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Campfire Ranger
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Campfire Ranger
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Thinking about a Benchmark #1 contour 6.5mm SS tube finishing up at 24".
Going to go 8 twist and Benchmark offers cut or buttoned barrels in 5R, 3 groove, and 6 groove.
What would you choose?
The Chosin Few November to December 1950, Korea.
I'm not one of the Chosin Few but no more remarkable group of Americans ever existed.
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Joined: Nov 2011
Posts: 399
Campfire Member
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Campfire Member
Joined: Nov 2011
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I would like to see opinions on your question also. I recently ordered a 3 groove Lilja for my .270 win. build. There was a 6 groove available, but Dan said they were getting away from 6 grooves and going to mostly 3 grooves.
I just don't know enough about the pros/cons of the amount of grooves in barrels.
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
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5R, because I'm liking the factory one on my 700 MilSpec so much. I have to believe a match grade custom one would be the stuff. Real technical, huh? 
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Campfire Ranger
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Campfire Ranger
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Campfire Regular
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Campfire Regular
Joined: May 2008
Posts: 733 |
excuse my ignorance... what does 5R stand for?
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Joined: May 2008
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Campfire Ranger
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Campfire Ranger
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The Chosin Few November to December 1950, Korea.
I'm not one of the Chosin Few but no more remarkable group of Americans ever existed.
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Joined: Oct 2008
Posts: 7,263
Campfire Tracker
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Campfire Tracker
Joined: Oct 2008
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Experience of one but 5R. Seems just right in land groove geometry for best compromise between bullet upset and long barrel life.
5R usually generate good velocities with acceptable pressures and clean more easily too.
If there was a 3R the choice would be tougher.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
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Joined: Aug 2002
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Campfire Outfitter
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Campfire Outfitter
Joined: Aug 2002
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Thinking about a Benchmark #1 contour 6.5mm SS tube finishing up at 24".
Going to go 8 twist and Benchmark offers cut or buttoned barrels in 5R, 3 groove, and 6 groove.
What would you choose? How is it 5R rifling unless it has 5 grooves?? 3 groove maybe, but 6 groove makes no sense.
George Associate Gypsy Order of Sleepless Knights ... That is when I carried you ...
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Joined: May 2008
Posts: 16,540
Campfire Ranger
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Campfire Ranger
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They offer 5R rifling and also offer conventional rifling in three groove and 6 groove.
The Chosin Few November to December 1950, Korea.
I'm not one of the Chosin Few but no more remarkable group of Americans ever existed.
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Joined: Aug 2002
Posts: 11,109
Campfire Outfitter
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Campfire Outfitter
Joined: Aug 2002
Posts: 11,109 |
Understood .... reading comprehension ain't what it used to be. 
George Associate Gypsy Order of Sleepless Knights ... That is when I carried you ...
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Joined: May 2008
Posts: 16,540
Campfire Ranger
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Campfire Ranger
Joined: May 2008
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Chris at Benchmark says they no longer offer cut tubes, just buttoned.
Only 8 weeks out though and a very reasonable $320 +shipping for a SS #1 5R 6.5mm @24".
He also advised that flutes on such a light barrel would be merely scratches and wouldn't be worth the upcharge.
I like that type of honesty.
The Chosin Few November to December 1950, Korea.
I'm not one of the Chosin Few but no more remarkable group of Americans ever existed.
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Joined: Dec 2007
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Campfire Regular
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Campfire Regular
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I've only owned one rifle with less than 6 grooves and it was very accurate and the easiest barrel to clean I've ever seen. It was a tikka 4 groove 270 win
I would definitely go with anything less than 6. I'd like to try a 3 groove. It should help reduce pressure, be easier cleaning, ect...
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Campfire Greenhorn
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Campfire Greenhorn
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