Pin Gauge sets

Hello guys, I’m curious from those that have done barrel work what brand and type of gauge sets you have ordered for indicating a barrels runout. I’ve seen deltronic sets, are you ordering in metric or imperial and if so, are you using the half thou sets? I have a classing cloche steer 13″ swing lathe with my own made four jaw adjusting sleeve, so as to keep the three jaw in for the general machining I do as a fabricator. I want to do some work on a .22 cal LW barrel and also a .25 LW . Thanks in advance.