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Help getting sized 1x fired brass to fit in chamber

 
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  #1  
Old 07-29-2010, 09:46 PM
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Help getting sized 1x fired brass to fit in chamber

I picked up 100 rounds of 1 x fired 300 Win Mag brass at a gunshow recently. I ran it all through my RCBS die and it is very difficult to chamber. There is a polished area all around the case just in front of the band.

It seems like my chamber is a bit tight or my die is a bit loose.

What can I do? Would I be better off buying new brass?

Thanks.
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  #2  
Old 07-30-2010, 08:54 AM
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Re: Help getting sized 1x fired brass to fit in chamber

A pollished spot in front of the belt after sizing, or after trying to chamber?
Im goin out on a limb and gonna guess it appeared after trying to chamber. In wich case Id try a small base die if the one you have wont adjust down any further. I know RCBS makes one for loading for Auto's.
Good luck
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  #3  
Old 07-30-2010, 02:40 PM
KRP KRP is offline
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Re: Help getting sized 1x fired brass to fit in chamber

You can buy a collet die that sizes right above the belt also.

Innovative Technologies - Reloading Equipment
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  #4  
Old 07-30-2010, 03:48 PM
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Re: Help getting sized 1x fired brass to fit in chamber

I had a similar thing happen with both of my rifles chambered in 257 Wby. I have one that is a Vanguard and one that is a Remington. Then I had the same thing again in a Rem 30-06. I was frustrated as hell!!!! I tried sizing once fired brass(fired in differnt guns) with RCBS dies and it still would not chamber in any of the guns. That led me to believe it was a die issue not a rifle issue. I was full-length sizing as far as I could get the case into the die but I still had a feeling that the case wasnt being sized across the full length. That was confirmed when I checked with my headspace gauge to see how far back the shoulder was getting bumped. It wasnt moving at all. Now when I say headspace I mean from the base to the shoulder not from the base to the belt as headspace is refered on belted magnums.

What I recomend:
Call RCBS and tell them about it and see if they can fix or give you new dies.
or
Try some different full-length dies

What I did:
I took an ever so slight amout of material off the top of my shell holder to allow the case to go just a bit further into the die. Now skeptics, I wasnt out with the ol die grinder blasting away on it, I mesaured the thickness of the shell holder and then took some fine grit sandpaper and would remove a .001 at a time. I set the sandpaper on top of a piece of glass and then would carefully polish some material off. I wanted to keep the removal of material even so the shell holder would make full contact with the die and not be cock-eyed. Then I would re-size the case and then measue to see if the shoulder was getting pushed at all. I kept repeating the process(it took forever but I didnt want to rush it) untill I got the sholder to move back about .002. Low and behold every case started to chamber with no problems. All told I took about .005 off the top of the shell holder before the dies were actually doing a full-length size on the cases.

After I figured out that my RCBS die/shellholder combo didnt work so I got some new LEE dies that worked fine for full length sizing and havent had any issues with chambering.

Now I dont recomend screwing with your dies/shellholder to much and you need to be way carefull that you dont push the shoulder back to far. Its alot of work to make sure its right and I did it more of as a test. The process worked for me but I think that if you just get some different dies(non-RCBS) you may get the same result. The whole thing really jaded me on RCBS stuff(that and some other poor RCBS equipment) and I dont use their dies anymore. I know lots of folks really love RCBS stuff but my experience is showing me that the RCBS of 20yrs ago isnt the same quality of what you can buy now.

Keep us posted on how things are going.
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  #5  
Old 07-30-2010, 04:30 PM
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Re: Help getting sized 1x fired brass to fit in chamber

Yep had the same issue. I now use Redding Full length dies.
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  #6  
Old 07-30-2010, 06:51 PM
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Re: Help getting sized 1x fired brass to fit in chamber

I had this exact same issue with a 264Winmag and brass that I had fired in another 264 I had owned previously. I screwed the sizer die down to where the die was starting to bump the belt and they would chamber but not easily, so I bought all new brass and all was well.
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  #7  
Old 07-30-2010, 07:28 PM
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Re: Help getting sized 1x fired brass to fit in chamber

Quote:
Originally Posted by winmag View Post
A pollished spot in front of the belt after sizing, or after trying to chamber?
Im goin out on a limb and gonna guess it appeared after trying to chamber. In wich case Id try a small base die if the one you have wont adjust down any further. I know RCBS makes one for loading for Auto's.
Good luck

It is after trying to chamber. They chamber after full length sizing but very hard. There is no chance of them chambering before I size, it's just that the die isn't making them small enough.

It just sucks getting rid of this much brass.
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