Can you shim a barrel .01?

[joshb]

And the real question was......

Where’s FGuffey?

 

[joshb]

I’m a wood guy. We use shims all the time. Sorry. I revert to my old ways by habit. That was my first thought on how to fix the “problem”. When I started to think seriously about it, I realized how little I know about the mechanics involved.
These are two different guns I bought used.
Today, I spent more time measuring fired cases. It seems my first measuring “included” some primer flow. Careful triple checking reveals a 6 thousandths difference in the “bolt-face to chamber shoulder” on the two guns. I don’t have the “plastigauge” to find out the gap between the bolt rims and barrels.
I don’t use or own go and no-go gauges. I don’t know the differences in length between the two.
I know you don’t want a lot of unsupported case. I know tighter is usually better but parts that move need room to move. I don’t know the acceptable limits.
I thank everyone for the input on my dumb question. I’m trying to expand my basic knowledge of how these things work. Curiosity gets me going.
I won’t actually do anything until I get a consensus.
As it stands, grinding a little off a shellholder is the easy fix.
Sending the barrel to Bob for some “hand reaming” is another possibility.
I always keep my brass segregated for each gun. The mistake last weekend just got me thinking about another possibility.

 

[savagedasher]

Blue painters tape is around 4 thousand thick take your your long chamber gun and a case from the short gun an put blue painters tape on the back of the case and close the bolt if it closes you have 4 thousand two pieces will be about 8
I use it when I set my bump

 

[Boyd L.]

Sending both of the barrels to Bob for some “hand reaming” with the same reamer is another possibility.

Apologies for editing your post, but were it me and I had your concerns, that is the route I’d go. I might not necessarily do “hand reaming” but I’d remove a thread (or two) and have Bob (or the ‘smith of your choice) cut chambers with the same reamer. It should simplify your life.

 

[alinwa]

Boy does my brain override my brain sometimes.....

Sometimes in pool we will miss an easy gimme shot because we want shape so bad our brain "solves the problem" by making the shape.... but missing the ball.

I MISSED THE BALL on this one.

I most definitely read ONE THOUSANDTH

And the OP most definitely wrote TEN THOUSANDTHS!

I'm sorry..... I was multi-tasking, reading and posting during an extended period of phone calls in my office....

My post is rendered irrelevant.

I'm not going to change anything, just to say "please disregard my ramblings in this thread."

(stumbles blindly back under his rock, cowering in self-abasement)

 

[Shawnba67]

If anyone else ever has a measurement communication concern
0.010 is definately 10 that extra 0 makes a world of clarity.

 

[Drop Port]

Were both chambers cut with the same reamer ? If not I wouldn't bother. If they were and shoot don't screw around sticking a reamer in and cutting it back a thread. Have Bob or whoever pull the Stiller barrel skim the shoulder back .010 and set the breach face and be done with it, less chance of screwing something up.

 

[joshb]

Two lightly used guns from two different smiths. I’m grinding a shell holder tomorrow.

 

[Dusty Stevens]

Two lightly used guns from two different smiths. I’m grinding a shell holder tomorrow.

See if your neighbor has a belt sander or maybe go to harbor freight. No need in getting a high dollar one since i doubt youd use one around there

 

[joshb]

See if your neighbor has a belt sander or maybe go to harbor freight. No need in getting a high dollar one since i doubt youd use one around there

.....so this isn’t a good enough reason to buy a lathe? I’m confused.

 

[Concha]

Whatever you do............ don't install a .005 thicker recoil lug.

 

[LVLAaron]

.....so this isn’t a good enough reason to buy a lathe? I’m confused.

Definitely buy a lathe.

 

[NorCalMikie]

3 year old thread and folks are still talking??

 

[joshb]

Yup? I took them to Bob Green and he fixed them. Old news.

 

[scasa]

My first and only use of plastigage was for selecting appropriate shim thicknesses for the rod and main bearings on a Model C Allis-Chalmers tractor. Purred like a milk fed kitten.

You can also use it to check your scope base to receiver fit