As far as i am aware necking down is a little more desirable than necking up if you have a choice, more chance of donuts forming when necking up, as part of the shoulder is formed into the base of...
Type: Posts; User: GWH
As far as i am aware necking down is a little more desirable than necking up if you have a choice, more chance of donuts forming when necking up, as part of the shoulder is formed into the base of...