Originally Posted by Coyboy
I have noticed with certain lots of Winchester brass that the case heads/ web areas are undersized in dia.
This causes the bulge in the case body ahead of the web. as the webs are to thick to stretch to chamber dimension.
If you size the brass FL and the bulge is still noticable than most likly it is an undersized web, That or measure your webs and compare them with a cartrige diagram, you can also measure the bulged area and comapare that to what the cartrige diagram shows.
This would be my 1st choice for the perceived problem also.
Most factory ammo is sized smaller than SAAMI specs so it will chamber in any chamber
clean or dirty. If you have access to a micrometer measure the fired case at the bulge
and then compare it to the SAAMI chamber specs and this will tell you if it is a chamber
problem or a brass problem.
I would not think it was a head space problem because Kevin is a good smith and could
not miss the head space enough to create this problem unless the wrong gauge was used
by mistake (I once used a field gauge buy mistake but caught it before the chamber was
The only other thing I can think of is, If the tail stock is knocked off center by a few thousandths
it will make the rear of the chamber a little larger than the reamer. (Been there to)
Most factory ammo will have a slight amount of expanding at the base and some is normal
If you could post a picture we could probable tell if it was excessive.
Either way I know that Kevin will take care of you.
J E CUSTOM