Author Topic: RAMI nose dives from mags  (Read 5179 times)

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Offline aussie57

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RAMI nose dives from mags
« on: November 12, 2018, 11:12:02 AM »
I've had and carried this RAMI since 2006. Gun has never missed a beat until it started acting up a little time ago with rounds nose diving into the feed ramp and causing FTF's. Replaced guide rod assembly and bought a new magazine (14 rounder) from CGW. Figured either the mag spring were shot, guide rod or both. Gun has been shot a bit over 12 years. Shot it yesterday and it is still nose diving.

My reloads are Zero bullets 125 gn jacketed either JHP's or the JHP-C which is a conical shaped bullet profile as seen in the nose dive jam into the feed ramp.
Now I'm starting to wonder if the RAMI just does not like this bullet profile. Seems to shoot the Hollow Point Non-Conical bullet just fine. My other CZ's and other pistolas eat the conical shaped bullet just fine. Anyone else have issues with their RAMI and certain bullet profiles???
Pics of the JHP-C (conical) on the left compared to the regular JHP Hollow Point on the right.


Offline dbarn

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Re: RAMI nose dives from mags
« Reply #1 on: November 12, 2018, 01:21:41 PM »
My thoughts are a bullet profile that would not make a difference in another CZ, would make a difference in a Rami.

The newer Mecgar CZ magazines with their revised blue followers and improved springs would be an improvement that may help with different bullet profiles. If you have one for a compact or full size, I would give them a try. This may help to rule out magazine issues as they are the gold standard IMHO. If you try to download a black follower magazine, it's difficult to do so with every other round dipping down. Not so with the Mecgar blue follower one. You can quickly download with your thumb.

Now if we could only get Mecgar to make these in a 10 rd Rami version.  :(
« Last Edit: November 12, 2018, 01:27:34 PM by dbarn »

Offline rkwhyte2

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Re: RAMI nose dives from mags
« Reply #2 on: November 12, 2018, 02:03:42 PM »
What we need is a source for the blue followers that Mecgar uses.

Offline dbarn

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Re: RAMI nose dives from mags
« Reply #3 on: November 12, 2018, 03:20:59 PM »
What we need is a source for the blue followers that Mecgar uses.

That would a nice start, though there are other subtle improvements to the mag body as well.

A larger U cut exposing more of the rear of the top bullet.
An improved bullet stop in the front.
Anti-friction coating and different more narrow angular profile near the top.

In my experience with CZ these are the best mags. YMMV



Offline Walt Sherrill

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Re: RAMI nose dives from mags
« Reply #4 on: November 12, 2018, 03:56:23 PM »
I don't think the guide rod or recoil spring can have much effect on how a round chambers (or doesn't) UNLESS the recoil spring is really weak -- and that wouldn't cause nose-dives.  It just wouldn't have stored force to strip and fully chamber the round.  If the existing guide rod and recoil spring feed other rounds properly, you can probably discount both of those variables.

I've found that shooting 9mm hollowpoints in my FNS-40 semi-auto (when running a 9mm conversion barrel) will cause the hollowpoint to bite into the feed ramp, while hardball (round nose, no opening) feeds regularly.  (I ended up buying some 9mm mags -- even though I'd almost never shoot hollow-point ammo n the conversion barrel.)  I don't think that would be a problem if I were running the same round in a 9mm gun, rather than a converted .40.  And since it's still happening with a new mag, it's arguably not a mag spring issue, or that you might be using a mag for the wrong caliber.  (Weak mag springs will often still work if you download 3-4 rounds -- but they can't handle the extra weight of a full mag.)   

Weak springs often cause the nose of rounds to dip -- but if they do, they'll typically do it with all rounds of any shape, not just one type -- but do it less often if you  download several rounds.

It may just be bullet shape.

Offline aussie57

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Re: RAMI nose dives from mags
« Reply #5 on: November 12, 2018, 04:11:57 PM »
Bullet shape of the conical JHP causing the issue are my thoughts too. Does Mecgar make those mags for the RAMI? I am gonna pick some of the Mecgar BLue round follower mags up for my CZ75. Anyone got a link with a decent deal? BTW thank you for all the replies. Nice to bounce thoughts around and get other perspectives.

Offline jack76590

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Re: RAMI nose dives from mags
« Reply #6 on: November 12, 2018, 04:24:46 PM »
My Rami was ok with round nose ammo, but had same problem as you with JHP. Bullets nosedived. Heavier mag springs seemed to have solved problem. By heavy I mean the wolff spring for full size cz that is +10% used in rami 10 round mag. And you can still get in 10 rounds with this spring installed. Word to the wise the wolff springs for compact mags are weaker than original equipment springs in 10 round mags. I think cz knew rami needed heavy springs but did not go far enough. Good luck. Link. Remember the full size mag springs and pull down menu to get +10% power.
https://www.gunsprings.com/CZ/75%20Series/cID1/mID16/dID91#842

Offline aussie57

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Re: RAMI nose dives from mags
« Reply #7 on: November 12, 2018, 04:51:38 PM »
My Rami was ok with round nose ammo, but had same problem as you with JHP. Bullets nosedived. Heavier mag springs seemed to have solved problem. By heavy I mean the wolff spring for full size cz that is +10% used in rami 10 round mag. And you can still get in 10 rounds with this spring installed. Word to the wise the wolff springs for compact mags are weaker than original equipment springs in 10 round mags. I think cz knew rami needed heavy springs but did not go far enough. Good luck. Link. Remember the full size mag springs and pull down menu to get +10% power.
https://www.gunsprings.com/CZ/75%20Series/cID1/mID16/dID91#842

Got it thanks.

Offline MeatAxe

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Re: RAMI nose dives from mags
« Reply #8 on: November 13, 2018, 02:52:06 AM »
You?ll notice that the Rami has a markedly steeper feed ramp on its barrel than the CZ75 (e.g. a P-01),which is probably the main culprit with flat nosed HPs. Heavier mag springs and new recoil springs may help but may not eliminate the problem 100%.

For the Rami I switched from the sharp edged, flat nosed Barnes TAC bullets to the more rounded (new) Corbon DPX.

Offline Walt Sherrill

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Re: RAMI nose dives from mags
« Reply #9 on: November 13, 2018, 11:09:31 AM »
Quote from: aussie57
Bullet shape of the conical JHP causing the issue are my thoughts too. Does Mecgar make those mags for the RAMI? I am gonna pick some of the Mecgar BLue round follower mags up for my CZ75. Anyone got a link with a decent deal? BTW thank you for all the replies. Nice to bounce thoughts around and get other perspectives.

I suspect that the only effect you'll see by changing out the RAMI followers is to watch the transfer money from your pocket to Mec-Gar's (if you can get the followers from Mec-Gar), as I don't think  followers have much effect on how the round hits the feed ramp.   

I would argue, as others have, that you simply need to change the shape of the hollowpoint bullet you use to something a bit more rounded than conical.

Offline frogwalking

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Re: RAMI nose dives from mags
« Reply #10 on: November 15, 2018, 02:46:47 PM »
My Rami did exactly the same thing.  I was not willing to sacrifice my preferred ammunition in order to carry a particular gun.  I sent mine back to CZ twice.  Now it has fired over a thousand rounds of various ammunition types with no malfunctions of any kind.  It works fine with any correct magazine.  This gun has great potential, but is manufactured to a price.  Don't accept sub par performance.  Don't fiddle with it.  Send it to CZ and they will fix it.

Offline aussie57

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Re: RAMI nose dives from mags
« Reply #11 on: November 15, 2018, 05:28:43 PM »
My Rami did exactly the same thing.  I was not willing to sacrifice my preferred ammunition in order to carry a particular gun.  I sent mine back to CZ twice.  Now it has fired over a thousand rounds of various ammunition types with no malfunctions of any kind.  It works fine with any correct magazine.  This gun has great potential, but is manufactured to a price.  Don't accept sub par performance.  Don't fiddle with it.  Send it to CZ and they will fix it.

I've owned this gun for 12 years and put thousands of rounds down the pipe. I doubt CZ will want to fix it at this juncture. But all is not lost as I reload so I can change the bullet profile.

Offline Husky629

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Re: RAMI nose dives from mags
« Reply #12 on: November 15, 2018, 08:43:48 PM »
My RAMI would do the same with HST's with the 14 round magazine.   I went to the +10% full size magazine spring, and it was almost 100%, but still the occasional catch on the feed ramp.  I went to 124 gr +P Gold Dots and the feed ramp catching went away.

Offline Mastodon

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Re: RAMI nose dives from mags
« Reply #13 on: November 17, 2018, 08:28:59 PM »
I agree with changing the magazine spring.  There has been a little bit of history over the years of the 14 round mags and switching to stronger spring.   Many years back I bought an extra 14 rnd mag and had feed issues unique with it. Switched springs (as mentioned above) and it took care of it.


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Offline aussie57

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Re: RAMI nose dives from mags
« Reply #14 on: November 21, 2018, 04:07:25 PM »
Shot the RAMI with a different more rounded bullet profile today and it ran without any issues. Here's where it gets interesting though. I re-tried the offending flat nose conical hollow point rounds that were the perceived culprit on prior outings and the RAMI ate those too without any stoppages. It digested over a hundred of them in different magazines even the older ones that I thought may have been causing the issue. Go figure.  :-\ Some days things just don't make any sense. On a positive note the RAMI has a new recoil assembly and extended mag courtesy of CGW. I guess I will continue to avoid the conical bullets and stick with a more rounded bullet profile but it's mind boggling that now I can't reproduce the issue with the offending bullets.   

 

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