Help ID this old ammo?

[msmp5]

I found about 300 rounds of this stashed in a dusty corner of my garage today. I'm guessing it is "Lot 22" and it dates to 1969? Not sure what the O. F. N. on the headstamp stands for though. USA Mfg? Foreign mfg? Wondering if it is Berdan primed and possibly corrosive? Any thoughts from you experts? And is it still safe to shoot? (I live in a mostly dry climate, so I hope that has helped.)

Does anyone know of a web resource for looking up ammunition headstamp markings?

 

[Ironicaintit]

A quick search found this thread...

http://m14forum.com/ammunition/38086-ofn-21-69-7-62x51-ammo.html

Supposedly, non-corrosive Nigerian

 

[Scooter22]

OFN Ordnance Factory Nigeria. http://www.cartridgecollectors.org/headstampcodes?page=headstampcodes#O

 

[msmp5]

I looked at those two websites that were referenced, many thanks for steering me to that information. So the consensus appears to be that it is non-corrosive, which is good. But I'm still wondering if anyone knows with any certainty, whether this stuff is Berdan primed or boxer primed. Any thoughts on that?

 

[Ironicaintit]

I think guy with the thread on the m14 forum mentioned that he could load berdan...
You could always fire it and find out real quick

 

[Steel Horse Rider]

You can always shoot one and look into the case with a light. One hole or three will confirm the primer. I meant two holes, small brain fart.

 

[Jim Watson]

Measure the diameter of the primer.
US Boxer Large is .210" diameter.
The most common Berdan rifle primer is 5.5mm .217".
Hmm, can you tell 7 thou on the back end of a cartridge?

 

[Scooter22]

Go shoot it. If it's boxer primed you have easily loadable cases. The age isn't a problem. Pull a bullet and dump the powder. If it isn't getting a redish dust on the powder and smells ok(not bitter acidic) should be fine. I have 8x57 ammo from the 30-40s thats fine.