Strengthen a main spring..

[tallpine]

Or leather.

This is actually a period correct fix, I once examined an old original caplock that had a thick piece of leather jammed into the mainspring, looked like it had been in there a very long time. If nothing else it would be a good way to find out if in fact your mainspring is the problem.

 

[toot]

The Gun Works in Oregon lists new CVA mainsprings for $7.90
Phone: (541) 741-4118

I bought a sear spring from them, SPOT ON!! great people to deal with1

 

[toot]

Or leather.

I have used both at different times, but it is a BAND AID ON CANCER. it is TERMINAL!

 

[ohio ramrod]

A flattened nipple will prevent the caps from firing properly. I recomend you check your nipple, it should have a sharp edge nipples can be replaced or "sharpened easier than springs can be replaced.

 

[J. Paul]

I have a CVA 45 Kentucky pistol assembled in the mid 70's that would fire if held hammer back with thumb and released it but not by pulling trigger. About 1/4" more travel of hammer made the difference. A knowledgeable friend suggested a hardwood wedge inside "V" of spring as a fix. It worked and has for almost 40 years now.

 

[Kansas Kid]

I would think heating and re-arching the spring followed by re-hardening and tempering.