My experience is with ground squirrels rather than edible tree squirrels. On body hits ground squirrels die quickly, and sometimes rather dramatically, when hit with hollow points - whereas hitting them with round nose they usually make it back to their hole to die a lingering death or to be eaten by their brethern.
The ground squirrels in the west are smaller and quite often a round nose will go through them with little apparent damage but the hollow points disable them.
drover
