The consensus is get the QQQSR223 - thats what I have on order from Wideners previous batch.Per Widener's nomenclature;
QQQSR KVB-223 Small Rifle Primer = Standard primer
QQQSR223 KVB-223M Small Rifle Primer = Harder cup and hotter
QQQSRM KVB-556M Small Rifle Magnum Primer (for use in 5.56 loads) = Same as standard but with a harder cup
What you say makes sense to me, because I trust your testing results, it appeared Wideners was warning folks that the packing description didn't match the intended content of the item..And I'm NOT picking on Wideners because I happen to use them and they have always provided good service.. It's just been one of those weeks, ever have one ?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.
The SMALL RIFLE MAGNUM PRIMER (part# QQQSRM) or the SMALL RIFLE 223 (part # QQQSR223) NEW NEW are the better choices. I didn't notice much of a difference.