4 or 5 groove barrels?

[jp]

Guys, What is the advantage of a 5R over a 4 groove in 7mm calibers and .308 calibers?


thanks

 

[Bob Sebold]

Pretty sure it would all be ones own mind. I know of plenty of records set with 4 groove. Can't say that about 5 groove, However, if you think a 5 groove will set the world on fire that's the way to go. Most of this game is in the shooters mind. A buddy of mine keeps telling me 8.7 twist is the magic answer. Not 8.5 and not 9. Trouble is, I keep beating him with a 9 so I switched to an 8.5 and wooped him. I would bet you I could really kick his ass with a 8.7! To answer your question, only matters in theory and on paper in the classroom. On target, it won't make a difference.

 

[fe1]

Guys, What is the advantage of a 5R over a 4 groove in 7mm calibers and .308 calibers?


thanks

5R is supposed to be easier to clean.

 

[jscandale]

Guys, What is the advantage of a 5R over a 4 groove in 7mm calibers and .308 calibers?


thanks

5R is supposed to be easier to clean.

How?

JS

 

[Steve Blair]

5R is supposed to be easier to clean.

[br]I've heard that, too. I have several Bartlein 5R barrels and don't think they clean easier than a Krieger or Brux four groove. Because they have more slope to the land sides, carbon is said to accumulate there less. Contrary to that theory, I don't see carbon accumulate there. What accumulates is on the top of the land and center of the groove, where the bullet forces it against the metal. Everywhere else, it comes off easily. [br]
As Bob said, if you like the idea of a 5R barrel, you won't go wrong with either a Krieger or Bartlein 5R. I'll stick with four groove Brux and Krieger barrels. They've done Ok for me.

 

[A j shooter]

I have a four groove & love it . Can't go wrong with a four but the five grove will shoot as good . As for cleaning the four grove cleans so easy unbelievable. It will flat out shoot 308 Kreiger. 😜😜 .

 

[jp]

Pretty sure it would all be ones own mind. I know of plenty of records set with 4 groove. Can't say that about 5 groove, However, if you think a 5 groove will set the world on fire that's the way to go. Most of this game is in the shooters mind. A buddy of mine keeps telling me 8.7 twist is the magic answer. Not 8.5 and not 9. Trouble is, I keep beating him with a 9 so I switched to an 8.5 and wooped him. I would bet you I could really kick his *** with a 8.7! To answer your question, only matters in theory and on paper in the classroom. On target, it won't make a difference.

I was thinking, that a 4 groove may give a little more speed and lessen the pressure, by means of loading with less powder to obtain same speed. I know dumb idea...That's why I asked. To get someone a little smarter than me to help me with this..

thanks

 

[jonbearman]

Take alook at obermeyer barrels web site and he has some imfo on the differences between conventional rifling and canted rifling.I have a shilen 5r in 6mm br and it quit coppering after 3 rounds. I have 4 groove barrels that copper up after awhile and cant see any difference in accuracy so much but my shilen is a shooter right from the git go.

 

[jp]

thanks Jon, I will check it out. still want to hear from shooters. On their findings.

thanks

 

[Keith Glasscock]

I have a 5R Krieger that is a real pain to clean. Takes hours.

That said, dang it shoots good!

I have a 5c Broughton that I'm going to use for a 284. The 6 Dasher will be on a conventional 3 groove.

In the end, good custom barrels tend to shoot good regardless of groove configuration.

Keith

 

[coford]

My 284 has a Bartlein 5R that is the easiest cleaning barrel I have ever owned. I had always used 4 groove Kreiger's before and they were easy to clean but nothing like this Bartlein. This barrel just doesn't seem to foul. The 5R shoots as good as any 4 groove I have ever owned but I have only owned one 5R - maybe I got lucky.

 

[cmillard]

personally, I have switched to R type rifling be it 5R or 3C. the 3 grooves I shoot are benchmark and my 5R is Krieger, all barrels have shown ZERO copper fouling and clean up easy. by the way, I still have conventional barrels as well--4 and 6 groove

 

[1shot]

+1 to what cmillard said. I have Brux barrels in 4 groove cut rifling and Broughton button rifled, as well as several 5 groove "Boots" barrels and a canted land Kriegers and Bartliens. Each one has certain features unto themselves. Some shot lights out right out of the gate, some took 200+ rounds before they showed their true potential. Some copper fouled at first, then became as smooth as cleaning your daddies shotgun, others coppered badly at first. The common factor is they all shoot far better than the owner.
I hope this helps,
Lloyd

 

[ScottMcc]

I did some reading on 5R rifling not too long ago. The Theory on why they might shoot better, is that an odd number of lands will distort the bullet less. With an even number, the lands are directly across the bullet from each other, so the core is being 'pinched' and disrupted twice as much by the opposing lands. With an odd number, there isn't a land directly opposite, and so supposedly less disruption or swaging of the core.

 

[Sighter]

Love my 5R Bartleins in my 6mm long range guns, never coppered and great performance. To each their own. I think a lot depends on availability!

 

[jp]

It is good to hear all the comments. It seems every one is in favor of the 5R. Bartlien,Krieger,and Brux and Boots all seem to have barrels that are shooters. So now who's? I have too many choices. aaahhh shoot..

 

[cmillard]

well, what I like to do is try a new maker each time, unless the new maker I am trying doesn't offer what I want. that way I can say I have tried brand x. I am not really partial to any one brand, although benchmark is doing some pretty innovative stuff--I will have a second barrel coming from them, since finding .408 barrels is kind of tough, and they make one and have good turnaround times. I have had good luck with criterion, douglas, Krieger, hart, benchmark, badger, and even a green mountain on a 10/22. Schneider, mike rock, brux, obermeyer, pac nor, bartlein, broughton, etc all make great barrels--to name a few. one person I am really impressed with, mostly because he is one hell of a nice guy, is Gary Schneider--his reputation says it all by who shoots his barrels--david tubb and the USMC on their M40-a series rifles. give him a call, you could find yourself talking to him for a while.