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Tight in chamber after neck sizing...
#6898492
09/25/17 08:14 PM
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Joined: Aug 2017
Posts: 6
Walker_clint
OP
Green Horn
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OP
Green Horn
Joined: Aug 2017
Posts: 6 |
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.
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Re: Tight in chamber after neck sizing...
[Re: Walker_clint]
#6898495
09/25/17 08:17 PM
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Joined: Oct 2004
Posts: 39,542
redchevy
THF Celebrity
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THF Celebrity
Joined: Oct 2004
Posts: 39,542 |
Were they all fired in your rifle previously?
It's hell eatin em live
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Re: Tight in chamber after neck sizing...
[Re: Walker_clint]
#6898506
09/25/17 08:25 PM
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Joined: Sep 2009
Posts: 18,946
ChadTRG42
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Joined: Sep 2009
Posts: 18,946 |
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
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Joined: Aug 2017
Posts: 6
Walker_clint
OP
Green Horn
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OP
Green Horn
Joined: Aug 2017
Posts: 6 |
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?
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Re: Tight in chamber after neck sizing...
[Re: Walker_clint]
#6898526
09/25/17 08:46 PM
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Joined: Sep 2009
Posts: 18,946
ChadTRG42
THF Celebrity
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Posts: 18,946 |
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.
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Re: Tight in chamber after neck sizing...
[Re: ChadTRG42]
#6898568
09/25/17 09:32 PM
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Joined: Aug 2017
Posts: 6
Walker_clint
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Green Horn
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OP
Green Horn
Joined: Aug 2017
Posts: 6 |
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"....
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Re: Tight in chamber after neck sizing...
[Re: Walker_clint]
#6898631
09/25/17 10:27 PM
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Joined: Aug 2006
Posts: 11,657
colt45-90
Texas colt45
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Texas colt45
Joined: Aug 2006
Posts: 11,657 |
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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