This tutorial explains how to redirect your WordPress site's default feed address to Feedbuner without using any plugin.

My default WordPress feed URL is:

http://www.premiumbloggertemplates.com/feed

I am going to redirect it to my Feedburner URL:

http://feeds.feedburner.com/pbtemplates

First open your .htaccess file which is located in your root directory. (Before backup your .htaccess file before making any change into it.)

Find this line:

# BEGIN WordPress

Now add below code just before above line:

<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{HTTP_USER_AGENT} !FeedBurner    [NC]
RewriteCond %{HTTP_USER_AGENT} !FeedValidator [NC]
RewriteRule ^feed/?([_0-9a-z-]+)?/?$ http://feeds.feedburner.com/pbtemplates [R=302,NC,L]
</IfModule>

It will look like this:

Note: Remeber to replace "http://feeds.feedburner.com/pbtemplates" with your Feedburner address.

Save your .htaccess file. Now your WordPress feed will automatically redirect to your Feedburner address.