When you create your own RSS feed (highly recommended) you can post the entire article.
I've created feeds with 35-50, 400-600 word deduped and optimized articles. Works like a charm and its unique content.
It takes time, but its worth it.
Also, if you know how to encode your item description you can embed links, youtube videos, etc. in your feed.
Here's a simple example of how to do it:
Your article text here.http://www.yourdomain.com/">Keyword(s)
More article text here.
]]>Good luck
Ernie