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 Post subject: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Tue Jul 26, 2005 3:08 pm 
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I posted this because I see almost every week in some forum someone asking about removing the dimples from 870 Express' magazine tube when they are installing magazine extensions. They have to be removed some way so the extension tube works. This is the way I prefer. Here is it step by step with pics.

To remove the dimples from an Express mag tube you need these:
-hammer,
-socket from you socket wrench set thats outside diameter is 7/8",
-some lubricant (CLP or engine oil or anything),
-1/4" punch or bigger


Follow the instructions of your owners manual to remove the barrel and magazine spring:


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Lubricate the inside of the tube where the dimples are:
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Punch the socket with the hammer carefully into the tube. Note! Don't let it get too deep 'cause it's really hard to get it out of there. Punch it in and take it out a couple of times and you'll notice after every time it's moving easier. You might have to use pliers to get the socket out the first time.
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When you have flattened the dimples as much as you can with the socket,
Leave the socket inside the tube right where the dimples are/were. Take the 1/4"punch and the hammer and tap the sharp edges of the dimples flat.
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At the end, take the mag follower and move it back and forward to see there really is nothing on its way.

I recommend to get the old style magazine spring retainer if you don't install extension but it's not necessary.

Image

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Last edited by Wetterman on Mon Feb 08, 2010 3:52 pm, edited 3 times in total.

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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Tue Jul 26, 2005 3:09 pm 
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PICS.. yeah right. What's wrong???


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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Tue Jul 26, 2005 7:03 pm 
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no need for 2 sets of pics, gad you got it straightened out


Last edited by cmb3366 on Sat Jul 30, 2005 10:48 am, edited 1 time in total.

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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Tue Jul 26, 2005 9:19 pm 
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Interesting, but why would you want to do this?

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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Tue Jul 26, 2005 9:20 pm 
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why would you want to remove those?

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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Tue Jul 26, 2005 10:13 pm 
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I would think he wants to install a magazine extension. The dimples stop the shells from moving further up the mag tube.

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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Tue Jul 26, 2005 10:50 pm 
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oh that makes sense. good job on it, it looks like there hasnt been any in there in the first place.

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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Sat Jul 30, 2005 6:46 am 
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Excellent! I was thinking of doing something very similiar, but I hadn't thought of a socket. A buddy of mine is a metal finisher and he suggested steel rod, but the socket is the way to go. I didn't like the idea of two holes in the magazine tube, even if they are covered up.

Thanks!!!


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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Sat Jul 30, 2005 11:45 am 
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No problem.. I did the drilling to my other express and it's not what I consider gunsmithing of any kind. I did the next one with the socket and it turned out great and was easy as hell. That's why I wanted to share.


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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Fri Aug 19, 2005 5:12 pm 
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Joined: Tue Aug 17, 2004 3:43 pm
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you can also use a dremel and grind them down (from the inside) that is the way my new 8 shot was done when I bought it (express deer someone put an ext. on)


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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Wed Aug 31, 2005 12:28 pm 
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Joined: Wed Feb 18, 2004 11:03 am
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Location: Seattle, WA
Grind them down from the inside??? I think not.
I'm sure a socket will work but remember you will be screwed if you bend the magazine tube or crack the solder joint. The magazine tube supports the slide and action bars and, if bent, your action will bind up.

There is a tool made to do this job right:
Brownells p/n 080-870-206 magazine tube dent raiser. Plus you won't have to sacrifice a perfectly good socket from your tool case. All this fuss to add a 2 round magazine extension??
Give me a break!

-L


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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Wed Aug 31, 2005 3:49 pm 
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Lazarus wrote:
Grind them down from the inside??? I think not.
I'm sure a socket will work but remember you will be screwed if you bend the magazine tube or crack the solder joint. The magazine tube supports the slide and action bars and, if bent, your action will bind up.

There is a tool made to do this job right:
Brownells p/n 080-870-206 magazine tube dent raiser. Plus you won't have to sacrifice a perfectly good socket from your tool case. All this fuss to add a 2 round magazine extension??
Give me a break!

-L


WOW! the guy comes us with a decent way to do something and you piss in his Wheaties? Sure there is a tool to do it but maybe he did not know it existed. You could have stated all the facts you did without the opinionated angst against his home method.

:roll:
mcb

Edit: Wow the tool is over $70 dollars and he is going to use it once. The socket method is looking even better.


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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Thu Sep 01, 2005 3:38 am 
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Lazarus:
I suppose You haven't tried that? Seems like you don't know that you don't have to use a lot of force to take down the dimples. Just a little tapping with a little hammer, even a 8oz hammer will do. If you were a little handy man at all you wouldn't ruin the receiver. The mag tube is attached quite firmly and if you can get it looose or even think there was a possibility to that then I suggest Forget About It.
I've personally found that way the easiest to get rid of the dimples. It's not even as messy as would be with a dremel or drilling them.
Do not come here making attacks if you think you can't or won't do it.


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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Thu Sep 08, 2005 10:51 pm 
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Joined: Mon Sep 05, 2005 4:54 pm
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Location: Spanaway, WA
Wetterman,

I just used your technique for removing the dimples. It worked great! I did find the socket hard to remove, even with a deep socket. I had to grab the socket with pliers to get it out.

But, all in all, it is a great "do it yourself" trick. And it sure beats spending $75 for the Brownells tool (which just looks like a steel bar with a tapered end).

Thanks!


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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Sat Sep 10, 2005 12:58 pm 
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Joined: Thu Aug 11, 2005 8:19 am
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Wetterman,

I am trying your technique on my 870 Express super Magnum. I used a 7/8" OD socket, but it seems to be too small. The next size I could find was about too large, it will start in the tube but I am afraid if I force it I will expand the tube and the extension will not scew on. I have raised the dimples but not enough and the smaller socket is not tight enough to peen out the dimples. Any ideas?


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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Sat Sep 10, 2005 5:22 pm 
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Try with the smaller socket and then try to use the punch to flatten them. Don't go with the oversized socket.


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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Sun Sep 11, 2005 10:48 pm 
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Thanks! I got a little more aggressive with the punch and they came out. Sure beats buying a tool! It also beats drilling holes or filing.


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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Wed Oct 05, 2005 4:31 pm 
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Joined: Wed Oct 05, 2005 4:26 pm
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Location: Not sure....
I just used a hybrid of your technique and the dremel on my 870 super magnum. I found that I had a socket that was very close, but wasn't quite right. So I grabbed my dremel and finished the job. At the same time I installed the high visibility follower from Scattergun Technology, a smart upgrade for cheap. I knew I was done when the new follower dropped through and didn't catch at all. The new follower lets me know at a glace if that's a round or I'm empty. Now I've got 7 in the tube and one in the pipe.

870s rule the world!

Chris


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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Mon Feb 08, 2010 9:20 pm 
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All sockets are not the same size, even for the same size nut/bolt. Measure. If you have to buy one It's waaaaay cheaper than a special tool.

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 Post subject: Re: HINT: How To Remove Dimples From 870 Express - (PICS)
PostPosted: Tue Feb 09, 2010 1:20 pm 
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Wetterman, Thank you very much! I have been thinking about removing the dimples on my Express, but I also didn't like the idea of having holes in the tube. Your idea looks like it will work quite easily. Thanks for taking the time to share.

Now, off to the garage.

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