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.
Inflammatory diseases of the spine â similar to rheumatoid arthritis -- will cause stiffness, difficulty moving and pain in the back. And of course injuries to the spine may result in back pain â at the time of the injury or later in life. When your back hurts but itâs not the spine. The following conditions are other potential sources of back pain. Note that many are extremely rare, or occur in conjunction with other obvious symptoms. As always, check in with your doctor about any new experience of severe back pain.