Have a Hornady 7th edition reload manual (older) and it lists loads for the 243 Winchester in 24" barrels. What is the velocity difference between a 22' and the 24" approx? Seems have read a while back the difference, but cannot remember. Don't have a chronograph so need some help. Bullet in question is the Hornady 100 gr. BTSP # 2453 using H4350. Thanks.
