Thread: .223 body taper angle ?

I want to find the exact body taper angle for a 223 case

Google just comes up with lots of images with sizes and the shoulder and extractor groove angles
But none that I have found give the body taper

Anyone got this info or know where to find it ?

What's your trigonometry skills like? Should be able to work out the angle from width at rim of 0.378, width at shoulder of 0.354, and 1.438 inches between those two spots.
I might have the SAAMI specs on my tablet, I'll have a look and see if it has angle.

If my maths is correct, the angle is very close to 1 degree (or 89 degrees, depending which way round you work)

.48 degrees. @Cigar you have to divide the .024 by 2 as this is the difference for both sides

Originally Posted by Remmodel7

.48 degrees. @Cigar you have to divide the .024 by 2 as this is the difference for both sides

True, my maths wasn't correct! Only out by 100%

I worked it all out by trial and error using the compound slide on my lathe.
Sadly the scale is typically crude and doesn't do parts of a degree.
I might add a fine screw adjustment if i intend doing more often.

I'm making ( trying ) a chamber adapter for my G2 contender to be able to fire .22 rf in my 223 barrel