Register
Log In
Home
December 21, 2010
Offline
I had picked up a 6" 722 Monson DW in very good condition. Unfortunately the first time I had fired it in double action I had only 5 outta 6 round fire. I had to fire that remaining round in single action to get it to light. Thinking maybe I had a bad round I loaded 6 more and had 2 that would not fire in double action, so off to this forum to do some research…
I had found the threads regarding tuning up small frames and read it completely. So I took apart revolver cleaned and lightly re lubed as well as some light polishing on all mating surfaces, reassembled and still getting 1 of 6 not firing. So I went to Wolff spring website and ordered their DW small spring kit which included both a 7.5 and an 8 lb spring. After receiving this kit a week later I have installed both new springs with essetially the same result. I can sometimes get all 6 rounds to fire but still getting some that wont in double action. Never a problem in single action though, since hammer has more travel in this position.
Open to ideas
thx
Range Officer
Range Officers
Dans Club
March 27, 2009
Offline
cylinder not square with world and worn firing pin! Is the cylinder dented from dry firing? does it strike and same cylinder or miss the same one everytime? Worn firing pin would be my best guess!
when you get it right you will have a new Dan it sounds like.
I have never had this problem with a Dan so guessing!
December 21, 2010
Offline
Does not happen on same cylinder every time. There are no firing pin marks on cylinder.
Firing pin was prolly gonna be my next guess but wanted to bounce it off some of you first.
Gonna start searching for replacement firing pin....
Range Officer
Range Officers
Dans Club
March 27, 2009
Offline
See if anyone else Chimes in. Keep us posted!
Dans Club
March 2, 2008
Offline
As part of your disassembly and tuneup, did you remove the firing pin and clean it, replace the spring, and clean the firing pin channel? Since this is not part of the internal frame lockwork, it is often overlooked.
Especially on a .22 lr, that has maybe been shot a lot with cheap, dirty ammo, this might be your problem. If the problem does not register to a specific chamber each time, it may well be this, or an over/under tightened grip screw.
I went to a bookstore and asked the saleswoman "Were is the Self Help Section?" She said if she told me, it would defeat the purpose.
George Carlin
Supporter
Range Officer
Range Officers
May 2, 2009
Offline
Try a different box/brand of ammo before you start pulling your hair out... You'd be surprised the difference in rim thickness between lots.
I spent a week trying to figure out why my lever 22 wasn't setting off rounds every time... switched to a different lot of ammo and no more problems. I measured the rims when I got home and there was quite a difference.
SHOOT
January 2, 2011
Offline
I shoot quite a bit of rimfire. I think I might know what your problem is.
You are using Remington ammo.
Am I right?
December 21, 2010
Offline
No remington ammo tried Federal bulk pak and cci mini mags. Gonna take the advice of trying to clean firing pin first but need to find a small pinch first.
Do ya think that a WEAK firing pin would cause a light hit?? I can see possibly dirt having that effect but I give it a try..
Can you explain how an over/under tight grip screw affects the mainspring?
Thanks
January 2, 2011
Offline
I was thinking that Remington Rimfire ammunition has nortoriously bad priming. Fed, and CCI should both go bang. Eley will have thicker rims, if cleaning doesn't help, try them. Should get better accuracy too.
Do you have calipers? I'm sure somebody here probably has the spec length on the firing pin.
Dans Club
March 2, 2008
Offline
mkf350 said:
Can you explain how an over/under tight grip screw affects the mainspring?
Thanks
The grip screw threads into the mainspring seat, which is installed on the lower end of the grip tang. The mainspring and mainspring guide drop into the tang and seat into the top of the mainspring seat. If the grip screw is too long, or screwed in too far, it can contact the lower end of the mainspring guide, pushing it upward. In DA, you may possibly not get the full tension of the mainspring driving the hammer forward, essentially not a "full" cocking action. When cocking manually in SA, you tend to get more complete spring tension.
If you look at the last page of this:
https://www.danwessonforum.com/wp-content/uploads/small-frame-manual.pdf
Part numbers 10 and 11 seat into number 49. if the grip screw pushes too far up into the bottom of number 49 you might not get the full force of the mainspring tension. An extraordinarily long grip screw might cause the action to not cock at all in SA or DA.
There are two different length DW factory grip screws, for different styles of grips. Some have a captured washer at the head, and if this washer has been removed (or if the grip screw hole in the grip has gotten deeper) the grip screw goes in too deep.
If you have not looked at this yet:
https://www.danwessonforum.com/?page_id=3/reloading/tuning-up-your-15-2-the-average-joe-method/
I strongly urge you to. Even if you never do this, and it's very easy, it helps you understand how everything works together.
[Image Can Not Be Found]
I went to a bookstore and asked the saleswoman "Were is the Self Help Section?" She said if she told me, it would defeat the purpose.
George Carlin
1 Guest(s)
