Big running pointers can be hard to reign in. Do what mustad suggests, let the dog run alittle to burn all the pent up energy before starting the hunt. But if the dogs natural range is to run big, unfortuneately, I have not heard of a good solution.

We had a young big running pointer in our group once. The dog was trained to quarter (which is frowned upon today in FTs). We would position ourselves about 30 yards apart with about 5 people on average. We would walk the fields and the dog quartered for all of us so it had to range close considering it had to run 150 yards crosswise. Then again, the dog was hunting for us and not for itself. My current dog I have to reign in sometimes because she gets too excited and starts hunting by herself.

Get a whistle (not a silent dog whistle) and start overlaying commands with it. The sound will carry longer distances than voice will. The next suggestion would be is to get an ecollar with a long range - up to 1.5 miles.