Browning rifles with BOSS system

It's not a choke, it's called a "tuner". It allows you to match the way the barrel vibrates to a given load, rather than changing to load to match the way barrel vibrates.

It works well, although there is a fair amount of setup for a given load. So it makes sense IF you plan to use one specific load in the rifle. You'll shoot up a fair amount of ammo if you change around a lot.

Most BOSS rifles come with a muzzle brake weight, which has the advantages (reduced recoil) and disadvantages (hellacious noise) of any muzzle break. Browning does sell the a non-muzzle brake weight as the CR version.
 
The goal isn't really to reduce the vibration, but rather match the vibration to the barrel/load. As noted above, you can get a non-muzzle break version of the BOSS weight that won't increase noise.
 
these guys have pretty much summed it up... I will add, it does reduce the felt recoil alot... perhaps both because of the additional weight at the muzzle, & the ports... I have both a 338 Win Mag & a 375 H&H Stainless Stalkers, both with BOSS... both are more accurate than I am, & neither one is much different than shooting a .308 / 30-06

BTW... I don't personally think it's louder than the same rifle without the BOSS & with a 2" shorter barrel... the ports are not angled towards the shooter, so the "effect is no different than a 2" shorter barrel
 
Some of the other posters summed it up nicely on how the BOSS works so really nothing I can add to that. I will say I have the BAR Safari in .270 and just using the recommended settings in the owners manual, can constantly put 5 rounds of Winchester 130gr Ballistic Silvertip in under 1" at 100 yards. I wouldn't be surprised if I couldn't improve by messing with dialing it in but I'm very pleased with the performance so I don't bother. It is loud if you're shooting off a bench that has a roof over it but out in the woods or field, you don't even notice it. It's amazing how much it does reduce recoil and if you are sensitive to the blast, they also come with an attachment that's not ported that functions the same but the recoil and muzzle report is the same as any non-BOSS rifle. If given the choice, I will opt for the BOSS everytime as I think it's that beneficial.

As far as caliber goes for your intended purpose, the .30/06 is a fine choice but I would take a long hard look at the 7mm Remington Magnum. A little flatter shooting and with very few exceptions, harder hitting then the '06 and ammo easily available although not as many options in various weights as the '06. A little much for Pronghorns but not overkill and with some of the distances you may actually find yourself shooting at, the extra punch would be appreciated especially if it's on a large bodied Muley or an Elk.
 
Could one not achieve the same goal - reduce the harmonic vibration and improve accuracy - by using a barrel de-resonator? You could avoid the increased report caused by the Boss system.

JoeChicago
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I played with the LimbSaver de-resonator on my Ruger which was already a sub-MOA rifle. I moved it all over and didn't see any improvement, however I know it works on rifles that don't shoot good groups from talking to others at the range. Looks like heck though. I don't think it's nearly as effective as the BOSS system but a whole lot cheaper.

Schroll down on this link and look at the "AIM" system installed by Gander Mountain gunsmiths....
http://www.gandermountain.com/gunsmith/accurizing.shtml

When I'd run into a wall trying to get better groups out of a rifle with a free floated barrel I'd try putting pressure on the barrel. On some rifles this works!

.
 
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Browning claims their BOSS adjusts the barrel whip frequency so the bullet leaves when the barrel's stationary. Impossible.

The barrel's never stationary after the primer detonates and burns the powder creating a pressure curve. It wiggles and whips all the time the bullet goes down the barrel and continues for a bit after the bullet's left.

If someone thinks the best place for the bullet to exit is when the muzzle axis is at its highest angle, they need to rethink that. Browning's never proved this happens with their BOSS. Neither has anyone else as far as I know.

'Twas proved over a hundred years ago that the best place for bullets to exit is just before the muzzle angle reaches its highest value as it swings up. Handloading ammo can do this; use the powder charge that gives the smallest many-shot groups at the desired range. With factory ammo, the BOSS may be adjusted to accomplish the same thing, but there's no guarantee.
 
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I've been intrigued by the BOSS system since it appears it actually works to improve accuracy, moreso since I own a BAR-based FNAR. Does the device just screw onto a threaded barrel, or is there more to it than that? It's basically a position-adjustable muzzle-break/weight, right? I'm suprised other makers aren't ripping off the concept (patents, I guess...)

TCB
 
Browning claims their BOSS adjusts the barrel whip frequency so the bullet leaves when the barrel's stationary. Impossible.

The barrel's never stationary after the primer detonates and burns the powder creating a pressure curve. It wiggles and whips all the time the bullet goes down the barrel and continues for a bit after the bullet's left.
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You're right, the barrel does "wiggle and whip" from the moment the cartridge fires until well after the bullet is gone.

However, while the barrel is wiggling, there are brief moments when the barrel is indeed stationary, just as the barrel stops wiggling in one direction and before it starts wiggling in the other. That's when you want the bullet to exit and tuning the BOSS allows you to find that sweet spot.
 
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Nobody, including Browning, has proved bullets leave at the top or bottom of the muzzle axis swing with the Boss set for best accuracy. One can adjust charge weight 1/10th grain and do the same thing as a quarter turn of the BOSS ring. And no powder charge makes pressure curves exact enough to make all bullets leave at the exact moment the muzzle axis is stationary

It has been proved that best accuracy is when bullets exit just before the muzzle axis reaches its highest angle which more easily and better corrects for velocity spreads.
 
Nobody, including Browning, has proved bullets leave at the top or bottom of the muzzle axis swing with the Boss set for best accuracy. One can adjust charge weight 1/10th grain and do the same thing as a quarter turn of the BOSS ring. And no powder charge makes pressure curves exact enough to make all bullets leave at the exact moment the muzzle axis is stationary

It has been proved that best accuracy is when bullets exit just before the muzzle axis reaches its highest angle which more easily and better corrects for velocity spreads.
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I'm not quite sure what point you are trying to make. First you say it's unproven, then you say it's proven. If you want to quibble about whether the best spot is "just before the muzzle axis reaches its highest angle" instead of standing still, please explain why. I'll grant you that while the muzzle is moving slowly just before it stops is easier to find than when it stops, but I don't see how it's better. Perhaps a citation to your proof would explain it.
 
Once one understands the ballistics for a given muzzle velocity in a 40 fps spread and the departure angle each needs for a given bullet to strike the same place on target, it is easy to figure out where in the muzzle axis vertical swing it's best for all the bullets to leave at. It ain't rocket science. Remember that lower muzzle velocities leave later than higher velocities.
 
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Once one understands the ballistics for a given muzzle velocity in a 40 fps spread and the departure angle each needs for a given bullet to strike the same place on target, it is easy to figure out where in the muzzle axis vertical swing it's best for all the bullets to leave at. It ain't rocket science.
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It ain't any kind of science at all as far as I can tell.

Again, got a citation?
 
Skip the high level math formulas and look at the last page. That's the best part.

http://archive.org/details/philtrans05900167

On the left side, click on PDF in the "View the book" window.

Simple reasoning is that for slower bullets to strike the same place as faster ones, they all have to leave when the muzzle axis is on the upswing. No other part of the arc lets that happen.
 
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Anyone using a BOSS equipped rifle for long distance shooting? Any adverse effects? I only really see reviews for people shooting at 100 yards or so. Im looking at an M1000 Eclipse in .300WM.
 
derelict said:
Anyone using a BOSS equipped rifle for long distance shooting? Any adverse effects? I only really see reviews for people shooting at 100 yards or so. Im looking at an M1000 Eclipse in .300WM.
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True most people are zeroing at 1 and 200 yards but tighter groups are tighter groups. It applies at all distances.
 
I have a stainless stalker in 338 Win Mag with a BOSS, that I'll be changing over from a hunting rig, to a longer range target gun over the next 6-12 months... the 4-16 Burris Posi Lock scope will come off, & a good long range scope added, with resettable to zero turrets... over the last year, I ended up getting over 500 new cases ( bought a 5 gallon pail at the local gun show, factory rejects that didn't have flash holes, ( which I've since remedied ) otherwise they are perfect, & of course unfired... so I plan on developing some good handloads for this cartridge, & will see how the Boss system works for longer ranges...
 
I figured that tighter groups are tighter groups but was hoping that there might be some feedback from people using them to take longer shots.

Is there any reason why the new X Bolt rifles do not come with this as an option? That is why I am asking. Im not a big game hunter anymore spending more time fly fishing than anything. I will take the odd trip West to see family and am a member of a long distance (500+ yard) range so Im looking for something with longer range ability than the .270 Ruger No. 1 I used to hunt deer around here (max shot was usually 80 yards).

I am really interested in the BOSS system since I really have no interest, nor the time, to hand load.


Are any of these Browning rifles having feeding issues with the WSM? I really wish they offered a traditional 7mm.
 
what is a boss

Contrary to some reports it is neither a weight adjustment or a choke. It is a system that allows you to match the barrel to the load rather than the load to the barrel. Reducing the time consuming powder variations on multiple loads when building a load for a gun to group well. It is accomplished by micro adjusting the length of the barrel so that the bullet exits the barrel in the neutral plane during its harmonic vibration of which all guns do no matter how heavy the barrel is . Granted fluted bull barrels may be above average but they still vibrate. The neutral plane is when the barrel hesitates in the whipping which occurs many times during a shot.It is a matter of a given speed and time matching perfectly to the barrel. Also remember it takes the perfect steady hand to actually see these results. It does however tighten groups of a given round from say 1 1/2" to dime size and that is huge from 300 to 1000 yards. It is the difference between a hit and miss if you are steady ,calculate wind and elevation correctly. I am friends with 3 others besides myself and we are sold on the boss because we have witnessed the results.
 
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