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6.5x284 lapua brass in 6.5x284 win chamber

 
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  #1  
Old 03-01-2012, 10:18 PM
chw chw is offline
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6.5x284 lapua brass in 6.5x284 win chamber

My understanding is that lapua brass is made to be chambered in 6.5x284 norma which meets SAMMI standards and the win is a wildcat. my problem is that i recently had a 6.5x284 reamed for win. i was told i could run into problems because the norma necks are thicker (.004) than win and it may stick and can be hard to eject.

if i run into problems can i re-ream to norma or does it not work that way??
its very confusing because stores like sinclair and midway show no difference in the two when purchasing dies, brass, and such.
also the norma throat is longer which allows for longer COAL. i can live with the shorter COAL the win allows for i just dont want dangerous pressure issues and sticking and can this effect accuracy if this set-up works?
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Old 03-01-2012, 11:48 PM
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Re: 6.5x284 lapua brass in 6.5x284 win chamber

You could get the reamer print or make a chamber cast.

But, it's easy enough to just try it.

Worst case IMHO...

Get a set of the proper FL dies and size the Lapua brass.

If the neck is tight, you can easily neck turn which could be a plus.

-- richard
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Old 03-01-2012, 11:59 PM
chw chw is offline
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Re: 6.5x284 lapua brass in 6.5x284 win chamber

Thanks for the reply. I will for sure try turning the necks if it's tight. Would you turn the inside or outside?
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Old 03-02-2012, 12:29 AM
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Re: 6.5x284 lapua brass in 6.5x284 win chamber

Always turn the outside.

That said, I believe the difference is at the base of the cartridge. One or the other is a little larger diameter. I don't recall which is which. You could stick with the win brass, get a chamber print, cast the chamber, or get a piece of each brass and try them.
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Old 03-02-2012, 01:44 AM
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Re: 6.5x284 lapua brass in 6.5x284 win chamber

Hmmm.... I thought the only difference was the Norma was longer in the throat area and OAL. The Winchester was made for short actions and the Norma was intended to be used in a long action.
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Old 03-02-2012, 02:02 AM
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Re: 6.5x284 lapua brass in 6.5x284 win chamber

Funny stuff. Why would anybody be confused?
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  #7  
Old 03-02-2012, 08:21 AM
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Re: 6.5x284 lapua brass in 6.5x284 win chamber

It is also my understanding that the lapua brass and Norma chamber is approximately 0.001 wider at the web/base, so you might find that chamber a bit tight and need to get a small base body die.

My brother did the converse and used Winchester 6.5x284 brass in a 6.5x284 Norma chamber. two firings and the primers pockets didn't hold a primer (with nominal pressure and velocity loads). He talked to the smith and they told him to step up to the Lapua brass, since it was designed to use in the Norma chamber.

Jeffvn

Last edited by JeffVN; 03-02-2012 at 08:23 AM. Reason: spelling issues
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