Love my 45 Shield, agree it is amazingly accurate!
I buy my Federal or WWB target ammo at Walmart in the 100 rd box, tax but no shipping.

BTW, anyone who buys this gun should be aware there is a potential problem with the magazines and some of us have experienced dropped mags while shooting which creates jams. It is easily resolved with the free updated parts direct from S&W. More details in this thread and others, use your search tool:

Shield .45 mag dropping