tight inside neck after sizing down for wildcat

25 caliber made from 28 caliber
full sized once fired brass from friend who shot it in his 28 cal

Problem ---the lee trim gauge which normally works, won't fit inside the brass

tried running just the expander thru the brass, still no go

it is the same brand of brass I always use and I have never had to ream before, just neck turn for accuracy if I want.

I have a neck turner and a reamer for 25 cal, but neither fits this brass

should I try annealing then run just the expander thru it?

That worked. annealing then expander thru.

Another option is an inside neck turning cutter from Forster, if you're using a Forster trimmer for your base. The cutter will also remove any donut that formed inside the case during the forming process. I use this process when I form 6.5-06 from 30-06 as an example.