34 Pa.C.S. § 2507
(a) General rule.— It is unlawful for any person during the open season for the taking of any big game other than turkey to:
(b) Exceptions.— This section shall not be construed to apply in any manner to:
(4) Shooting at a properly constructed target or mark or a dead tree protected by a natural or artificial barrier so that the ball, bullet or arrow cannot travel more than 15 yards beyond the target aimed at, after making due allowance for deflection in any direction not to exceed an angle of 45 degrees. Target shooting shall only be lawful when it is done: