If you feel the need to crimp your loads use the Lee Factory Crimp Die. It will work with any bullet "groove" or not.

http://www.leeprecision.com/cgi/catalog/browse.cgi?1169867624.2053=/html/catalog/dies-crimp.html

Many reloaders use the Lee Factory Crimp and claim increased accuracy. Give one a try, they only cost $8. Here is some interesting reading on the LFCD.

http://www.accuratereloading.com/crimping.html