Oversized Chamber?????

[kenscot]

Unfortunately I deleted the beginning of this thread

An oversized chamber was suggested to me as one of the of the possible cause for the problems I am experiencing with one of my rifles.
In a nut shell I had worked up a load for a new rifle using virgin brass the load that I settle on was close to the listed max but not quite there. I was getting very nice accuracy with the load. When I loaded the cases for the second time I experience a hard bolt lift. I checked case length, COA length as well as other case measurements all seem to be in spec. One thing I did notice was that I had turn my sizing die down a ful 1/4 turn down after the die made contact with the shell holder to insure easy chambering.I also tried reducing the load but got the same results. I have never experience this kind of problem before.

[KN]

I'm assuming that a hard bolt lift is after it has been fired? If so that would indicate a problem other than sizing the case. If it were not sized correctly you would have a tight bolt handle while loading the round. What caliber and what load are you using?   KN

[Steve P]

I have a similar problem with some of my dies not sizing enough on close tolerance chamber.  A couple dies had to be machined a little to get them work.  We need more info.  How does factory ammo shoot?  Hard to chamber also?  Or only after firing?

Steve