[Guido]

Going through my Olde Dads 9mm brass I noticed he had marked a few boxes as "R-P Lg." and "R-P Sm." A quick glance proved that the brass is R-P but the boxes marked Lg certainly do not have large primer pockets.

Can anyone shed some light on what these markings might mean?
Guido

 

[Guido]

The jokes on me. I almost fell off my stool when I figured this out.
Not only is the font of the head stamps different sizes but the millimeter designations are upper and lower cased.

 

[noylj]

So, what was the difference?
R.P. is the "normal" Remington-Peters headstamp. Sometimes, the case walls are too thin to hold the bullet unless you use a undersize sizing die.

 

[Tailgunner]

So, what was the difference?
R.P. is the "normal" Remington-Peters headstamp. Sometimes, the case walls are too thin to hold the bullet unless you use a undersize sizing die.

The difference is / was the BUNTER used to headstamp the cases. IOW they are from different production lots