locking up

[turnin fool]

I need some help.  Took my Schofield out to a match Sunday and on the second stage it locked up in half cock.  On the next stage I got off the first shot and it stuck came free and at full cock the cylinder was not locking up.  I kept working with it and got all five to fire.  Then I fixed the problem, I put it up and got out the Ruger. 
I was not riding the trigger learned about that the hard way.  Any suggestions???  Also need the name of a good Schofield gunsmith, I love the gun and intend to get more of them but I don't want any more 120 second stages.  Plans are to take it apart and give it a good cleaning and lub and see how it does this weekin.
All suggestions welcome!!!
Dave

[Silver_Rings]

As Joss said, it could be alot of things.  If it has worked fine it the past it could be something as simple as high primers.  I have learned the hard way to always spin the cylinder after loading the 5 rounds to be sure it doesn't hang up on a high primer.  I use the rounds that have the high primers in my rifle as it doesn't care.

If you have more than one and you take them a part at the same time make sure you do NOT put the wrong cylinder in the wrong pistol.  I did and now that pistol is prone to having problems cycling from time to time.  I haven't gotten around to trying to fix it yet, only been a year now. 

SR