bluejay75
Well-Known Member
What did you have to do to make it work? Bolt and all that stayed the same?
Thoughts on preferred barrel blanks barrels with 5 r rifling
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bowhunter1287
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Ya I hope so this is my first custom build and I'm trying to do it all myself
Since the 700 has short COAL capacity the only way I could address the desire to load as close to the lands was to shorten the throat so the bullet jump is reduced. It does hamper your reloading when the rifle has short COAL capacity. The throat is still within SAAMI but on the short side of the range.
bluejay75
Well-Known Member
@Muddyboots excuse my ignorance in the matter but can factory ammo still chamber?
As long as still SAAMI, yes. Factory is loaded to SAAMI. There may be a bullet that has an ogive that is problem but not likely in factory.
milo-2
Well-Known Member
I was under the assumption "R" meant radiused rifling, same, w/o the sharpness of the edges of the rifling.
Could one tell the difference between a 5R barrel, and a reg cut barrel with 300 rds down it?
General definition:
5R is a 5-groove rifling pattern with sloped or angled sides to the lands. All rifling has a certain amount of angle to the sides of the lands as a natural effect of the rifling process. The sides of the grooves are parallel, but the sides of the lands are not and the 5R carries this to an extreme.
So why should this be good? It is felt the 5R may seal off the bullet better. Also, the angle of the lands may be less stressful to the bullet jacket, so thin-jacketed match bullets would be less likely to come apart at the high spin rates longer bullets require. It is also felt to be easier to clean as there are no tight corners next to the lands to hold powder fouling.
The 5-groove type of rifling comes from the belief an odd number of grooves is also less stressful to the bullet because it doesn't have two lands directly across from one another.
5R is a 5-groove rifling pattern with sloped or angled sides to the lands. All rifling has a certain amount of angle to the sides of the lands as a natural effect of the rifling process. The sides of the grooves are parallel, but the sides of the lands are not and the 5R carries this to an extreme.
So why should this be good? It is felt the 5R may seal off the bullet better. Also, the angle of the lands may be less stressful to the bullet jacket, so thin-jacketed match bullets would be less likely to come apart at the high spin rates longer bullets require. It is also felt to be easier to clean as there are no tight corners next to the lands to hold powder fouling.
The 5-groove type of rifling comes from the belief an odd number of grooves is also less stressful to the bullet because it doesn't have two lands directly across from one another.
Regular cut barrel is 6 groove so what you would need to do is have a 5R barrel of exact same dimensions to compare identical load performance. I just like knowing my bullet is not being compressed immediately opposite forces.
milo-2
Well-Known Member
Interesting, I have only shot 1 5R barrel, nothing stood out IMO, other than I do not recall a break in. Barrel did not speed up up, ever, but the same occurred with a 3 groove Mullerworks 6.5 barrel.
I don't think I have ever owned a 6 groove barrel either, most have been 4 groove. All cut.
bowhunter1287
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How many shots does it normally take to break in a 5r?
Depends on how well the barrel was lapped and the throat was cut and finished by the smith.
I seriously doudt majority of shooters would know if a barrel was a 3, 4, 5 or 6 groove barrel in the way it shot or broke in if you didn't tell them or they looked.
The quality of the steel, machining and finish is 99% of how good the barrel is cut or button.
The quality of the steel, machining and finish is 99% of how good the barrel is cut or button.
David Urasky
Well-Known Member
People tend to look at 5R profiles as being superior rifling. The benefit to using a 5R profile is easier cleaning. With the tapered edges of the rifling crap doesn't get stuck in a sharp corner as on a traditional squared edge rifling. As far as performance is concerned, there's no real benefit. I use them for my competition rifle where I'm shooting a couple of thousand rounds a year. My hunting guns getting maybe 50 rounds per year have traditional rifling unless I happen to have a 5R on the shelf.
Talk to the barrel manufacturer. Shuch as for my 20Tactical, Bartlien recomended a 4 groove traditional rifiling barrel. But I don't even know if 5R is available in 20 caliber.
Talk to the barrel manufacturer. Shuch as for my 20Tactical, Bartlien recomended a 4 groove traditional rifiling barrel. But I don't even know if 5R is available in 20 caliber.
Excellent and mine shoots in the same hole. Very fair price also and quality work.
