I very confused as to what scope to buy for this rifle in 22-250 Rem. Scopes I consider: Bushnell Elite 6500 4.5-30x50 Burris XTR 6-24x50 IOR 3-18x42 Leupold M4 long range/T 6.5-20x50 Unfortunately, my budget only allows scopes up to $900 which would exclude the last two mentioned unless I can get them for a bargain. I'm currently favouring the Bushnell but unsure how the mil-dot and duplex reticles will work on long range small targets. I'll be using the scope for distances up to 350 yards and occasional target work on longer distances. Any other recommendations i.t.o reticles/magnification range/scopes are welcome. I will be using a Warne Tactical 1 Piece Base. What ring height should I get?