室内手枪比赛距离就是50尺。 原房主显然对这点很明白。 他设计房子时，把shooting
range的长度做成53尺，留三尺给人。
Outdoor competitions are typically fired at 50 yards (slow fire) and 25
yards (Timed & Rapid Fire) using the same target. A "short course" will
shoot only at 25 yards and use a reduced-size target for the Slow Fire
segment. All courses of fire at an indoor competition are typically fired at
50 feet with appropriately scaled targets. http://www.scgaa.org/cmp.htm
