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Mar 25th, 2012
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Tight in chamber after neck sizing... #6898492
09/25/17 08:14 PM
09/25/17 08:14 PM
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Posts: 6
Mount Pleasant
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Walker_clint Offline OP
Green Horn
Walker_clint  Offline OP
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Mount Pleasant
New to the forum, but not necessarily reloading. Question is, I have been fire forming some .338 lapua brass (Lapua headstamp), and after the first neck size and trim, some of the cases seem awfully tight when chambering, and I'm no where near touching the lands, is that normal? Do I need to get some bump dies and bump the shoulder, or will it hurt to fire them tight? They extracted fine, just a little tight, but not like an over pressure tight.

Re: Tight in chamber after neck sizing... [Re: Walker_clint] #6898495
09/25/17 08:17 PM
09/25/17 08:17 PM
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Texas
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redchevy Online content
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Texas
Were they all fired in your rifle previously?


It's hell eatin em live
Re: Tight in chamber after neck sizing... [Re: Walker_clint] #6898506
09/25/17 08:25 PM
09/25/17 08:25 PM
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Lewisville, TX
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ChadTRG42 Offline
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That's the risk you take neck sizing. In theory, once the brass is "fire formed" to your chamber, the brass is perfect and all you need is a neck size to hold the bullet in place. In reality, you will have cases that will chamber tight or not chamber at all when neck only sizing. If you neck only size, you will want to chamber check each piece of brass to make sure they chamber properly. If they don't, you will need to size the case body and shoulder some. You can FL size them, or do a partial shoulder bump of about .002"-.004" and this will solve your tight chamber issues. Just chamber check the brass after sizing to make sure they go in without resistance.



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Re: Tight in chamber after neck sizing... [Re: Walker_clint] #6898513
09/25/17 08:37 PM
09/25/17 08:37 PM
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Mount Pleasant
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Walker_clint Offline OP
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Can a I just back a FL die off to bump the shoulder back a couple thousandths? Or do I need a bump die specifically?

Re: Tight in chamber after neck sizing... [Re: Walker_clint] #6898526
09/25/17 08:46 PM
09/25/17 08:46 PM
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ChadTRG42 Offline
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Originally Posted By: Walker_clint
Can a I just back a FL die off to bump the shoulder back a couple thousandths?


^^^ Yes, that should work. But you have to measure the head space of the shoulder to know how much you are bumping it. In doing this, you are sizing the brass short. You can also have chamber issues related to the case web area being to wide at some point. After sizing, you need to chamber check the brass in your rifle to make sure it is working and not a tight fit.



Custom and Precision Ammunition!!
www.DallasReloads.com
Type 01 and Type 06 FFL
Re: Tight in chamber after neck sizing... [Re: ChadTRG42] #6898568
09/25/17 09:32 PM
09/25/17 09:32 PM
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Mount Pleasant
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Walker_clint Offline OP
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Is it worth neck sizing as compared to FL? My load I've developed was shooting under Moa@200 yards, groups at 600 are around 4-5"....

Re: Tight in chamber after neck sizing... [Re: Walker_clint] #6898631
09/25/17 10:27 PM
09/25/17 10:27 PM
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bastrop county
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colt45 Offline
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welcome, you can get all the info you need here, some you may not want.


hold on Newt, we got a runaway
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