Can not figure it out

[KnotRight]

I was working a bunch of range pickup 6.5 CM brass yesterday and today using Hornady dies and they are very tight in the press. I do understand that brass does have different thickness. When resizing the brass how can the outside not form to the die?

I had a few pieces that would not fit flush in the case gauge. Some were so bad that the base was sticking out as much as the rim. You would think that the shoulders would be the same since the dies are locked down.

Most of the brass that I had was Hornady (and those were the ones that I had problems with). The brass that felt the best was Sig.

I also did 3 one gallon size of 308 brass with Hornady dies and every one fit flush in the gauge.

 

[Sasquatch]

I'm having the same issue with some 308. Doing some reading, it seems that brass can get overworked, brittle and loses its ability to be reformed. You get the die over it and instead of taking the shape, it springs back. I read that annealing the neck has helped some, but it's obvious just above the case head is where it isn't being sized. Try turning the brass around backwards and putting it in the gauge and you may see where it is sticking. Though annealing the neck seems popular, putting heat any where else on the case sounds like a big no-no. Another solution is to use small-base dies which squeeze the brass further (but I was using that already).

 

[Charlie]

Take a look at the rims to see whether they have nicks and dings in them. I often have cases that will not fit into a gauge because the rim has some spur on it that keeps it from entering. I keep a small file on my bench to fix those cases even though they probably will fit into the chamber without problems.