[4V50 Gary]

We put the barrel in a barrel vise and then use an action wrench to install the receiver. We "slam" the wrench three times, that is, when there is about 1/2 rotation left, we throw the wrench as hard as we can. Think of it as an old airplane that needs to have the propellor thrown. Same thing. After the third time, the barrel and recevier are as tight as it is going to get. We then check the barrel with a "go" gauge and then a "no go" gauge.