Recommend a Brake--Seekins Havak

Maybe because they get paid or get them free and there's not enough difference for them to go up to the next level.
That's speculation. Very few get $ sponsored, some get accessories and guns as promos, many get 10% off. I would think MBM get its own brakes at a good price for its own promotion, and they won't change :)
 
Kelbly's has a nice looking brake that is made to be machined to match your barrel contour. It's side vent and a timed brake. Not sure how much recoil reduction you get, I'm going to install it on a 270 WSM I'm in the process of building. But looking at the quality of their products I'm sure it will do a great job.
 
That's speculation. Very few get $ sponsored, some get accessories and guns as promos, many get 10% off. I would think MBM get its own brakes at a good price for its own promotion, and they won't change :)

It appears we are both speculating. I will go with the video. I used to do brake testing and had no bias. The results were what they were. Here is an example of one test.

12/6/14 60*
Brake with four angled slots at about 15 1/2 degree threaded on both ends

Today I used the Weatherby Mark V ultralight six lug action without the scope. It has a Pac-Nor 26" barrel. The rifle weighs 5 lb 10oz. The load consisted of .270 Winchester cases necked down and blown out leaving about 3/16" neck. H4831 from WW2 @ 65.0 grains was ignited by a Federal 215 Magnum primer. The average velocity for the eighty-five grain G.S.Custom bullets was slightly over 3,800 feet per second. I fired three shots with each setup to verify the free recoil travel information generated.

Without a brake:

14 7/8"

14 5/16"

14 5/16"

Average - 14 ½"

With the brake installed so the ports angled toward the front:

4 5/8"

4 7/8"

4 7/8"

Average - 4 13/16"

reduction – 66.8%



With the brake installed so the ports angled toward the rear:

3"

3 ¼"

3 5/16"

Average - 3 3/16"

Reduction – 78%

Reduction - 51% better than angled forward


I have no idea how these numbers would compare to a free hanging rifle with a way to record its travel. But at least we can see a pattern developing.
 
It appears we are both speculating. I will go with the video. I used to do brake testing and had no bias. The results were what they were. Here is an example of one test.

12/6/14 60*
Brake with four angled slots at about 15 1/2 degree threaded on both ends

Today I used the Weatherby Mark V ultralight six lug action without the scope. It has a Pac-Nor 26" barrel. The rifle weighs 5 lb 10oz. The load consisted of .270 Winchester cases necked down and blown out leaving about 3/16" neck. H4831 from WW2 @ 65.0 grains was ignited by a Federal 215 Magnum primer. The average velocity for the eighty-five grain G.S.Custom bullets was slightly over 3,800 feet per second. I fired three shots with each setup to verify the free recoil travel information generated.

Without a brake:

14 7/8"

14 5/16"

14 5/16"

Average - 14 ½"

With the brake installed so the ports angled toward the front:

4 5/8"

4 7/8"

4 7/8"

Average - 4 13/16"

reduction – 66.8%



With the brake installed so the ports angled toward the rear:

3"

3 ¼"

3 5/16"

Average - 3 3/16"

Reduction – 78%

Reduction - 51% better than angled forward


I have no idea how these numbers would compare to a free hanging rifle with a way to record its travel. But at least we can see a pattern developing.
That is impressive work, thank you
 
Precision Rifle Blog did an incredibly comprehensive scientific test of the leading Brakes. The results were surprising in some cases. I bought the APA Little Bastard based on this study and have been very happy.
On a CF rifle I'd only have 1 of 2 brakes on them until I came across the Beast brakes in titanium. Either the little Bastard or a tunable BOSS brake like Browning & Winchester use to make that enabled me to shoot every bullet weight I wanted to use from the lightest to the heaviest in my Rem 7mm Mag & 300 Win Mag both were Browning A-Bolt ll's and I could shoot them all day long if I wanted to. It was awesome to have 2 off the rack mag LR rifles that could do all that & were tac drivers I could burn 3-4 boxes of ammo up in a session & still carry the gun back to my truck in the same hand too. The only drawback for me with the brakes on my " Hunting Rifles " was forgetting to bring earplugs of forget/not have time to put them in & shoot. It's a painful mistake I've made more than once.
 
Put a (Break) on a new HMR-PRO in 300 WM. Recoil is like a 243/6MM. Built by Mark Mueller of Port LaVaca TX. Matches up very nicely with the factory threads and looks. Rey nice.

@ upsidedownjack, I like the looks of that brake. Did he do the barrel threading and manufacture the brake? Do you have contact info for him? Google comes up empty.
 
It appears we are both speculating. I will go with the video. I used to do brake testing and had no bias. The results were what they were. Here is an example of one test.

12/6/14 60*
Brake with four angled slots at about 15 1/2 degree threaded on both ends

Today I used the Weatherby Mark V ultralight six lug action without the scope. It has a Pac-Nor 26" barrel. The rifle weighs 5 lb 10oz. The load consisted of .270 Winchester cases necked down and blown out leaving about 3/16" neck. H4831 from WW2 @ 65.0 grains was ignited by a Federal 215 Magnum primer. The average velocity for the eighty-five grain G.S.Custom bullets was slightly over 3,800 feet per second. I fired three shots with each setup to verify the free recoil travel information generated.

Without a brake:

14 7/8"

14 5/16"

14 5/16"

Average - 14 ½"

With the brake installed so the ports angled toward the front:

4 5/8"

4 7/8"

4 7/8"

Average - 4 13/16"

reduction – 66.8%



With the brake installed so the ports angled toward the rear:

3"

3 ¼"

3 5/16"

Average - 3 3/16"

Reduction – 78%

Reduction - 51% better than angled forward


I have no idea how these numbers would compare to a free hanging rifle with a way to record its travel. But at least we can see a pattern developing.
I have not checked your numbers, but how do you figure 51% better than angled forward for the numbers you posted (66.8% vs 78%)
 
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