Measuring Finished Chamber Dimensions

[Jud96]

What are you guys using to measure the back end of your finished chambers to verify they’re on size and not oversize?

I have a 0.2-1.2” inside mic I’m going to try and use, but I’m unsure how it’ll do on a tapered bore like a chamber.

I have heard of using pin gauges, but again since the chamber is a tapered hole I don’t know how well they would work.

Thanks

 

[Bob3700]

You could use a telescoping gauge n micrometer to measure the back of the chamber.

 

[DRK]

Chamber cast if you are not in a hurry.

 

[Will Henry]

I believe it was Jackie Schmidt who said (more or less), if you have the reamer, you have a pretty good gauge. Otherwise, your inside mic will work OK. Measuring to close tolerances is an art as much as a science. WH

 

[Jud96]

I believe it was Jackie Schmidt who said (more or less), if you have the reamer, you have a pretty good gauge. Otherwise, your inside mic will work OK. Measuring to close tolerances is an art as much as a science. WH

Thank you. I use mics everyday, so I’m comfortable with them, but measuring a tapered bored like a chamber is something I don’t have a lot of experience with.

 

[Tod Hendricks]

This works very good for the base and all the way to the shoulder and repeatable. https://www.penntoolco.com/electron...kyUKlYdxe1yvKD_g_CSxVawkJ8p5dyrAaAnmPEALw_wcB