Took a minute to acquire a ball micrometer, sorry.
Measured neck wall thickness at four points around base of neck just above shoulder, five random once-fired cases, found the following. Remains unclear to me. You?
.0082, .0082, .0078, .0075
.0072, .0078, .0081, .0077
.0076, .0075, .0073, .0071
.0082, .0073, 0074, .0079
.0080, .0082, .0075, .0082