SGJennings
New member
How do I *accurately* measure the neck cut by a brand-spanking new reamer? Both the diameter and the length? For the purposes of neck turning and trim length.
Greg J.
Greg J.
I assume (I know - that makes an ass out of you and me) that the chamber length of a properly headspaced chamber is the headspace allowance (very, very small) plus what the reamer print shows. I measure the chamber neck diameter with a small hole gauge and a micrometer which is the best I can do with the equipment I have.
Alinwa
We can’t exist without assuming.
------I assume that Dave Kiff is ........
------I assume that the premier benchrest gunsmiths .........
I know that you can cut an oversized chamber with a reamer, but I do not think you can cut a chamber that is undersized with regard to any of the reamer diameter dimensions or the reamer neck length dimension.
------- I believe holding case lengths under the chamber length is generally accepted procedure...........
-------I believe holding loaded round neck diameter under the chamber neck diameter is generally accepted procedure..................
-------I believe the small hole gauge/micrometer properly used will indicate if the neck diameter is significantly undersize due to an error in reamer grinding.................