Are they rated for anything greater than 22 LR? I haven't been able to find much information in my books about them.
https://www.ebay.com/itm/1936-Wolle...hDarwoV3BBEV2b&_trksid=p2047675.c100005.m1851
https://www.ebay.com/itm/1936-Wolle...hDarwoV3BBEV2b&_trksid=p2047675.c100005.m1851