Go to the below linked site for answer to your question. The material is copyrighted.
100-1000 USD
100-1000 USD or so.
50-500 USD depending on specifics
A 44 MAG IS MEASURED IN thousandths OF AN INCH, .44 IS THE ACTUAL BORE, NOT METRIC
200-700 USD or so
50-1000 USD depending on specifics
Go to Wikipedia.com and look up the cartridges. They will tell you the ballistics and everything you need to know about the two cartridges. You will see the 500 Magnum is worlds away from the 44 magnum!
Yes
A few hundred to a thousand depending on condition and if the barrel is in fact 8" and came from the factory that way. Only way to know is to get it lettered.
100-700 USD or so
your colt is of modern manufacture period. it will take the 44 mag. cartridge 'IF' the barrel has 44 mag. written on it. Or, it could be a 44 special, also written, whereby you cannot use 44 Mag. cartridge. However, if it is a 44 mag. cartridge, then you can shoot modern 44 mag. cartridges OR 44 special cartridges............
500-1000