sourcing a file in a macro

[Eric Smith]

I am trying to do something like this:
macro index y "!vim /home/eric/.muttrc\nexec source /home/eric/.muttrc"

The first part I have been using for years - very useful by the way
especially when you have the following autocommand 
autocmd BufRead * normal `"
(returns you to where you were in the file when last edited)

Problem is I want to source the muttrc directly.

how?

-- 
Eric Smith