Send it back to Colt for a "fix". For some reason, Colt had problems getting their small revolver barrels on right for many years.
Of course, you should shoot the revolver first to be sure the barrel wasn't installed that way to bring the gun on target.
The history of the Magnum Carry starts with the end of the Colt "D" framed revolvers like the Detective Special and Cobra revolvers in the mid-1990's.
Other than the Python, the "D" frame was the last of the old style Colt actioned revolvers going back to the 1890's.
These old style actions were intricate, complicated designs that required extensive hand fitting during assembly.
The cost of the hand labor simply priced these Colt's out of the market, and most of the old style guns had been discontinued in 1969, leaving only the Super premium Python and the various "D" frame small revolvers.
In the mid-1990's, Colt decided to replace the "D" frame with a new, simpler design, based on the Trooper Mark III/King Cobra revolvers.
This new revolver would require much less hand fitting, and would have the same transfer-bar ignition action as most modern revolvers use.
It would be made of stainless steel, and would be the basis for a whole series of small revolvers.
This new frame revolver was the "SF" (Small Frame).
The first gun in the series was the SF-VI, or Small Frame, Six Shot.
This was a .38 Special revolver.
The reason for this "catchy" name was to prevent confusion with the older Detective Special which was still in the Wholesaler/Dealer pipeline.
As soon as the last of the discontinued Detective Special revolvers were gone, Colt changed the name of the SF-VI to the DS-II, or Detective Special Two.
The SF-VI and the DS-II were .38 Special, stainless steel revolvers, mostly made with 2" barrels, with a VERY few made with 3" or 4" barrels.
There was also a bright polished version with a spurless hammer, sold as The Special Lady.
In the early 2000's, Colt introduced a new version named the Magnum Carry, and chambered in .357 Magnum.
Shortly later, Colt discontinued most revolver manufacturing, and the King Cobra and the SF framed guns like the DS-II and Magnum Carry were discontinued.
Since the Magnum Carry was only made for about one year, these guns are being hunted by both shooters wanting a powerful carry gun, AND by collectors looking for a very limited production, somewhat rare Colt.
Mechanically, the SF-VI guns are a reduced size version of the King Cobra/Anaconda.
The firing pin is frame mounted, and the revolver uses the transfer-bar system Colt developed in 1969 on the Trooper Mark III design.
This design was so good, every revolver designed since uses a virtual copy of Colt's design. Guns made by Ruger, Taurus, Dan Wesson and others use Colt's system.
Unusually, the SF guns DO NOT use a coil spring to power the hammer.
The SF guns actually use the same "Vee" leaf spring that Colt used on the older "D" framed guns.
The only difference is, the lower leg of the Vee spring serves no function other than to tension the spring. The upper leg powers the hammer.
Size-wise, the SF guns are virtual duplicate of the older "D" frame guns, and holsters and grips "USUALLY" will fit, although there are some differences due to polishing and the extra 1/4" of barrel length.