KEEP IN MIND..... A 22 centerfire is a very powerful load, and its pretty doubtful that very many people on this forum has even seen a true 22 centerfire. They stopped being a mainstream gun in the mid 1930's, they shot a 45 to 50 grain bullet, at barrel speeds anywhere from 3000fps, to 3700fps, very similar to a modern .223, just a hair slower, and about 5 grains less lead. It is a pretty rare find to even be able to locate a reloadable shell, and as far as I know, Mainstream gun sales havnt offered the ammo since the late 50's or early 60's. fifty years from now they will be arguing about a .17 being a rifle, or an air-rifle caliber.