A barrel should be inlet up to the center line of the bore, or in other words, half it’s diameter should be below the wood line. All too many new gunsmiths and hobby gunsmiths just inlet until they can get the screws into the action and call it good.
There is a simple way to make sure your barrel channel is deep enough so that the bore line will be aligned to the top of the stock. Take a square and place the outside 90 degree corner of the squared into the barrel channel. If the square touches on all three sides then the barrel channel is a half circle.
If the point at the bottom of the barrel channel touches and keeps the sides from contacting the top of the stock then your too shallow. Conversely, if the point of the square does not touch but both sides are in contact with the top of the stock then your past 50 percent depth.
Fred Zeglin is working on a series of booklets, “Gunsmithing Student Handbook Series”. This little how-to tip is just one peek into the upcoming books. What gunsmithing tips would interest you?