Gunsmithing 30 cal brake for 6.5 will it matter?

[Anchor Zero Six]

I think the answer is it matters very little but I would like some validation on this.

Getting an AI in 6.5CM with M18x1.5 threads. This really limits options for brakes specificly sized for6.5/260.

So my question is if there is a noticable difference using a 30 cal brake on the 6.5, my guess is no.

 

[spife7980]

Technically, yes. Practically, no.

I think the prb blog said it was like 3-6% or something negligible. The brake tests are an interesting read though seeming to be aging now days with all the new stuff in the market. The basically observations still hold true though.

Edit: it's actually 1-3% for a 6mm.
http://precisionrifleblog.com/2015/07/07/muzzle-brakes-recoil-results-for-6mm-6-5mm/

 

[Anchor Zero Six]

Thanks thats along the lines of my thoughts as well.

I think this clearance or rather overbore is more critical on optimizing supressors. With elaborate scientific testing it probably would register a difference but my shoulder probably wont notice.

Its a 6.5 not a 416 Rigby so the reason for brake is sheerly to reduce rifle movement not to mitigate discomfort.

 

[delfuego]

No, it will not make a difference.

 

[IanHusaberg]

I purchase the Anarchy outdoors Titanium muzzle break for my Ruger RPR 6.5. It was a 308 diameter. I think the cartridge doesn't kick to begin with and it was a 360 degree radial break. It kicked up a lot of dust. Its about the gases and not the bullet so much. I could be wrong? Just my humble opinion(IMHO).

 

[Threadcutter308]

I think the answer is it matters very little but I would like some validation on this.

Getting an AI in 6.5CM with M18x1.5 threads. This really limits options for brakes specificly sized for6.5/260.

So my question is if there is a noticable difference using a 30 cal brake on the 6.5, my guess is no.

7.62mm - 6.5mm = 1.12mm difference. Converted to decimal = .0441" total difference, or .220" per side. 22 thousandths of an inch ?.......I would feel very confident that you would not notice any difference whatsoever. I run a .308 caliber Omega can on my .308W, 6, 6.5 x 47 Lapua and .223 Rem. I have a .223 end cap that I swap out when the can is on my .223. I run the .30 end cap on the .308W and 6, 6.5 x 47 Lapua. If a 6mm end cap were available, I probably wouldn't bother buying it because I don't think it would make any difference.

If you have a caliper, set it to .220" and take a good look at it. It will give you a good idea of the clearance on each side. You should be just fine.

 

[Anchor Zero Six]

Ugg stupid question award winner. Didnt even think of it in terms of actual measurements just knew 260 was smaller than 30 cal. Recalling manny discussions about 30 cal cans on 223's and concensus was it makes a difference in Db's however slight it may be. Anyway I didnt consider how minute the actual overbore was between 7.62 and 6.5 but in my impaired state was thinking 300 vs 260 is 40 so that must have some impact. But looking at it now as .56mm its pretty obvious.

Kids and lack of sleep are causing neuro malfunctions. Here is where you all get to laugh your asses off...I'm an engineer and was a machinist.

Thanks for the perspective. Although now Im wondering why 6.5 brakes are made at all.

A06

 

[Threadcutter308]

Ugg stupid question award winner. Didnt even think of it in terms of actual measurements just knew 260 was smaller than 30 cal. Recalling manny discussions about 30 cal cans on 223's and concensus was it makes a difference in Db's however slight it may be. Anyway I didnt consider how minute the actual overbore was between 7.62 and 6.5 but in my impaired state was thinking 300 vs 260 is 40 so that must have some impact. But looking at it now as .56mm its pretty obvious.

Kids and lack of sleep are causing neuro malfunctions. Here is where you all get to laugh your asses off...I'm an engineer and was a machinist.

Thanks for the perspective. Although now Im wondering why 6.5 brakes are made at all.

A06

Ahhhh, not laughing at all.......I just turned 60 (good lord.........wasn't really prepared for that......), kids are long gone. Many things that used to be important aren't any longer. Sanity does start to grow back after the kids are gone.

let's say that by using a .30 cal suppressor on a .223 costs me 2db of additional noise. My range requires hearing protection for everyone. Do I care about 2db ? Uhhh, no.

if the idea of using a .30 cal brake really bothers you, buy a .223 brake, send everything to a good smith and have him bore the brake for the 6.5mm round. Problem solved. Would I ? Probably not. I'd have to think about it a little more, but at first blush, I don't think it's worth the bother. Conversely, some people look at the bore in the brake to make sure which caliber rifle they are pulling out of the safe. In that respect, having a "6.5mm" brake might be important to some.

 

[NoLegs24]

Why buy the barrel with that thread pitch though?


Sent from my iPhone using Tapatalk

 

[Anchor Zero Six]

Thats the pitch on the AINA barrels so stuck with it untill I shoot it out and replace.

 

[Idaho CTD]

I have self timed 2 piece brakes in M18x1.5 that I can open to any caliber you want.

 

[parshal]

I've been using a .30 cal. Lane on my 6.5 WSM and 6 Creedmoor. Still danged quiet.

 

[Murica]

You won't notice the difference really