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10 gauge resized shells will not chamber
Unread 02-21-2017, 03:49 PM   #1
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bob weeman
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Default 10 gauge resized shells will not chamber

Chedditte cases will not chamber even after revisiting in mec 600. Press goes all the way to the bottom on the resizing station. They will not chamber either empty or loaded? Some chamber but most do not. 3rd loading for them...maybe 4th for some. They drop in easily. The gun will almost close and it seems like it is rim thickness? Thoughts?
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Unread 02-21-2017, 03:55 PM   #2
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Since my tens seem to vary in chamber size. With the British one being the largest - those actually would not fit in the mec jr resizing station

I bought a MEC super sizer in 10 and run all the empties through that first

Problem solved
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Unread 02-21-2017, 04:06 PM   #3
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If you look at the rim it will be rounder and not flat as it should be. Each shot deforms it a little each time until it goes to far and will not allow gun to close. I have tried readjusting my mec to flatten this out, but still does not work. The only way I know how to solve is by limiting your reloads to 1 or 2 times. Hope this helps, Dave
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Unread 02-21-2017, 05:59 PM   #4
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You might try adjusting your decapping pin, so that it just pushes out the primer without putting to much pressure on the base around the primer pocket.
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Unread 02-21-2017, 07:26 PM   #5
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The operative gremlin in Mr. Weeman's predicament is the brand "Cheddite." If he were to switch to Federal hulls, his problem may disappear. Or at least take longer to manifest itself.
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Unread 02-21-2017, 08:59 PM   #6
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I have not tried Cheddite hulls in 10ga. What I do know is Federal is all brass, Remington and Winchester have steel in them. The steel hulls are tough on the resizing rings. I recently changed the resizer ring on my Versamec and I see a big difference. Shells that would not allow me to close guns with tighter chambers than my Parker will now close without problem.

How old/how much use has your 10ga resizing ring seen? If it's a lot or I don't know I would get a new one.

The stand alone Super Sizer works well too, but with the new resizing ring I won't be needing it as much.

http://www.ballisticproducts.com/MEC...tinfo/1308465/

PS. I have not seen Federal 10ga hulls available anywhere lately. Remington would be my next choice.
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Unread 02-21-2017, 10:16 PM   #7
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Resizing lube helps the resizing rings on the MECs. Otherwise it is metal on metal with shavings. Try some One-Shot sprayed in there every so many shells. Cheddites are made with notoriously thin metal. You have to use a MEC Super-sizer for them.
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Unread 02-22-2017, 05:04 AM   #8
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My Mec sizer is new and has had maybe 1000 rounds through it. I will try some lube and I think I will get a super sizer. Chedditte was all I could find but I will switch as soon as I can find some Federal or Remingtons. Thank you all for your help. Greatly appreciated!
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Unread 02-22-2017, 10:26 AM   #9
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i shot some old peters victor sureshot shells i then reloaded them and i have had the same problems mentioned here..they went in gun good before being fired...charlie
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Unread 02-22-2017, 07:06 PM   #10
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I have been using Cheditte hulls in the short ten with no issues, I do run them through a MEC super sizer each time before reloading. Some have been reloaded 4 or 5 times. Carvel
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