Well, seeing as my trigger scale doesn't go beyond 8lbs, I did it the old fashioned way with counter weights. Looks like my trigger is tripping around the 9-9.5lb mark with a supposedly 12lb mainspring. Would love to get that down to sub 8lbs and still be reliable in setting off primers. Doable?
CZ75 SP01 Shadow 11.5lb hammer spring
- Thread starter Ant1-Hero
- Start date
Well, seeing as my trigger scale doesn't go beyond 8lbs, I did it the old fashioned way with counter weights. Looks like my trigger is tripping around the 9-9.5lb mark with a supposedly 12lb mainspring. Would love to get that down to sub 8lbs and still be reliable in setting off primers. Doable?
Very unlikely that is a 12# mainspring. I have two CZ's with 11.5 lb springs and they measure at 6.5 and 7 lb pulls. It sounds like they shipped you a 13 lb spring by mistake as a 12 lb should bring your pull down to just under 8 lbs. If you have a reduced power firing pin spring, you should be a ok as a lot of people use this combination without issues.
Dang it! That makes we leery of IPSCStore's EEmann springs if that's the case. Then again, I guess there's always a +/- tolerance with springs. I've got a 11lb and a 10lb spring coming in for testing. I'm using the reduced power firing pin spring with the lighter mainspring.
Don't blame the store as when they stock these springs they get them in bulk. It could always be an error on the supplier where they got the springs. I am sure that it wasn't intentional, but mistakes can happen.
The thought did cross my mind seeing as the 12lb spring I have in there now is pretty much the same as my 13lb spring. Might snip a coil off and see.
Hi Trinimon,
A long time ago, when the shooting world was green, there was no Internet, no so huge offer of gun related goods/service, only the corner gun shop.
I was shooting PPC.
I filed the width of the main spring of my modified S&W 66, testing it once in a while with a primed only brass until I was satisfied with it.
Then, I polished the spring bright.
I did the same thing with the springs of my S&W 10 and my Python.
Turned out very sweet.
And I did the same, now that I shoot IPSC, with my CZ-75B recoil and hammer springs.
Advantage : your pistol is pretty well balanced.
With no intent to offend anybody, my Tanfoglio springs are weighed 11,21 lbs and 12,31 lbs....wow ....that is outstanding precision.
Dan
A long time ago, when the shooting world was green, there was no Internet, no so huge offer of gun related goods/service, only the corner gun shop.
I was shooting PPC.
I filed the width of the main spring of my modified S&W 66, testing it once in a while with a primed only brass until I was satisfied with it.
Then, I polished the spring bright.
I did the same thing with the springs of my S&W 10 and my Python.
Turned out very sweet.
And I did the same, now that I shoot IPSC, with my CZ-75B recoil and hammer springs.
Advantage : your pistol is pretty well balanced.
With no intent to offend anybody, my Tanfoglio springs are weighed 11,21 lbs and 12,31 lbs....wow ....that is outstanding precision.
Dan
Yup. I've already hit Slavex up but also ordered a couple more different weight springs. Gonna have mainsprings coming out of my yin-yang very shortly. I'll have to start painting them so I don't mix 'em all up. lol
lol, I've also weakened springs in the past in a similar manner. Old skool method.
Edit: I figureed I had nothing to lose so I snipped a 1/2 coil off the supposedly 12lb hammer spring I have installed. Now it breaks at around 8.5lbs in DA and just around 3lb in SA. I'll pop some CCI primers this weekend and see if I get any failures.
Last edited:
if you paint the springs to keep them sorted, don't paint the end that goes into the spring cap, nor the end where it meets, and rides on, the hammer strut. The springs twist at those two places (well the whole spring turns) during compression, and painting there will make it bind a bit. I'd polish those areas and paint in the center.
..CCI primers are harder than Federal primers ..when you change to a lower poundage hammer spring using a harder primer to test for failures will assure all primers will ignite whereas if you use a softer primer to test such as Federal they may work fine but if you use a different primer that is harder you may have failures
I put the 11.5lb mainspring in along with the reduced power firing pin return spring and 11lb recoil spring.
After adjusting the over travel screw (thanks Slavex), I got the trigger fairly close to my S1. It's really close as far as pull weight - maybe just a hair heavier, but would really be tough to notice unless on deliberate, slow fire shots. Still a little gritty, but once I have some time to polish and shoot it, things should smooth out.
Really like the forward heft of the gun.
After adjusting the over travel screw (thanks Slavex), I got the trigger fairly close to my S1. It's really close as far as pull weight - maybe just a hair heavier, but would really be tough to notice unless on deliberate, slow fire shots. Still a little gritty, but once I have some time to polish and shoot it, things should smooth out.
Really like the forward heft of the gun.
It's in the trigger shoe. The small allen key in the kit fits it.
It does exactly what the name suggests:. It limits trigger over travel which, when adjusted correctly, will reduce the trigger reset.
Trigger over travel is the distance the trigger moves between when the hammer comes off the sear hook and when the trigger stops its rearward travel.
It does exactly what the name suggests:. It limits trigger over travel which, when adjusted correctly, will reduce the trigger reset.
Trigger over travel is the distance the trigger moves between when the hammer comes off the sear hook and when the trigger stops its rearward travel.
just be careful that you properly adjust it. There should be no contact between the hammer and the sear when the trigger is pulled fully to the rear. Rock the hammer back and forth, any click or hiccup felt means you need to back the screw off a tad. Always err on the side of caution.
