Both purchased from Lonewolf. The one on the left was a recent purchase of a 6" G20 barrel for my Longslide project. Did some research on other forums that are 10mm specific and apparently this is the norm for Lonewolf now...at least in 10mm. They were getting too many barrels returned because people were seating their bullets with too much C.O.L., or using certain large heavy cast bullets. Guess they got fed up with it and overcompensated by breaking down the chamber around the feedramp too much, at least too much for my liking.
Recently purchased G20 6" Storm Lake support:
