I've got a old JC Higgens, made by mosburg, that my dad gave me when I turned 14. I've killed a lot of squirrels with it. Getting hard to see the sights anymore though.
While living in new mexico my son & I would hunt tassel eared squirrels in the fall. I could still shoot them in the head with open sights in those days. My son asked me, dad how do you do that? Well I shot a brick of 22lr through that gun every week for years. That much shooting with the same gun really improves your accuracy.
Regards