I bought a deluxe die set for the .338 lupia and it has 2 resizing/decapping dies. 1 has 3T and the other has 4Q on it. what is the difference between the 2 dies?
Pretty sure those "random" markings are like lot numbers for them. If you have an issue with the die, Redding can find out when it was made, who was on it, etc. Every die I have from them has a random pair like that at the end.