Fix for, Oversize receiver barrel tendon minor diameter?

[Doug W]

1st time poster.
Thought I would post over here since it is a lot of rem and Rem clone guys.

I am scratchbuilding a couple of Rem clones, here if interested.
http://forums.accuratereloading.com/eve/forums/a/tpc/f/9411043/m/5611038042

Anyway, one of them I got the rough drilling for the barrel tendon off center, done before broaching to reduce the broach cut length. Not sure how since the other 2 were fine.
So now when I went to final bore the lug seats and barrel minor thread diameter I had to go oversize to make it concentric.
1-1/16 x 16 tpt class 3A/3B I should have a max of 1.003" and I got 1.018".

I am not using factory barrels and with fit the thread, so that isn't an issue.
The rifle will be 223 or sumptin like that.

So what is the best fix?

 

[mwezell]

Just machine the barrel to fit. It would be a good idea to engrave pitch diameter and other thread specs on the bottom of the action.

 

[Doug W]

Yes, but do I make the major dia oversize also for full thread engagement?
Or not worry about it?

 

[mwezell]

Yes, but do I make the major dia oversize also for full thread engagement?
Or not worry about it?

In a word, yes.

 

[Rubicon Prec.]

Just figure out what a 1.075-16 thread specs should be and make everything fall into that. I've seen guys go up to 1.095-16 on Remington receivers without issue.

 

[Doug W]

Thanks that is what I needed to know.

 

[10vpossible]

I'd get a piece of scrap steel and try that before experimenting on a barrel.

 

[jackie schmidt]

Threads fit on the Pitch Diameter. The major and minor diameters have clearance. .0075 to the side missing on the minor diameter is not going to affect anything.