The Firing Line Forums - View Single Post - Can these marks on my cases be something other then ???

**Unclenick** · June 12, 2019, 02:25 PM

Look at the FlexHone rifle chamber tools for removing those marks. Takes about 30 seconds each with a coarse and fine one. That won't fix the headspace though. A new chamber should be between the minimum and +0.004" over that. Allowing about -0.001" spring-back after fireforming, then your chamber sounds like it is about +0.009" over the minimum, which exceeds a commercial Field Reject gauge, which is usually +0.008".

June 12, 2019, 02:25 PM	#17
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,060	Look at the FlexHone rifle chamber tools for removing those marks. Takes about 30 seconds each with a coarse and fine one. That won't fix the headspace though. A new chamber should be between the minimum and +0.004" over that. Allowing about -0.001" spring-back after fireforming, then your chamber sounds like it is about +0.009" over the minimum, which exceeds a commercial Field Reject gauge, which is usually +0.008". __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle