nosler WWW for you to read
Are Lubalox and Moly the same?
NO, Lubalox (CT Ballistic Tip) is an oxide-based coating, which reduces fouling and allows more shooting between cleanings, also Lubalox does not buildup in the barrel and requires only normal cleaning procedures. Moly (CT Fail Safe & Partition Gold) is a molybdenum disulfide coating which reduces fouling and friction. Moly requires a barrel be conditioned by shooting several rounds after cleaning and special cleaning procedures. Accuracy with non-coated bullets may not be up to par in a Moly conditioned barrel.