Muzzle brake/Caliber Question

[Danale147]

I'm running a 6.5mm with a hellfire brake cut for 6.5mm also. I'm going to be re barreling to a 6mm pretty quick here.
Question is, can I still run the brake cut for 6.5 without any accuracy issues or diminishment on a 6mm? Has anyone run the same type of setup?

I would like to not just put a perfectly good brake aside and have to buy a whole new one if possible.

Much appreciated

 

[theLBC]

i think besides some additional gas escaping the front, rather than redirected to the sides and rear, it is difficult to predict if it will affect the trajectory.
try it. if nothing else, it will give you something to blame right off the bat if you can't hit shit or shoot decent groups.

 

[Danale147]

i think besides some additional gas escaping the front, rather than redirected to the sides and rear, it is difficult to predict if it will affect the trajectory.
try it. if nothing else, it will give you something to blame right off the bat if you can't hit shit or shoot decent groups.

That's true. Always good to have a good excuse for shitty shooting holstered up and ready to go.

 

[Newbie2020]

The true-ness of the muzzle is essential for accuracy and evenness of gasses escaping behind and beside the projectile. It’s conceivable uneven gas flow in the brake might theoretically affect point of impact. But given the huge drop in pressure behind the bullet after it exits the muzzle I doubt the minute differences in gas flow within the brake between a 6 mm and 6.5 mm projectile will affect precision.

 

[EN2722]

Well the fact is the bullet will have no problem leaving the brake that’s mathematically proven. Will it affect anything? IMHO, there’s more factors that we as humans mess up during shooting than our equipment, so I doubt you’ll see any effect.

If you think it matters, then it provides you an excuse to purchase another brake!

 

[Danale147]

I'd like to avoid spending the money if possible, but not going to sacrifice any performance in the name of being cheap.

It sounds like the effect is negligible, and that's kind of what I was thinking. I guess I'm just going to have to try it out and see what happens.

Thanks for the input guys

 

[jim996]

I would just try it. I use the same brake on my AXMC for .308 and .338 barrels. Works fine on both.

 

[Shifty6BR]

I'm running a 6.5 brake on my 6x47l, no issues to speak of in the accuracy dept. For the most part I see 5/8×24 muzzle brakes sold as 6.5/6mm so they are to include 6mm as well.

 

[biffj]

The difference in bullet diameters is minimal and the gain from having a brake set up just for your bore diameter will be so microscopic that you'd be crazy to fool with it. Have a look at spark photos of the gas exiting the muzzle in a high power rifle and you'll see that even with a much larger bore in the brake your loss in brake efficiency will be small. Its more like flat dark earth vs green or any of the other fads. Running a microtiny clearance is silly and of no worth other than one upping your buddy.

Frank

 

[308pirate]

LOL You're talking about increasing the gap between bullet and brake bore by .25 mm.

Worry about something else.

 

[JBoomhauer]

Copy paste from area 419 Website.

”In order to simplify the choices, we have four caliber selections available for the HELLFIRE brake. The difference in efficiency between using a caliber specific brake bore, and the next size up is so minimal if not non existent that we decided to simplify things in order to lower overall costs to you the consumer. As you can imagine, trying to stock the exact quantities required of six or so different calibers would be impossible.”

I shot a 6mm BRAI with a 6.5 hellfire for a while. Changed to a 6mm with no change in poi or noticeable recoil difference.

 

[Danale147]

I guess that answers it. I'll run it and not sweat it.

Thanks for the info guys