I feed whole shell corn. All the research I have ever seen, says WSC is 8% less efficient than other processed corn. If you can buy WSC 8% cheaper, that is the best way to feed out your cattle.
I feed Sept/Oct born steers to an average 750# hanging carcass at 12 months of age - on WSC.
Yes, you will SEE the corn in their manure, but the other corn is there also, you just can't SEE it as well. 8% - think about that and price it out.
I feed WSC to my show string - and I win. I do not buy fancy bagged show feed. I mix my own with WSC as the basis.
You are paying a pretty penny for rolled or steam flaked corn. Yes, it looks pretty. Pretty doesn't make me money.