I have never hunted with open hounds other than a Jagd terrier !!! He could sometimes get it done but what usually happened was the hogs would hear him coming and run like hell. I personally saw hogs run ahead of him after they heard him bark. From talking to people the only way you can catch a hog with open hounds is if the hogs stops. I guess maybe some really fast hounds that can close the distance and/or run him till he is tired. I have heard too many stories of hound hunters having races that last for hours and hours. One guy told me his dogs would run one off of a 25000 acre plantation. On small porperties that ain't good. I personally don't have thousands of acres to mess with a hound. Big properties I guess they are fine. Small properties no.
QUIET DOGS = SHORTER HUNTS ?
OPEN DOGS = LONGER HUNTS ?
Jagdterriers are not open mouth hounds. Some are open on track, some mostly silent and some totally silent. I have nine and they are in the last two categories. In fact I have never heard of an open mouth jagdterrier, except for some very inexperienced posters on another board, making overly broad statements from have hunted with one Jag, one time. A green Jagdterrier is highly likely to run on open trail mode, but they, like curs and a few hounds, learn to shut-up to catch up. I have hunted with many curs that are more open on trail than Jagdterriers.
JSH stated it earlier TRACK SPEED is where its at. Hogs can only run all out for a short while, then tire fast. If a dog lets them trot and walk, and their trot is about 15 mph, that hog can hold that pace for all day. But a dog that puts just a little more pressure, so the hog has to break out of that trot every so often, it will tire and bay up. Then if the dog tries to catch the hog or attack too hard, its off to the races again. However, if the dog bays it ata reasonable distance it might stand there all day. If it goes to break bay at a walk, the dog has to hit the back end to out it back into standing mode. Sometimes if a dog is too hard on the back end, it makes matters worse, and the hog is running again.