The major problem I have with "feed" wheat is the high percentage of weed seed in the mix. After using feed wheat several years in a row, I now have some highly noxious weeds in my plots that are not native to the area. I prefer to pay extra and get "certified" wheat seed (certifed germination rates and weed-free).
Honestly, of all the cereal grains, grain rye is the easiest to grow. I swear it will grow on concrete. When I accidentally spill some seed in my gravel driveway I get excellent germination in the gravel. I've gotten pretty good stands of grain rye even just broadcasting seed onto the top of bare clay soil--no ground prep, fertilizer or lime, and I'm talking about acidic clay soils with a pH below 5.0