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 pain is more common in people who are not fit. Being overweight. A diet high in calories and fat can make you gain weight. Too much weight can stress the back and cause pain. Heredity. Genes play a role in some causes of back pain, such as certain types of arthritis. Other diseases. Some types of arthritis and cancer can cause back pain. Your job. If you have to lift, push, or pull while twisting your spine, you may get back pain. If you work at a desk all day and do not sit up straight, you may also get back pain. Smoking.