Kind of a late response, but I have used the Fed. 50s.
Both my 783 and 65M prefer them.
1 inch to 11/4 inch 3 shot groups at 80yds.
-------Consistant----
I have shot 1 inch 3 shot groups at 100yds.
on occassion.
Both rifles have 4x scopes.
Regards,
Old 112