It's subjective, and a matter of opinion. Some people will swear by the Colt M1911 all day long, others praise Kimber (in spite of their use of MIM internals). Personally, I'm partial to the Sig P220.
If you mean the standard Caliber of a 1911 model colt pistol,then this was chambered in the caliber .45ACP.
A Colt Lightweight Officer's Model in .45ACP caliber. It is small and light and carries seven rounds.
75-375 USD
DO NOT ATTEMPT TO DO THIS!!!!!!!!!!!!
A 22 caliber pistol holds a dose of 22 caliber ammo.
Caliber refers to the diameter of the bullet called bore. This can be measured in metric or standard For example a .45ACP in standard is 11.43x23 in metric.
You can get them at Gunbroker.com in the pistol small parts section.
Best left to a gunsmith
It is the named of the cartridge it shoots- the .45 Automatic Colt Pistol cartridge.
You will have to provide the end use for the pistol for anyone to even begin to try to answer this question. Also, your budget.
For what? Accuracy, target shooting or beasts of the forest?
This is a problem best left to a qualified gunsmith.