Well a few hunts later and some experimention with different discrimination settings and its pretty much the same old same old. Did dig up one childs ring. I guess a rings a ring.
Unfourtnatly I am finding with further bench testing that the ace 250 can read pretty much anywhere when it comes to precisious metals and can jump around the entire scale. As was said this pretty much means digging everything.
I guess I cant complain at two to five dollars per hunt in loose chang the machine will make reasonably short work of paying for itself but if I were asked as to the abilitys of this detector I would put it in a coin shooter only catagorie and an excellent coin shooter at that.
I suspect down the road I will upgrade to a different machine and use the ace as a loaner to a friend that has expresed some interest in the hobby. Knowing my luck at that point it will start finding every peice of jewelry on the beach and it will take me five years of digging up loose change to pay for my upgrade