SELLIER & BELLOT PRIMER LARGE PISTOL

SELLIER & BELLOT PRIMER LARGE PISTOL I found these for $119 per 5000, are the any good?
Or FEDERAL PRIMER LARGE PISTOL MAGNUM MATCH for $169 per 5000

I have no experience but have read on some other forums that the S&B have dimensional issues and ignition problems. I would use standard primers vs. magnum.
An alternative to S&B is Tula. Primers are starting to become more available, I would wait.
Wideners has some primers in stock.