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.
Any one of these can cause pain in your lower back. Kidney infections can also cause your back to feel the brunt. Other issues: Low back pain can also happen because of things like: Kidney stones. Endometriosis, a buildup of uterine tissue outside the uterus. Fibromyalgia, a condition that causes widespread muscle pain.