Well I have 3 Pro Hunter Barrels. In 243, 223, and 300. The 243 is a tack driver, Killed several Deer to 300 yards, you could hear the report when the 100 grain sierra spitzer BT hit the boiler room. The 223 shoots acceptable, have trigger jobs done on the three above and am working up loads for the 223 and the 300. They should all do better now that I don't have to stand on the triggers to get them to go off, triggers on the thompsons leave a lot to be desired, especially when you are use to light ones. If your guns is not shooting to your expectations it may be a fore arm bedding problem, alot of people I know use hanger bars, or they improvise a bushing that is epoxied in the fore arm where only the bushing is contacting the barrel. I have been loading for more than 40 years and found to achieve outstanding accuracy you must find the load your barrel likes, like some other things no 2 are alike. Good Luck. Lou