tokerav problem

[smokndav]

Hi guys, hope this photo shows up. Shooting S&B ammo in my polish T33 gives this result on the primer. Seems to hit in center and then gouges the edge. Never seen this before. Any ideas?

<a href="http://s1075.beta.photobucket.com/user/smokndav/media/762brass004_zps64286a9d.jpg.html" target="_blank"><img src="http://i1075.photobucket.com/albums/w437/smokndav/762brass004_zps64286a9d.jpg" border="0" alt="7.62 brass photo 762brass004_zps64286a9d.jpg"/></a>

Edited February 17, 2013 by smokndav

[bucnball]

Is the S&B the only ammo you've tried ? I've got some  CZ- 52  military rounds you could try (some guns are ammo sensitive) ..Could  meet you @ the show next Saturday and swap say 5 or ten rounds ..PM me ! Bucnball

[Dolomite_supafly]

Might try cleaning the firing pin channel to make sure the firing pin can retract or get a new firing pin spring if they have one.

 

Dolomite

[smokndav]

I think I have found the problem. Took the barrel out and dropped one of the S&B rounds into the chamber. It has a very noticeable side to side movement with my finger. Tried it with a surplus round and no movement. Have some new starline brass and it also has no movement. The S&B case diameter is about 3.5 thou less than the others. I will fire the gun tomorrow with both the surplus and S&B for a side by side comparison.

[smokndav]

well it seems the loose fitting S&B ammo is not the  problem. Shot some surplus today with aprox. the same results. Not quite as much gouging but some none the less. Will take another look in a few days.

[Dolomite_supafly]

Have you dond what I suggested?

There can be a lot of crude as well as grease in the deepest recesses of combloc guns.

You could use WD-40 to clean if out the use air to blow thd WD-40 out.

[smokndav]

I think I checked it very good for crud but will do so again when it comes apart for another look. Thanks for the tip.

[peejman]

I can't really tell from the pics but you may be experiencing what I've heard called "primer wipe".  Its when the firing pin is still protruding slightly during ejection.  When the ejector forces the case out the firing pin drags across the primer resulting in a gouge. 

 

 

 

 

Check for a sticky firing pin or broken firing pin spring (if so equipped).  It may very well be normal.

Edited February 19, 2013 by peejman

[smokndav]

never heard of primer wipe but it sure seems to be the problem. Your photo on the right is exactly what my spent rounds look like. I had the FP out and the spring looks good (maybe weak?) and cleaned the FP cavity. Dropped the FP in and it seemed to be free to move without the spring. I will try either a stronger spring or maybe stretch the spring for faster return.

Do you shoot at Gunny's ? I shoot there most every Sat. morning at 9.

thanks for the info.

[peejman]

never heard of primer wipe but it sure seems to be the problem. Your photo on the right is exactly what my spent rounds look like. I had the FP out and the spring looks good (maybe weak?) and cleaned the FP cavity. Dropped the FP in and it seemed to be free to move without the spring. I will try either a stronger spring or maybe stretch the spring for faster return.

Do you shoot at Gunny's ? I shoot there most every Sat. morning at 9.

thanks for the info.

 

 

It's not uncommon.  Have a look at this...  http://www.kegisland.com/firing-pin-wipe.html

 

I shoot at Gunnys (or anywhere else) on rare occasions.

[Dolomite_supafly]

Stretch the spring by hand and see if the problem goes away. If it does then grab a new spring.

 

Dolomite

[smokndav]

I ordered new springs from Wolff spring today. Have used their springs many times with good results. And they are reasonably priced.

thanks much to peejman  and others for all the help. This forum is great.