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 Post subject: Unique Des/69-U issues
PostPosted: Tue Mar 14, 2017 6:46 pm 
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Joined: Mon Apr 23, 2007 8:42 pm
Posts: 35
Location: British Columbia
Experiencing a intermittent fail to feed problem, after shooting 4 of 5 rounds from the clip, the 5th round chambers but the hammer doesn't cock.
Only using CCI sv.
Anyone experienced this?


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PostPosted: Tue Mar 14, 2017 7:08 pm 
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Joined: Fri Nov 25, 2005 11:46 am
Posts: 415
Location: Western Washington State, USA
Greetings,

A "shot in the dark"; but, here goes.

Has the barrel weight slid rearwards touching the recoil spring guide rod?

My old Unique did strange things when this happened.

Another thought, does the gun function correctly with other brands of ammo?

Cheers,

Dave


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PostPosted: Tue Mar 14, 2017 10:19 pm 
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Joined: Mon Aug 18, 2008 3:32 pm
Posts: 235
Location: Airdrie, Alberta, Canada
Check that the sear engagement is adequate - that's the screw reached through the hole in the back of the grip. The other alternative would be that the take up is set too close. The system works best as a two stage though it can be set as single stage mine tends to get erratic in that mode.

Dr Jim


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PostPosted: Wed Mar 15, 2017 1:28 pm 
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Joined: Mon Apr 23, 2007 8:42 pm
Posts: 35
Location: British Columbia
Thanks Dave but I only use SV, also I have always installed the weight touching the rod from new, tried a gap once and only had problems.

John
[quote="fc60"]Greetings,

A "shot in the dark"; but, here goes.

Has the barrel weight slid rearwards touching the recoil spring guide rod?

My old Unique did strange things when this happened.

[color=#4000FF]Another thought, does the gun function correctly with other brands of ammo?[/color]

Cheers,

Dave[/quote]


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PostPosted: Wed Mar 15, 2017 1:46 pm 
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Joined: Mon Apr 23, 2007 8:42 pm
Posts: 35
Location: British Columbia
Jim
The sear engagement wasn't so light that the hammer dropped when the slide "slammed" home but only took one turn to the right to drop the hammer so I have moved back three clicks and will be heading to the range shortly to test the settings, also had cleaned and lubed the gun (hope Jim Lee isn't reading this) so I need to put a box or two downrange before tomorrows match.
Interesting that this 69/U doesn't have the usual grips that my 69 comes with, so no hole in the rear of the grip and no adj heel just a fixed one, luckily the grip fit me just the way it arrived from TEC, and the two stage trigger works well for me.

Cheers, John.



[quote="Dr. Jim"]Check that the sear engagement is adequate - that's the screw reached through the hole in the back of the grip. The other alternative would be that the take up is set too close. The system works best as a two stage though it can be set as single stage mine tends to get erratic in that mode.

Dr Jim[/quote]


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PostPosted: Thu Mar 16, 2017 9:24 am 
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Joined: Thu Mar 16, 2017 8:41 am
Posts: 31
Location: Brittany/France
Hello,
I'm new here, on the forum and I've been shooting a DES69U for quite a while now. My best results are when using RWS Pistol Match. My colleagues worst results are when shooting American Eagle ammo.
It is difficult to move the barrel weight forward and not touching the spring rod. I drilled a little bit the weight to avoid contact.
Jacques/France


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PostPosted: Thu Mar 16, 2017 12:23 pm 
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Joined: Mon Mar 28, 2005 2:48 am
Posts: 1181
Location: New Zealand
Has the recoil spring and mag spring ever been replaced?

If not they could be the problem (might be 40years old) and should be replaced.


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PostPosted: Fri Mar 17, 2017 8:10 am 
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Joined: Thu Mar 16, 2017 8:41 am
Posts: 31
Location: Brittany/France
Hello,
On the DES 69 U there is a modification on the recoil spring. That enhancement consists in having 2 springs one inside the other to avoid the slide banging into the gun frame. I'm gonna put a few pics in here.


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PostPosted: Fri Mar 17, 2017 8:21 am 
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Joined: Thu Mar 16, 2017 8:41 am
Posts: 31
Location: Brittany/France
I cannot add pics for the moment....I don't know why....


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File comment: Hole in the front weight
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WP_20170317_13_52_19_Pro.jpg
WP_20170317_13_52_19_Pro.jpg [ 236.51 KiB | Viewed 942 times ]
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PostPosted: Sat Mar 18, 2017 3:05 pm 
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Joined: Mon Apr 23, 2007 8:42 pm
Posts: 35
Location: British Columbia
Wouldn't an extra spring just prevent the slide from recoiling all the way back and give me more problems.
I wonder if this was done to allow the use of High Velocity ammunition .
Thanks for the photos, do you know who recomended the two mods?

Regards. John.

[quote="astigmat2000"]Hello,
On the DES 69 U there is a modification on the recoil spring. That enhancement consists in having 2 springs one inside the other to avoid the slide banging into the gun frame. I'm gonna put a few pics in here.[/quote]


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PostPosted: Sat Mar 18, 2017 11:30 pm 
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Joined: Mon Aug 18, 2008 3:32 pm
Posts: 235
Location: Airdrie, Alberta, Canada
I knew this double spring setup was common for the 32U but I didn't know it was used on the 69 U as well. I will have to set it up and see how it works. The extra buffering and a little extra push forward would speed up slide cycling as well. Thanks!

Dr Jim


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PostPosted: Sun Mar 19, 2017 4:12 am 
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Joined: Thu Mar 16, 2017 8:41 am
Posts: 31
Location: Brittany/France
Hello,
This modification was an update made when your gun went to Unique factory for maintenance. It was a while ago before they close the Company in Hendaye (South-west of France). Now the gunshop selling parts is http://armureriefmr.com
I will try to find info on that spring modification. It is a similar function as the recoil rubber device I installed on the rod of my Colt .45 to avoid chock on the frame.
Have a good Sunday...
Jacques


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PostPosted: Sun Mar 19, 2017 11:19 am 
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Joined: Mon Apr 23, 2007 8:42 pm
Posts: 35
Location: British Columbia
Was keeping the weight clear of the rod a factory recomendation, so drilling the weight something the factory started doing or others?

Regards, John


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PostPosted: Sun Mar 19, 2017 3:33 pm 
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Joined: Mon Aug 18, 2008 3:32 pm
Posts: 235
Location: Airdrie, Alberta, Canada
John, most of us with uniques have found that the gun starts to spray rounds erratically when the rod touches the weight. For thirty plus years I've regularly checked to make sure there is a gap, and I have had it go erratic during matches - early years - and had to readjust between strings. Like Jacques I've bored a hole in the weight to keep it out of contact. The full length weights butt against the receiver bridge and the rod cannot touch in that case. Your experience may differ of course!

Cheers


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PostPosted: Sun Mar 19, 2017 5:36 pm 
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Joined: Mon Apr 23, 2007 8:42 pm
Posts: 35
Location: British Columbia
Jim, just looked at both my Uniques and it looks like by drilling into the weights to clear the rods will allow the weights to rest against the forwade end of the frame, is this what you are calling the bridge, this would also mean the slide hits the weight and remains open 1/8 to 1/4".

Thanks, John


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PostPosted: Sun Mar 19, 2017 6:02 pm 
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Joined: Mon Aug 18, 2008 3:32 pm
Posts: 235
Location: Airdrie, Alberta, Canada
Well you don't want it to do that! Variations! Oh My!

Cheers


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PostPosted: Tue Mar 21, 2017 6:11 pm 
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Joined: Mon Apr 23, 2007 8:42 pm
Posts: 35
Location: British Columbia
This should show that if I bore the weight and allow it to move back against the frame it will let the slide touch the weight and not close.
Are other 69 U different. John


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