Is this to thin to be safe?

[Cold Spring]

Here's a pic that follows on my post of yesterday. C-Grade Fox 12 ga with Krupp steel barrels, honed oversize by a hacker despite agreeing to a lesser overbore. Before the work he claimed to have a precision Sunnen hone but miking after the work showed an irregular succession of thin spots here and there. Wall thickness on this tube was .018" at the leade of its choke, and less that 50 shots with lighter factory ammo caused the bulge with its heavy choking. The other barrel was .020" thickness at the choke leade and it also bulged. As I'd posted .... lesson learned on thin barrel walls along with heavy choking; and who to trust for barrel mods. After this episode all my necessary bore honing has been done by Briley. Always uniformly dead nuts on sizing as requested.
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