Light firing pin strike

snubbies · June 14, 2009, 11:07 AM

Have a colt that works fine in single action but has a light firing pin strike in double action. What is cause and cure???

guy sajer · June 14, 2009, 12:28 PM

After you've eliminated a possible bad lot of ammo (have you tried different ammo ?) , I would assume a weak main spring .

What model is it ?

snubbies · June 14, 2009, 01:07 PM

I have not tried the ammo change. It is a COLT Diamondback. Everthing I read says a poosible mainspring problem thanks.

**Unclenick** · June 14, 2009, 01:39 PM

Most likely the mainspring has taken a set. Numrich has them for $11.50, though the label says it is for the Colt Agent, it is what is linked to from the Diamondback parts list, so I assume the two use the same spring. You can get a spring cryo-treated to limit how much of a set it takes. Just do any fitting work to lower trigger pull first.

guy sajer · June 14, 2009, 02:43 PM

Quote:

I have not tried the ammo change.

Might be worth a try . We ran into a batch of CCI 38 Spl ammo this year with apparently hard or not fully seated primers . Tried different ammo and all is well .

If not , Nick's got you dialed in to a replacement spring

Jim Watson · June 14, 2009, 04:30 PM

Take the grips off and look at the mainspring.
If the top leg of the V spring has a bend about midway from tip to V, it has been "raftered" as a cheap way to reduce the trigger pull. Also the ignition, as you see.

June 14, 2009, 11:07 AM	#1
snubbies Member Join Date: June 21, 2007 Location: Illinois Posts: 22	Light firing pin strike Have a colt that works fine in single action but has a light firing pin strike in double action. What is cause and cure???

June 14, 2009, 12:28 PM	#2
guy sajer Senior Member Join Date: December 7, 2002 Location: Ohio Posts: 329	After you've eliminated a possible bad lot of ammo (have you tried different ammo ?) , I would assume a weak main spring . What model is it ? __________________ Mitch Please support Crimson Trace Grips , Mossberg and Beretta . They support our troops .

June 14, 2009, 01:07 PM	#3
snubbies Member Join Date: June 21, 2007 Location: Illinois Posts: 22	Light STrike I have not tried the ammo change. It is a COLT Diamondback. Everthing I read says a poosible mainspring problem thanks.

June 14, 2009, 01:39 PM	#4
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,063	Most likely the mainspring has taken a set. Numrich has them for $11.50, though the label says it is for the Colt Agent, it is what is linked to from the Diamondback parts list, so I assume the two use the same spring. You can get a spring cryo-treated to limit how much of a set it takes. Just do any fitting work to lower trigger pull first. __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle

June 14, 2009, 04:30 PM	#6
Jim Watson Senior Member Join Date: October 25, 2001 Location: Alabama Posts: 18,546	Take the grips off and look at the mainspring. If the top leg of the V spring has a bend about midway from tip to V, it has been "raftered" as a cheap way to reduce the trigger pull. Also the ignition, as you see.