Several months ago, I saw an announcement that Burris was now offering a high powered variable for long range shooting such as the popular F-Class. I contacted Burris and asked if they had any for testing and the answer was that they would have some available in May or June. I received mine on D-Day (June 6th). The model that I received is XTRII 8X-40X-50MM with a 34 mm tube. It features a reticle called F-Class MOA.
Not since 1971 have I used a first focal plane scope, but there are reticles now available that remove many of the negative aspects of this design. Since the hash marks subtend the same distance regardless of power setting, one can use the reticle as a range finder at any power. Of course the reticle is magnified as the power is turned up and vice versa. This reticle features 1/2 MOA hash marks and has a second horizontal "crosshair" that is 20 MOA below the primary one. This allows one 20 extra MOA for shots that can't be dialed. (see picture above)