The Quality Cartridge web page tells me I have to ream the necks on the cylindrical brass after sizing.

"The .400 Whelen Basic is supplied as "Cylindrical". It is intended for use as a wildcatter's case to form many different .30-06 / .308 family widldcats from. The case neck will need to be reamed or turned after final forming."

I have had a few negative experiences inside neck reaming. I have a Forster trim gauge, can I get a neck reamer that will work, I can't seem to find one. Any recommendations for a tool/trimmer that will do this?

PS. I think flagged meant banner.