What's the approximate eye relief on that scope you are using? The stock I am using is a standard A2 stock. Scope is a Bushnell 4200 6-24x50. The rifle has a built in riser on the flat top. I am currently using low 30mm rings, but find the eye relief is wrong and it makes shooting awkward. I'm always hunting around for the right head position, which is too far back when prone. Makes me really have to crank my head into an awkward upright position.