CZ Custom Comp Hammer DA worse than stock?

[zhand13]

I just installed the cz custom hammer and while I'm loving the crisp SA the DA is going backwards. 6k rounds through the original hammer and it was smooth as butter. The DA is now stacking quite a bit and causing a lot of movement upon trigger release.  Just replaced the DA roller bearing (bearing turning now)while installing the new hammer and lowered the trigger bar spring for less stacking. What parts should be greased? May the new hammer just need to be broken in?

[zhand13]

Range tested

SA breaks at the frame if it breaks at all now. 95% of the time it does not break. Have cgw's strongest sear spring in, short reset kit. Went from. 216 to. 220 for my double action roller

[koteris]

One of my P09's was kind of similar to this.  The CGW stealth hammer with a strong sear spring made the SA crisp, but made the DA stagey.  I messed around with it for a few months before I went back to the stock hammer with the buttery smooth DA and the smooth, rolling break SA.  It works well as my practice gun.  My match gun, however, has the upgraded hammer and SA and DA both feel great, so I think it depends a little on the particular gun.

I have experienced the SA not breaking, but only when using a short reset kit and it was remedied by the shorter hooks on the custom hammer. 

[zhand13]

Called cgw and they recommended I remove polymer behind the trigger to allow more room for the lifter to be raised. The SA is now working but my double action is very hard to keep under control as its break is much farther forward. The trigger breaks then slaps back 1/4" causing the sights to move  everytime when dry firing.

[Raining_Brass]

You've got some sort of timing issue going on.  Have you tried putting the OEM roller back in?

[zhand13]

I have not, cgw said the .004"/2 (bottom only) was no where close to enough to throw anything off. They said to raise the trigger bar spring to see if that brings the DA  break fartherback. I ordered the 92000 stealth hammer from cgw to play with in hopes the SA breaks farther forward. Im guessing i will have to add a overtravel screw since i removed probably 1/16" of polymer behind the trigger to get this cz custom hammer to break

[zhand13]

The SA does seem very sloppy when pulling the trigger without the slide on, I will try to get a video at some point today

[Raining_Brass]

I have not, cgw said the .004"/2 (bottom only) was no where close to enough to throw anything off. They said to raise the trigger bar spring to see if that brings the DA  break fartherback. I ordered the 92000 stealth hammer from cgw to play with in hopes the SA breaks farther forward. Im guessing i will have to add a overtravel screw since i removed probably 1/16" of polymer behind the trigger to get this cz custom hammer to break

They are correct but it's the easiest thing to take out and try to eliminate.

The hammer would have to be SEVERELY out of spec to be giving you the issues you're describing whereas the roller can cause a lot of headaches with timing.

[zhand13]

So, it seems the hammer is getting hung up. The actual break is not too far in front of the sa action. It stacks as if the break is farther but with two hands i was able to slow the trigger pull down enough to see it. I have videos and will look into getting them up here.

[zhand13]

DA roller did not help the cz custom hammer. CGW Stealth hammer arrived and it is sweet! There's another cz custom hammer on the market now..

[Raining_Brass]

DA roller did not help the cz custom hammer. CGW Stealth hammer arrived and it is sweet! There's another cz custom hammer on the market now..

Lol. It doesn't sound like you should be selling that thing, bur rather returning to CZC.

[schmeky]

In defense of CZC, a thousandth here (hammer) and thousandth there (frame) can stack up and make things less than ideal.  It can happen to all parts and all firearms.

Keep in mind the P-07/09 series are price point service grade firearms and are subject to tolerance variations.

[zhand13]

I am assuming it is only my specific gun that did not like the hammer and it would be great in 99/100 guns. If a few people feel strongly that I should return it then I definitely would.

[CAK]

I had the SAME exact problem with the CZC hammer in my P07 (check my forum post's, this was years ago). When the CZC hammer was fit with the CGW extra power sear spring, CGW short reset and lifter the DA would stack and the SA hit the frame before breaking (only with the extra power sear spring). I could make it work if I used the factory lifter but that removed the short reset.

When I swapped out the CZC hammer for the CGW hammer, all the issues went away. No stacking in DA and the SA and DA broke in the same exact spot on the trigger pull about 2mm before the trigger would touch the back of the frame.

I said this before...while the CZC hammer may work in some guns with CGW parts,  CGW parts work harmoniously when paired together.

The only drawback I've found is that the CGW hammer slams the hammer down on the half cocked notch when decocked (like the factory hammer) where as the CZC hammer would send it home gently. I'll give that up for a more reliable SA/DA break.

Having said that, throughout the years looking at P07/09 gun reviews it appears some guns send the hammer home soft when decocked and some send the hammer home hard as mine does.
David, any idea why that would happen? Difference in decocking levers?

 

[sakis]

I would say, put some grease on, trigger bar spring(that's right), hammer strut and hammer strut pin, and polish the lower left side of the hammer as well as the trigger bar spring at the tip where it is inserted in the groove. It is buttery smooth for mine after doing so.