"Like the boxlock, the sidelock can be stronger, or weaker, depending on the type of side lock that is fitted. If the sidelock is a forward sprung type, it makes the action bar weaker, if the side lock is a back action lock, then the stock is weaker, just the same as the boxlock."

I do not agree with this statement. The interior of the stocks of the back action and bar action sidelocks that I own have similar amounts of wood removed toward the rear of the lock plates. The back action does require less metal to be removed from the bar however.

JPK