Problem with Coated Bayou bullets in 9mm 124gr

[robinzon]

I got an odd problem. Sometime ago I got a batch of Bayou Coated bullets in 9mm 124gr round nose. I loaded them today, they pass my Wilson gauge (not a sizing issue) I got to the range and the round won't chamber. When I got home I loaded same brass with a 124gr FMJ it chambers wo a problem. Granted this is Tisas Zigana turkish pistol, I have not tried to chamber into say my Glock. I have loaded coated bullets before (Blue Bullet) have not had a problem. Has anyone has any issues with these, perhaps this batch did not get resized? I will certainly try it with a different barrel, though its a pistol.... so come on...

 

[Zero333]

You can get an idea of the diameter of the bullets with your calipers. Micrometer is better, but dial calipers will show you weather they're fat or not. Usually they're .356".. Put the loaded round on a flat surface (back of the calipers works) and look if the round has a excessive bulge (middle of the brass will arc away from the flat surface. I try to get the loaded round brass as straight as possible, even tho it's not possible to get the brass 100% straight on a loaded round.
The more you apply a taper crimp the more bulge you'll get.
So ease off the taper crimp if you have a big bulge.

Otherwise I wonder if you have a tight bore or something... maybe seating the bullets a little deeper will do the trick ???

I hope you can put that chamber gauge away for all eternity and use the firearms chamber to check proper chambering.

 

[robinzon]

I measured the rounds and the heads. The difference in the coated head diameter is .02mm ... ie they are .355 vs .3545 or something of the sort.. the difference is still under .356 and after crimping the coated round is under the diameter of an FMJ uncrimpted round which chambers. I am guessing its the barrel, I will pull out my other 9mms to see how that works. Very odd still

 

[std7mag]

They are too long for your chamber.

Forget the case gauge.
Take the barrel out of your gun & do a plunk test.
I have found i need to do this for most of the 9mm i load for. Chambers seem to be shorter than advertised.

 

[robinzon]

They are too long for your chamber.

Forget the case gauge.
Take the barrel out of your gun & do a plunk test.
I have found i need to do this for most of the 9mm i load for. Chambers seem to be shorter than advertised.

Ha... that is NOT the case... I seated it down quite a bit and that only improved things slightly... that was my first thought... the 124gr FMJ
is seated quite a bit longer (actually at 1.150 vs. 1.125 on the coated).... its odd..
I mean saami spec of 1.169 max is far longer... Factory run around 1.140... dunno I will see what my other barrel does

 

[std7mag]

Drop your powder charge a couple of tenths & go shorter.

I'm still betting it's too long.

The bullet shape & factory chamber are the issue.
Bullet itself is probably hitting the lands in your barrel.

Try sticking to SAAMI length using a Sierra JHP.
Hint, it's not gonna happen!

Do a dummy round, put in your pistol and let the slide close slowly. If it's too long, the slide won't close all the way.

If you just drop the slide, it may close, but if you try to eject it, the bullet will stick in the lands.

 

[robinzon]

Drop your powder charge a couple of tenths & go shorter.

I'm still betting it's too long.

The bullet shape & factory chamber are the issue.
Bullet itself is probably hitting the lands in your barrel.

Try sticking to SAAMI length using a Sierra JHP.
Hint, it's not gonna happen!

Do a dummy round, put in your pistol and let the slide close slowly. If it's too long, the slide won't close all the way.

If you just drop the slide, it may close, but if you try to eject it, the bullet will stick in the lands.

Yeah I been through all of that it does indeed seem to be a bullet issue... I never had that issue with Blue Bullet coated bullets and
from what reviews I read Bayou has been a good head.... of course I can load Berry's etc... but when last few months few FMJs
were available I got these as a backup... I of course have other heads .... but they at least should warn people and/or recommend OAL
for their bullet... I have not seen any posts as to this specific head.

 

[robinzon]

@std7mag You have a valid point, I just read this post:

https://czfirearms.us/index.php?topic=86540.15

and indeed MAX OAL becomes 1.07 so yeah I think I will have to seat them really short, must be the oversized profile.

 

[robinzon]

So seems I solved the problem... thanks for a couple of tips here and some research elsewhere I seated them down to 1.085 and they chamber just dandy!

 

[std7mag]

I looked at mine. I'm running 124gr XTP, and due to their shape, 115gr Sierra JHP at 1.055".
This for 3 different Springfield XDS, and my Walther PPS & Taurus 24/7 OSS.

Any longer and if you try to eject a round, the slide doesn't want to come back due to the bullet being jambed in the barrel.

Obviously with the powder charge dropped accordingly.

 

[robinzon]

You should not need to decrease the load necessarily it’s will be compressed.. I am using CFE pistol at 4.9 ... is the powder you are using highly volumetric... it’s ok and beneficial to compress the load ....

 

[Mikemci]

Wilson chamber gauge also checks OAL. Are you saying that the "bullets" were not past the length of the gauge?
Edit: Head in USA has a whole different meaning. ;-)

 

[robinzon]

Wilson chamber gauge also checks OAL. Are you saying that the "bullets" were not past the length of the gauge?

As was pointed above Wilson's OAL is irrelevant if the shape of the bullet as such that it engages the lands and grooves early. Cast bullets have to be seated deeper. Looking at LEE manual some cast bullets reference minimum OAL of 1.020 or something of the sort some 1.10 etc... so yes they were not passed WILSON OAL I did not quite realize these are standard casts coated... blue bullets I had that were also coated were much less aggressively shaped closer to a regular FMJ.. go figure..

 

[Mikemci]

As was pointed above Wilson's OAL is irrelevant if the shape of the bullet as such that it engages the lands and grooves early. Cast bullets have to be seated deeper. Looking at LEE manual some cast bullets reference minimum OAL of 1.020 or something of the sort some 1.10 etc... so yes they were not passed WILSON OAL I did not quite realize these are standard casts coated... blue bullets I had that were also coated were much less aggressively shaped closer to a regular FMJ.. go figure..

Got it!

 

[std7mag]

Compressed with some powders is ok.
But not all.
Due to the small volume pressures can increase dramatically.

For the record i usually use Ramshot True Blue or Silhouette.