I begin to see . Basically what has been described was a production technique to tin the barrels before the ribs were laid rather than just flux up and wipe down with solder as in a more traditional way . I suppose if you have a high production rate then it may have advantages but still seems to be counter productive in man hours .
Just a point of interest I took the ribs off an old hammer gun last week as the loop had come loose and had lifted the bottom rib so all ribs needed to come off and be relayed . It was absolutely spotless in side , fully tinned and first time I have ever noticed it ,it smelt of pine ! So what kind of resin had been used when the ribs were originally laid , I know not .
