Thread: Neck die trouble shooting

Hey all, so started loading up a few rounds.
Went to use my lee neck die and all seemed fine..... until I tried a few bullets....they dropped straight in
Strange thing is the first 16 of the 50 sized, not a problem.
Any thoughts?
Cheers.
Ps I’ve read the instructions loaded 83 with the die. It just doesn’t want to squeeze em down now.
Have backed it off and also looked for a squashed collet, burred collet wings and other internet tips.
But have yet to solve why it’s not sizing. Cases are clean and all uniform in size.