Heat treating the trigger bar
 

On my original shooter the metal in the trigger bar in the area of the sear is rolling up where it contacts the firing pin. This happened about 50 shots ago. I stoned the burr down, but it is now back. The metal can be cut with a file so this time I plan on re-hardening it with kasenit and quenching in oil. I have 2 questions. Should I draw the temper after the kasenit? Also any ideas on why this happened? The firing pin looks good, and as far as I know the firing pin spring is original. I have some spring stock and could try a lightened spring if you think that would help.

Yes,
you should draw after quench. How much is another question!
I'd go to about 350 degrees, or right at bright blue-blue.

Why- probably not done right the first time, but not fired much before you got it; or fired a lot and just wore through the surface hardening.

The lightest spring that gives you sure ignition would be optimal, just keep it original length.

Not much down side to doing this, you can always replace the sear bar on a shooter.

All JMHO.

Do you have a picture of the 'trigger bar' with the rolled up metal???

It would be most instructive for members who may have this occurrence in the future... :thumbup:

No I don't have the ability to sent pictures..... Too long in the teeth I guess. Just not a computer person.

Thanks DonVoigt,

I went ahead and used kasenit and drew the temper. Since then have put around 75 rounds thru it with no sigh of problems.