It uses a std. .473" rim diameter, same as a s BR or .308--Mike
With the odd rim size are you going to trim the rim or mod the bolt face ?
I compared the case capacity of the 30AR with the BRX today. (I necked up a BRX case to 30 caliber to compare the 2)
I used water to fill a BRX case and then transfered it to the 30AR. It didnt quite fill it up.
I then necked up a Dasher case and filled it with water & found it to be the same as the 30AR.
Anyone had any experience with this brass? Will it hold up to the pressures of a Dasher?
Where can I get some brass?