Redirects

Hi, I want to make sure that this doesn't cause a problem.
I have Multisite 3.1.2
Each time a sub site is created I have a new blog template set up with a navigation menu of pages.
Some of these pages will be redundant on each sub site (eg contact main domain) so I am just redirecting the pages to the main site instead of generating duplicate pages.
I am using 301 redirects.
Is this behavior penalized by search engines? Should I be doing this differently?
Thanks!