If the barrel to stock fit is correct, a person should never have to remove the barrel from the stock unless some type of repair is needed to the stock or barrel. Same goes for wedged barrel to stock fits. Where many people for years have made the mistake is always assuming they need to remove a barrel from a stock to clean the firearm. Not true at all.
As for a loose pin, a person can push beeswax into the pin hole, rub beeswax on the pin and insert the pin. This will keep the pin from working back out.
As for a loose pin, a person can push beeswax into the pin hole, rub beeswax on the pin and insert the pin. This will keep the pin from working back out.