I nob question here, so please be kind.....

I understand the s/n receiver date lot txt file on
http://vishooter.home.att.net/ra_serialization.txt

But the "Serial Number/Barrel Date Lists":

http://vishooter.home.att.net/RA3.txt

I'm not clear on.

Is that a list contributed to, by people of barrels "known" to be original vs receiver numbers?

TIA...