these are easily solved issues IMO.I bought a henderson. The pilot galled the necks and the collet induced uneven chamfers. I went back to the Giraud. Lesson learned.
The only time I ever galled necks on brass is from straight out of the box brass (lapua) which was VERY tight in the necks. This issue was easily solved by using an expander mandrel. If you like to run heavy tension then just turn down/polish the pilot a few thou.
As far as uneven chamfers from the collet, it takes a little bit of practice and technique to get the brass perfectly straight on. Once this is learned, its a non issue.