I'm sure there are reasons, but today a lot of the mindset for handgunners is to shoot as fast as possible and put as many rounds on target as it takes and most focus on the ancient 9x19 and a good number consider anything more powerful to take away from that ability to put rounds on target....odd, I know.
I've played around with loading .45 Super hot, making it a 460 Rowland but that's really only a handloaders proposition, since the external dimensions are the same as the .45 ACP, if one found its way into an old .45 the results could be nasty, so I can see why although very good, cartridges like the 45 Super don't really ever take off and wouldn't, they're too big a liability for the big ammo makers.
I'm not sure why there isn't a 44 caliber modern semi auto self defense cartridge, I mean I do based on todays shooters, I can hear them screaming "too much recoil", but a .429" semi auto round that has the same general OAL of the .45 and 10mm but more powerful, at least potentially, than both with capacity in between the two would be great... but it doesn't exist for some reason. Also something like a 9x23 but running actual .357" bullets instead of 9mm bullets, you'd have good power and 9mm like capacity.
I've played around with loading .45 Super hot, making it a 460 Rowland but that's really only a handloaders proposition, since the external dimensions are the same as the .45 ACP, if one found its way into an old .45 the results could be nasty, so I can see why although very good, cartridges like the 45 Super don't really ever take off and wouldn't, they're too big a liability for the big ammo makers.
I'm not sure why there isn't a 44 caliber modern semi auto self defense cartridge, I mean I do based on todays shooters, I can hear them screaming "too much recoil", but a .429" semi auto round that has the same general OAL of the .45 and 10mm but more powerful, at least potentially, than both with capacity in between the two would be great... but it doesn't exist for some reason. Also something like a 9x23 but running actual .357" bullets instead of 9mm bullets, you'd have good power and 9mm like capacity.