I've been using Lone Wolf barrels for years. Very happy with them. The chamber dimensions are noticeably tighter than the factory Glock barrels. In both 10 mm and 40 S & W. This cuts down, the potential Kaboom factor substantially. Big plus if you hand load.
The only trouble I had with Lone Wolf, was with a .357 Sig barrel I bought for the G 20. i was shooting factory .357. And getting stretch marks, (incipient failure), marks on the fired brass. Lone Wolf was very accommodating, and sent me a replacement barrel. Same story with the stretch marks, unfortunately. They refunded my with money, no problem at all. I later noticed, that they quit selling 357 Sig barrels for the G 20.