For whatever it's worth to you, I have a couple boxes of Rem 1-1/2 & 7-1/2 primers from 5 or 6 years ago. I had the same problem. Waaaaayyy to many FTF per card or 100.
They now reside in the primer cabinet marked "emergency use only" as it'll take an emergency to use Rem primers ever again.

The specimens you show look like they took a pretty good strike. Yet, no boom.

Pick yo' sef up a box of CCI's or Wolf and have a go of it.



A quick edit: I just looked in the cabinet and there's 2 boxes of 5-1/2's in there, too.
Emergency use only...