I have never used corn for bream. I caught my share of trout on it though. On one bream trip, I had some salad shrimp left over from a trout trip the day before. The bream tore them up. And, they stayed on the hook better too. Since then I have experimented with coloring them with food color and adding some minced garlic. I didn't see any difference than just using them as they come.
DP