Witt Machine Clamp on Brake

Dean2

Well-Known Member
Joined
Jul 31, 2010
Messages
977
Location
Alberta
I like clamp on brakes. They work very well. Here is a review I did of the Kahntrol version. Do NOT severly over torque the screws, most a rated in inch pounds. First time I installed it I went over torque recommendation of 30 inch pounds, went to 50. Now I just do the 30 recommended, no problems with it loosening and no Loctite of any kind used..

Review

After looking at a number of Clamp on brakes I decided to order the Kahntrol brake. Even with exchange and postage it was cheaper than buying the Canadian equivalent. It was however quite a bit more money than the Witt Machine brake.

Kantrol KSMB645 for muzzle diameter of .640-.675 $149.95 U.S.
Witt Machine Exact fit to the barrel measurement $89.00 U.S.
Grizzly Exact fit to barrel measurement $235.00 Canadain

One of the big reasons I chose the Kahntrol was it was the only one that was able to fit on a fairly wide range of barrel sizes, in this case from .640 - .675. It means I can use it on more than one gun. All of the other brakes were cut for the exact muzzle diameter of the specific gun barrel, accurate to .003. This makes fitting them to any other guns unlikely.

mb-kahntrol1.jpg


Kahntrol accommodates the wider range of barrel sizes by having 6 vertical tightening screws along a horizontal split. Very similar to a set of scope rings but over a much longer opening.

The brake was very easy to mount on my Left Hand 26” all Stainless Remington 700 in 7 RUM. I followed the on-line instructions and had the brake mounted, levelled and timed in about 20 minutes. I could have done it faster but I was quadruple checking everything and being very careful to ensure everything lined up perfectly so there would be no chance of baffle strikes when fired. The one thing I did different than the instructions was torque it down to 50 inch pounds rather than the 30 recommended.

This 7 RUM is my all time least favorite rifle to shoot out of the box. It didn't really recoil in the traditional sense, it was more appropriately described as a REALLY SHARP punch that even with lots of padding would give you a headache after 10 or 15 rounds. Not really surprising when you figure you are burning 95 grains of powder behind a 162 grain bullet in a gun the weighs 8.5 lbs with scope. It was far more unpleasant to shoot than my 375 or even my 460. (To be fair both of those are quite are bit heavier and the 460 has a brake on it). In fact I have never shot any other gun that was as nasty to shoot or kicked as sharply as this 7 RUM out of the box.

After installing a Mercury suppressor in the stock and a Pachmeyer decelerator pad it was comfortable to shoot but still had a very brisk recoil and quite a bit of muzzle jump. I figured this made it the perfect candidate to try the Kahntrol Brake on.

In addition to the brake, I had also mounted a new Leupold 4.5x14 B&C reticle scope for an upcoming antelope trip so the gun needed to be sighted in as well. With everything mounted and two loads that I know shot well in the RUM, 162 BTSP with 84 grains of 7828 SSC in Rem brass with Winchester mag primers at 3.60 LOA, and the same with 94.5 Grains of Retumbo, I headed to the range. (Both of these loads are pushing the 162 grain Hornady bullet north of 3300 fps) It took two shots to get the gun hitting 3” high, dead on the line at 100 yards.

With the bake on there was no difference in group size or shape at 100 or 300 yards. Both loads shot just as good as before, making 3 shot clover leafs at 100 and under 1” at 300. There was however a VERY noticeable reduction in recoil and muzzle jump. The gun felt like something between a 223 and a 243. I checked the brake after the first shot and every two or three thereafter and there was no indication of baffle strikes, as it should be. There was however carbon buildup on the barrel and brake as the number of shots increased. I checked the bolts after 20 rounds and found no decrease in torque.

I was wearing muffs and plugs, as I always do at the range and I did not notice any increase in perceived noise from the brake. I was alone so I did not have anyone to validate whether it was louder to the sides but I would be willing to bet that like all brakes it is. Also, with the amount of recoil reduction it must be pushing a pile of gas to the sides so anyone shooting beside you will definitely feel the blast, though from previous experience this gun makes a hell of a muzzle blast off to the sides even without a brake.

After 30 rounds of very slow fire I felt no soreness in my shoulder nor any other ill effects of shooting, and all I was wearing was a T shirt. I then removed the brake and fired a two shoot group. It hit exactly 1.5” left but on precisely the same elevation, exactly 3” high, as when the brake was on. I adjusted the scope and fired a three shoot clover leaf group that is exactly 3” high, dead on the line at 100 yards. There was a very noticeable increase in recoil without the brake and no perceivable reduction or difference in muzzle blast or noise.

The brake is very well made and fits to the gun well. I would never use a brake on a hunting rifle but this is a great tool for working up loads on guns that tend to beat you up. I could see absolutely no differences in the groups but this is only one gun. I will be interested to try it on a couple of other rifles to see if the results are the same. If they are I will probably order a couple more to cover other barrel sizes.

It is completely effective in reducing recoil and making heavy or medium hitting guns into pleasant to shoot rifles. For range shooting it is the cats pyjamas and because it is so easy to mount and remove it is perfect for use on guns that are primarily hunting rifles as well. The POI shift is easy to adjust for when you remove the brake.

A number of folks asked me to post this after I got the brake and tried it. I hope the info is useful to others thinking about putting brakes on their rifles.
 

ButterBean

Well-Known Member
LRH Team Member
Joined
Feb 5, 2012
Messages
5,115
Location
West Terre Haute Indiana
I like clamp on brakes. They work very well. Here is a review I did of the Kahntrol version. Do NOT severly over torque the screws, most a rated in inch pounds. First time I installed it I went over torque recommendation of 30 inch pounds, went to 50. Now I just do the 30 recommended, no problems with it loosening and no Loctite of any kind used..

Review

After looking at a number of Clamp on brakes I decided to order the Kahntrol brake. Even with exchange and postage it was cheaper than buying the Canadian equivalent. It was however quite a bit more money than the Witt Machine brake.

Kantrol KSMB645 for muzzle diameter of .640-.675 $149.95 U.S.
Witt Machine Exact fit to the barrel measurement $89.00 U.S.
Grizzly Exact fit to barrel measurement $235.00 Canadain

One of the big reasons I chose the Kahntrol was it was the only one that was able to fit on a fairly wide range of barrel sizes, in this case from .640 - .675. It means I can use it on more than one gun. All of the other brakes were cut for the exact muzzle diameter of the specific gun barrel, accurate to .003. This makes fitting them to any other guns unlikely.

mb-kahntrol1.jpg


Kahntrol accommodates the wider range of barrel sizes by having 6 vertical tightening screws along a horizontal split. Very similar to a set of scope rings but over a much longer opening.

The brake was very easy to mount on my Left Hand 26” all Stainless Remington 700 in 7 RUM. I followed the on-line instructions and had the brake mounted, levelled and timed in about 20 minutes. I could have done it faster but I was quadruple checking everything and being very careful to ensure everything lined up perfectly so there would be no chance of baffle strikes when fired. The one thing I did different than the instructions was torque it down to 50 inch pounds rather than the 30 recommended.

This 7 RUM is my all time least favorite rifle to shoot out of the box. It didn't really recoil in the traditional sense, it was more appropriately described as a REALLY SHARP punch that even with lots of padding would give you a headache after 10 or 15 rounds. Not really surprising when you figure you are burning 95 grains of powder behind a 162 grain bullet in a gun the weighs 8.5 lbs with scope. It was far more unpleasant to shoot than my 375 or even my 460. (To be fair both of those are quite are bit heavier and the 460 has a brake on it). In fact I have never shot any other gun that was as nasty to shoot or kicked as sharply as this 7 RUM out of the box.

After installing a Mercury suppressor in the stock and a Pachmeyer decelerator pad it was comfortable to shoot but still had a very brisk recoil and quite a bit of muzzle jump. I figured this made it the perfect candidate to try the Kahntrol Brake on.

In addition to the brake, I had also mounted a new Leupold 4.5x14 B&C reticle scope for an upcoming antelope trip so the gun needed to be sighted in as well. With everything mounted and two loads that I know shot well in the RUM, 162 BTSP with 84 grains of 7828 SSC in Rem brass with Winchester mag primers at 3.60 LOA, and the same with 94.5 Grains of Retumbo, I headed to the range. (Both of these loads are pushing the 162 grain Hornady bullet north of 3300 fps) It took two shots to get the gun hitting 3” high, dead on the line at 100 yards.

With the bake on there was no difference in group size or shape at 100 or 300 yards. Both loads shot just as good as before, making 3 shot clover leafs at 100 and under 1” at 300. There was however a VERY noticeable reduction in recoil and muzzle jump. The gun felt like something between a 223 and a 243. I checked the brake after the first shot and every two or three thereafter and there was no indication of baffle strikes, as it should be. There was however carbon buildup on the barrel and brake as the number of shots increased. I checked the bolts after 20 rounds and found no decrease in torque.

I was wearing muffs and plugs, as I always do at the range and I did not notice any increase in perceived noise from the brake. I was alone so I did not have anyone to validate whether it was louder to the sides but I would be willing to bet that like all brakes it is. Also, with the amount of recoil reduction it must be pushing a pile of gas to the sides so anyone shooting beside you will definitely feel the blast, though from previous experience this gun makes a hell of a muzzle blast off to the sides even without a brake.

After 30 rounds of very slow fire I felt no soreness in my shoulder nor any other ill effects of shooting, and all I was wearing was a T shirt. I then removed the brake and fired a two shoot group. It hit exactly 1.5” left but on precisely the same elevation, exactly 3” high, as when the brake was on. I adjusted the scope and fired a three shoot clover leaf group that is exactly 3” high, dead on the line at 100 yards. There was a very noticeable increase in recoil without the brake and no perceivable reduction or difference in muzzle blast or noise.

The brake is very well made and fits to the gun well. I would never use a brake on a hunting rifle but this is a great tool for working up loads on guns that tend to beat you up. I could see absolutely no differences in the groups but this is only one gun. I will be interested to try it on a couple of other rifles to see if the results are the same. If they are I will probably order a couple more to cover other barrel sizes.

It is completely effective in reducing recoil and making heavy or medium hitting guns into pleasant to shoot rifles. For range shooting it is the cats pyjamas and because it is so easy to mount and remove it is perfect for use on guns that are primarily hunting rifles as well. The POI shift is easy to adjust for when you remove the brake.

A number of folks asked me to post this after I got the brake and tried it. I hope the info is useful to others thinking about putting brakes on their rifles.
X-2
 

blinks711

Member
LRH Team Member
Joined
Jul 28, 2021
Messages
17
Location
Ohio
Full disclosure, I have no experience with clamp on brakes but I have worked on my fair share of suppressor mounts and gas blocks. Switched over to Rocksett on my applications. Any value of it in this situation over Blue LT? Purely asking out of intellectual curiosity.
 

Cannon3440

Member
Joined
Sep 15, 2021
Messages
13
Location
Central Florida
Glad I read this thread. As and older SOB, my Rem 700 .308 VS SF kills my shoulder after a day of target shooting. Definatly going to order a Whitt brake, especially after reading user reviews on their web site. And, I'm not going to have my barrel machined/threaded or modified in anyway. On a good day, I can pretty much shoot a <0.1" group with it as is, sometimes a hole in a hole at 100yds (yep, I got a good one right out of the box).
 

TennJed

Active Member
Joined
Nov 18, 2012
Messages
44
I'm always in awe of the level of knowledge on this site! I thought I'd have to deal with the recoil of shooting my Ruger American with no brake and was contemplating buying another rifle even after buying a new stock for the Ruger and then having to start all over with all the custom load stuff, but living in NJ where brakes have to be pinned and welded, didn't want to go through all of that. Never thought of looking for a clamp on brake. Thank you to all again!
 

johnnyk

Well-Known Member
Joined
Dec 24, 2001
Messages
2,365
Location
Potters Hill, NC
I have three of 'em; .300WinMag, 7mmRemMag and .270Win. Lot's of guys shoot these cartridges just fine without MB's, I don't care for the recoil headaches and I'm gonna shoot my rifles.
Life is tough but no need for chronic traumatic encephalopathy (CTE), got to use your "Witts". :)
 

Idaho Lefty

Well-Known Member
Joined
Jan 29, 2018
Messages
587
I now have THREE, Witt Machine Brakes !
One on my Semi- auto .223 Rem "Coyote special" ( an SME = Brake + Blast forward, device ), 2 Clamp on's, for .22-250 Rem,( Finally, can see, Sage Rat, Body Parts,.. Flying ! ) and my New, 6 XC and I LIKE them, alot ! These 3, are ALL Varmint / Target Rifles and Muff's Plugs, ARE,. always used !
WON'T ever, put a Brake on, a Walking, stalking, Mtn. Hunting, Rifles that are, used for, Big Game for,.. OBVIOUS, Reasons !
My .243 Win and .270 WSM, ( both Tikka's ), are "Naked" and YES, I wear Plugs, WHEN,.. "Time",.. allows !
Neither Rifle, has that much, "Blast" ( NO, Ear Ringing ) for a Shot or, Two at,.. Big Game !
The 7 mm Rem Mag. and .270 WSM's ARE, the MOST Gun that, I can shoot,.. COMFORTABLY and,.. WELL ( and feel that, NO Brake, needed for them ! )
I estimate that, the Witt Mach Brakes, reduce Recoil about, 30-35% But, I like them BECAUSE of, reduction of,.. Muzzle, "Jump" !
And with, NO loss of, grouping "Accuracy"
 
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