Complex sentence: Low bullet weight and the straight line layout of the rifle reduced recoil and the high velocity of the round gave it an almost flat trajectory out to 300 meters (1000 feet), which was also the limit of its effective range.
Split into simpler sentences: Low bullet weight and the straight line layout of the rifle reduced recoil. The high velocity of the round gave it an almost flat trajectory out to 300 meters (1000 feet), which was also the limit of its effective range.