My daughter is 2 for 2 with the xbow, and I shot one last season just to try it.
I normally just use a bow.
I have my bolts set up with a high f.o.c....92 grain brass insert and a 125 gr. broadhead.
The gives me extreme accuracy, I'm not worried about penetration as the bold blows right thru em.
I like a 3 blade expandable, wasp jak hammer, 1 3/4" cut. And wait for a broadside shot.
What I have trained my daughter to think about is hitting them where the wing meets the body....or the upper part of the wing, above the brown bar....and that's where I aim with the bow as well.
Never had one go further than 10 yds hitting G them there.