First off welcome to the forum
I have the nef hertage( it is a sidekick with a camo stock). Mine likes 90 grains of 777 and winchester platnum tip sabots but i keep my shots less than 100 yards. If you do a search here on the forum you will find tons of info on NEF's.
http://www.huntingnet.com/forum/searchpro.aspx?phrase=sidekick&author=&for umid=26&topicreply=both&message=body&t imeframe=%3E&timefilter=-365&language=single&top=300&criteria=A ND&submitbutton=+OK+