Had a chance to shoot the new 600 yard F-Class target. Very interesting. It retains the same 6" 10 ring, but the 3" diameter "X" ring is replaced by a triangle. The equalateral triangle measures 3.75 inches per side and is placed in the center of the 10 ring. This results in an area reduction of about 20 percent from the 3 inch circle. To distingish scores from the old target, a perfect 20 shot score will now be 200-20T. It also adds a bit of strategy. A slightly lower aiming point to maximize your T's, may cost you a 10, should it drop out the bottom. Should be fun.