I like the 5" barrel as an all around barrel for the larger caliber revolvers.
I conduct all of my pistol shooting offhand at a 12" Gong Target. Out to 25 yards there is very little difference in hit probability or the size of the groups from a 4", 5", 6.5" or even 7.5" revolver barrel. (Last one a Ruger Superblack Hawk in 44 Mag) They are all good.
However, once I move that target out to 50 yards, the hit probability is better with the 5", 6.5", and 7.5" barrels. There are days I am hitting 6/6 on the gong, I am doing very good with 5/6 and my average is usually 4/6. If I am flinching, I am just hoping to break .500.
When I move to 75 yards, things get hard. Sight alignment and trigger pull have to be perfect. Call has to be perfect. My hit probability drops to the "no fun" level with the 4" revolvers, OK with the 5", a little better with the 6.5" and 7.5". I am doing well to hit the thing 4/6 offhand at 75 yards. I can tell that the 7.5" is doing much better at that distance, but things still are not a given.
To me, I don't think I should be shooting at any deer much past 25 yards with a handgun. It is too easy to mess up the shot on something like a deer and have it run off.
With a rabbit, squirrel, you either hit, or you miss totally. Shoot at them as far as you can see. If you get close, you will scare the living daylights out of them.
Few animals cooperate to this level.