How to mesuare C.O.L

[Matt88]

I have always used the method where you take some brass that has been fired in you gun, put a bullet in and chamber it, but I can't with my new gun. There is not enough neck tention in the shot rounds to even hold a bullet. What is another method for finding C.O.L?
Thanks

[25tikka]

there is another thread on this but I don't remember which one????? Just neck size the first 1/8 inch of the case and this will give enough neck tension but still allow the bullet to slide. I will try to find the other thread as another member had another idea that should work as good or better than mine.

http://huntshoot.coastangler.com/hun...ain.tsx-10591/

This should help you out

[slopeshunter]

Are you reloading? If so just resize the brass first then you should be good to go.

[Matt88]

I have tried to size the first 1/8" of the neck first but It seemed to have to much tention.

[BarryL]

You must have a pretty sloppy chamber for that to happen. Sinclair sells a tool for this. Problem with to much tension when your doing this is your also measureing a lot of jam into the lands. Take a fired round with very little tension and some glue that bonds copper to brass. Wipe the inside of the neck and start a bullet. Chamber it then come back next day, extract and measure.

[Spitzer]

Take a resized case and do this.


http://www.larrywillis.com/OAL.html

[Matt88]

Do you think my chamber is sloppy? Is that why when I try the mothod above, there is no neck tention? Is my chamber slightly over size?

[Cariboo]

Originally Posted by Matt88

Do you think my chamber is sloppy? Is that why when I try the mothod above, there is no neck tention? Is my chamber slightly over size?

Your chamber is fine.

If I had a rifle whose un-sized fired cases gripped a bullet at all I would be worried about having too tight a neck.

If you take your fired case and press 2 opposite sides of the neck on a table just enough to "oval" the opening enough to hold a bullet you will be good to go.

[BarryL]

Not nessecarily sloppy but if theres to much neck clearance your not going to get to many loads before the necks start splitting. Mike a loaded round then a fired case, allow for .001" spring back and that will tell you what your clearance is. Im probably to anal from loading for bench where I run .0015" per side. My 300WM with a Bevon King barrel is .003" per side if I recall. When I had the Winchester barrel on the action it was a toss up which went first, the case head, the primer pocket or the neck.