I'm experiencing a dilemma in regards to my sized 280AI brass, I'm loading Nosler brand. It's been loaded approximately four times now with the brass being neck sized in a Lee collet die with a polished mandrel.

Shooting at the range yesterday I realized the rounds were chambering pretty hard. Accuracy was not up to par on any of the loads fired even though they shot well the last time out. Some brass was hard to extract with a hard bolt lift even thought the loads were well below maximum.

I decided to re-size the brass using my Redding bump die. It didn't do one bit of good as the sized brass was still chambering hard. I trimmed all the sized brass to the length of the shortest case which was 2.517" thinking maybe my brass was too long....still no change in the effort to close the bolt.

Plan B - I then utilized the Redding f/l die adjusted for camover at the top of the ram stroke when the die contacted the shell holder on my RCBS Rockchucker Junior and the results was the same? The bolt closes a little easier now but there's still resistance when I close the bolt on a full length sized case as if the bump die and f/l die are not sizing the case shoulder enough. Could I have set the headspace too tight when I installed the barrel? Bad Lee or Redding size dies?