larger and heavier rounds, but monolithic copper .243 ammunition weighing as little as negates this characteristic and causes adequate penetration and blood trails through even larger-bodied medium game like wild hogs. The .243 produces a velocity of per second from factory-loaded expanding monolithic copper projectiles weighing fired from a barrel. Other variations of commercially loaded .243 ammunition are available with bullet weights ranging from 55 grains (3.6 g) up to 115 grains (6.8 g). Twist rate of the barrel can sometimes be a factor in deciding which bullets to use, 1:10 being the most popular as it is sufficient to stabilize up to 100 gr bullets. However, for very low drag-profile or bullets heavier than 100 gr, a 1:8 or 1:7 (for 115 gr VLD bullets) is necessary. See also 6 mm caliber 6mm Optimum 6mm Remington List of firearms List of rifle cartridges Table of handgun and rifle cartridges .243 Winchester Super Short Magnum .308 Winchester Delta L problem Sectional density References External links .243 Winchester Cartridge Guide by AccurateShooter.com Cartridge Dimensions 243 Winchester 243 Winchester