I was using these primers in 1958/59. Purchased my supplies from Alcan. At that time I lived about 35 miles from Alton, IL. The "57" were used in Rem paper tubes. The 220 primers were excellent. Since the 57 diameter is smaller than the 209 they are of little use in shells requiring 209 primers. I have used most my remaining 57 primers for dog training. They work very well in current 209 training revolvers. Fire as well as they did 60 years ago.
I still load rifle with Herters LR primers from the 60's. I do have to admit getting about a tenth of an inch better grouping using CCI Bench Rest primers. But when developing a load, that tenth is not important.