I have never tried the stretch brand. But ive had good luck with criteion rifle length gas and have been got the last two barrels in 5 wks .I know how you feel I am presently finishing up one build, I have one I am presently gathering parts for and I just specked out a new build today. But I am with you, brother! I don't have a problem! Nope it's definitely not a problem! Not a problem...
You wouldn't know how to get your hands on a stretch 16 barrel would you???
they r also button rifled. I normally build around a cut rifled barrels , but button barrels offer a savings .
proof carbon and bartlien have been my best shooting and easiest break in barrels time and time again.