RE-Barrel

[french]

I rebarreled a remington 700 myself and used a stoney point headspace gauge to measure shoulder expansion before and after firing. I'm getting about 5thou expansion at the datum line after firing a mild load. (.243 win). Is this exceptable or should I consider having a gunsmith set the shoulder back.

 

[Dennis Sorensen]

That amount of expansion is not a good indicator of anything but how much under size the brass may have been to start with.

An accurate measurement of the reamer and fired brass is what you want to compare. In my opinion...

After re reading your post I have a question, are you talking about the case fire forming to the headspace of the rifle or the diameter of the shoulder when the case is fired? What does "shoulder expansion" refer to?

 

[crb]

Just adjust the sizing die so you are setting the shoulder back somewhere between .001 and .003, whatever it takes to have a non-stiff bolt closing on the sized case. My BR actions will accept .0005. to .001 and have the correct closing feel. My Remingtons need .002 to .003.

 

[mike in co]

the two above have lots more experience than me, and have headed you in the right direction.
my question is, when you rebbl'd did you use a go and no go gage?

as has been said, size a case till you can litley close the bolt.,,that is the case at the datum is the same size before and after closing the bolt.
log the number.
fire the gun, do not immediatlely open the bolt. let it sit for 5-10 sec. remove the case carefully. measure to the datum. record the number

ok the first number should be between go and no go..1.630/1.633

i dont have ideal numbers, but the fired case should not be more than plus0.003 in a match chamber( not a br chamber).

this case should be easy to resize, and should only be sized to the first logged number to minus .001 from there.

i dont think you re-bbl'd, you replaced the existing bbl.

mike in co

 

[Bnhpr]

I rebarreled a remington 700 myself and used a stoney point headspace gauge to measure shoulder expansion before and after firing. I'm getting about 5thou expansion at the datum line after firing a mild load. (.243 win). Is this exceptable or should I consider having a gunsmith set the shoulder back.

Is the .005" change between new brass and once fired, or between resized brass and re-fired?

Other factors to look at is how much your brass grows (overall length) after its resized several firing cycles, and, of course, how the brass holds up.

I would consider all this before facing it back. Are you between go and no go?