welcome to TFL
Factory original barrels, when numbered, will always match the receiver number. Factory replacement barrels (if numbered) will be numbered to match the receiver. This is the usual standard practice. It's always possible exceptions exist, but generally speaking, if the barrel ser# and the action ser# don't match, its strong evidence that, at some point, someone replaced the original barrel.
One finds two general kinds of barrels as replacements. One kind is the correct barrel, properly fitted by a competent gunsmith.
The other kind is some barrel stuck on because tolerances allowed it to fit, and those may or may not be functional or safe.
Also, without knowing the production history of the maker and that model gun, a "high" serial number may not mean what it seems.
The first gun off the line might be #0001 and numbering might go sequentially up from there. Or there might be gaps in the sequence, or the series might start at a high number and go from there. This is entirely dependend on the maker's policy at the time.
Sometimes, high seeming numbers are not, they just use a number code at the beginning as a year code, or something else.
Lets say for example you've got a gun who's number is 190050. Is that gun the one hundred and 90 thousand and fiftieth gun made?? Or is it the fiftieth gun made with a number system that starts with 190...? Or the 90thousand and fiftieth gun in a series that all start with 1 ? Or something else?? You need to know what the maker did when numbering guns to have an idea which of those is correct (if any of them are
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Also be aware that lack of information on the internet only means a lack of information on the internet. The information may not exist, OR it may exist and simply not have been put on the internet by anyone.
I know this isn't much useful information, but I hope it helps some, at least.