moffett018,... You have a nice Gun there ~ now to the Care & Feeding of that New Baby...<

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1) Measure the forcing cone to cylinder Gap with a feeler gage~Taurus is .004 to .008 ~Don't make it bigger...
2) Nylon Brush only~Discoloration is normal... It lets People know you use it and not just play with it...
3) Read Below to catch up on what you should have already read Below in your Taurus Manual...
4) Shooting lead bullets out that ported Barrel leads them up~its a Bitch to clean out... Shoot Copper Jackets and be happy...
Regular cleaning and use of gun oil is recommended, but no abrasives should be used on the cylinder's chambers or face. Abrasives will ruin the titanium's protective surface layer and reduce cylinder life due to excessive erosion when firing. It will also void the warranty.
You will find this in the Manual~ Better Read this...!!!
http://www.taurususa.com/pdf/manual_revolver.pdf
2) Normal care and cleaning procedures can be used on Titanium revolvers
but under no circumstances should you use any abrasive material to
clean the front face of the cylinder, or any other part of the revolver, as
the use of such an abrasive material can remove the finish on the
cylinder, which is a protective layer, and this can greatly reduce the
service life of the cylinder and the revolver.
NOTICE:
The Taurus .357 Magnum Total Titanium Revolvers (Models 617 and 627)
have been extensively tested with various .357 Magnum cartridges. We have
determined that .357 Magnum cartridges which utilize bullet weights of at
least 125 grains are perfectly suitable to be fired in your revolver.
NOTICE:
.357 Magnum cartridges with bullet weights of less than 125 grains
have resulted in cylinder face erosion and should not be utilized in your
Total Titanium revolver.