I've shot the Winlite reduced recoil slugs (I'm pretty sure they are the same as the Ranger).
Out of an old winchester 1200 they shot very well. At 75 yards w/open sights I could consistently hit clay targets.
These slugs should be fine for deer hunting @ ranges up to about 75-80 yards (if they group well out of your gun).
....And you're right, the recoil is very mild compared to standard velocity foster slugs.