I've had Bushnell Trophys in 4-12X; not a bad low-priced scope for the $, reticle is OK for larger varmints. I'd pop for a Trophy or a Legend for not much more if was staying in that power range. I believe a .204 (I have one) needs a more mag.; there are many good scopes: Weaver V-16, Bushnell, Bushnell Trophy/ Legend/3200 Elite 5-15X, Nikon Buckmaster 4.5-14 that can be had for <$300.
Good luck!