I paid $2.12 per shell for coppers back when they were somewhat "less expensive" than what they are now. The Hevis are higher; I've never shot them, but everyone I know that shoots them says they are simply incredible.
i have used 'em for 3 yrs.just dropped $100 on a box of 25 however now i know they should last me about 8yrs,well worth every cent in my 835 moss. tried the new win. xtended no. 6's and wasn't impressed.they did do well in my brothers exact same setup though.i think you can purchase the nitro and rhino at www.wingsupply.com. the nitros hevi's are about $5 ea unless you buy a 25 box for $98.