Hey Guys, Though I would run this by you all since I trust your opinions and you have been gentlemen in your responses to my posts in the past. I recently slugged my new 1911 Government barrel and it measures .4515". I reload and shoot both LSWC and plated .452" 200 gr bullets. I contacted the manufacturer of the pistol and they said their specs are .4505 +-.0015". That being the case, you can get a barrel with a .452" groove, mine is .0005" off that and it's new. I don't want to get in to loading data and bullet sizes right now but would rather have someone tell me how they would feels if this was your situation and how acceptable is this. The manufacturer is very reputable and the pistol in marketed as a "Match" pistol with "Match" barrel. I know to shoot very serious match you get another "true" match barrel but this issue is bugging me. Your input is greatly appreciated....thanks guys