"Average" is a matter of opinion, and probably impossible to define. In regards to "regular" magazines, some 1911 style .45 pistol magazines hold 7 cartridges, some hold 8. Some 9mm pistol magazines hold 7 or 8, some hold as many as 16, many hold 10. Some .40 caliber pistol magazines hold 8 or 10, some hold 15. Then there are other calibers, and they all hold various numbers. During the notorious assault weapons ban, newly manufactured magazines in the U.S. were limited to 10 rounds, and because of that, some people consider 10 rounds to be average or they consider more than 10 rounds to be "hi capacity," but neither one of those is really correct.
None. No such gun.
up to 20
6, IIRC
It depends on the pistol make and model, and what it is chambered for. Most semi-autos nowadays hold at least 12 rounds. Most revolvers hold six.
What model?
the semi-automatic 45 pistol holds seven rounds in the magazine and one in the chamber
Depends on the pistol. I have one that holds ONE cartridge, ones that hold 2, 4, 5, 6, 7, 9, 10, and 13 cartridges. There is no one answer, because there is no one pistol.
That number of rounds can vary. Most of us are familiar with revolvers that hold six rounds. Some pistol magazines can hold up to 13 and more. I know of one revolver with a cylinder that holds nine rounds.
How many bullets can a 9mm baretta hold
It all depends on the model. Daisy made one that held 100 BB once.
9mm is a caliber, meaning a 9mm pistol is a pistol usually using the 9x19mm parabellum round. Therefore there is no exact number. A popular exampleof a 9mm pistol is the M9 handpistol, with a magazine size of 15 bullets, other pistols involves the CZ_75 holding approx 12 bullets to 20. depening on other calibers it holds. The pistol with most round are the ES Five Seven with a amzimum of about 30 bullets, while deringers (small one time use mini hand guns) can hold only 1 or 2 rounds.
One