If your looking to do some longrange work what ever you buy make sure you get the most minutes or MOA you can for your budget. A 223 doesn't have a lot of juice at longrange so you need all the minutes you can (it will shoot as far as you want though). The higher end scope such as Leupold, 6500 and some 3200 elites have enough. The Leupold will cost more but last forever. My self I am not a fan. Also make sure you have a 1/4 MOA adjustments. Form what I have found most scopes with the adjustment range have more minutes (there are some exceptions). Other that that it is all up to what you want to spend or what you can get in some cases.