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.
People often assume that their back pain is caused by overdoing an activity, such as weight training, gardening, or work that requires a lot of digging, lifting or twisting. However, there are many causes of back pain. Fortunately, most causes are not as serious as a heart attack. Other causes include: Back muscle spasm, sprain or strain due to overuse or injury. Degenerative disc disease is a breakdown of your spinal discs that cushion your spine.