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Savage Model 10 FCP w/5R rifling .308

This is a discussion on Savage Model 10 FCP w/5R rifling .308 within the Bolt Action forums, part of the Gun Forum category; Is there any body out there that knows what 5R rifling really means ? And what is the purpose ? Will it help or hender ...

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Old February 2nd, 2011, 06:27 PM   #1
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Savage Model 10 FCP w/5R rifling .308

Is there any body out there that knows what 5R rifling really means ? And what is the purpose ? Will it help or hender on long range shooting such as 600 to 1000 yds ?
Any help will be greatly appreciated .

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Old February 2nd, 2011, 10:08 PM   #2
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Straight from the inventor himself, Boots Obermeyer: 5R Rifling. FWIW, I have a Mike Rock (Rock Creek) barrel on a Remington M700 in .308; Mike studied under Boots Obermeyer and licensed the 5R process from him. That gun shoots so good that it's almost boring! All the bullets just want to group in the same hole!

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Old February 3rd, 2011, 04:10 AM   #3
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Old February 3rd, 2011, 08:46 AM   #4
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The diagram of the 5R at the Krieger site almost reminds me of HK's proprietary rifling from some years back (polygonal, I think?)

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Old February 3rd, 2011, 08:53 AM   #5
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Direct from the Kreiger site...

The Obermeyer 5-R™ style rifling is simply a different style of rifling...

We have honestly seen no significant differences between the two styles of rifling when comparing our barrels. .....

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Old February 3rd, 2011, 09:35 AM   #6
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Not entirely surprising. I have always used Kreiger barrels with good success. I know lots of folks with Hart or Douglas and they too are good and have great results. The Army M24 uses 5R rifling and the Remington 5R's shoot very well. At the same time the Marines use Schneider's without 5R's and achieve great results. Bottom line is a quality barrel is going to shoot well. There is just so much that you can do as far as design to make it better and they all know what that is.

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Old February 11th, 2011, 03:34 PM   #7
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I've read a lot about the 5r rifling and only two things that I've actually given credibility to. This is all speculation and I don't know if it actually amounts to anything tangible more than the time it takes to type it on an internet forum, but here goes.

The first thing about 5r rifling is that the angle of the groove cuts lends itself to easier cleaning, and possibly less buildup of fouling. The second thing is a theory that the bullets get distorted less because no land or groove is directly across from each other because there are 5 lands and grooves.

That being said, I don't know that it makes a big difference. I bought a Remington 5r and I'm glad I have it, but I can't say with certainty that I wouldn't be just as well off with a 700 PSS or a 700 SPS varmint. The 5r has a 24" barrel whereas the PSS and the SPS varmint have 26" barrels, and I think I prefer the shorter barrel so far. Also, I think the stock on the 5r is shorter than the PSS stock in the for end to look better proportioned to the shorter barrel. Also, the 5r is stainless with a pretty green speckled stock.

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