Hello everyone, 

I recently replaced the coil spring on my Uberti Low wall and when I got it back together had a problem with the half-cock. When the rifle was upside down in the gun vise, as I was inserting the breechblock, everything worked fine. I put the forearm back on and thought I was done but noticed that with the rifle in the "upright" position the hammer would not always go to the half-cock position when the action was closed. If I turn the rifle over it works every time. If I hold it upright, it works sometimes but not always. 
Is this a safety issue? I might just decide to live with it, I have to cock the rifle for each shot anyway. 
I suspect the fly is a little sticky, I put a drop of light oil on it when I re-assembled it (did not remove the fly). 
Is it possible there is some other cause?
Any suggestions would be appreciated!
Thanks!
Joe S

+1 to the above comment.

Flush it out with Naptha (lighter fluid); it will remove the oil and leave a light (and dry) amount of lube.  When I scored IBS Benchrest Matches, that's what all the guys shooting 10 pound .308s with 2-OUNCE triggers used to clean their triggers.

It's all I use on triggers, and I even got an old 8-Bell Ship's Clock keeping time again -- after 50 years -- by flushing it out with Gumout first, then flushing it with Naptha (to leave the light dry-lube coating).

Old No7