quote author=coyotehunter223 link=topic=244770.msg1099410496#msg1099410496 date=1320972252]
I read somewhere that NEF alwys etched or engraves the last 3 digits of the serial number on the barrel indicating it has been fitted to that receiver. I bought a used 12ga Pardner serial number NH........ and it does not have that. It feels like a nice tight lock up though. Could I be in danger of someone having just swapped barrels?
The only time that possibly could be a problem is, if you had a high pressure rifle barrel (like a 308) on a shotgun (SB1) receiver. Since your talking about a 12Ga., the answer is absolutely no.
If your still worried, make sure you take the barrel off the receiver, then look for the numbers, usually on the left side of the barrel lug. But if there aren't any numbers there, like cwlongshot said, don't sweat it.