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RCBS vs Redding dies

 
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  #15  
Old 06-03-2011, 07:18 AM
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Re: RCBS vs Redding dies

Quote:
Originally Posted by boomtube View Post
A group of twenty shots is reasonably relivant, but a tiny group of three or four or five shots is more likely a statistical fluke meaning nothing at all. Averaging a series of five shot group sizes also means nothing except in BR competition, only groups that include ALL of our hits has any real world significance!
Reminds me of a chat I had with a ballistics engineer at Lake City Army Ammo Plant in the late 1960's regarding a lot of M118 7.62 Match ammo that had an occasional light powder charge; 4 or 5 rounds out of a box of 20 would shoot 10 to 20 inches low at 600 yards. We talked about their testing process where they shot from 100 to 200 rounds per test group then calculated the mean radius; a very good way to assess accuracy.

He mentioned one of their new hires was learning about this test helping him do QA on a lot of M80 ball ammo. After shooting many dozens of rounds from their machine rested test barrel, they went down range to check the 600-yard target. That many-shot group was about 18 inches and he commented to the new guy: "Look at all those 5-shot clusters that are an inch or less in spread." The new guy replied by saying: "Yes, there's several of them. We should tell everyone how accurate that lot of machine gun ammo is. But it'll be hard to prove it by firing only 5 rounds." The old engineer then said: "You're a good man; you'll do well here at Lake City."
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  #16  
Old 06-03-2011, 11:10 AM
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Location: Mountians of SW NC, near Asheville
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Re: RCBS vs Redding dies

"...you'll do well here at Lake City."


Knowledge - bare facts - is easy. Wisdom - knowing what it all means - is much harder! And I've known a LOT of govie self-proclaimed geniuses!
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  #17  
Old 06-03-2011, 08:24 PM
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Join Date: Jul 2009
Location: Wisconsin
Posts: 70
Re: RCBS vs Redding dies

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Originally Posted by newmexkid View Post
Over the years I stumbled upon the Forester BR dies and have never looked back. I get some very good, (concentrict) reloads.
I have Forster dies for my 223 and 243, but i sure would like to see them expand their offerings to include some of the ackley cartridges.

I really like my co-ax press too.

I have a new 223 ackley that I have gotten the fire forming loads figured out and now I need to get some dies for the ackley cases themselves..
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  #18  
Old 06-04-2011, 10:16 AM
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Join Date: Jun 2010
Location: greenwood, IN
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Re: RCBS vs Redding dies

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Originally Posted by Mild Bill View Post
I have Forster dies for my 223 and 243, but i sure would like to see them expand their offerings to include some of the ackley cartridges.

I really like my co-ax press too.

I have a new 223 ackley that I have gotten the fire forming loads figured out and now I need to get some dies for the ackley cases themselves..
they do the .257 Ackley, plus they custom build a die for you
gary
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