Very Hard trigger

[Britsmoothy]

When the mainspring goes down to far into the mortise, it JAMS up on the wood and doesn't allow free movement of the tumbler, which means the trigger pull is much harder to pull until the sear clears the tumbler.

Gus

When the lock is cocked the main spring will not be in the stock wood!

 

[Artificer]

When the lock is cocked the main spring will not be in the stock wood!

Well, you are correct it shouldn't be hitting when cocked, BUT the stirrup looks like it would still allow the mainspring to go low enough when cocked to hit the wood, which was why I suggested that might be what was happening.

Gus

 

[Phil Coffins]

Or do you mean to deep, the inletting maybe as poor as the lock and parts rubbing all along their movement.

 

[Curley 50 cal]

Sounds like the sear screw is loctited in. Some heat will break it down to allow removal.

I WILL TRY TO RELEASE IT WITH HEAT

 

[Joemolf]

I’m no expert, but here is my experience with this issue. I inherited an old CVA Hawken with the same problem, but with double triggers. I tore the lock apart and polished every part. No dice, didn’t help. I have revisited it several times and have finally decided that the lock and trigger mechanism are not aligned properly. Only thing I could come up with and I’m not going to attempt a major overhaul on that old rifle. Hopefully one the experts here will chime in and give a better answer. If they do maybe we’ll both benefit.

The sear release being set to far from the trigger pivot point is typical of a heavy trigger

 

[Stantheman86]

If you can shoot tight groups with that trigger , then you'll be a crack shot with other rifles