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.
Anyone can develop back pain, even children and teens. Research has yet to prove what contributes to back pain. However, these factors might put you at greater risk of developing back pain: Age. Back pain is more common as you get older, starting around age 30 or 40. Lack of exercise. Weak, unused muscles in your back might lead to back pain. Excess weight. Carrying too much weight puts extra stress on your back. Diseases. Some types of arthritis and cancer can contribute to back pain. Improper lifting.