A lot of European's use shotguns on driven hunts as they generally very safer when you have a number of hunters in close proximity. As regards potential wounding - well this happens even if rifles are being used and its why all driven hunts will have well trained tracking dogs on hand to follow any wounded animals. And on driven hunts that I have been on, unlike a phaesant drive, guns are dotted throughout the woods and fields. And the beaters work in figure of 8 rather than in a line. Most deer and pigs when disturbed or when wounded don't run in a straight line, they tend to circle - hence this way of driving. And the beaters will usually carry guns for dispatching wounded animals and also for when the dogs bay an animal.
The mindset is very different to the UK - primary aim of a driven hunt is to get numbers down, and 60 or 70% of any cull will typically be done over only one or two hunts in the year - in the winter. Otherwise the woods are left undisturbed. And what tends to happen (or certainly in central Germany) is that all the various reviere's (hunting leases) combine efforts. So this week you have 30 guns and 20 beaters doing one riviere - and next week they will do another several miles away, but over the season the whole area is covered. There is generally an overall cull plan in place (agreed between the hunters and Forstmeister) and once cull plan is achieved then the hunts stop.
In the summer - it's the time for selective culling - especially of the older animals, and its here that the hunting happens on the woodland edge and out in the cropped fields. Part of the aim is to protect the crops from damage and to keep the animals in the woods where they belong.
I have used a 12 gauge a couple of times in anger on big game - once on an impala which dropped to the spot at a range of 20 yards, and secondly when following up a wounded lion - because that was all that was available. And the shotgun was weapon of choice for protecting your home in the troubled times in Africa - a single Buckshot cartridge is equivalent to several pistol bullets and they make one hell of a noise when shot indoors. No 6 shot also works well - very good for snakes and does n't cause quite as damage to decoration.
On big game the secret with a shotgun is to be close - as in 20 to 25 yards close. With big animals intent on damaging your own hide - make it single digit - you want powder burns and in effect you are sending a solid 1 1/8 oz ball that dumps all its energy straight into the target. Depending on the load, most 12 bore shotguns deliver over 3,000 ft/lbs of energy at the muzzle. By contrast most stalking rifles have a muzzle energy of 2,500 to 3,000 ft/lbs - but of course carry this a long way down range, unlike a shotgun.
But I digress.