Well, because the ballistic coefficient of a BPC bullet is very low when compared to modern ammunition (.380 to about .420), wind drift is a major concern. Let s take a look at just how much wind can affect the flight of the bullet when it is blowing at 5, 10, 15, and 20 miles per hour.
Inflammation of the joints (arthritis) of the spine sometimes causes back pain. Osteoarthritis is the common form of arthritis and usually occurs in older people. Ankylosing spondylitis is another form of arthritis that can occur in young adults and which causes pain and stiffness in the lower back.
Back cramps can be painful and debilitating, and can be caused by a number of different things. Injury to the back, such as a pulled muscle, is one of the most common causes of back cramps. Poor posture, overexertion through exercise, improper lifting methods, or even menstrual cramps can all cause back pain as well, however, in addition to issues with the vertebrates of the spine. The most common cause of back cramps is physical injury.