I have two of the Lyman scopes mentioned. Both are the Perma center All American type. One is a 6x which I have had for years. The newer of the two is a 10x with an adjustable objective. I've used the 6x for load developement on two lever actiona 357 marlin and a44mag marlin. Think that these scopes are way underrated. Good optics,good adjustments for elevation and windage. The 10x is going on my Canadian BSA 22 martini when I finish with the wood. Frank