GB is right, you need long eye relief scope on a # 1, however Ruger extension Rings help out, by getting the scope back. I have BL 4000 2.5-10x on my 6mm Ruger #1 Now to answer question on about 4200 scopes. I have 5 BL elite scopes, Their great scopes, a little heavy & long but over all a very well built scope, that cost less then a Leuplod VX-!!!
I have two 2.5-10x,4-16x, 1.5-6x all 4000 or 4200 and one 3000 scope a 4-12x. I would buy them all over agin except the 4-12x 3000. That scope get a little hazy around the edges at 12x.
I think the best scope for a #1 in 416 cal. would be a Vx-!!! 1.5-5X OR if like more power a VX-!! 3-9x shotgun scope, wicked eye-relief on the shotgun scope.