3+ Micro disappointments

[briang2ad]

Got a 3+ micro for my wife, and while she loved shooting it, I had to adjust the sights ALL the way to one side (rear) to hit center.  It went back to CZ USA.  They were ordering a new barrel, bolts and forend, and it took to long so they send a new pistol.  Nice.

New pistol came and .... I just shot 200 rounds.  I had 2 Failures to feed (nose up) from WWB using ETS mags.  Note that ETS mags have run fine for me on my EVO S1 and I think the first Micro.

At the end I did do very rapid double taps with at least a mag and maybe more, and there were NO malfunctions.  DO you think it is break in?  Ugh. 

My Evo S1 has been flawless with about 1K.  Also - Magpul mags do NOT drop free on the Micro.  ETS and CZ mags do. 

[DeltaPapa]

My 3 Plus (non-micro) does not like WWB even from day one.  It'll shoot anything else with no problem.  From what I understand the 3 Plus mags are unique and not backward compatible with EVO S1 mags.

[MeatAxe]

My 3 Plus (non-micro) does not like WWB even from day one.  It'll shoot anything else with no problem.  From what I understand the 3 Plus mags are unique and not backward compatible with EVO S1 mags.

Actually, the 3+ mags will work fine in the older Evo 3 guns, but the Evo 3 mags will not work in the new 3+ guns without modifying the older mags.

I believe Yeti Werks has a 3D printer jig available to grind a divot in the old mags for the 3+ mag catch to engage.

The good news is that Magpul is now making their Scorpion mags compatible with the 3+!

[MeatAxe]

Got a 3+ micro for my wife, and while she loved shooting it, I had to adjust the sights ALL the way to one side (rear) to hit center.  It went back to CZ USA.  They were ordering a new barrel, bolts and forend, and it took to long so they send a new pistol.  Nice.

New pistol came and .... I just shot 200 rounds.  I had 2 Failures to feed (nose up) from WWB using ETS mags.  Note that ETS mags have run fine for me on my EVO S1 and I think the first Micro.

At the end I did do very rapid double taps with at least a mag and maybe more, and there were NO malfunctions.  DO you think it is break in?  Ugh. 

My Evo S1 has been flawless with about 1K.  Also - Magpul mags do NOT drop free on the Micro.  ETS and CZ mags do.

The 3+ “may” need a little break-in, but the blowback Scorpion has a solid reputation for reliability.

On the other hand, Winchester WB ammo is notoriously dirty and unreliable.

[briang2ad]

Thanks folks - what I was thinking.  The WWB ran fine in my P01, P07, and P365XL, but the scorpion choked.  But, as I said, I ran it hard on double taps the last 40-50 rounds and it seemed OK.

I know that my EVOS1 and the first Micro were fine on Tula, Blazer Al, and BB.

This is the first WWB I've used in a long time, and I do remember it NOT being the greatest.  I actually like steel cased Russian much better - its very consistent for me. 

[MeatAxe]

Thanks folks - what I was thinking.  The WWB ran fine in my P01, P07, and P365XL, but the scorpion choked.  But, as I said, I ran it hard on double taps the last 40-50 rounds and it seemed OK.

I know that my EVOS1 and the first Micro were fine on Tula, Blazer Al, and BB.

This is the first WWB I've used in a long time, and I do remember it NOT being the greatest.  I actually like steel cased Russian much better - its very consistent for me.

The 3+ Micro only has a @ 4” barrel, so it may not have enough oomph to power through the crud powder fouling that is Winchester WB ammo.

The EVO 3s had a minimum @ 8” length barrel, correct?

[Destructo6]

The EVO 3s hhad a uminimum @ 8” length barrel, correct?

7.72", which is pretty optimal to maximize 9mm velocity.

[Trooper894]

I been shooting for over 40 years and early on Winchester White Box ammo was my principle factory practice ammo. However, over the years I started to see a trend. First the WWB ammo was getting weaker and weaker and with the lighter 115gr 9mm bullet I occasionally started to see more malfunctions. Then in the last 10+ years the WWB seemed to become more inconsistent with varying velocity/energy within a single box. This would be evident, with the unscientific measurement of the ejection (or maybe not) of spent cases, failure to completely feed and wider impacts on target. The problem seems to be most evident in the 9mm line as I have not seen the same power variation with the .40 S&W or .45acp WWB ammo. I have not observed the same amount of issues with the WWB 9mm 124gr ammo. For new blowback firearms with a heavy bolt, 115gr ammo may not be the best choice for use during break-in. Remember, 115gr 9mm is a uniquely American loading, as elsewhere in the world, 124gr is the standard, so non-American designed firearms are designed around the 124gr loading.

[briang2ad]

There is also a TAD of difference of how a bullet sits in the ETS mags WRT the feed ramp.

If I feed a snap cap in really slow, I can get it to hang up on the NOTORIOUS GAP between the feedramp and the chamber opening. 

But again, it was 100% with OTHER ammo, and the ETS mags in the S1. 

[ShakyDog]

I found the ETS mags to be my least favorite. I hate to say it but the Magpul's look to be the best all around Scorpion mag for the money. I have them all and the new windows 30s from CZ are nice, but almost twice the price of the Magpuls. I have the most of the ARV mags and they work great in my CZ, but not so great in my New Frontier Armory S-9.

Steve

[briang2ad]

Maybe this should be a new post, but I've found a POSSIBLE issue with my feed ramp (Micro Plus).   Here is the plus:



Here is the S1:



It seems to me that the Plus has a more distinct GAP between the ramp and chamber, and may account for some of the feeding issues I've had.

I've done a bunch of playing with mags.  MP don't seem to be a problem but WILL NOT drop free from the Micro Plus (yes, why have a AR15 mag catch?).

I can get the Plus to choke on loading one round during or after mag insertion on a ETS 40.  Not the 30.  (I'll admit the Evo S1 has on occassion done the same with the 40 ETS mag). 

But I don't like the looks of what I would call the ramp gap in the Plus.

Plus, the plus lower is pretty lose. 

Thoughts?

[MeatAxe]

But I don't like the looks of what I would call the ramp gap in the Plus.

Plus, the plus lower is pretty lose. 

Thoughts?

I have a 3+ pistol (8” bbl.), but with a 16” Evo 3 S1 barrel installed. I see no significant gap between the feeding ramp and the chamber, in fact it fits pretty much flush. Not sure what help that is, but I don’t remember any gap with the 8” barrel, and never had any feed issues. Maybe your 4” barrel is out of spec? Hopefully some 3+ Micro owner will chime in.


I will say the Ascalon Arms shim works very well to tighten up the slop between the upper and lower. Probably works better than some other solutions where you have to drill the pin hole out.

https://nexusfirearms.com/receiver-shim-for-cz-scorpion-evo-3-3/

[MeatAxe]

Maybe this should be a new post, but I've found a POSSIBLE issue with my feed ramp (Micro Plus).   Here is the plus:



Here is the S1:



It seems to me that the Plus has a more distinct GAP between the ramp and chamber, and may account for some of the feeding issues I've had.

I've done a bunch of playing with mags.  MP don't seem to be a problem but WILL NOT drop free from the Micro Plus (yes, why have a AR15 mag catch?).

I can get the Plus to choke on loading one round during or after mag insertion on a ETS 40.  Not the 30.  (I'll admit the Evo S1 has on occassion done the same with the 40 ETS mag). 

But I don't like the looks of what I would call the ramp gap in the Plus.

Plus, the plus lower is pretty lose. 

Thoughts?

OK, now that I see the pics, I have to say, the pic of the 3+ Micro feed ramp and chamber look exactly like that on my 3+ pistol with the S1 16” barrel. The “gap” on the sides of the feed ramp look like intentional “chamfering” during manufacturing. The bottom of the feed ramp and the chamber (where the bullet noses up) are pretty much flush at the bottom for ease of movement.

The photo of the S1 shows the same type of chamfering on either side of the feed ramp, but looks like it has some damage to the lower lip of the chamber!

So I’m gonna say, the “gap” / chamfering on either side of the feed ramp is by design and probably the same on S+s and Evo 3s alike.

[briang2ad]

Thanks.  I THINK I have now narrowed it to the ETS 40rd mags.  This is not confirmed totally because its not in live fire.  When I use a 40 rd mag with a snap cap I can get FTF with the first round in my micro 3+ and even sometimes in my S1.  That is NOT true with the 30 rd and any MP or CZ mag.  So, I will scrap the 40s and call it solved for now. 

BTW - I have a Tipton rd that I blunted the nose to to check function.  The top round feeds from the left so its the worst angle by my book. 

Also, thanks for the confirmation that my ramp seems to be standard. 

[DeltaPapa]

But I don't like the looks of what I would call the ramp gap in the Plus.

Plus, the plus lower is pretty lose. 

Thoughts?

I will say the Ascalon Arms shim works very well to tighten up the slop between the upper and lower. Probably works better than some other solutions where you have to drill the pin hole out.

https://nexusfirearms.com/receiver-shim-for-cz-scorpion-evo-3-3/

It seems that the receiver shim is sold out here in the US; I had to order direct from Ascalon Arms.  Shipping only took a week via mail from the Czech Republic.