Nope, must be you. I have loaded nothing but Cheddites for years. I got some Winchesters mixed in recently when I was depriming A bunch of salvaged shells, and they fed fine all mixed up
I have switched to Cheddites about 6 month ago due to the shortage of everything else. Also, they are cheaper than w209. Loaded about 15,000 thousand rounds without any issues. I am using mec 9000. Good luck.
Quite the opposite. I switched from Winchesters to Cheddites about 6 years ago and the Cheddites hang up much less in my two Grabbers. A firend had the same results and feels that Cheddites are a tad bit heavier.