Thread: loose primers

So how loose is loose and what to do about it?
Bought some s/h brass,checked size etc,started seating primers with my
hand primer and noticed they required very little pressure to seat,much less than usual.
They seem secure,don't fall out but I haven't come across this before or had any other primer issues
so I'm keen not to start.
Will gas leak past them or will they seal ok?
Norma brass,federal 215 fyi
So is the brass stretched?too much?
I read that european primers are slightly larger diameter,should I use them?
Interested in your thoughts and experience,
cheers