Grant, the specific gauges involved are:
Brownells P/N 184-000-036 (Clymer NO GO for 5.56) Dimension is etched on the side of the gauge, but I don't recall what it is. (I'm at the office)
and
Brownells P/N 319-223-467 (Forster NO GO for .223) for this gauge the dimension is 1.4666 in. as noted in the catalog web page.
The bolt(s) were stripped, gauge inserted into chamber and the bolt(s) inserted and rotated by hand. Lots of slop on the bolt closed over the NO GO gauges. I don't own a field gauge.
Vendors at gunshows tend to be similar to vendors at carnivals. You assume BS until data shows otherwise.
As to BCM, yes I have contacted them by email prior to posting here. The upper is new and unfired (by me). I got a pretty quick reply requesting I send it back. I posted here in part to get some feedback on the reputation enjoyed (or not) by BCM in the community. They seem to have a pretty good one. I also am interested in who else to do business with if BCM can't (or won't) correct the issue in a timely fashion.
I'm an "amatuer" gunsmith (mostly self taught) and full time engineer (education and vocation). I think I'm competent on the basic stuff. Measuring headspace is pretty basic.
woofe



Reply With Quote

Bookmarks