Is This a Loose Chamber?

[Phil3]

I shoot an AR-15 and soon, a Howa, both chambered in 223 Remington. I was curious on what is considered a "loose" neck, in terms of dimensions. 1x fired Winchester brass from my AR-15 (Krieger barrel in 223 Remington) shows a neck diameter of .253 to .254". Is that considered "loose" or? Some factory loaded ammo shows a neck diameter of around .248". That would suggest the brass is undergoing at least a .006" neck diameter expansion when fired.

Phil

 

[LawrenceHanson]

In my experience factory chamber necks for .22 caliber centerfire rifles are typically .255".

 

[bigedp51]

Long ago when Eisenhower and Kennedy were presidents I lived south of you in Milpitas before it was asphalted over and turned into the Silicone Valley.