N/A Energy impact

Depends on the quarry. I don't like exit wounds on anything smaller than a Coyote. I typically use lower power in larger calibers for impact energy with a larger surface area for small game. If not I go even lower power in small caliber in conjunction with an accurate ammo that has good expansion. That's hunting tactics. For pests it's what ever I have on hand.
 
In your opinion where does ur airgun do the most damage ,in wound channel, first impact, 1 inch in or at exit wound point ? And what ammo do u prefer ??
Depends on the ammo. Hybrid slugs are early, patriots are an inch in, nsa is a little farther and holds its shape better and might be better for bigger critters. I can't say I have a favorite, the energy levels I've got seem to be more than enough anyways so it's about the precision with my current tune.