I load for four 7 Rem mags. I don’t have time or patience to keep the brass separate. I full length size the cases. All four are sub inch with one of the Sakos almost a one hole rifle. As long as I’m an inch or less I’m fine for hunting. I load all the same length.
I'm glad you are getting the results you are. I reload for multiple .30-'06, 8x57, .300 Savage, .32 Winchester Special, and .30-30. I used to mix brass between the rifles but have had better results since I stopped.