noun
Etymology: gain (V)
: a twist that is more rapid at the muzzle of a firearm than at the breech in order to increase gradually the rapidity of rotation of a projectile
noun
Etymology: gain (V)
: a twist that is more rapid at the muzzle of a firearm than at the breech in order to increase gradually the rapidity of rotation of a projectile
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012