Try single action & see if the problem goes away. If it does then primer hardness is probably the issue.

If it doesn't then try backing the grip screw off 1~2 turns & see if that fixes it. If it does you can either shorten the screw or put a couple of washers under the head.

If its neither then we can go on from there with replacement springs & so on.

GARY ROTH said
How do I remove/replace the firing pin?  

 

I recently purchased a 15-2 (Monson) revolver which looked to be about 90%.  At the range I too experienced light hits and FTF that others on the site have discussed (except when using American Federal ammo.)

 

I have replaced the main spring twice - once from EWK and the second time from Numrich. The EWK did not solve the problem.  The Numrich is substantially shorter than the EWK but seems stiffer.  I also replaced the Hammer return spring also from Numrich.  Range time in a few days to see if this helps.  I also purchased a replacement firing pin and spring from Numrich, but I can't figure out how to remove the old one and replace it.  I am told there is a pin on the frame that a 1/16th punch will remove (and purchased the replacement pin) but cannot find it.  Can anyone assist?  Thank you. 

 

I had a very similar light strike problem in double action mode with my 714 Dan Wesson. I also ordered a few replacement firing pins from Numrich, and tried replacing the firing pin hoping to fix the issue.

Here is a picture showing the roll pin location (circled in red) that you need to remove to take out the firing pin. It is above the upper screw on the side plate.

The firing pin also has a spring, make sure that you put the spring on in the correct direction. Also check the firing pin and channel for any burrs or spots where it could possibly hang up, clean it well while you have the firing pin out, and do not over oil the area as it will just attract more crud. This is also a good time to replace the firing pin spring since you should have a spare from the EWK small parts kit.

I ordered two replacement firing pins from Numrich, and I modified one by removing some of the firing pin base stop bushing. I was worried that I did not have enough firing pin depth or protrusion and thinking that might have been why I had my light strike problems in double action mode.

(rough example drawn out below)

After trying out the modified firing pin, I could see that pin depth or protrusion was not my problem. I still occasionally got the light firing pin strikes in double action with my Dan Wesson even with the longer firing pin installed.

Since I had ordered a EWK parts kit, and a Wolf Spring set as well for the Dan. I performed the average Joe tune up on my gun and started swapping around main springs.

https://www.danwessonforum.com/forum/reloading/tuning-up-your-15-2-the-average-joe-method/

During this tear down to replace the main spring I noticed that the spring in my Dan Wesson had been cut shorter by quite a few coils in an attempt to improve the trigger feel. It was MUCH weaker than the lightest Wolf spring I had due to this.

I replaced the mainspring with the first spring I had on hand, a 7.5 lb Wolf spring. I noticed I did not get quite as many light strikes in double action mode as I did before, but it was still happening occasionally. I had been using Winchester USA white box 38 special as my baseline for most of this, so I kept using it for all of the rest of my testing.

I planned to try a heavier main spring, as things had gotten better after adding the 7.5 lb spring.

I had taken the Dan apart a few times at this point and gotten pretty familiar with all the internals. This time while it was all apart, I polished up everything inside and replaced all the small parts and springs from the EWK kit. Thanks again to the Average Joe Tune Up.

I went up to the next heavier spring, an 8 lb Wolf spring and things worked even better still. (fewer light strikes, but 1-2 in a 100 rounds was still too many for me)

I could not find a source for a 9-10 lb factory rate spring from any of the usual suspects. All Wolf seemed to carry were the reduced power springs for better trigger feel, so I called CZ-USA/Dan Wesson. They were very nice on the phone, and sold me a factory weight 9 lb main/hammer spring for my 714.

After cleaning up all the internals and polishing them lightly, and adding the 9 lb spring, my gun actually felt better than with the cut spring installed.

The factory Dan Wesson 9lb spring worked like a champ, and it cleared up ALL of my light strike issues in double action mode. I know it sounds odd, but my Dan is actually more accurate as well with the heavier spring installed than with the cut spring. It has been 100% reliable ever since with factory ammunition, and my hand loads. (including CCI primers)

Not saying this is your exact problem, Just relating some of what I went through trying to find my light strike issues in hopes that it may help you as well. I feel so much more comfortable with the internals of my Dan after all this, and I have really come to appreciate the simplicity of the gun.

 

- Bullwolf

i am so sorry  and feel really dumb for asking but on my gun,  I can't see anything in the hole circled in red; If there is a pin, what size punch do i need to pull the pin out?  

Thanks  the grip on the gun is rubber, but of course it is off the gun when disassembled.  we tried the 1/16th punch but didn't get far and were afraid of damaging the gun .  a paper clip will pass through the hole without touching anything.   I have the proper tools, 1/16 punch, brass hammer and composite backing but am hesitant to bang away at what  i can't see.