Help with valve lapping vs grinding compound

slushee

slushee

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So my local Cambodian Tire is trying to tell me that their "Valve Grinding Compound" is the same as the "Valve Lapping Compound" I've been told by Hungry to buy to help smooth out a trigger pull.

I am afraid their "grinding" compound might be a bit too coarse .. or is that stuff really what I'm looking for?
 
What kind of trigger?

In 40 years of gunsmithing I have never "lapped" a trigger... never heard of it being done... I am curious...
 
guntech said:
What kind of trigger?

In 40 years of gunsmithing I have never "lapped" a trigger... never heard of it being done... I am curious...
Click to expand...

Its a very light lapping for the Norinco M14 trigger. Their is a small 'hook' as best I can describe it, and when u gently pull the trigger while the trigger group is out, you can see this hook slide off of its rest. By putting this compound on the hook and rest surfaces and gently pull the trigger until it is about to release but then stop, and do it again, it will smooth out this creep.

I think it was 300 pulls with this compound and then clean it all off, and your pull will be much smoother. Its the only thing that should be done to the M14 trigger group.

Hope that helps. If you would like, I could take some pics (once I russle up a camera) that would make the above much more clear.
 
It seems slow but it may workout... I guess that is why I have a box of various shaped fine India and hard Arkansas stones ... :D
 
Stones are great , as long as you are careful not to remove too much material or reshape anything.I smoothed out a hitch in my S&W model 10 trigger with a small fine stone, and a little patience.All it required was removing a few tiny burrs, and it is now a smooth consistent pull throughout the full range of motion in double action.
However, if one isn't careful to keep the stone parallel, and/or square to the parts being worked, your trigger could be ruined, or rendered unsafe.There is almost no danger of this happening using the lapping compound method.
Just my $.02
Scott
 
When I asked Hungry recommended 800 grit.

The Permatex valve grinding compound that Canadian Tire carries is much coarser than this.
 
RR said:
Dennis
Can you smooth out an 88 Win?
Click to expand...

I did a few in the past. The triggers on 88's and 100's are probably the hardest to work on... and I don't try to do either anymore as parts are not available... and if you screw up the trigger trying, you don't have a rifle...
 
Aklands can get you 800 grit compound. I was surprised at the Edmonton M14clinic, how big a difference it made to smooth out the trigger first stage. A little dab of compound on the hammer hooks and spent an hour or two working the first stage back and forth, and you get a nice smooth trigger. I wouldn't screw around using a stone for that application. :)
 
guntech said:
I did a few in the past. The triggers on 88's and 100's are probably the hardest to work on... and I don't try to do either anymore as parts are not available... and if you screw up the trigger trying, you don't have a rifle...
Click to expand...

Worse to fix than a BLR trigger?
I'd like to pick up a BLR but not until I can find someone to fix the trigger.
Been having a lot of trouble. When it comes to fixing/tuning them most people seem to steer as far away from them as possible.
 
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