SP01 extractor spring? Issue...cases not clearing ej. port

[chrisjohn]

Running a 13 lb recoil spring with a stock main spring and am having some spent cases not clear the ejection port.  They extract fine, but dont seem be ejecting all that well.  Running 124 gr/3.5 gr. Clays.  No issue with factory ammo.

Will an extra power extractor spring hold the case tighter, thus get banged out harder by the ejector?  

Will change the mainspring when trigger gets worked over.  

[Miossi Gun Works]

3.5grs of Clays is a light load just making 875 to 900fps and a low chamber pressure of 31,400cup.  3.6grs is listed as max for Clays and a 124grs jacketed bullet.  I would change powder and load a little hotter so you get the slide moving a bit faster.  If it does not have a problem with factory ammo thats what makes me thing it is your load.

An extra power extractor spring is good insurance but in this case it will not make a difference.  The SP-01 slide is heavier and requires a bit more power to get it moving fast enough to eject the spent case.

Jim

Miossi Gun Works LLC
702 Park Dr
Monticello, IA 52310

[chrisjohn]

Thanks for the advice.

I know, Clays isn't the best powder, but I have 10 lbs of it.  Hodgen lists the max as 3.7 for 125 gr FMJ, think this would be okay?

[Stuart]

Any idea what that load chronographs at??

[Miossi Gun Works]

3.6 grs of clays should chronograph right around 960 fps, it is a light load but can be loaded hotter then published data as the cup pressure is on the low end.  I load some 9mm with a 124 FMJ and AA#7 over a full grain past max for my Colt SMG and it works just fine in my 9mm pistols with no signs of over pressure.  It chronographs at 1382fps yet is still milder then some of the surplus 9mm SMG ammo.

Jim

Miossi Gun Works LLC
702 Park Dr
Monticello, IA 52310

[nitzerebbhead]

I'm having a similar issue but with factory ammo.  It happened at my local USPSA shoot on Thursday and it FTE (failed to clear the chamber, but chambered a new round)  twice (once in two stages) using WWB 115GR FMJ rounds.  The gun only had about 300 rounds through it when it happened.  Then yesterday I was at another local USPSA shoot with 3 stages and it happened once on each stage.  This time I was using 124GR Federal American Eagle FMJ factory rounds.  I thought it was a mag problem, but I marked the mag I thought was bad and then it happened on a different mag.  Same symptoms.  I broke it down last night and compared the extractor to my CZ-75BD Police and they looked exactly the same (no nicks or deformaties).  I also made sure that it moved freely without sticking.  I noticed that the Police model has a ejector spring (?) that the SP-01 does not.  After dis-assembling my mags I did notice that they seems really dry.  Could a lack of lubericant in them cause this issue?  They got really sandy at one of the shoots and I brushed them out thoroughly, but didn't add anymore lube to the springs.  When I re-assembled them last night I made sure that they were properly lubed up.  I'm probably going to shoot it again on Thursday to see if that helps.

Derek

[nitzerebbhead]

By the way, the gun is otherwise stock (no spring changes, etc).

Derek

[elsolo75]

Try an 11# recoil spring, or a very well used factory recoil spring from a different CZ.

A friend of mine was having this problem with his SP-01 at a recent match, I gave him a very well used (worn out) factory recoil spring and his gun ran like a champ after that.

[nitzerebbhead]

I know my Police spring is round and the SP-01 is flat, but could I try that one in it?

Derek

[Miossi Gun Works]

One thing to keep in mind with any new gun is that a break in period is needed.  The slide ways and frame rails need to smooth out and mate; they will wear in the path of least resistance.  Another thing that I do with all CZ's is replace the extractor spring as preventative maintance.  With the SP-01 the heavier slide mass you can and may have to use 13lbs to 14lbs spring especially with light loads.  I use a 13lbs spring in my SP-01, it took about 700 rounds before it really seemed to smooth out.  I also use a bit more lube on the slide and frame rails die to the heavier slide.

As for lubing your magazines don't do it, magazines should be run dry.  If you lube them with any type of oil they will malfunction frequently as they will attract all the dust and dirt they can.  You can use a dry film magazine lube but I really don't see a need for it.  

The jamb or FTE's you are describing sound like the side is not cycling back fully all the time and this could be that the gun still needs a little more break in time or the slide is too dry or you are running too heavy a recoil spring for your loads.

Jim

Miossi Gun Works LLC
702 Park Dr
Monticello, IA 52310

[nitzerebbhead]

I'm using the stock recoil spring. Took it to the range yesterday again and ran about 300 rounds through it.  FTE fully about 6 times.  I cleaned it well and lubed the slide well before taking it to the range.  After talking to the range guy there he seems to think that the stock spring is too stiff also.  Basically it ejects the round, but catches half in and half out of the ejector port it as the slide cycles forward.  Also, since I wasn't running through a course I noticed that the ejected cases were hitting me in my shooting arm and not flying very far from the gun.  Now it has close to 700 rounds through it without any indication that the spring is loosening up.  What is the stock spring rated for in lbs?  I'm not using light loads, they are all factory pressures.  It did seem to fail more with the 124gr rounds (twice in 50 rounds as opposed to once in every 50 rounds for the 115gr rounds).  Where can I get a lighter recoil spring and will that make slide slap an issue?

Derek

[Stuart]

On my SP01s..I took out the factory flatspring and installed wolffe 12# recoil springs..

I have had no failures of extraction or ejection with this combo on my reloaded ammo running about a 128-130PF or factory ammo from Winchester and Federal.

[nitzerebbhead]

Installing a Wolffe 13lb. recoil spring seems to have fixed my FTE issues.  Thanks guys.