Spring weights....

[viking499]

What is the poundage of the hammer and recoils springs on the PCR, P-01 and Compact?

How many of you have swapped those springs out?  What poundage did you do to?

[Canuck44]

I go to 13# hammer springs on all my CZ's and have never had a failure to fire in about 15 years of competitions and practice.  Really improves the trigger pull.  I have used every type of primer available to us in N.A. t.hey all go bang

Take Care

Bob

[viking499]

Thanks Bob. 

Forgot to add that I do not shoot any competitions.  Just going to use the guns for general shooting and defense purposes.

[BGlas]

I use the 11.5lb hammer spring and 20lb recoil spring in my P-01. I subscribe to the theory that with factory ammo, any reduction in hammer spring needs an increase in recoil spring for balance. I've also tried the 13lb hammer spring and 16 & 18lb recoil springs and the 11.5/20lb combo is my favorite for DA pull weight and getting back on target.  (Disclaimer: I also have several other CGW parts in my P-01, but tinkering with springs was done after I added the parts)

[Tok36]

I use the 11.5lb hammer spring and 20lb recoil spring in my P-01. I subscribe to the theory that with factory ammo, any reduction in hammer spring needs an increase in recoil spring for balance. I've also tried the 13lb hammer spring and 16 & 18lb recoil springs and the 11.5/20lb combo is my favorite for DA pull weight and getting back on target.  (Disclaimer: I also have several other CGW parts in my P-01, but tinkering with springs was done after I added the parts)

First i have head of this, and i cannot make any sense out of it. Probably me.

Why would a reduction in hammer spring weight require an increase in recoil spring weight? I am quite puzzled by this.

[cntrydawwwg]

With less hammer weight, the hammer cocks back easier, allowing the slide to come back quicker as it cocks the hammer. Which allows for more recoil allowing for more muzzle rise and more slamming. Springs are a system that work together. I haven't put enough rounds down range yet to  play with this in my CZ's yet but will look into it.
  Wow, that was a mouth full[emoji2] hope I explained it right. [emoji6]

[Tok36]

With less hammer weight, the hammer cocks back easier, allowing the slide to come back quicker as it cocks the hammer. Which allows for more recoil allowing for more muzzle rise and more slamming. Springs are a system that work together. I haven't put enough rounds down range yet to  play with this in my CZ's yet but will look into it.
  Wow, that was a mouth full[emoji2] hope I explained it right. [emoji6]

Thanks, cntrydawwwg. I had never considered an increase in slide velocity due to a lighter hammer spring. It dose make some sense now that you explained it.

I have not played with the recoil springs much. I have more commonly read of people decreasing both the hammer and recoil spring weights.

Interesting stuff.

[Alpha Sierra]

With less hammer weight, the hammer cocks back easier, allowing the slide to come back quicker as it cocks the hammer. Which allows for more recoil allowing for more muzzle rise and more slamming. Springs are a system that work together. I haven't put enough rounds down range yet to  play with this in my CZ's yet but will look into it.
  Wow, that was a mouth full[emoji2] hope I explained it right. [emoji6]

That may sound good in theory but that's not how it works in real life testing.  Increasing recoil spring weight makes the slide slam forward more violently which increases your recovery time.

There is plenty of good reason why competitive shooters who use CZs in USPSA and IDPA reduce the strength of both springs to end up with a more shootable (i.e. faster) pistol.  And no, loads are not bunny fart reloads.  You have to make at least 125 power factor (bullet weight x muzzle velocity).

[Sancho]

Does anyone have a video or series of pictures on changing the hammer spring?  I am reluctant to try it without some guidance.

Sancho

[Tok36]

Does anyone have a video or series of pictures on changing the hammer spring?  I am reluctant to try it without some guidance.

Sancho

This vid covers changing a hammer spring at around the 2:40 mark. One amendment, i usually push the Main Spring Plug down onto a hard surface rather than using my fingers, then push the retaining pin out with a punch or available  Allen key (the retaining pin should slide rite out with little force). The CGW Joe Tool makes things a little faster as well if you plan on chaining allot of hammer springs.

Video is in post #3.
http://www.czfirearms.us/index.php?topic=56138.0

[cntrydawwwg]

With less hammer weight, the hammer cocks back easier, allowing the slide to come back quicker as it cocks the hammer. Which allows for more recoil allowing for more muzzle rise and more slamming. Springs are a system that work together. I haven't put enough rounds down range yet to  play with this in my CZ's yet but will look into it.
  Wow, that was a mouth full[emoji2] hope I explained it right. [emoji6]

That may sound good in theory but that's not how it works in real life testing.  Increasing recoil spring weight makes the slide slam forward more violently which increases your recovery time.

There is plenty of good reason why competitive shooters who use CZs in USPSA and IDPA reduce the strength of both springs to end up with a more shootable (i.e. faster) pistol.  And no, loads are not bunny fart reloads.  You have to make at least 125 power factor (bullet weight x muzzle velocity).

  Thanks Alpha. I didn't mean to say that it always worked, that's why I mentioned that the springs work together. It's just the way I've understood it from what I've read on here. So thanks for adding.

[Canuck44]

Does anyone have a video or series of pictures on changing the hammer spring?  I am reluctant to try it without some guidance.

Sancho

Sancho it is so easy when you watch the video do not over think it. 

As an aside I have not gone to a reduced recoil spring.  Maybe there is a physics major out there who can come up with some reason for me to do so.  I doubt it.  I am not a robot, just an aging shooter.  My reflexes are not what they once were and I have no problem admitting I can not take advantage of the fast reset on my Shadowline.  I have never had to wait for my slide to return to battery before pulling the trigger again.  Since the 13# spring gives me a slightly lighter DA trigger pull, for me, objective met.   

Take Care

Bob

[cntrydawwwg]

Sancho, instead of buying the Joe tool, I just used a 1/4" socket with electrical tape on it so it didn't scratch the finish.
   Canuck +1

[Sancho]

In the worlds of Elvis, "thank you, thank you very much!"

Sancho

[amada8]

I have a Pro Package 75D Compact (P01) from CGW.  They changed the recoil spring to #14.  I shot several hundred with this spring before replacing with the factory #17.

I shoot with better accuracy using the #17.