It depends on the gun, but usually 5 or 6.
44 special and 44 magnum only
From the .44 Magnum article on answers.com, "Despite the ".44" designation, all guns chambered for the .44 Magnum case, and its parent case, the http://www.answers.com/topic/44-special, use bullets of approximately 0.429in. (10.9 mm) in diameter.http://www.answers.com/topic/44-magnum#cite_note-lyman-3"
Yes
There ARE rifles and revolvers chambered for the 44 magnum cartridge. If the weapon is marked ".44 Magnum" then it can be used in that weapon. You should know that there are other .44 caliber catridges, and THOSE weapons (44 Special, 44-40, etc) cannot use 44 magnum loads.
Gun shows, gun shops, online retailers.
.44 Long? Check your cartridge again. As for your question, whatever you have, I'm almost 100% certain it won't be compatible with a .44 Magnum firearm. The only cartridge backwards compatible with the .44 Magnum is the .44 Special, and even that has limitations. .44 Special can be fired in a .44 Magnum revolver, but you need to check with the manufacturer before attempting this with a rifle, as the rifle will have a headspaced chamber.
one from a 44. magnum, or two from a 357. magnum, or six from a 38 special. Provideing of course one hits the vital organs.
Most weigh ABOUT 240 grains, but can be more or less.
The StG-44 used a 30-round detachable box clip. The rounds were 7.92mm.
.44 Magnum
BULLETS are the metal projectile- the thing that comes out of the barrel- and contain no powder. The entire round of ammo is a CARTRIDGE (case, primer, powder, bullet). And there is no one answer for a .44 magnum cartridge- powder charge will vary, depending on WHICH powder is used, and which weight of bullet.
In a .44 Magnum revolver, yes. In a semi-automatic .44 Magnum (such as the Desert Eagle), no.