TC1,
I have one (Bushnell Elite 3200 10x40 MilDot) and despite the lack of parallax adjustment find it works just fine thank you on my 223 here:
Scope is SKU#321040M Mil-Dot w/80MOA 1/4"adjustments, 11' FOV @ 100 yds, 15.5oz, factory-set parallax-free at 100 yards.
Good article on parallax in riflescopes:
http://www.6mmbr.com/parallax.html