Just me talking but what does it matter if your dog only hunts 100 yds out if you road them. You will eventually cover the 800yds in a matter of minuets in a vehicle. Now if you walk thats a different story all together. Last of all you must have the land to be able to hunt.
Anyway sounds to me you have a great dog that has tons of bottom, in my book that says more than a dog that will go out 1000 yds and not produce a hog at the end of a trail.
X2
just a thought..... but maybe try finding a good plott!!! plenty of them around and not to hard to find one that is silent till looken at a hog