Newton's force is is 1 KG times 1 meter per second. Convert FPS to meters per second then convert bullet weight in grains to KG and multiple together.

http://m.wikihow.com/Calculate-Force


http://csep10.phys.utk.edu/astr161/lect/history/newton3laws.html




I got banned on another web site for a debate that happened on this site. That's a first