<P> In a non-sporting context, bolt - action rifles chambered for the . 243 were utilized by the Los Angeles Police Department's special weapons And tactics (SWAT) unit during its early years . A specialist 115 grain projectile can move up to 3,150 fps from a 28 - inch barrel, or over 3,000 fps from a 26 - inch barrel . </P> <P> P.O. Ackley created an improved version of this cartridge called the . 243 Winchester Improved (Ackley). Like other improved cartridges, this created a steeper shoulder and blew the sides out, giving about 10% more powder capacity, and some small improvement in velocity . Both versions of the . 243 cartridge are good for hunting deer . </P> <P> The . 243 produces a velocity of 2,960 feet (902.21 m) per second with a 100 - grain (6.6 gram) projectile from a 24 - inch (610 mm) barrel . Commercially loaded . 243 ammunition is available with bullet weights ranging from 55 grains (3.6 g) up to 115 grains (6.8 g). Twist rate of the barrel is the major deciding factor in 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 and bullets heavier than 100 grs., a 1: 8 or 1: 7 (for 115 - gr . VLD bullets) is necessary . </P> <Table> <Tr> <Th> Some 243 Winchester cartridges (circle size proportional to recoil) </Th> </Tr> <Tr> <Td> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> Game class vs 6 in maximum point blank range </Td> </Tr> </Table> <Table> <Tr> <Td> </Td> </Tr> <Tr> <Td> Sectional density vs ballistic coefficient </Td> </Tr> </Table> </Td> </Tr> </Table>

How many feet per second does a 243 shoot