The REP in the oval on the right side of the barrel stands for Remington English Proof.
With a barrel code of CG, the C is for April (BLACKPOWDERX for the month) and the G could be 1938, 1960, 1986 or 2012. Given that it has the X-Mark trigger you’re looking at April, 2012.
In some years there are three letters so as not to be confused with previous years.
Last edited by navlav8r; 09/21/21.
