A friend owns a Herter's U9 rifle by BSA that will not allow the bolt to be withdrawn in the usual method. According to DeHaas's book on bolt action rifles, bolt removal for this rifle is to lift the bolt lever and withdraw the bolt about half way, then depress the trigger. This will drop the bolt stop which is part of the trigger assembly and the bolt may be removed. His gun will not do that and the action must be reomved from the stock and the bolt stop manually pulled out of the way with dental pick or something like that. Then bolt falls right out. So, does anybody have any experience with this trigger assembly? The internals of the trigger are encased in a tall U shaped piece of sheet metal so that none of the workings are exposed or visible. I am guessing that there must be some component of the assembly that drops the bolt stop when the trigger is pressed and it must be either a linkage piece of maybe a spring. Before I attempt to fix by tearing into it blindly, I was hoping that I could get some pointers from someone who has been there done that. Thanks for any help.