Get the second or the third, not the QQQSR, from their site:
SMALL RIFLE PRIMER (part # QQQSR) - Used as a standard
small rifle primer. Perfect for the 30 carbine and 223 standard loads.
Many people use this primer in bench and other loads for the 223. This
primer is a copper colored primer.
SMALL RIFLE MAGNUM PRIMER (part# QQQSRM) -
This is the primer we had before for use in the 5.56 loads and hot 223
loads. A thick cup for the higher pressure. We sold a lot of these
primers earlier this year. The new lot is brass colored instead of
nickel.
SMALL RIFLE 223 (part # QQQSR223) NEW NEW This is
the newest primer available in the Wolf line. It is ever so slightly
hotter than the small rifle magnum primer and it comes with a brass
colored thick cup. This primer can be used in place of the SRM primer or
used when a different powder is used that is hard to ignite.
Wolf primers look great. They are made in Russia and packaged in 100
rd trays in 1000 sleeves and 5000 cases. They are packed anvil up so no
"primer flipping" required. They are ALL BRASS and our tests indicate
excellent quality at a lower price than other primers.