Rem 700 factory lug thickness and switching barrels

[urbanrifleman]

Say I want to move a shouldered barrel from one 40x action to another. Is there an easy way to reindex the barrel and set the headspace?

What is the stock lug thickness on a 40x?

 

[jpretle]

I have measured them from .181-.190, w/ most being .186-.189

 

[joshb]

I'm pretty sure boltfluter can make you a custom lug, if you need it. I think I remember him getting set up to do that.

 

[hoz53]

Say I want to move a shouldered barrel from one 40x action to another. Is there an easy way to reindex the barrel and set the headspace?

What is the stock lug thickness on a 40x?

some people make recoil lugs to certain thicknesses to get the barrel from another gun to headspace right. most would say you need a surface grinder to grind the lug to a thickness required. you might get lucky and the barrel headspaces correctly though.

 

[hoz53]

I have measured them from .181-.190, w/ most being .186-.189

thats good info, i assumed they were all the same (within tolerance) i wonder if they sometimes adjust headspace at the factory by using different thickness lugs.

 

[hogpatrol]

IIRC, there are punch marks on Remington lugs. Pick the right one to headspace.

http://forum.accurateshooter.com/threads/remington-smithing-note-from-a-buddy.3898371/#post-36739156

 

[shortgrass]

It appears OEM Rem "barrel brackets" (recoil lugs) are a stamping. Measurements are all over the place. Mic on one side might say .187" and straight across from there might be .188". No consistent thickness from one side to the other, or top to bottom. That is why a custom, ground lug is preferred. For the even thickness, not necessarily the added strength. The hole needs to be as close to 90* to the flat sides as possible, too.

 

[akajun]

I miked all my leftover factory lugs, most were within .001 if each other. The big issue is that all were warped, you could Rock them on a granite surface plate.
I surface ground them all, taking about .002 off each side to get them flat. When grinding it revealed some were twisted, some curled like a potato chip, etc. I think that is where the fault lies in a factory lug

 

[urbanrifleman]

IIRC, there are punch marks on Remington lugs. Pick the right one to headspace.

http://forum.accurateshooter.com/threads/remington-smithing-note-from-a-buddy.3898371/#post-36739156

Oh my gosh that is cool.

 

[carlsbad]

When I do this job, I put on a .250 recoil lug, move the shoulder back, and double check all the other dimensions involved in fitting a barrel to a bolt nose.

 

[butchlambert]

I use factory lugs, but I do have a surface grinder. I also have recoil lugs fitted and attached to the bottom of the receiver.

 

[urbanrifleman]

I use factory lugs, but I do have a surface grinder. I also have recoil lugs fitted and attached to the bottom of the receiver.

I had my main rifle lug pinned. I am trying to get my others pinned, and it is like a 6 month wait for an hours worth of machine work!!!

 

[butchlambert]

I had my main rifle lug pinned. I am trying to get my others pinned, and it is like a 6 month wait for an hours worth of machine work!!!

Look up Rex Reneau in Okie City.

 

[urbanrifleman]

Look up Rex Reneau in Okie City.

It is too late. I cannot send off my action now. Season is coming. Go to get to working up loads and practicing!!

 

[hoz53]

It is too late. I cannot send off my action now. Season is coming. Go to get to working up loads and practicing!!

to drill a hole in a lug is pretty simple. they do have a tool you could get from brownells to keep the lug strait. to me the pinned lug is convieience. ive tightened barrels without pinned lugs lots of times by using shims. you can figure out how thick a lug you need and take one to a local machine shop and have them surface grind it for you and drill it for a pin for that matter. seems simple to me. oh and if you do this id use an after market one not one of the junk factory ones

 

[alinwa]

PTG, jus' sayin'......