Shuttleman,
Remember, All guns are a Law unto its self, each one has its likes and dislikes. The fun part (at least for .22s because it is relatively cheap) is setting aside time to shoot various different brands and types of ammo. My Ruger 6" Standard (made in 1961 :wink: ) loves Federal Champions (510) and when my head is not bad it shoots almost as good as my .22 rifle at 25 yards.