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Neck expanding

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Re: Neck expanding
« Reply #15 on: January 03, 2016, 07:37:37 PM »
 

Raptor

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Your correct!! The other thing I didn't like about the BR size cases was the feeding issue. I didn't have a detachable mag set up and tried to modify my stock BDL with an "Extender" which worked with mixed results. You also had to modify the stock magazine set up for the short cases. I just didn't have that good of luck with it. I built the BRX instead of the dasher because I figured the 30 degree shoulder would feed better.

If your shooting matches to around a 1000 the 6MMs are really hard to beat. They are the total package in my opinion esp with the new Hyb. bullets. Since I got my SLR back I am sure I will be using it if I shoot any matches again this year. My smith puts on a match every year for his customers and at his we shoot out to a mile. So I always use my trusty 284 for his match. Where do you live?? Good luck with your project!!!!!
 

Re: Neck expanding
« Reply #16 on: January 03, 2016, 07:58:10 PM »
 

Jeff M

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I'm in WI.

There are a few guys on here that are feeding dashers from ai mags.  Alpine, offgrid, and possibly others as well.  Since neither of the rifles are built yet, I'm not sure exactly how much tweaking will need to be done.  The dasher for sure will be fed from aics mags, the brx I'm not sure yet.
Every time you make a typo, the errorists win.
 

Re: Neck expanding
« Reply #17 on: January 15, 2016, 05:48:30 AM »
 

jlemmy

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  Read up a bit on the aforementioned donut issue and its reason for showing up. Since I'm set on necking up the Lapua brass I figured I'd at least need a plan. Ordered up a Wilson case trimmer and 7mm reamer. After firing it it starts to show up I'll pass the reamer thru the neck before sizing. Hope this keeps it in check as I'm hoping for good brass life. I already own a brass destruction device, no need for another.
 

Re: Neck expanding
« Reply #18 on: January 15, 2016, 12:04:18 PM »
 

29aholic

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Are these calibers you cant just fire form up? When I was playing with the TCU calibers which were all based off a 223 case I would just fire 223 in them to form the brass, then full length size the first time and trim.
 

Re: Neck expanding
« Reply #19 on: January 15, 2016, 12:14:41 PM »
 

jlemmy

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Correct, going from 6.5mm to 7mm. Fire forming is out and the necks have been mandrel expanded. I've been tipped off to and read about the donut issue. Shoulder brass moving into the neck area after firing.