Ed,
You've shot them for a long time and know exactly where to hit them and when to pass up the shot. I don't think I'd ever try one with a .177 until my confidence was soaring.
If I can ever get this Titan the way I want it, as hard as it shoots I'd try and possum or raccoon, but only after I know it will make one ragged hole.
Now that I've tried less expensive guns, I want a 350 in .177

Maybe I'll find a used one or tuned B 28 for not much money
