pillar bed question

B

bow shot

New member
Am I foolish to think that eliminating all contact between the action and the stock of my rifle is "good", if I have good contact between the stock and the recoil lug?

I have reason to ask this... I've read up on the subject of pill bedding, glass (or epoxy) bedding, and the typical combo style bed job and it gets pretty foggy after 3 months of googleing...
 

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I think the goal of pillar bedding is to have a flat surface to mount your action to, to make everything more consistent. I think when they glass bed you put a little pressure on your barrel, but so it doesn't move.
I am no expert, and this info could be false but that was my interpretation of the things I have read.
 
You definitely want full contact between the action and the stock, but not necessarily between the stock and the barrel. Pillar bedding just keeps people from crushing the stock when they put action screws in (no, it's not OK if your knuckles turn white).
 
Some and proper contact is important.

Contact between the action screws and the stock is not desirable. If you glass bed the action, drill out the glass enough to relieve the screws.

Contact between the front of the recoil lig and the stock is also something to avoid.

As said, piller bedding is to prevent crushing the stock when the action screw are tightened.

Personnaly I like all my hunting rifles to have the barrel totally free floating.

Some rifles do group better with some amount of barrel to stock pressure, but this leads to the potential of shots being "off target" due to changes in stock pressure form hot/cold - wet/dry conditions, or because the rifle is held or rested differently.

For consistant hunting groups, a fully floated barrel wins hands down in almost every case.

Keep em coming!

Crusty Deary Ol'Coot
 
this is what I'm thinking...

Is there any reason to have contact between the stock and the action at all if the recoil lug is indeed making contact? Seems to me its only an opportunity to introduce bending influence to the action if the action screws aren't torqued to some "perfect" degree.

I've been reading on this stuff till my eyes bleed, and I'm starting to develop my own opinion... which may be absolutely stupid, so I'm looking to the hombres for wisdom.
 
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gonna re-post

Just changed the thread title, and moved the picture to the top. I changed to a more appropriate title. 'Trying to get some visibility from the wise grey-headed ones...
 
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The only problem with the action touching the stock, with the exception of those issues listed above, would be if your putting the action in a bind.

I personaly like to bed the action BEFORE floating the barrel, as the action is given a bit more support during the glassing process.

You can loosen the front and rear action screws, one at a time and watch how the action does or does not move.

If it moves, is it because of upward barrel pressure? For example the front of the action raising out of the action posssibly because of a lot of barrel pressure.

Or maybe with the front screw tight, the rear tang raising because there is pressure or a twist between the stock and the action.

Watch and see how this situation plays out.

If I saw the front of the action lifting because of barrel pressure, I would glass the action, making sure the action screws - front & rear - were tight during the cure time.

Then I would float the barrel and after that again see what happened with pressure/twist in the barrel.

A person can always add a bit more glass, if needed, to get things solid.

I like to drill the screw holes - in the stock - out as far as possible, without showing on the outside, then fill the holes with glass during the bedding process.

After that, as I mentioned before, relieve the screws by running a drill slightly larger then the screw through the cured glass.

This will give you a "piller bed" with glass.

I also like to remove a lot of wood in the recoil lug area, taking care to allow enough wood to remain so as to assure proper positioning of the barreled action during the process.

Properly mixed and cured, Acraglas is VERY!!!!!! strong!

I cannot say enough about prep before mixing the glass.

Pay me now or pay me later, it not properly done ahead of time, you will wish you had not even started, that is unless you really want an action forever stuck in your stock.

Use the release agent as directed, then put a dolip of grease in the action screw holes and coat the action screws with a light coat of grease - ON TOP - of the release agent.

Before mixing, take some electrial tape and tape the front and bottom of the recoil lug to prevent contact in these areas after glassing is finished.

REmove all parts from the action that could possibly come in contact with the glass.

The glass can and most likely will get where you don't want it unless prevented, WHICH CAN CAUSE GREAT!!!!!!!!!!!!!!!! problems.

Modeling clay can be used to fill voids where glass is not wanted.

BE aware that once the glassing process is finished, the stock and action will not want to come apart. THEY WILL BE TIGHT!!

Once the action is cleaned up, tape gone, clay removed, excess glass removed, they will fit snugly but not excessively tight.

I like to have a stack of double toliet paper squares already torn off the roll and ready to go before the glassing begins, as the glas WILL get places you don't want it, and needs to very quickly be cleaned off the stock etc.

As I said, pay me now or pay me later, don't mix the glass untill EVERYTHING is ready!

Read and heed all directions.

And personaly, I have liked the results of the liquid Acraglas better then the jell. Harder to handle maybe, but does a better job.

Keep em coming!

Crusty Deary Ol'Coot
 
and..

...I see I wasn't real clear in the original post.

I'm asking if it would be "good" to leave total a total void under the action (ie., "air") except for where it contacts the pillars, and where the recoil lug contacts the stock.
 
Unless your "pillers" had some sort of flat on them for a flat bottomed action or round cradle for something like a Remington action, the action would not be stable without additional contact .

There should be good and full contact in the area of the recoil lug, except for front and bottom of the recoil lug.

For many actions, it would be very hard or impossible to have "full length" glassed contact between the action and the stock.

In many cases there is not room between the magizine box and the stock for much if any "bedding."

However, bed around and below the front recoil lug and below the rear tang, taking care to prevent springing the action when the screw are tightened. See my last post.

The goal is for stability and consistancy in contact between the action and the stock, provided by proper contact.

I can see no real advantage in attempting to minimize this contact and in fact a number of the manufactures go to great lengths to produce a stock including a full length of the action - aluminum bedding area - to maximize this contact and stability.

If the quality of the stock is doubtfull, meaning subject to great amounts of movement as the weather changes, the answer would be a laminated stock or possibly a quality synthic stock.

Thinner and more lams are better and more stable then less and thicker lams.

I have, in 40 years or so, never had a factory stick give this type of problem, ***** ONCE ***** the action was bedded as indicated above AND the barrel was floated.

I have however, seen great shifts of impact before floating, simply because of changing the point at which the stock was rested during firing or because of the attachment of a stock mounted bi-pod.

If however, you are going the direction of a high end bench rest setup, we are talking about a totally different breed of cats. What I have tried to outline is done to produce consistancy of shot placement in a hunting or varmit class rifle.

Keep em coming!

Crusty Deary Ol'Coot
 
that's what I thought...

the pillars in the VLP are flat topped, and the botton of the action has a radius, so it seemed pretty flimsy to me.

So I'll heed the wisom and continue with the conventional bedding job.

Here's to better groups!

Is there a way to add pillars and epoxy to a shooter and fix his problems too? LOL!!

Yes I'm a believer that the position of the bags makes a difference in the group. My beloved 6.5x55 must have the front bag directly under the barrel/action joint, and I have to be directly behind it, with the tip of my thumb steering from the rear swivel stud. The Savage VLP .204 likes the front bag a little forward, but I'm not solid on the rest of the form for that gun yet. It goes a little poo-poo when I use the bipod.

Coot, do you know of a good way to experiment with bipod mounting? Does anyone have success with mounting alternate studs for the 'pod?
 
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Morn'in Bowshot.

I have thought about putting a second sling stud on the forend for bi-pod mounting, as I don't like the mounting of a sling to the bi-pod.

Doesn't seem very secure to me!!!!!!!!!

As to the "piller bedding for shooters", it a very simple process. NOT pain free, but simple.

The shooter simple, STOPS!

EVERYTHING!!!!!!!!!!!!!!!!

Coffee, NO! Smok'in, NO!!!!!!!!!, drink'in no NO!!!!!!!!, breath'in - only in moderation. Best to stop everything. Most folk get real steady after awhile if they follow these recommendations.

AND, no cheat'in!

Back to the bi-pod thing ---- oldest son had a heavy barrel 6mm that shot quite well.

We went after rock chucks and he was over shooting. So, Jeff took some rested shots at a rock bluff out aways, rifle rested on a sling stud mounted bi-pod - and sure enough the rifle was hitting waaaaaaaay high.

Later, I bedded and floated that rifle and that was the end of the forarm pressure induced changes in point of impact.

Have a good day an, Keep em coming!

Crusty Deary Ol'Coot
 
Yep, we are all, at least most of us, still learn'in and are just indifferent stages in the process.

I just bought a new to me #1-s in 45/70 with the goal of casting my own bullets for hunting.

I have cast for years, but mostly for handguns, so this will be a learning experience.

I have owned a number of the single shot RUGERs and loved the RUGER #1, probably since I saw the first advertisement.

Now bedding and floating a two piece stock is a bit different, but it can be done with good results, so that will be coming up along with the casting of what I hope to be bullets worthy of hunting, putting a piece of ebony on the forend, installing a new (read thick an soft) butt pad and glassing the butt stock to the action.

All in good time.

The components, dies, bullet mold etc. are on the way, so should be a fun summer doing tests with a cast bullet rifle.

Keep em coming!

Crusty Deary Ol'Coot
 
Bedding:

The purpose for bedding a barreled action to a stock is to provide a tension free register that is inert to changes in ambient weather. (temperature, humidity, etc)

The resin should have the following traits:

High shore hardness
Minimal shrinkage
High compression strength
High shear strength
High resistance to acids and alkalies

Bedding a portion of the barrel or floating it completely is an often debated topic. I've bedded close to a thousand rifles in the 13 years I've been at this trade (career). Some actions respond well to a bedded barrel, others don't require it.

As a general rule, I do not bed the barrels as it can greatly complicate things. Barrel swaps require bedding all over again for instance.

Here's what bedding won't do: It can't polish the proverbial "terd". A gun that sucks is only going to suck slightly less with a properly bedded action. A great rifle can become exceptional. It's a minimal gain but it's viable when done properly.

Here's an example of what mine look like: With care and attention to detail these results are attainable by anyone.

Good luck.

C

DSC_0013-3.jpg


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DSC_0033-3.jpg


DSC_0034-5.jpg
 
My shpeal on bedding Mausers:
My system for bedding this kind of barreled action is that epoxy is in 4 places:
1) behind the recoil lug
This epoxy is to be a "low compliance" [stiff] and consistent connection of the recoil force to the stock.
2) under the flat part of the receiver for the square inch behind the recoil lug. This is contiguous with behind the recoil lug epoxy.
This epoxy is to be a low compliance and consistent connection of the bullet spin reaction force to the stock.
3) under the first inch of barrel in front of the receiver. The epoxy only goes up 45 degrees from the bottom on the sides of the barrel.
This epoxy is to be a low compliance and consistent connection of the front action screw force to the stock. That force is already supported behind the recoil lug and needs to be supported in front of the front action screw.
4) around the pillar that supports the rear tang of the receiver. The pillar is pre compressed, perpendicularly aligned, and flush to receiver aligned, with a small diameter head action screw. The pillar is scored and the stock hole is tapped so the epoxy gets traction. I make pillars from 3/8" outside diameter 1010 steel tubing.
The rear pillar is to be a low compliance and consistent connection of the rear action tang force to the stock. The rear pillar acts as the 3rd dominant point in defining the plane of the barreled action to stock connection. The other two dominant points are the two sides of the flat epoxy for the inch behind the recoil lug.

After the bottom metal is bedded in front and the rifle is assembled, the rear pillar should support the bottom metal in the rear. The magazine engagement the receiver is checked for feeding. The bedding job is tested by banging the barrel with a palm while griping the stock wrist with the other hand. The sound should be high frequency with long sustain and no buzzing. That is because the barrel is floated in the stock and the two act as a tuning fork, while the wrist is at a node. High frequency with high mass implies low compliance. The sustain is from the low losses due to low compliance coupling. We want low compliance so the barreled action mass and stock mass are effectively summed in reaction to the recoil before bullet escapement. The higher the mass rifle, the easier it it to control recoil and get accuracy. The buzzing would mean there is not enough clearance some where.

Shoot the rifle. Then put some piece of dirt between the action and the bedding. It will not make the same sound and it will not give the same accuracy, as the compliance of the fit has been raised. Then clean that dirt out of there:)

What does it all mean?
Epoxy does not get on the sides of the receiver.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Here are the experts:
http://riflestocks.tripod.com/bedding.html
http://www.charm.net/~kmarsh/glasbed.html
http://yarchive.net/gun/rifle/pillar_bedding.html
http://www.gun-tests.com/performance/nov96beddingjob.html
http://www.ranchtrippin.com/bedding/
http://www.scorehi.com/main.htm
http://www.6mmbr.com/pillarbedding.html
http://www.brownells.com/aspx/NS/Store/ProductDetail.aspx?p=9899
http://www.brownells.com/aspx/ns/store/catSearch.aspx?c=1418
http://www.z-hat.com/Accurate.htm
http://www272.pair.com/stevewag/mmrifle/mmrifle3.html
http://www272.pair.com/stevewag/turk/turkbed1.html
http://www272.pair.com/stevewag/turk/turkbed2.html
http://www272.pair.com/stevewag/turk/turkbed3.html
http://yarchive.net/gun/rifle/remington700.html
GRIF.jpg
Click to expand...
 
Before everyone scatters after answering bow shot's questions, I need help on bedding also. Just to make sure I have everything straight, let me give you my impression on bedding since I have one to do soon.

Assume we are talking about a simple cylindrical action (think 700 Rem or 110 Sav) which has been glass bedded into a wooden stock with the barrel free floated. My conception is that when finished:

1. The barrel is free floated.

2. The recoil lug is not in contact with the stock except for the rear face of the lug. The rear face will be, in effect, in full contact with the stock because glass has filled any small voids which may have previously existed between the rear face and the wood.

3. If there is a magazine, it will be isolated from the stock. (Okay, so the magazine spring may or may not be resting on the bottom of the magazine well.)

4.The entire trigger mechanism is isolated from the stock.

5. As part of the bedding, the two action screw holes were enlarged and filled with glass and the properly coated action screws inserted to draw the action down into the soft glass bedding during the cure. After cure the screw holes were drilled out slightly oversize to form what might be called a "glass pillar." The purpose of this was to avoid contact between the action screw shanks and the glass. The only contact between the action screws and the stock is achieved by the clamping action of the screw heads against the bottom face of the "glass pillars." (Had a true metal post been desired it would have been inserted during the bedding process. The same "no contact between screw shank and post" would have held true.)

6. The action body (talking abut anything not already covered above) is now snugly resting in its new glass bed. That is, through full contact with the glass bedding it is in full contact with the stock from the mid waterline of the cylindrical body down, and from just behind the recoil lug aft so as to include the rear action screw "glass pillar."

Please correct any error in the above concept.


Question: to what inch-pounds should the front and rear action screws be torqued?

UPDATE: This request was made without my seeing the immediately preceeding post by Clark which introduces the bit about not bedding the sides of the receiver. Clark, does this procedure apply only to the Mauser or should I heed this technique as well? Thank you.

John Seymour, a man up on Lookout Mountain in extreme NW Georgia
 
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on that Savage...

...there is very little area to bed (normal style action, with blind box magazine):

1) Most of the bedding area is in the vicintity of the recoil lug
2) there is a tiny amount of area to bed at the rear action screw (which is the forward screw of the trigger guard).
3) There is no action screw at the tang

So the question is this: Im reading that the tang area should be floated..
but I don't understand the function of doing that, since there is so little bedding area left!

What don't I get??
 
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