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Centerfire Rifles - Manually Operated Lever action, bolt action or other non gas operated centerfire rifles.

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  #1  
Old 02-24-2018, 8:57 AM
boyguan boyguan is offline
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Default Timing for muzzle brake

I got my 5r used and it has a threaded clamp on brake. I noticed that the recoil always pushes the rifle back to one side which makes it hard to stay on target.

Upon further investigation it seems that the brake ports is off about 5 degrees

Is it suppose to be exactly flat left and right?

I read online that the brake is sometimes off to compensate for bullet spin as well so it might be on purpose
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  #2  
Old 02-24-2018, 10:11 AM
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If you're in so-cal, just take your rifle to Randall.
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  #3  
Old 02-24-2018, 10:16 AM
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5 degrees loose or tight?
You could probably stone it for 5 degrees.
355 degrees, will need a machinist
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  #4  
Old 02-24-2018, 11:24 AM
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You need to post a pic. It's a threaded clamp on?
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  #5  
Old 02-24-2018, 12:12 PM
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Quote:
Originally Posted by baih777 View Post
You need to post a pic. It's a threaded clamp on?
Yes threaded clamp on. I can easily adjust it myself
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Old 02-24-2018, 12:34 PM
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You can play with the timing yourself.
Just wanna make sure it's not a eBay brake.
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  #7  
Old 02-24-2018, 3:19 PM
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Quote:
Originally Posted by boyguan View Post
I got my 5r used and it has a threaded clamp on brake. I noticed that the recoil always pushes the rifle back to one side which makes it hard to stay on target.
I read online that the brake is sometimes off to compensate for bullet spin as well so it might be on purpose
That's the principal behind the AK's slant break that is clocked.
I would try rotating it the opposite direction that it is now.
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  #8  
Old 02-24-2018, 11:21 PM
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Quote:
Originally Posted by boyguan View Post
I got my 5r used and it has a threaded clamp on brake. I noticed that the recoil always pushes the rifle back to one side which makes it hard to stay on target.

Upon further investigation it seems that the brake ports is off about 5 degrees
5 degrees misalignment of the brake is NOT going to cause a rifle to move to one side.
Your position behind the rifle is the problem.



When a rifle jumps to the left after the shot, your body is crooked to the left behind the rifle like the guy in the picture above.
When a rifle jumps to the right after the shot, your body is crooked to the right behind the rifle.
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Old 02-25-2018, 12:01 AM
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Quote:
Originally Posted by ar15barrels View Post
5 degrees misalignment of the brake is NOT going to cause a rifle to move to one side.
Your position behind the rifle is the problem.



When a rifle jumps to the left after the shot, your body is crooked to the left behind the rifle like the guy in the picture above.
When a rifle jumps to the right after the shot, your body is crooked to the right behind the rifle.
I’m from a rest but that does look like me. Do you have a photo of the correct way? I can’t imagine how it wouldn’t be a tad crooked

Is it only supposed to come back if I am aligned correctly

Last edited by boyguan; 02-25-2018 at 12:03 AM..
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Old 02-25-2018, 7:52 AM
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Are you shooting off of a bench with a front rest and rear bag or is this a bi-pod set-up?
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  #11  
Old 02-25-2018, 12:52 PM
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Quote:
Originally Posted by LynnJr View Post
Are you shooting off of a bench with a front rest and rear bag or is this a bi-pod set-up?
Bipod and rear bag

I'll try a front bag next time and see if there is a difference
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  #12  
Old 02-25-2018, 3:24 PM
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Quote:
Originally Posted by boyguan View Post
Iím from a rest but that does look like me. Do you have a photo of the correct way? I canít imagine how it wouldnít be a tad crooked

Is it only supposed to come back if I am aligned correctly
I had Randall set me up behind my rifle. It's different than I was used to . Set up in line behind the rifle. A straight line.
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  #13  
Old 02-26-2018, 8:37 AM
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I've found most benches don't allow you to get straight behind the gun like you should. The way benches are set up your shoulders almost always clocked to 10-4, when you really should be 9-3. You want your spine straight inline with the rifle.

A long but worthy read on the subject.
https://www.primalrights.com/library...iring-position
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  #14  
Old 02-26-2018, 10:34 AM
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NorCalFoucus:

Nice article, but the follow up was not to be found. Thanks for this though !

Link:
https://www.primalrights.com/library...iring-position
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  #15  
Old 02-26-2018, 11:54 AM
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Quote:
Originally Posted by ar15barrels View Post
5 degrees misalignment of the brake is NOT going to cause a rifle to move to one side.
Your position behind the rifle is the problem.

(picture)

When a rifle jumps to the left after the shot, your body is crooked to the left behind the rifle like the guy in the picture above.
When a rifle jumps to the right after the shot, your body is crooked to the right behind the rifle.
Great post, that's something I've honestly never even thought about, I'm going to try this next time I shoot!

I've often wondered why my AR-10 always seems to jump to one side or the other after each shot, even with the rifle configured to have very little recoil. I think this almost certainly explains it. I learned something new today
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Last edited by cockedandglocked; 02-26-2018 at 11:57 AM..
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  #16  
Old 02-26-2018, 7:27 PM
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Quote:
Originally Posted by boyguan View Post
Do you have a photo of the correct way?
Not my picture and it was not taken from straight behind the gun, but this is the closest picture I found while googling:



The rifle should be parallel to the spine.
You obviously can not get your rifle aligned with your spine because your neck and head are in the way, but if you move the rifle over to your shoulder and draw a line through the rifle, that line should run parallel to your spine.
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Old 02-26-2018, 8:16 PM
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Quote:
Originally Posted by ar15barrels View Post
Not my picture and it was not taken from straight behind the gun, but this is the closest picture I found while googling:



The rifle should be parallel to the spine.
You obviously can not get your rifle aligned with your spine because your neck and head are in the way, but if you move the rifle over to your shoulder and draw a line through the rifle, that line should run parallel to your spine.
Thanks for the photo.

I tried looking for some from s bench but could not find any to show correct position.
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  #18  
Old 03-02-2018, 12:44 PM
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This may be the most accurate stance, but, boy, it must rattle your fillings when you shoot a powerful rifle.
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Old 03-02-2018, 8:14 PM
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Quote:
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This may be the most accurate stance, but, boy, it must rattle your fillings when you shoot a powerful rifle.


If thatís happening then your doing a lot of other things wrong.
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Old 03-02-2018, 8:42 PM
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Quote:
Originally Posted by ar15barrels View Post
5 degrees misalignment of the brake is NOT going to cause a rifle to move to one side.
Your position behind the rifle is the problem.



When a rifle jumps to the left after the shot, your body is crooked to the left behind the rifle like the guy in the picture above.
When a rifle jumps to the right after the shot, your body is crooked to the right behind the rifle.
Hey, i think i know that guy. He wears my watch.
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Old 03-03-2018, 7:17 AM
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He is shooting off of a bench with a bipod not off of the ground.
Going to a proper front rest with a sandbag will cure the problem.
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  #22  
Old 03-03-2018, 8:29 AM
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Quote:
Originally Posted by LynnJr View Post
He is shooting off of a bench with a bipod not off of the ground.
Going to a proper front rest with a sandbag will cure the problem.
Iíll try this next time Iím out.
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  #23  
Old 03-03-2018, 2:13 PM
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Here is a picture of the brake. Itís a threaded barrel with a threaded clamp on brake. When itís snug against the barrel itís about 5 degrees too far. So I just backed it out and tightened it down but it is not tight against the barrel.


Do I need a shim so itís tight or since cause itís a clamp on type itís ok?






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Old 03-03-2018, 2:40 PM
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Quote:
Originally Posted by boyguan View Post
Here is a picture of the brake. Itís a threaded barrel with a threaded clamp on brake. When itís snug against the barrel itís about 5 degrees too far. So I just backed it out and tightened it down but it is not tight against the barrel.


Do I need a shim so itís tight or since cause itís a clamp on type itís ok?






Sent from my iPhone using Tapatalk
It would theoretically be better if you put a 0.001" shim behind it, but it probably won't matter if you don't.
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Old 03-03-2018, 3:39 PM
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Originally Posted by NorCalFocus View Post
If thatís happening then your doing a lot of other things wrong.
I watched a guy shoot 2 shots of a Weatherby 460 mag offhand, standing up.
He said the first shot hurt quite a bit. He readjusted his grip and stance and fired again. That was enough. He said that he bought the rifle used with 1 box of ammo, with 3 shot rounds. He then shot 2 more, 5 out of 20, then sold it at the next gun show, with the 15 new rounds.
I think it would be real interesting to see someone shoot it as pictured.
Isn't this one of the reasons current shooters are flocking to 6-6.5mm rounds?
Isn't the current champ shooting a .243?
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