Headstamp question on 50 AE


#1

I recently acquired a few 50 AE rounds with a headstamp of MRI 50:AE Does anyone recognize MRI? I suspect the “:” between the 50 and AE is also meaningful as to manufacturer of the case.

Please respond as to MRI and the probability of case manufacturer.
Thanks for any help.


#2

Magnum Research, Inc.
The colon between 50 and AE means the case was made by Starline. The 20-round black plastic box it came in has the name SPEER, Inc. molded into the inside of the lid.


#3

Thank you for the very quick response.


#4

Gary,
MRI stands for Magnum Research, Inc.; they make the Desert Eagle pistols.