In all likelhood, one of the bolt action pistols in a rifle caliber, such as 6mm. That holds the accuracy record for a rifle, and would likely do so for a pistol.
The most accurate handgun is the CZ 75 SP-01 and it retails at around $600 - $700.
Either the SIG or S&W
A VERY good handgun- for most puposes. Durable, reliable, accurate, and powerful.
It depends on the model, but most handguns are meant for short to medium range conflict.
double (or, on some platforms, long double)
The accurate range of a bullet depends on factors such as the type of firearm and bullet used, weather conditions, and the skill of the shooter. Typically, most handgun bullets have an effective range of up to 50-100 yards, while rifle bullets can be accurate up to several hundred yards or even over a mile for some high-powered rifles.
Handgun - 38 special Long gun - 12 gauge
Rifle, shotgun, or handgun? The 10 gauge shotgun at close range would be very high on the list, as would some of the buffalo rifle cartridges, such as the 45-110. The .45 Colt revolver was possibly the most powerful handgun of the day.
Depends on the firearm, what you are shooting, and where you are. With a rifle, firing from a supported position, such as a benchrest is the most accurate. In the field, the prone position is most accurate. However, that does not work well if you are in waist deep grass, or duck hunting with a shotgun. With a handgun, a two handed shooting stance is most accurate, and using a support makes that better.
No
A water pistol.
Handgun