case length question

btm_54 · Post by **btm_54** » Thu Jun 17, 2010 12:28 am

How do you measure the maximum length of a case for your rifle?
I brought a batch of Remington brass that has different case lengths and I wanted to find out how people measure their chambers to work out where the lip in their barrel is.
Thanks in advance

Ovenpaa · Post by **Ovenpaa** » Thu Jun 17, 2010 5:08 am

Easy to do but how to describe...

Trim the case neck back 80 thou then make a small plug with two diamaters to fit inside it. The smaller diameter is say .308 by half inch long and the greater diameter is the same as the external diameter of the neck by 50 thou long

Push the smaller diameter end into the neck, it should be a snug sliding fit leaving a bit sticking out, chamber the case and remove and the distance from the top of the plug to the base of case is you maximum case length.

I would take a picture of mine but it is not here right now. Perhaps some one will be along shortly to post a picture or offer a more worthy explanation.

Edit - a bit like this: http://www.varmintal.com/gagecl.jpg

Post by **AlanF** » Thu Jun 17, 2010 9:40 am

This what I use : http://www.sinclairintl.com/.aspx/pid=32925/Product/Sinclair_Chamber_Length_Gage. Pro-Cal will probably have them.

Alan

David B · Post by **David B** » Thu Jun 17, 2010 11:12 am

The simple way ask whoever fitted your barrel for a drawing of the chamber reamer, could save a lot of time
David

btm_54 · Post by **btm_54** » Wed Jun 23, 2010 2:05 am

David B wrote:The simple way ask whoever fitted your barrel for a drawing of the chamber reamer, could save a lot of time
David

I thought about getting in touch with the gunsmith.
He passed away.

btm_54 · Post by **btm_54** » Wed Jun 23, 2010 2:07 am

Thank you for the replies I appreciate them.

David B · Post by **David B** » Wed Jun 23, 2010 7:57 pm

What is the rifle chambered in? You may find some drawings of standard chambers on 6mmbr or try one of the reamer manufacturers

btm_54 · Post by **btm_54** » Wed Jun 23, 2010 9:15 pm

David B wrote:What is the rifle chambered in? You may find some drawings of standard chambers on 6mmbr or try one of the reamer manufacturers

270-08

btm_54 · Post by **btm_54** » Tue Jun 29, 2010 8:34 am

AlanF wrote:This what I use : http://www.sinclairintl.com/.aspx/pid=32925/Product/Sinclair_Chamber_Length_Gage. Pro-Cal will probably have them.

Alan

I have ordered one of these. Thanks for the heads up Alan.

btm_54 · Post by **btm_54** » Fri Jul 16, 2010 10:10 pm

Those case length gauges work well.
They are not that expensive as well.

David B · Post by **David B** » Sat Jul 17, 2010 4:55 pm

How far away from 2.015" was your maximum case length?

btm_54 · Post by **btm_54** » Mon Jul 19, 2010 1:47 am

2.103"

David B · Post by **David B** » Mon Jul 19, 2010 3:41 pm

That's interesting, is a .270/08 based on a 7mm/08 which is a .308win necked down? I suppose the shoulder neck junction will move forward as the diameter decreases. What length are you new brass? Just curious
David