45 long colt help

[Sharps-Nut]

I own a 45 long colt in a black hawk that is hell bent on leading the cylinder throad area, and forcing cone.  Anyone ever run in to this problem?  I made the mistake of taking it to a non revolver gunsmith and though I don't think he hurt the gun he did drain my wallet 60.00 and the problem is just a bad as it ever was.  Any advice on this topic would be appreciated.  Is ruger very open minded about working over guns to cure this or will they blame the problem on my smiths repair.  Does ruger really hold up the customer if you send one in.  I am already in fairly deep on the gun but I love the cussed little thing and hate to trade it off.

[Nobade]

Those .45 Rugers are famous for having undersized cylinder throats. Slug your bore and chambers and see what you have. My latest sheriff vaquero had .449-.450 throats and a .4515 bore. Ain't gonna work! After I opened the holes up to .452 and firelapped the constriction out of the bore where it threads into the frame, it shoots like crazy and no more leading. It was unusuable as issued. Of course after you open the throats, size your bullets so they are a tight thumb press in the throats, use good lube and don't cast them too hard. You'll be happy.