Just purchased a Schmidt and Bender 3-12x50 Scope, 1st Focal Plane. Mounted the scope on my favorite hunting rifle a Ruger No. 1 in 7x57. After a dozen shots I realized I was in trouble, there was not enough vertical adjustment. After adjusting the dial all the way possible, the rifle shot a half inch to the left. Called the American service department for Schmidt & Bender located in Pennsylvania and explained the problem. Long story short, I was advised that a first focal plane scope has only one third the overall adjustment range in comparison to a 2nd focal plane. I was advised that the problem was the rail on my rifle, that it wasn't aligned properly and that I'd have to take it to a gunsmith. Strange, the Leupold scope I'd had on my rifle previously had no problem sighting in. The other option was to purchase a special brand of rings for the Ruger No. 1, with a price tag of $450.00. I know a lot of people that won't pay $450.00 for a scope let alone for rings. Something is wrong when you pay over $2,000 for a scope and you find out it lacks the adjustment range to properly sight the scope in.