I have been where you are
But let me say this, It is not worth getting hurt or dead over a few bucks.
the ones that you have tried & would not fire are the real killers as they could go off any time after the primer has been hit.
Reload NO throw the things in the junk of course in a safe place
Why get hurt for a few bucks.
Also if you have never decaped BRENDIN primers & you reload these rounds get ready for a lot of work.
They will break your depriming punch.
You will have to ream every primer pocket
some times you have to drill out the primer hole.
A lot of work for a few bucks saved.