Misfire question

jbull380

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I have a 19-6 that I bought at a gumshow. It has obviously had a trigger job at some point. When using federal ammo or Federal primers I have never had a light strike problem however other primers and ammo will cause misfires. I recently took the crane out and cleaned it, this was the first time I've done this since I've had it. I just put a couple of hundred rounds through it and had one light strike, normally with this ammo(Winchester primers) I would have at least one light strike per cylinder during double action fire. I can only assume cleaning the crane and cylinder assembly had to do with the improved reliabilty. Now I would like to know specificly why. What part of the assembly is so affected?
 
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The fit of the crane to the cylinder assembly and the frame determines the fore-and-aft movement ("endshake) of the cylinder in the frame window. It also affects cartridge head-to-recoil clearance ("headspace").

Excessive fore-and-aft cylinder movement increases the chance of misfires. Dirt and firing debris between these moving parts reduces (at least temporarily) the chance of misfires.

When you combine minimal firing pin protrusion with maximum endshake, it increases the likelihood of misfires.
 
jbull,

Also, tighten the strain screw on the front of the grip, completely.

Mike
 
Well based on some of the junk and trinkets I've seen for sale at gun shows why would it be a surprise to see a gun at a gumshow? By the way while I was typing this my iPhone wanted to use the word "gumshoes"
 
Aside from tightening the strain screw, make sure it has not been filed down. That is a common way that people lighten up the trigger pull, and it is also sometimes the source of problems like yours. If it is flat & shinny at the end that pushes on the main spring, it was probably cut too short. It's an easy and inexpensive fix if that is the culprit - Brownell's usually has them in stock.

Of course that's assuming you do not have an end shake problem, a timing issue or something else.

Chief38
 
Strain screw is tight. I try to put at least a couple of hundred rounds down range a week. If no problems pop up I'll assume it was just too dirty. Maybe a side affect of shooting Glocks for so many years, cleaning is optional on my range gun. I'll just start making sure that cylinder assembly is regularly cleaned and lubed. I'm using cast wadcutters and unique powder so it gets very dirty. Thanks for the info!
 
if you're using "reloads" the problem "may" be with 'hard primers or primers that are NOT fully seated.....we start with the ammo first, then go over the gun....great points above by the way.....
 

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