Author Topic: Mercury recoil reducer (Read 7893 times)

tanoose · « **on:** September 27, 2007, 03:43:17 PM »

I finally got a chance to sight in my 45/70 since i cut the barrel to 18" I didn't get to use the chrony but will in the spring.I put a 16 Oz mercury suppressor in the stock and yes they work as compared to the 16 oz steel bar i had in the stock . recoil was stout but the rifle was a pleasure to shoot.i will say it jumped up quit a bit but not so bad on the shoulder. I was using buffalo bore factory ammo 435 grain bullets at there advertised velocity of 1925 fps. This load could stop a freight train I was very happy with the suppressor and wanted to share this with you all in case some of you have been thinking about tring one. I was also pleased with the accuracy of the ammo. Hey Tim i may now be ready to try some of those pile drivers. Later Tanoose

quickdtoo · « **Reply #1 on:** September 27, 2007, 04:55:48 PM »

There ya go!!

Thanks for the report.

Tim

trotterlg · « **Reply #2 on:** September 27, 2007, 05:51:23 PM »

I would love to have someone I think is smarter than I am explain how 16 oz of Mercury reduces recoil more than 16 oz of lead, or even 16 oz rice or 16 oz of

? Mass is mass, 16 oz of air weighs the same as 16 oz of Uranium. Larry

guimus · « **Reply #3 on:** September 27, 2007, 06:17:43 PM »

I'm guessing that mercury recoil reducers work using the fluid properties of mercury.
You get two benefits:
1) increased mass, which will reduce the felt recoil just like any other similar mass
2) delayed recoil, because the liquid mercury will stay in one position momentarily while the gun recoils around it, then the mercury will recoil. This will spread out the total recoil over a longer period of time, reducing any momentary felt recoil

*though I make no claims regarding my intelligence vis a vis yours.

burntmuch · « **Reply #4 on:** September 28, 2007, 02:04:11 AM »

I need to try one because I put a straight gripped camo lam on my 45/70. The recoil is a little more than with the monticaro. I dont care how it works. As long as it works.( Im simple like that). Jay

fanner50 · « **Reply #5 on:** September 28, 2007, 04:56:42 AM »

I agree with burntmuch "If it works who cares?" I have installed at least 30 of them and the results have always been great. I recomend it for young people, ladies, and guys that are recoil shy(like me). It was explained to me that the mercury counter acts the recoil of the gun. They make a modle that goes in the tube and forend of shotguns. Either way it shure works. puttin one on my straight grip 45-70 for sure. JMHO - F50

SHOOTALL · « **Reply #6 on:** September 28, 2007, 05:09:43 AM »

i have one for my super-X2 , i was told the mer. does not start to move as the gun is fired and connects with the front of the container slowing recoil .
i would suspect the steel rod would move with recoil and not reduce felt recoil as noticeably .
i have shot my gun with and with out and it works ! I have it on a 3 1/2 inch goose gun !

cascadedad · « **Reply #7 on:** September 28, 2007, 06:28:19 AM »

Quote from: trotterlg on September 27, 2007, 05:51:23 PM

.......16 oz of air

tanoose · « **Reply #8 on:** September 28, 2007, 10:37:14 AM »

Yes it works i guess the mercury moving forward takes away some rearwood recoil . I just had to try one as my friend who has problems with his neck cant sit for any length of time at the range with his handi 30/06 he told me that with the MRS he has a 30/06 that kicks like a 243. So i just had to see for myself.And i didn't change the pad i am still using the one that came with the rifle, and i must say these pads are very good.I usualy would go with a pachmayer decelerator or limb saver but have been told by many who hunt africa with the heavy recoil rifles that the pachmayer F990 cant be beat so i think i will give one a try . Later Tanoose

burntmuch · « **Reply #9 on:** September 28, 2007, 10:40:20 AM »

Where can ya get one & how much?

cowboyup453 · « **Reply #10 on:** September 28, 2007, 10:50:19 AM »

Here ya go.
https://1977274750.monstercommercesites.com/index.asp?PageAction=VIEWCATS&Category=245

quickdtoo · « **Reply #11 on:** September 28, 2007, 10:52:48 AM »

Best price I've found is at MPC, they sell the 16oz that fits in the wood stock for $35, don't bother getting the removal tool, a ¼"-28 x 4" cap screw bolt will work fine for less money! The 7/8"x 5" 16oz C&H mercury recoil reducer fits fine in the stock bolt hole of any of the wood stocks, it works better than a lead "dead mule" weight in the stock and weighs less, I've used both. I put a leather pad on the front of the MRR to cushion it against the stock bolt, cut some PVC pipe so it fills the gap behind the MRR to the recoil pad, use the ¼"x4" bolt to install and remove it thru the PVC pipe. Put a wrap or two of electrical tape around the MRR and PVC pipe so it doesn't rattle in the stock.

Tim

http://www.gboreloaded.com/forums/index.php/topic,112769.msg1098350930.html#msg1098350930

preventec47 · « **Reply #12 on:** January 30, 2010, 11:19:15 AM »

I have to go along with Einstein and Newton. Mass is mass and
inertia is inertia. There is no way any lighter weight fluid like mercury
is going to damp recoil more than any heavier mass that is firmly affixed.

I have to insist that the Mercury recoil devices are marketing scams.
Not saying they dont work but they must be more expensive unless
the same weight mercury is cheaper than lead or other heavy
substance.

I find it mildly amusing if there is any space in the cylinder holding
the mercury that the mercury will have some movement during
recoil. Think about it. During the first half inch of rifle recoil movement
the mercury is not reacting until it is all bunched up at the end of the container. THEN you get some delayed inertial damping but no
more or less than if it were solidly affixed. Laws of physics say so.

IF the claims of mercury movemet were true, you could accomplish
the same thing by putting a piece of rebound rubber in the stock
and then add a steel or lead weight that could move around.

Let me finish by saying if indeed they are using real mercury
in the amount of 16 ounces, that is a
MAJOR ENVIRONMENTAL DISASTER
waiting to happen. ! ! !

Consider that mercury is now illegal for use in thermometers
and how little is used in one compared to a mercury recoil device.

If any of you guys know how incredibly toxic mercury really
is you would know they should shut that company down immediately!

You have read about the tainted chinese toys and lead paint
and how not to eat predator fish etc. This is millions of times
more concentrated and deadly.

IF that company wanted to put movable weight in a container,
the could do the same exact thing with lead or even better
bismuth pellets in the tube. It would act exactly the
same as liquid but might be a little more noisy.

Badnews Bob · « **Reply #13 on:** January 30, 2010, 12:50:21 PM »

Quote from: preventec47 on January 30, 2010, 11:19:15 AM

I have to go along with Einstein and Newton. Mass is mass and
inertia is inertia. There is no way any lighter weight fluid like mercury
is going to damp recoil more than any heavier mass that is firmly affixed.

I have to insist that the Mercury recoil devices are marketing scams.
Not saying they dont work but they must be more expensive unless
the same weight mercury is cheaper than lead or other heavy
substance.

I find it mildly amusing if there is any space in the cylinder holding
the mercury that the mercury will have some movement during
recoil. Think about it. During the first half inch of rifle recoil movement
the mercury is not reacting until it is all bunched up at the end of the container. THEN you get some delayed inertial damping but no
more or less than if it were solidly affixed. Laws of physics say so.

IF the claims of mercury movemet were true, you could accomplish
the same thing by putting a piece of rebound rubber in the stock
and then add a steel or lead weight that could move around.

Let me finish by saying if indeed they are using real mercury
in the amount of 16 ounces, that is a
MAJOR ENVIRONMENTAL DISASTER
waiting to happen. ! ! !

Consider that mercury is now illegal for use in thermometers
and how little is used in one compared to a mercury recoil device.

Ah yes but consider this, I have two of them and they work.

preventec47 · « **Reply #14 on:** January 30, 2010, 12:56:50 PM »

I never claimed they wont work. Just that they wont work
any better or worse than an equivalent amount of weight
of "anything". If you have enough space or large enough
container and want a liquid, then use WATER.

quickdtoo · « **Reply #15 on:** January 30, 2010, 01:06:45 PM »

Having used both back to back in the same rifle with the same loads, I say the MRR works better than an equal or even more dead weight in reducing felt recoil, this has been discussed before, use what you want.

Tim

kite · « **Reply #16 on:** January 30, 2010, 04:21:08 PM »

Quote from: preventec47 on January 30, 2010, 11:19:15 AM

...Think about it. During the first half inch of rifle recoil movement the mercury is not reacting until it is all bunched up at the end of the container. THEN you get some delayed inertial damping...

...Consider that mercury is now illegal for use in thermometers and how little is used in one compared to a mercury recoil device...

The first statement partly explains why it works. Distributes recoil over time by the movement of the liquid, in addition to counter acting recoil from 'bunching up'. Not the same as dead weight. Newton's 1st and 3rd Laws of Motion. Think dead blow hammer.

Regarding the second statement: http://www.carolina.com/ sells mercury thermometers.

just sayin'...

45-70.gov · « **Reply #17 on:** January 30, 2010, 04:48:55 PM »

i was with the mass i mass bunch at first

when the solid mass hits you it hits you with the gun simultaneously

with mercury the gun hits you followed by the mercury

also the gun moves back hits the stationary mercury

besides ya''ll say it works it must

i think a weight with opposing spring
could be designed to do the same thing
get to work you tinkerers out there

LONGTOM · « **Reply #18 on:** January 30, 2010, 05:04:24 PM »

The first explanation is correct and they do work.
I have a 16oz one from C&H in a custom Win model 70 in 270 mag that weighs only 5.2 lbs with the scope and a full mag.
Still kicks but not nearly as bad.
Wish they would of had SIMS pads back when I was shooting it in the 70s.
The MRRs do work better than just dead weight.
$35.00 is a good price.
I gave close to that back in the 70s.
I believe it was $28.00 back then.
Thought they were higher than that now.
May buy a few more.

LONGTOM

Jacko · « **Reply #19 on:** January 30, 2010, 05:52:09 PM »

Mercury is a metal that is liquid at common temperatures, its melting point is about -40 degree's Celcious. Yes it's mass helps as well but under recoil Mercury forms into numerous beads thus absorbing a % of the energy that would be felt as recoil. As the recoil / vibration impulses disapate the numerous beads of Murcury return to a single state. There needs to be a small amount of airspace in order for Mercury to do it's little trick. Completely fill the recoil reducer with Murcury and it will act as though it where full of Lead.

It's been used for an effective recoil / vibration dampener in Archery bows for years but these days the enviromental concerns have eliminated it's being used in new manufacture stabilizers. Its been replaced with a graphite powder or rubber washers which absord the recoil and vibration in the same manner as recoil reducers buy moving independantly of the transmitted energy. The mass side of things is taken up with brass counterweights.

There is firearm recoil reducers on the market that follow the same construction as Archery bow stabilizers and they work quite well.

regards Jacko

1NEFsofar · « **Reply #20 on:** January 31, 2010, 08:09:00 AM »

This is an interesting discussion to say the least. I prefer to use lead shot over the mercury suppresors. I can pack quiet a lot into the bolt hole in the stock (I guess I need to weigh it sometime) and it should have a similar effect. The shot absorbs the recoil by transfering some the recoil/impact to the shot and lessing the effect on the shooter. I have done this in my varmit stock as well as my survivor stocks and it has done wonders!! My 223 doesn't hardly move and my 308 only has barrel jump but minimal recoil. Also my slug gun has been tamed quiet a bit by it and we all know how those buggers kick!

Anyway, for my daughters gun, I will be putting lead in the stock to help out.

gendoc · « **Reply #21 on:** January 31, 2010, 08:53:18 AM »

quote--- and how not to eat predator fish.

i guess i musta missed something there !!!!

just about all fish eat others........

down here we eat black tip sharks like eat'n beef.

and speckle trout and redfish like eat'n candy.

Mike in Virginia · « **Reply #22 on:** January 31, 2010, 02:47:32 PM »

A 435 grn. bullet at 1925 fps! Lordy. I got to get some of that Buffalo Bore stuff. That's a heck of a lot of energy that would carry as far as I can see. No doubt I'd want some kind of recoil assistance. I don't know about the Mercury thing, but I do know a load like that has got to stomp you pretty good.

Rayzor · « **Reply #23 on:** February 03, 2010, 05:05:55 PM »

After reading all this I finaly have a idea to submit to the Myth busters. I did put one in my 12 gauge handi and it sure helped, so....

Glockfan · « **Reply #24 on:** February 03, 2010, 06:47:56 PM »

Think of seismic waves... vibration. Vibration travels faster through a solid surface which is more dense with a rigid molecular structure than it does through a liquid. This is how they measure seismic waves and are able to determine roughly the composition of the Earth's core and mantle. By measuring the rate at which the waves move. If it slows the vibration by passing through a liquid which would require more energy for the force to pass through it would then reduce recoil. That is how recoil pads reduce recoil as oppose to having a bare solid stock. It slows the energy movement and force behind the vibration. Do you run faster on a solid road or in sand? The sand gives under the force of your body and thus causes you to exert more energy to move at the same rate of speed.

Hope that helps