Barrel indexing

Kyrie · 07-27-2001, 02:42 PM

Hi William,

Pistols with barrels that screw into a barrel extension typically have the barrel installed in the barrel extension and then the chamber is finish reamed to correct headspace. A witness mark is then made to indicate how far into the barrel extension the barrel must be re-installed if it is ever removed for some purpose. Position of the front sight and threading of the barrel or barrel extension are non-issues.

OTOH, if the barrel or breech block are ever replaced headspace must again be inspected and set as necessary.

Hope this helps.

Best regards,

Kyrie

07-27-2001, 02:42 PM	#6
Kyrie User Join Date: Jun 2002 Posts: 757 Thanks: 0 Thanked 212 Times in 101 Posts	Re: Barrel indexing Hi William, Pistols with barrels that screw into a barrel extension typically have the barrel installed in the barrel extension and then the chamber is finish reamed to correct headspace. A witness mark is then made to indicate how far into the barrel extension the barrel must be re-installed if it is ever removed for some purpose. Position of the front sight and threading of the barrel or barrel extension are non-issues. OTOH, if the barrel or breech block are ever replaced headspace must again be inspected and set as necessary. Hope this helps. Best regards, Kyrie