I size cases for short chambers. When I cut a chamber I cut the chamber short then size/form cases for the short chamber, and then to the range and road test it.
When sizing cases for short chambers I place a feeler gage between the deck of the shell holder and head of the case. My favorite shell holder for sizing cases for short chambers is the RCBS shell holder, I can shorten a case from the shoulder to the case head by .010" with a RCBS shell holder.
And then there is that thing about bumping, reloaders believe they can bump the shoulder.
I have no ideal why you insist on the bolt closing on the go-gage. I would suggest you learn to verify a gage first and verify the length of the new over the counter factory loaded ammo. Your sizing die is destined to return the case to minimum length/full length sized.
F. Guffey
When sizing cases for short chambers I place a feeler gage between the deck of the shell holder and head of the case. My favorite shell holder for sizing cases for short chambers is the RCBS shell holder, I can shorten a case from the shoulder to the case head by .010" with a RCBS shell holder.
And then there is that thing about bumping, reloaders believe they can bump the shoulder.
I have no ideal why you insist on the bolt closing on the go-gage. I would suggest you learn to verify a gage first and verify the length of the new over the counter factory loaded ammo. Your sizing die is destined to return the case to minimum length/full length sized.
F. Guffey