Muzzle Brakes and harmonics

[BCBRAD]

Just as point of interest, I asked a friend watch as my braked 300 WM was fired. It is a threaded with pinch bolt TRG. We kept moving the brake , 'radially' after each shot to limit muzzle torque. Eventually there was no preceptable muzzle torque . This made the brake way off from the horizontal.

Anyway we indexed it for no muzzle torque. Rifle will shoot <5"-5 shot groups at 1000 when the shooter is up to it.

This may account for a lot of POI shift. I have seen no accuracy difference with the brake on or off......if anything it is easier to get good groups with out the torque and recoil.

 

[skidderman]

Used to shoot a browning 300wsm Abolt with factory boss/brake system. With & without the brake poi changed by 2 inches high. Had to get rid of it as shooting it was hideously loud.

 

[no-one special]

Seems like a strange statement coming from a company that promotes making muzzle brakes - doesn't instill much confidence...

You too huh? gst, do you have any engineering plans for your brakes or just willy nilly milling?
Some companies have spent significant money or had help from professional sources with air management engineering to manufacture some very efficient brakes. No offense but to essentially post on forum with a thread like this seems very odd for a supposed professional

 

[burnaby]

Actually it is refreshing to see folks honest with their opinions and not be a realtor selling properties.
Brakes have their pros and cons. (ie. See the hits vs concussion/noise)

Seems like a strange statement coming from a company that promotes making muzzle brakes - doesn't instill much confidence...

 

[guntech]

I have seen significant changes in POI with the installation of a brake but have never seen anything like 9 inches. I have seen four inches.

Never got into the big and ugly 'tactical' styles... but I have made and installed a lot of radial brakes and symmetrical side port brakes... Seldom is the POI more than a couple of inches... never have I seen a big change like 9 inches.

 

[EHG]

Sorry if this has ben covered, but what or how did you check to make sure it was concentric with the bore...

In layman terms,
Barrel is setup in a lathe and indicated by the bore, then the barrel is threaded while in the lathe making it concentric to the bore.

 

[gstprecision]

You too huh? gst, do you have any engineering plans for your brakes or just willy nilly milling?
Some companies have spent significant money or had help from professional sources with air management engineering to manufacture some very efficient brakes. No offense but to essentially post on forum with a thread like this seems very odd for a supposed professional

I don't have any problem with the brake, it performs as it is supposed to. Recoil reduction is great and there is practically no muzzle lift. I have a Point of impact change that is out of the norm, and I am asking if anybody here have any solution/experience or can point the obvious that I may have missed.

I am still doing lots of verification and testing. I had a tight fitting pin in the barrel through the brake and the clearance is equal all around the brake. The action is currently mounted in a flimsy Tupperware stock and it is fairly close to the barrel, it might be hitting and causing major shift. I could also be dealing with many other small issues that I am still investigating.

I am not saying my product is better or worse than any other, all the feedbacks I received from clients that bought them are positive and they have not experienced major POI change like I do, everybody is extremely satisfied.

As a professional I am admitting having a problem with one of my rifle, It could be anything, barrel, action, bullet, reload, stock or even the brake, at this point I don't know. It is a complete new built that I have just finished. I am hoping this thread, if I find a solution to my problem, could be of great help to someone experiencing the same thing in the future.

 

[cody c]

In layman terms,
Barrel is setup in a lathe and indicated by the bore, then the barrel is threaded while in the lathe making it concentric to the bore.

Thanks, I understand the process, was trying to politely ask the OP if he had done it all correctly without being offensive.

GSTprecision, you mention a flimsy Tupperware stock, with the extra weight of the brake, have you checked for stock clearance with the brake on it and sitting in a bipod, could that have changed?

 

[guntech]

Thanks, I understand the process, was trying to politely ask the OP if he had done it all correctly without being offensive.

The op stated in his first paragraph, "So I threaded the muzzle end and installed a brake then single point bored it to 0.020" over caliber nominal."

 

[gstprecision]

Exactly Guntech, everything is in alignment as it was done on the lathe.

I am doing some testing and when the rifle is on a bipod the flimsy stock is extremely close to the barrel, and it does not take much to make them touch. I am pretty sure that during firing they are touching.

Adding extra weight and length definately change the harmonics and if the barrel contact the stock it would change the POI as the barrel flex and vibrate differently.

I will wait for the new stock before doing any more test.

GST