Dugaboy1, sounds good to me.

Can you or anyone provide an answer to my question following?

"Do guns that exhibit OSR demonstrate measureable dimensional changes to any part of the gun? {OD or ID bore/groove measurements, action damage, etc}? If I understand the problem correctly, there are some or many guns that show OSR that do not also show rib damage or other damage.

The earlier post describing the barrels taken off face I'm assuming to be a exception since I would think that condition would be a result of excess pressure, and as I understand it, OSR itself is not a result of excess pressure per se, though it sounds like at least in that situation, a gun that demonstrated damage caused by excess pressure for some reason also exhibited OSR.

Anyway, are there guns that exhibit OSR that do not show any {or much} internal dimensional change to bore/grooves?"