for predator calling under a 100 yards, a red dot scope is perfect.
i had a tasco red dot on my contender 223 and it was perfect. predators dont sit still long, and the faster you can get a bead on them the better. red dots became popular because they are faster aquiring the target.
from someone who had a set up very similar to what you are talking about, and someone who has had scopes on the same gun in 30-30, the red dot was the way to go. i often found myself wishing i had a red dot on the 30-30 contender.
if i had to do it all over again, i would set them up with red dots; unless i was shooting off a bench at targets.