aalf,Don't see where Remington 5-1/2 primers were mentioned in that link. Also, please not that "article" was put together from SOME of my info and a variety of other sources.
Small Handgun Magnum .017" cup thickness
CCI 550 See Note 1 at the bottom of page
Federal 200
Federal 200M - Match version of above
Magtech PR-SPM
Remington 5 ½RWS 4047
Winchester WSPM
Wolf/Tula Small Pistol Magnum SPM #KVB-9M - brass cup - "For Magnum Pistol loads"
