Frankford Arsenal FA-70 primers


#1

Picked up a dozen sealed boxes of primers with the following label:

                                         100
                                  Primers NO. 26
                                          for
                                CARTRIDGES CAL 30
                                -----------------------
                          PRIMER COMPOSITION FA 70
                          PRIMER LOT NO. 5464
                              --------------------------
                                FRANKFORD ARSENAL
                              --------------------------
                              ---------------------------

         ON THE BACK IN VERY SMALL LETTERS IS:
                 Army-Frankford Arsenal  PA.


             It is a white box with black lettering

Are these corrosive & when were they made???


#2

USDF

The F. A. No. 70 primer is a Potassium Chlorate mixture first adopted in 1919. I believe that the “NO. 26” designation was one used during WW II which may give a clue to their age. Someone more knowledgable than me needs to respond. Regardless, original sealed boxes will have some collector value, obviously.

Ray


#3

I do not know when the No. 26 primer was made, but the FA-70 primer mix is defiently corrosive. This primer mix was adopted 19 Aug. 1918 and was used until it was replaced in 1952. During the period of 1941 to 1952, experiments with the non-corrosive primer P-4 were conducted, but the corrosive FA-70 continued in use until 1952.


#4

Ron & Ray, Thank you for your help!!