Don't confuse the normal pecking order pecking with habitual feather pecking/ eating. Feather pecking is a boredom habit. You shouldn't need to use the bits to prevent pecking order which is perfectly normal behaviour.
There's three types of pecking behaviour which have different causes.
1 Territorial disputes - happens when you introduce new birds to an established flock. The old birds will try to drive the new ones away and serious fighting and injury can occur. The old birds will often guard the feed and keep the new birds away so they can't feed (or drink). The cure for this is to introduce the new birds gradually so they are accepted as part of the flock and have several feeders and drinkers in the run to ensure the new birds can feed.
2 Pecking order disputes - happens when new birds are accepted into the flock they have to find their place in the order. There's no "cure" for this, it has to happen and is part of their natural behaviour. Use purple spray to treat any injuries but usually it's just a not too viscious occasional peck.
3 Feather Pecking/ eating - which is a boredom habit and can be triggered by over crowding, over feeding, too high energy food so the birds don't need to forage, lack of stimulation in their runs. Remember healthy birds are active birds and over feeding with scraps and treats reduces their activity. Lack of protein is sometimes cited )but is rarely a cause in my experience) and moult can also trigger this habit. Consider feeding higher protein ONLY if this behaviour starts in a period of moult as high energy feeding can reduce foraging and increase boredom. Note the over feeding advice above. Beak bits can be used to break an established feather pecking habit but probably won't help with pecking order pecking.
Here's a photo of a Vorwerk hen with an antipeck beak bit. They will eventually bite through them but by then the habit should be broken.
HF