Google treats 302s and 301s differently when it crawls. A 302 is effectively ignored and the search index isn't updated - the original URL that threw the 302, i

Google treats 302s and 301s differently when it crawls. A 302 is effectively ignored and the search index isn't updated - the original URL that threw the 302, is left in. Whereas 301s result in the new redirect target URL replacing the original in the search index. By filling up your sites with nested 302s (following this to it's conclusion, in ~10 years time), is not only a management headache, but may fall foul of Google (I'm not sure nested 302s, will send positive signals to Google) and result in your whole site being de-indexed.