Hornet undoing,is typically sloppy chamber/headspace.
Punch it K-Hornet and live a little...I've 5 of them,4 in 77/22.
All love 400's,H-110/Win296 and 33/5 gr V-Max via Redding dies,kissing lands. Pards have a bunch more,that respond likewise.
They're driving 77/22's as well....................