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Necks Moving Forward During Reloading

 
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  #1  
Old 05-31-2010, 01:14 PM
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Necks Moving Forward During Reloading


Full length resized once fired Winchester 7WSM brass, length to shoulder increases after full length resizing? Has anybody else had this problem of cases not being able to chamber after full length resizing?

Picked up a Howa 7WSM as project gun. Purchased 60 rounds of Winchester 7WSM 150 grain ammo and a set of full length Hornady 7WSM reloading dies. I shot the Winchester ammo with expected results, shot two to three inch groups, last group surprised me at 1.25. Deprimed the once shot brass with a RCBS universal deprimer. Cleaned brass in Lyman tumbler. Lubed the cases. Lubed the inside of the neck with graphite. Set up the die as per directions with Hornady die just about touching the shell holder. Resized case with degree of difficulty, checked case length which was 2.1 shoulder moved forward .003 to .004 inches. Tried a number of different options, backed die way out, pulled off the expander with same results. The Winchester ammo cambers Ok as does Federal ammo. Neck moves forward instead of back? I just do not get it?
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Old 05-31-2010, 04:07 PM
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Re: Necks Moving Forward During Reloading

[QUOTE=tgh97531;395724]
Full length resized once fired Winchester 7WSM brass, length to shoulder increases after full length resizing? Has anybody else had this problem of cases not being able to chamber after full length resizing?

Set up the die as per directions with Hornady die just about touching the shell holder.



it sounds like you need to adjust the sizing die ,closer to or touching the shell holder . that will bump the shoulder back a little more . Jim
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Old 05-31-2010, 04:17 PM
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Re: Necks Moving Forward During Reloading

When you FL resize, it is pushing the case body in, changing your OAL, which is pushing the shoulder/ neck forward. Just screw your die down in order to bump the shoulder back, then trim the neck if you need to for your chamber length.
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Old 05-31-2010, 08:25 PM
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Re: Necks Moving Forward During Reloading

What they said. You aren't touching the shoulder and need to screw the die in more till the brass chambers. Just don't over do it. I will set the die to bump the shoulder back enough that I can slightly feel the brass headspacing in the chamber. Then set my die there and leave it. Customize it to that specific rifle's chamber.
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Old 05-31-2010, 09:50 PM
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Re: Necks Moving Forward During Reloading

Think of it like a baloon, when you start sizing the case body it will squeeze it like a baloon and push the shoulder out.

Like the others said, you need to adjust your die further in so that it sizes the case body AND contacts the shoulder to push it back.
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Old 05-31-2010, 11:44 PM
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Re: Necks Moving Forward During Reloading

It is still bumping the shoulder forward. I adjusted die all the way down, shoulder is .003" forward and cannot close bolt on case. I will wait on Hornady to send replacement die.
Thanks
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Old 06-01-2010, 03:55 AM
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Re: Necks Moving Forward During Reloading

I had this happen to me one time. Have a friend in a machine shop and he took a 1/4" off the bottom of the die. Works great now.

You can also take a few thousands off the top of the shell holder with a grinder, files won't work because it is hardened metal.
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