what's the difference between 44 mag and 44 special
.44 Magnum The .44 Magnum is based on a lengthened .44 Special case, loaded to higher pressures for greater velocity (and thus, energy). The .44 Magnum has since been eclipsed in power by the .454 Casull, and most recently by the .460 S&W Magnum and .500 S&W Magnum, among others; nevertheless, it has remained one of the most popular commercial large-bore magnum cartridges.[4][5] When loaded to its maximum and with heavy, deeply penetrating bullets, the .44 Magnum cartridge is suitable for short-range hunting of all North American gameâ€”though at the cost of heavy recoil and muzzle flash when fired in handguns, less so in carbines and rifles.[6]
.243 Winchester 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.