I won't expand on it too much...
I ask because I purchased a nice little SXS from someone and took her out to run some shells through her at some clays. Everything worked fine. Got home and was wiping her down and felt a bulge on the left (FULL choke) barrel....hmmmm
I did some research and found out about the steel shot problem...NO, I DID NOT SHOOT STEEL THROUGH HER....#7 light field loads.
Anyhoo, I checked inside the muzzle and found two 'lines' (cracks, fissures, I'm not sure what to call them...). They run only on the bottom half of the barrel about an inch - inch and a half in.
I'm no expert, and didn't want to make things worse, so she's now on her way to a Gunsmith for inspection and possible cutting...there are many variables that have to be determined yet.
Can't say I noticed them before I took her out, so I'm in no hurry to call the seller and ##### to him...if they were there, its even possible he didn't see this issue either...I like to give the benefit of a doubt.
I'll likely know the prognosis within a couple of weeks...here's hoping.