Author Topic: New SP-01 - slide did not lock back on last round  (Read 469 times)

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Offline anonymouscuban

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New SP-01 - slide did not lock back on last round
« on: March 20, 2017, 11:58:03 AM »
I took out my new SP-01 last week. Shot the 1st 120 rounds through it. It's completely stock.  No mods.

On two occasions, the slide did NOT lock back with the last round. Both times, my wife was firing it.

I was shooting 115g Blazer Brass new ammo.

Is this just a matter of heavy recoil spring and break in of the pistol?

Or should I just blame the wife? Lol

All shells are ejecting nicely and away from my feet.

Btw, here is my last 20 rounds at 10 yards. I'm a pretty new shooter so pretty happy with my grouping.



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Offline CBHarto

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Re: New SP-01 - slide did not lock back on last round
« Reply #1 on: March 20, 2017, 12:37:38 PM »
Something to check is if she's resting her front thumb on the slide release (if using a thumbs forward grip). I ran into this issue with my 75 on occasion, just have to pay attention to hand position.

Offline PnoyGeek

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Re: New SP-01 - slide did not lock back on last round
« Reply #2 on: March 20, 2017, 01:14:51 PM »
It might be ammo related.  Although Blazer Brass is a good and consistent ammo but I find it on the weak side.

I much prefer slightly hotter round like the Lawman Speers if I can find it cheap.  I also prefer shooting heavier 124gr or 147gr bullets.  I find that the felt recoil is more of a nudge with the heavier bullets rather that the sudden push with the 115gr bullet.

Nice shooting by the way...
« Last Edit: March 20, 2017, 05:02:04 PM by PnoyGeek »

Offline SoCal

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Re: New SP-01 - slide did not lock back on last round
« Reply #3 on: March 20, 2017, 01:40:33 PM »
Something to check is if she's resting her front thumb on the slide release (if using a thumbs forward grip). I ran into this issue with my 75 on occasion, just have to pay attention to hand position.
I agree, had that problem on a Sig or she could be "limp wrist-ing", goolge than for better explanations than I can give.
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Offline 1SOW

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Re: New SP-01 - slide did not lock back on last round
« Reply #4 on: March 20, 2017, 01:46:10 PM »
New shooter at 10 yards,  groups are looking good. 8)

If cases are falling at your feet,  the recoil spring is too HEAVY for that ammo. 6' to 8' is a good case toss.
Your wife's slightly lighter grip,  combined with the light ammo is likely the cause of the slide not locking back.

Just a guess based on the given facts.

Correction!  Recoil spring may be too heavy---Heavy :-[
« Last Edit: March 20, 2017, 04:27:58 PM by 1SOW »

Offline anonymouscuban

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Re: New SP-01 - slide did not lock back on last round
« Reply #5 on: March 20, 2017, 03:43:13 PM »
Thanks guys. We are hitting the range again this week so I will have to check her grip and hand placement to see if maybe she is interfering with the slide movement.

Thanks for the encouragement on the shooting as well. I thought  it was good for me compared to previous shooting but not sure how it stack up in general. Sounds like I did pretty good.

What's helped a lot for me is sight picture and trigger control. The latter being where I screw up more. I really focuses on even trigger pulls and trying not to anticipate the recoil. It really helped.

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Offline PnoyGeek

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Re: New SP-01 - slide did not lock back on last round
« Reply #6 on: March 20, 2017, 05:10:07 PM »
What I really like about the CZ trigger is the ease to stage the trigger right up to the wall then I can correct my sight alignment if needed before pulling the trigger. It really help when doing precision shooting.

By the way, stock 9mm CZ are sprung to handle 9mm NATO loads so if the round is too weak it might not cycle the pistol properly or not lock the slide to the rear on an empty mag.
« Last Edit: March 20, 2017, 06:21:57 PM by PnoyGeek »

Offline anonymouscuban

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Re: New SP-01 - slide did not lock back on last round
« Reply #7 on: March 20, 2017, 07:57:09 PM »
What I really like about the CZ trigger is the ease to stage the trigger right up to the wall then I can correct my sight alignment if needed before pulling the trigger. It really help when doing precision shooting.

By the way, stock 9mm CZ are sprung to handle 9mm NATO loads so if the round is too weak it might not cycle the pistol properly or not lock the slide to the rear on an empty mag.
I'm not sure how I feel about the trigger yet. I don't know enough about them to tell whether or not I like it. I doubt at my current skill level it's making any appreciable difference in my accuracy.

As far as the spring weight, I'm not yet ready to say the couple of times it failed to lock were related to it. Like I said, both times happen while my wife was shooting.  It didn't happen to me. The casings  seem to be ejecting nicely as well. They're not falling at our feet.

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Offline SolCalSpark

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Re: New SP-01 - slide did not lock back on last round
« Reply #8 on: March 20, 2017, 11:44:09 PM »
Hey Cuban

I put 500 rounds of 115gr blazer brass threw my new stock sp without a hiccup, I think you can rule that out.
My wife had the same prob with my friends 100% reliable Beretta 92. She's lil, it was her first time shooting a handgun and we narrowed it down to limp wristing. I told her this is one instance that requires a man's touch ! Yes I made sure the gun was empty and not in her possession when I made my comment !!! LOL

I'm a noob to and like you research the !@## out of everything and the only other thing I've read is possibly a bad mag. I have 2 CZ and 2 mec gars all 10 rounders. If it continues to happen you can try my mec gar to rule out if you have a bad mag.

My rounds weren't ejecting very far at all, mostly at my feet at the outdoor range and almost all the shells landed on the shooting counter at the indoor range.
I just changed out my recoil spring for a 13lb from czcustom for the next trip to the range. I just have to wait till payday to buy more ammo.
I also have a czcustom 13lb hammer/main spring and firing pin spring for the next, next trip to the range. My DA feels pretty heavy unless I pull to half cocked then it's easier to pull the trigger smoothly. Do you use your fingertip or knuckle deep to pull the trigger ? I'm still trying to fig out what works best.
SA is pretty sweet. I agree with PnoyGeek I like that you can take up the slack in the trigger and focus, breathe and pull the trigger.
Have you noticed take up seems shorter when firing live rounds as opposed to dry firing ?

I'm working one upgrade at a time to get a better feel for the changes I'm making.

I also found a Justin Bieber doll at Goodwill for target practice !!!




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« Last Edit: March 21, 2017, 01:10:38 AM by SolCalSpark »

Offline anonymouscuban

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Re: New SP-01 - slide did not lock back on last round
« Reply #9 on: March 21, 2017, 01:07:26 AM »
Hey Cuban

I put 500 rounds of 115gr blazer brass threw my new stock sp without a hiccup, I think you can rule that out.
My wife had the same prob with my friends 100% reliable Beretta 92. She's lil, it was her first time shooting a handgun and we narrowed it down to limp wristing. I told her this is one instance that requires a man's touch ! Yes I made sure the gun was empty and not in her possession when I made my comment !!! LOL

I'm a noob to and like you research the !@## out of everything and the only other thing I've read is possibly a bad mag. I have 2 CZ and 2 mec gars all 10 rounders. If it continues to happen you can try my mec gar to rule out if you have a bad mag.

My rounds weren't ejecting very far at all, mostly at my feet at the outdoor range and almost all the shells landed on the shooting counter at the indoor range.
I just changed out my recoil spring for a 13lb from czcustom for the next trip to the range. I just have to wait till payday to buy more ammo.
I also have a czcustom 13lb hammer trigger and firing pin spring for the next, next trip to the range. My DA feels pretty heavy unless I pull to half cocked then it's easier to pull the trigger smoothly. Do you use your fingertip or knuckle to pull the trigger ? I'm still trying to fig out what works best.
SA is pretty sweet. I agree with PnoyGeek I like that you can take up the slack in the trigger and focus, breathe and pull the trigger.
Have you noticed take up seems shorter when firing live rounds as opposed to dry firing ?

I'm working one upgrade at a time to get a better feel for the changes I'm making.

I also found a Justin Bieber doll at Goodwill for target practice !!!




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I considered that it could be one of my mags. Thing Is we were using both that I have and I don't know if it happened with the same one or not. Will have to check Wednesday when we go to the range again.

Cool that you got those mods in the bullpen waiting. It's the two mods I'm considering.  Want to fire at least 500 rounds before I do decide.

Yeah, the DA pull is it a bit heavy. TBH, I fired it mostly in SA. Need to shoot more DA to practice. I use the pad of my finger when shooting SA.  It's a bit rough do the same with DA  though.

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Offline bsand

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Re: New SP-01 - slide did not lock back on last round
« Reply #10 on: March 21, 2017, 01:37:18 PM »
One easy way to confirm it's the mags or shooter, is to pull the slide back with a empty magazine inserted. If the gun locks back with all magazines, then it's a user error ie thumb touching the slide lock.

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Offline matty76

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Re: New SP-01 - slide did not lock back on last round
« Reply #11 on: March 22, 2017, 07:42:29 PM »
Anonymouscuban, as a fellow newbie, your questions, posts and experiences are almost identical to mine. On my second shoot, I had the same issue of the slide not locking back and posted about it. Just based on my experience, it was either a matter of breaking in the gun or cleaning the magazines thoroughly. I say that because I paid more attention in cleaning my magazines after that shoot and by the third trip to the range onwards there have been no issues of the slide not locking back. Hope it will be the same result for you.


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Offline anonymouscuban

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Re: New SP-01 - slide did not lock back on last round
« Reply #12 on: March 22, 2017, 08:49:39 PM »
Just got back from the range. Between my wife and I, we put another 150 rounds through the gun and I am happy to report no issues. The slide locked every time  with the last round.

I also noticed that the cartridges are ejecting very nicely. All shoot out well away from our feet.

Here is the result of my last 20 rounds at 10 yards.



It's this side target.



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