I'm pretty sure there is a combination here somewhere, but I have yet to find it....
Full Text - sends the whole blog post to rss feed
Summary - sends ~300 characters to rss feed
Full Text + read more break - sends whole blog post to rss
Summary + read more break - sends first 300 characters to rss (break at 500 char)
FeedBurner (for example) - can be set to show first X characters of a full post and ignores read more break
Is there a way to have the blog send everything up to the read more break to the rss feed regardless of number of characters?