this is an old thread. but I'm going to add to it..
2010 i Switched out a 7000 aim point red dot on my s&w 500 performance, for a konus pro pistol scope with etched reticle. after about 100+ rounds through the gun the scope is holding out well and works wonderful..
http://konus.com/prodotti.php?id_c=9&id_p=462
http://youtu.be/s7_9bVqA4bg