the only true stainless barrel h&r has made as a complete gun, that i know of is tha 45/70 ultra-hunter.
and it is a extractor... reason i know, i got one !!! maybe J2 moded it before he gave
it to me for fathers day few years back. he knows i like extractors............
there maybe others but, most others are nickel plated.
tim can tellya better...............
.223,22-250 and 30-06 are available from tha BAP in stainless
most all current barrels are extractors