Mine have headstamp 69 22 as mentioned above a few times.
The casings are steel though not brass.
MFS was mentioned earlier in this thread as being non corrosive, but this is contrary to my test with a steel plate. YMMV
Brass cass has some potential advantages even if its corrosive.
I just came back from Markham store. They have left 8 crates, looks like they are all steel cased. They allowed me to check 4 cases and they're all steel. However, they've had one 20 round box on the shelve that was copper. So, I guess they've had copper ones as well. I thing that PS gl means copper and PS gs steel. My crates have gs marking.
Are you talking about the cartridge case or the bullet?
I picked up a case from Markham 2 weeks ago and they were brass cases. I presume all the bullets are copper plated steel.
I am talking about cartridge case. Can you check your wooden boxes or better take a pics of them please?
P.S. Of course, I meant brass, not copper
Not at home this week, but there is a picture on page two of this thread.