Nelson .22 Conversion Unit and light strikes?

[Rangeman]

Lately, some light strikes. Using different ammo, problem continues. I clean it after every use. (a dental pick is used to remove the crud too) Also, I make sure take down rod is tight.
Firing pin looks to be in good shape. Fired brass casings barely have a mark on them. Any ideas what I should look for or why I'm getting these light strikes?
Thanks.....

 

[Rangeman]

Could it be the mainspring in the platform? The trigger pull is very light, but the last time I shot .45 no problem. Next time I shoot .45 I'll look at the dents.

 

[Trigger Time]

Sounds like that very likely could be the problem. You could pick up a cheap GI style MSH with a standard mainspring from Sarco and swap it out when you want to shoot 22.
For the price of those Nelson conversions, I would think that they could help you out with that.

 

[Rangeman]

Sounds like that very likely could be the problem. You could pick up a cheap GI style MSH with a standard mainspring from Sarco and swap it out when you want to shoot 22.
For the price of those Nelson conversions, I would think that they could help you out with that.

I have contacted them twice (couple months ago and last week) to see if they had any ideas what to look for. So far, I have not heard from them. Because the .45 1911 was bought back in the 90's, and the conversion unit has a low round count, now I'm thinking it could be the mainspring?
So, no response from them to my e-mail, and maybe mainspring replacement?

 

[Magnumite]

Not on a Nelson, but with a Ceiner, I was getting misfires after several thousand rounds of fire. Same as you are. Replaced the mainspring with a new identical force one and the misfires went bye-bye.

As a note, I use a considerably lighter than stock mainspring to enhance cycling reliability. The lighter mainspring offers less cocking resistance thus enhances slide speed.

 

[Rangeman]

Got the mainspring and is in gun. I want to put the final pin through, but I can see the mainspring cap in the way. Light taps and nothing happens. Dumb question: if I force the pin through the hole, am I going to break something. As the mainspring housing is received, I can see this cap blocking the way. Just want to be sure. Thanks...

 

[Magnumite]

yes. You need to stablize the the bottom of the mainspring housing. Start the retaining pin just enough to keep from falling out of the housing. While doing this, you need to compress the spring in themainspring housing by pushing on the spring seat down with a punch then push in on the retaining pin until it is flush with the back of the mainspring housing..

 

[Rangeman]

yes. You need to stablize the the bottom of the mainspring housing. Start the retaining pin just enough to keep from falling out of the housing. While doing this, you need to compress the spring in themainspring housing by pushing on the spring seat down with a punch then push in on the retaining pin until it is flush with the back of the mainspring housing..

That worked. Thank You Magnumite!
After next Range trip I will follow-up. Hopefully, light-strikes no more....

 

[Magnumite]

keep my fingers crossed for ya!

 

[Rangeman]

With new mainspring, I test fired that platform with my Nelson.
Too many light- strikes

Another member/friend suggested trying the Nelson on one of his platforms. Today, I shot 200 rounds through his and zero light-strikes.
Problem is with Kimber platform, but have no idea what?

 

[Rangeman]

With new mainspring, I test fired that platform with my Nelson.
Too many light- strikes

Another member/friend suggested trying the Nelson on one of his platforms. Today, I shot 200 rounds through his and zero light-strikes.
Problem is with Kimber platform, but have no idea what?

Also today, shot a box of .45 through my Kimber and no light-strikes.

 

[Magnumite]

Long shot, is this a kimber with Swartz type safety? If so the plunger in the frame maybe pushing up on your Nelson slide.

Is the hammer nipping sear during hammer fall?

Is the hammer nipping the hammer cutout in the frame?

 

[Rangeman]

I think the answer to above 3 is no. I replaced with same mainspring (23 lbs).
It worked perfectly with original for about 2K rounds.
Adding to the mystery: when used on another platform (which shot 200 rounds no light-strikes) the dents made by the firing pins looked the same.
Have tried 3 different CCI lot #'s. But same ammo worked no issues in other platform.

 

[Magnumite]

Is the slide going all the way into battery? If it is just a tiny bit back that will fissipate some of the hammer’s energy pushing the slide forward and not into igniting the primer.

 

[Rangeman]

Is the slide going all the way into battery? If it is just a tiny bit back that will fissipate some of the hammer’s energy pushing the slide forward and not into igniting the primer.

I will be cleaning it soon and look at that too....

 

[Rangeman]

Is the slide going all the way into battery? If it is just a tiny bit back that will fissipate some of the hammer’s energy pushing the slide forward and not into igniting the primer.

Apparently not.
I called Nelson today and spoke with Larry who was very friendly and helpful. He had me take apart the Unit, and with the slide only (no barrel blocking view) step by step I looked for anything rubbing or slowing the slide, as well as wear marks. He explained that the energy of a .22 is not the same as a .45, so it doesn't take much to keep slide from going completely forward as needed. Included in the inspection I watched the slide move over the ejector, but at the time did not see a problem.
After the call, I thought maybe some more oil would help. It occurred to me that a couple of months ago, I started using EWL grease on my center-fires. So I cleaned that off the ejector and applied regular Hoppes gun oil on it.
Went to the Range and shot 150 rounds and no light-strikes

 

[Trigger Time]

Good to know. Thanks for the follow up.

 

[bpm32]

Apparently not.
I called Nelson today and spoke with Larry who was very friendly and helpful. He had me take apart the Unit, and with the slide only (no barrel blocking view) step by step I looked for anything rubbing or slowing the slide, as well as wear marks. He explained that the energy of a .22 is not the same as a .45, so it doesn't take much to keep slide from going completely forward as needed. Included in the inspection I watched the slide move over the ejector, but at the time did not see a problem.
After the call, I thought maybe some more oil would help. It occurred to me that a couple of months ago, I started using EWL grease on my center-fires. So I cleaned that off the ejector and applied regular Hoppes gun oil on it.
Went to the Range and shot 150 rounds and no light-strikes

Interesting—that’s a weird one!

I don’t bother oiling anything on .22 conversions, because that often induces failures for me, so I guess it makes sense.

 

[Magnumite]

thanks for the follow up. I need to run my Ciener conversion wet to keep it reliable.

 

[Rangeman]

thanks for the follow up. I need to mine wet to run

So happy it's "fixed"
Thanks for info. that helped lead me to source of problem. From now on regular oil....