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.
Contact your doctor if: 1  Severe back pain makes it impossible for you to do your normal daily activities. 2  Your back pain follows significant trauma. 3  Mild back pain gets worse after a few days or persists more than a week or two. 4  Back pain is accompanied by weight loss, fever, chills or urinary symptoms.