I used Lone Wolf 40-9 barrels in my 23 and 27, no problems whatsoever, truly a drop-in and go practice.
The first one didn't like some Fiocchi XTP rounds I had, the throat was too tight, so I mailed it to them (Missouri) with a couple of the loads in question from (Maine) on a Monday and had the barrel back on Friday afternoon in perfect shape.
That's true customer service.
Oh yeah, it was one of the owners who talked to me on the phone and handled it personally. Can't ask for better.