Any Experienced Barrel Installers out there?

[purple]

I've installed 2 dozen plus Garand barrels and am now looking at my first Carbine install,but do not want to extrapolate my Garand experience to the Carbine.
I have an Inland 4-45 take-off barrel which I would like to install on a Rockola receiver. I have a formed barrel block for the Carbine and a Brownells action wrench and will be using Brownells barrel paste for the install. My concern is the degree of barrel offset which exists before installation. I have the Kuhnhausen Shop Manual which indicates that the max degree of permissible offset for a barrel is 1/12 rotation,or 30 degrees at the initial hand tight position. The manual also mentions that the carbine is a bit forgiving in this regard. The manual does'nt indicate if this applies to a new or used barrel.
In the case of Garands I have successfully installed used barrels which were 30 degrees offset at the starting position versus a recommended 15 degree max offset for new barrels.
My situation with this barrel is that it is at 40 degrees offset at the initial position as established with an angle finder. I'm wondering what others have experienced with the max degree of offset when installing a used barrel. I do not want to overstress the barrel or receiver by attempting to bull it on in a no-go situation. I have a WRA receiver which I also trial fitted with this barrel,but it is definitely a non-starter with 50 degrees of offset.

Information

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[STU1]

you may have to turn a few thousands off the shoulder ( do it a thou at a time till you have it were you want it) install to proper index then check headspace. i've done that to brand new barrels as i have encountered the same situation and i didn't want to ruin a receiver trying to hoss it on they can be easily tweaked out of shape.

[jimb16]

As Stu said, you may have to turn the shoulder back, but remember, once you have done this, you will need to check the headspace and may need to recut the chamber.

[painter777]

Any links to more info on barrel swapping?

TIA,
Charlie-painter777

[Chuckindenver]

on the bottom of the reciever, youll see a witness mark,
and the same type of mark on the barrel
when you hand tighten up the barrel, they should be no more then 1/8 apart.
turning back the shoulder on a carbine barrel will likely ruin it.
you will have to trun the breach face as well, and loose the skirt.
if your barrel is over index when hand tight, sometimes you can peen the shoulder over and get one good crush fit.
careful when you tighten , many carbines have been ruined, by crushing the spring well, or spring tube housing..
if you contact me outside the forum.,ill be happy to give you my rates,
and a fast turn around.

[painter777]

Thanks Chuck,
I just figured this would be a good thread to add any info available about barrel swapping.
Noticed a few members have been asking about it.

Regards,
Charlie-painter777

[purple]

Appreciate the info to this point. I'm familiar with the witness marks on the bottom of the barrel and receiver and also understand that I need to use parallel bars on the flats of both barrel and receiver to verify correct alignment as these marks may be somewhat mis-located.
I'm leery of any work to turn down either the barrel shoulder or receiver face to get a closer hand tight initial position and I realize that this may well bring the barrel skirt into hard contact with the receiver ring. I may well have a no-go situation here which would require me to locate a new barrel for this receiver and/or a new receiver which would better fit this barrel.
To return to my original question. What experiences have others had with successfully installing a used barrel from an initial 40 degree offset (or greater) position?

[STU1]

then maybe you need to find another barrel nobody suggested anything about turning the receiver face. if you have installed barrels on Garand receivers turning the shoulder to fit is SOP if you have an offset to which you can't properly fit a barrel. for what it is worth you may already have hard contact from the barrel skirt have you checked for that?? or you can roll the shoulder to give you a better fit; Chucks suggestion to peen is the same concept but the shoulder is rolled between two steel rollers and is a bit better on the shoulder for an even end result, not peened good luck to you Sir regards.

[Chuckindenver]

then maybe you need to find another barrel nobody suggested anything about turning the receiver face. if you have installed barrels on Garand receivers turning the shoulder to fit is SOP if you have an offset to which you can't properly fit a barrel. for what it is worth you may already have hard contact from the barrel skirt have you checked for that?? or you can roll the shoulder to give you a better fit; Chucks suggestion to peen is the same concept but the shoulder is rolled between two steel rollers and is a bit better on the shoulder for an even end result, not peened good luck to you Sir regards.

show me what that tool looks like that rolls the shoulder...iv yet to see one.

[STU1]

i'll post a pic tomorrow we use it on Garand barrels it is actually a pipe cutter with the cutters removed and in their place steel roller installed, it works great.