Headstamp identification

[kestak]

Greetings,

I think I mis-identified an headstamp and I wonder if someone here could help.

I have 500 S&W brass. I thought *-* was starline rifle primers. and *-*-* was starline with pistol primers. But I just red on their website they now identify the rifle primers brass with a R besides the 500. Any idea?

Thank you

 

[kestak]

Greetings,

Per Starline website:

"Cor-bon has also tested and recommends CCI 250 primers (Magnum Large Rifle). Our new cases will have an "R" after the "Mag" on head stamp to signify rifle pocket. If you have previously purchased 500 cases without "R" on head stamp and wish to modify, you can use a large rifle pocket uniformer to deepen primer pocket to accept large rifle primers by deepening pocket approximately .006". This will not affect integrity of case. For concerns regarding situation contact Smith & Wesson or Cor-bon as they designed case and subsequently changed it. "

Is .006" such a difference that you can't use LR in LP pockets safely?

Thank you

 

[ReloaderFred]

Yes, it is significant enough to cause high primers. If you intend to use Large Rifle primers in cases that were manufactured for Large Pistol primers, you'll need to make the primer pockets deeper, as outlined in the instructions from Starline.

Hope this helps.

Fred