Colt
44 Colt not produced since 1940. Less than half the energy of the 44-40 44-40 still in production.
45 colt
Colt
Samuel Colt invented the Colt pistol!
Samuel colt
1500 USD or so
Colt data is at Proofhouse.com
No. If it will even fit (the rim of a 44 magnum cartridge is much larger than a 45 Colt) it would be very dangerous to do. 45 Colt firearms were not designed for the forces of a 44 Magnum cartridge.
He invented the Colt pistol.
The 44 caliber Colt Army Model 1860 revolver began production in 1860 and was made until 1873
One of many patent dates that Colt had.
Samuel Colt invented it in 1836