Barrel Harmonics Testing

asd9055 · Mar 25, 2023

M1A1ABRAMS said:
4 sounded .like a lot of fun though

My friend had his M70 375H&H done couple of decades ago and I shot that rifle. Muzzle rise and kick was reduced. When I got mine, I chose a radial muzzle brake custom to the rifle and was able to aslo keep my iron sights. If I choose, I can remove it. Magnaport is final. They used to do them to revolvers and pistols as well. That was the thing back in the day.

VinceMule · Mar 25, 2023

I have two Harrells tuner brakes, both on 6 Dashers, one 4 Groove Krieger, 8T, and the other a 3 groove, 3R, 8T from X caliber.

Harrells tuners work. My next Harrells will be the tactical for a Krieger 308.

asd9055 · Mar 25, 2023

VinceMule said:
I have two Harrells tuner brakes, both on 6 Dashers, one 4 Groove Krieger, 8T, and the other a 3 groove, 3R, 8T from X caliber.

Harrells tuners work. My next Harrells will be the tactical for a Krieger 308.

I am thinking about a tactical for a 300WBY MKV. Got a b/day coming up, maybe the kids will buy it for me. All my other brakes are radial, thinking of trying one on the sides.

M1A1ABRAMS · Mar 25, 2023

asd9055 said:
My friend had his M70 375H&H done couple of decades ago and I shot that rifle. Muzzle rise and kick was reduced. When I got mine, I chose a radial muzzle brake custom to the rifle and was able to aslo keep my iron sights. If I choose, I can remove it. Magnaport is final. They used to do them to revolvers and pistols as well. That was the thing back in the day.

I know what you meant. But it wasn't what you typed. And I did find it quite interesting though being a bachelor. lol

asd9055 · Mar 25, 2023

M1A1ABRAMS said:
I know what you meant. But it wasn't what you typed. And I did find it quite interesting though being a bachelor. lol

Fingers don't always follow the brain, plus English is my second language

M1A1ABRAMS · Mar 25, 2023

asd9055 said:
Fingers don't always follow the brain, plus English is my second language

It's all good. Just being the goofy me.

Rflshootr · Mar 25, 2023

M1A1ABRAMS said:
4 sounded .like a lot of fun though

At my age, that might be considered a dangerous weapon.

Rich Coyle · Mar 25, 2023

I didn't read what others have posted yet. Positively one can use the rubber things to dial in a load just like one can with a barrel tuner. One must start right at the stock and fire two. If they aren't close together move it about 1/8" towards the muzzle. Repeat till you get fantastic results.

Hard Head · Mar 25, 2023

FEENIX said:
Sorry for your troubles. This is one of the reasons I opted for the LR over the MS. Good luck!

Hey FEE NIX,I lived in Billings for 26 years ,loved it did a lot of hunting in the 60's -80's GOD I MISS IT!! Pete

asd9055 said:
It is a system, however, weight seems to be able to "adjust" harmonics (origial BOSS idea). this explains it a little better than I can

Barrel Harmonics Mode Shape Movies

www.varmintal.com

You want the bullet to exit when the muzzle is at a certain position. Chris Long wrote about it long ago.
You can Adjust the load, or weight on barrel, or a combination.

Capt RB · Mar 25, 2023

I've been using the self timing beast brakes for a while now. Although they are not as fine as the EC or others. I have tuned 2 of the 3 rifles I have them on. The 300 win I am load developing will see after I find seating next range trip. Basically time it shoot back out 1 rev re-tighten shoot for 5 revs. You will see a sweet spot. 2 are in a chassis and 1 is a fiberglass stock. The 2 done showed distinctly what it wanted. Any self timing brake can tune to some extent.

Mike Matteson · Mar 26, 2023

Mikecr said:
My only experience with a tuner was with a Browning BOSS. It worked really good.
I did seating while fire forming. Found a forgiving powder charge, per my chronograph. Dialed in tightest grouping with the tuner.
Went to cold bore accuracy tuning with powder tweaking. Pretty much done right there.

I did not like a break though. Ended up swapping to the non-break BOSS tuner, and dialing it back in. That was easy.
Probably killed ~300 groundhogs with it, and then destroyed it..
Blew off the tuner, split barrel, expanded action ring, by leaving laser pointer in muzzle (for setting up chrono screens) and firing a shot!
In my top 10 dumbest moves for sure.
View attachment 450306
The thing about the BOSS system is that is really is a system (not just a threaded break).
It's weight may have been was set per barrel profile & cartridge/timing. They use a special hard rubber bedding with it.
They seem to know their stuff. https://patents.justia.com/patent/5279200
Their system likely focuses on dialing in factory ammo (arguably the biggest potential for tuners).

I have read about leaving laser pointer in the muzzle. I don't have one and now I don't think I'll get one either.

asd9055 · Mar 26, 2023

Mike Matteson said:
I have read about leaving laser pointer in the muzzle. I don't have one and now I don't think I'll get one either.

If you get one, get the one that goes in the chamber. No accidents that way

Mikecr · Mar 27, 2023

I installed a cable from muzzle laser pointer to a dummy round (a rod) which I now chamber with use of the pointer.
I don't want to have to purchase a chamber laser for every cartridge. The muzzle laser is universal.

asd9055 · Mar 27, 2023

more than one ways to skin the cat
The AimShot came with bushing to pretty much cover most of the calibers I own, but I understand having to buy more bushing.

Barrel Harmonics Testing

asd9055

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VinceMule

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asd9055

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M1A1ABRAMS

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asd9055

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M1A1ABRAMS

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Rflshootr

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Rich Coyle

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Hard Head

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Barrel Harmonics Mode Shape Movies

Capt RB

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Mike Matteson

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asd9055

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Mikecr

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asd9055

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