Recountouring / fluting a barrel : Stainless vs CMV/Chrome Moly

[akula88]

Can a STAINLESS barrel be aggressively recountoured into government profile?

I have a Stainless SPR-type profile barrel that I intend to reprofile or flute in order to save weight. I've been reading that this type of jobs might affect the barrel accuracy, although I'm not really a sub-MOA kind of shooter. I just want a acceptable-accuracy of 1-2 MOA at 200 yards.

I've done this before on a C/Moly HBAR and I really loved that barrel.

[carbinero]

I've heard good results from re-profiling at http://www.ar15barrels.com/services.shtml among others. However my limited research on fluting showed that this is not a good idea after a certain point in the barrel making process. Sorry I can't back that up, but you can probably google it.

[AR15barrels]

No problem to contour to an A1 profile on a stainless 5.56 barrel, but I would not go any thinner.
Contouring will reduce MUCH more weight than simply fluting.
I suggest a compromise contour of around 0.650" to 0.700" under the handguards and then leaving the front of the barrel from the gas block seat forward alone.
This will remove a significant amount of weight from your SPR profile barrel.

[akula88]

Thanks, Randall.

[knguye11]

Do you have their contact info?

Thanks

Can a STAINLESS barrel be aggressively recountoured into government profile?

I have a Stainless SPR-type profile barrel that I intend to reprofile or flute in order to save weight. I've been reading that this type of jobs might affect the barrel accuracy, although I'm not really a sub-MOA kind of shooter. I just want a acceptable-accuracy of 1-2 MOA at 200 yards.

I've done this before on a C/Moly HBAR and I really loved that barrel.

[BAC]

Would a decent compromise be recontouring the barrel forward of the gas block and fluting the barrel behind the gas block? The fluting would help maintain rigidity and still remove a bit of weight, and the forward recontouring would shave more weight from the front.


-B

[carbinero]

Go 0.650 under the HG and add this: http://www.jprifles.com/1.4.5_hs.php

[El Pistolero]

How does that heat sink affect accuracy in regards to a free-floated barrel? Seems like hanging a heat sink off a barrel would be detrimental to accuracy but I've never seen that before so I can only speculate.

[carbinero]

I don't have one, so I am speculating...If you were "hanging it off" the barrel and exerting sling/bipod pressure against the end of the barrel, then yeah. But it appears the 2 halves are screwed around the barrel along its length, and you'd carefully choose a FF HG which doesn't touch it, so I don't see any issue. I don't think JP is selling snake oil, however you'd have to decide if it makes sense for you, and if not it looks easy enough to uninstall.

[El Pistolero]

Interesting piece nonetheless. Probably not something I would put on a fighting rifle but on a varmint or competition rig I can see the benefit.