Here's the story: Bought gun new. Used .410/.45 and .357 Rem Max barrels. Had no trouble. Then bought a 23" .22 target chamber barrel (new, unused) at a gun show. Had numerous misfires. Talked to T/C and was told to send barrel in which I did. They said they did something with the barrel lugs and to use it. If problem persisted to send in whole gun. Problem persisted but with much less frequency. At this point found a 23" 30/30 barrel and a .223 barrel. Also new and unused. Now have misfires with these also. Called T/C and was told to send whole gun in. I did. Received it back in exactly one week with note saying they replaced hammer spring, interlock safety, firing pins, and locking bolts. They claimed to have test fired it with ten rounds and had no misfires. They should have tested with an eleventh round because the first round I put in it after getting it back went "click". Now in both rimfire and centerfire modes I get misfires about 25% of the time. Those rounds that do fire on the first attempt have varying degrees of strike on the primers, going from indents that you would think should not have fired to deep pin indents. I have discovered that closing the gun with a little bit of a "snap" seems to alleviate them problem. I do not however like doing this. Any input and help withis would be grreatly appreciated. Trips to T/C for the gun cost me about $18 each and it is getting expensive. Thanks again for any help you can give.
P.s> - Do not have either a hammer extension or Pachmayer grips (of course not the grips, it"s a carbine) on this gun, both of which T/C claims to alter hammer fall.