Old Guy Assistance Requested - Factory Remington 40XBBR Barrel Contour

P

P Corncob Bob

Guest
Have recently bought a used Remington 40XBBR KS with a custom heavy varmint contour barrel installed.

Wanting to rechamber and rebarrel with a custom in exact Remington 40XBBR contour rifle came with new.

Have contacted a few custom barrel makers and Remington custom shop and they have no exact contour dimensions and will not release dimensions, respectively.

I believe breach diameter just in front of recoil lug is 1.200", and is a straight taper to 24" in front of recoil lug, but do NOT know amount of taper per inch.

Does anyone out there own a Remington 40XBBR KS with the factory Remington barrel still intact they could measure?

Really appreciate everyone's time.
 
P Corncob Bob: I have two of these and I will gladly dig them out of my vault for you.
First lets clarify - this is the green stocked 24" extra heavy barrel model right?
I have one in factory 6x47 and one in 22 Remington Benchrest.
And you want the barrel diameter at the muzzle - correct?
Hold into the wind
VarmintGuy
 
The problem

What you will get is the measurements from the Varmint Guy's barrel, but not necessarlly what was on your rifle.

We use to go through this drill because of a rule that said the replacement barrel must be the same as the factory barrel. Heck everyones barrels were different depending on what year they were made.

One of the barrel mfg has a barrel contour called a Rem-Var, which is as close as can be expected. I think it's is a Schilen.

good luck
 
P Corncob Bob: I fished out my Remington 40XB-BR KS in caliber 6x47.
It weighs 11 pounds 14 ounces with Leupold 36x scope and Hart aluminum ring bases.
The diameter of the barrel at the muzzle is .9485"
The diameter of the barrel 17" back from the muzzle is 1.1645"
I can not get a measurement just in front of the recoil lug without taking the Rifle apart (scope is in the way!).
The barrel measures 23 3/32nds from the muzzle to the front edge of the recoil lug!
The factory description describes the barrel as 24" long.
Let me know if we need to take the Rifle out of the stock - I would almost rather remove the scope and measure the diameter of the barrel from the top - I think I can get a full diameter measurement this way as the barrel sits HIGH up out of the stock - it seems.
Hope this helps.
Let me know if you need the 22 Remington Bench Rest 40XB-BR KS measured and weighed.
Hold into the wind
VarmintGuy
 
Varmint Guy:

Your measurements are very helpful. My rifle was built in 1992 or 1993 according to telephone conversation with Remington earlier today.

Muzzle diameter is .9485" and barrel diameter @ 17" from muzzle being 1.1645" is a difference of .2160" over 17" or .0127" taper per inch.

Muzzle diameter .9485" and if barrel is a "known" straight taper, and barrel taper is .0127" per inch barrel diameter at 24" (diameter at breach just in front of recoil lug) should be 1.2533", which sounds very likely to me.

By looking at barrel taper, is barrel a "known" straight taper? The only way a person could know for sure is by measuring barrel breach diameter.
 
Varmint Guy:

Forgot to say, yes my rifle does have the factory green Kevlar stock, and yes my barrel also appears to set high in barrel channel.

Cob
 
P Corncob Bob: My Remington 40XB-BR KS came into my possession on January 5th 1994 its serial number is 05801"X"-B.
By the way which caliber are you contemplating chambering your 40X in?
I tried for over 3 years to get a 40X in any configuration in caliber 6mm Remington Bench Rest.
I finally gave up when I was offered the 6x47 40XB-BR KS in 6x47 at an excellent price!
Boy oh boy am I glad that I jumped on it.
I have shot groups (5 shots at 100 yards) as small as .151" with it!
This Rifle in this chambering is one of my all time favorite long range Prairie Doggin Rifles!
Again best of luck with your project.
Hold into the wind
VarmintGuy
 
Varmint Guy:

Thank you for all your help!

I am going to order a custom barrel and supply barrel manufacturer size 1.125 breach diameter tapering .0125" per inch for 24" and leave at 26" in length.

Final length will be 24" from just in front of recoil lug, and will chamber in 6mmBR.

Cob
 
??

Bob,
I don't understand why the outside dimensions are all that important. The barrel floats with a bunch of clearance.

Any of the barrel makers (Shilen, Hart, etc) will provide a LV or HV taper barrel that will meet the rules of the game and will fit the stock.

Regards, Ron
 
P Corncob Bob: The 6mm Remington Bench Rest is an excellent cartridge/choice!
I finally decided in 1997 to begin "building" a full custom Varminter in 6mm BR.
I had mine built on a Remington single shot XP-100 action. It was built without a recoil lug! The barrel screws directly to the action. The Riflesmith who built it made a clean 90 degree angle in a normally slightly radiused "lip" on the bottom of the action - this is bedded in black Marine-Tex. The bolt faced was opened up and a Sako extractor installed along with a new bolt handle. My Rifle has a 26 1/2" Hart heavy barrel, cryoed (that was the rage back then!) it weighs 13 pounds 10 ounces with its Leupold 8.5x25 variable scope.
I originally had it chambered (necked?) for the then newish Nosler 55 grain Ballistic Tips and it shoots those extremely well but where it really shines is when shooting the 68 grain Euber custom bullets!
This Rifle shoots VERY well and is a joy to use in a Rock Chuck Colony or a Prairie Dog Town, let alone at the range.
Again best of luck with your 6mm BR.
Hold into the wind
VarmintGuy
 
Butch,
Bob said the barrel on the rifle was "a custom heavy varmint contour."

My only point was that if he replaces this barrel, it still won't be an original Remington barrel, so why so picky on the exact taper? I would think the inside of the barrel is what's important.

Regards, Ron
 
Ron,
If you will reread his post, he wants an original contour and he wants the dimensions. I know that it won't be original.
Regards Butch
 
Old Guy Assistance - Factory Remington 40XBBR Barrel Contour

Ron:

I have to go with a factory contour due to local club class rules that allows rebarreling as long as factory caliber and contour is same.

Cob
 
The Local Rule

The rule needs to be modified; because through a five year period of time you might get several different Remington factory measurements!!!!!!

The rule needs to be modified to state Varmint contour etc, lenght of XX, and weight of XX.

Heck even the lenght can vary on factory Remington barrels.

What will happen as much as you try is that you will show up with your new barrel beat someone with a factory installed barrel that has a different contour than yours and that axx hxxx will protest.
 
The Local Rule

The rule needs to be modified; because through a five year period of time you might get several different Remington factory contour measurements!!!!!!

Been there.

The rule needs to be modified to state Varmint contour etc, lenght of XX, and weight of XX.

Heck even the lenght can vary on factory Remington barrels.

What will happen as much as you try is that you will show up with your new barrel beat someone with a factory installed barrel that has a different contour than yours and that axx hxxx will protest.

If the rules allow replacement barrels they need to deal with the real world, because there is nothing worst for the sport than hard feelings over a stupid rule!!!!
 
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