Hard to tell on my phone but I think I see sharp edges so yes its excessive wear.
Shouldn't be that much wear for 250 miles, are you sure the dist.is sitting down in there or is it cocked a little? I have about 1000 miles on mine and it still looks new.
Are you running a billet steel roller camshaft in your new motor?
I have also heard that the composite distributor gears last longer than the bronze gears.
When I was racing I used a bronze gear because it was soft and would not tear up the cam. The bronze gear was consider a throw away rather then the camshaft which cost much more. I don't know if this is true today but bronze is consider a soft metal.New motor has about 250 miles on it now does this geAr wear look excessive to you guys